Hi Jagan,
On 01.10.2022 10:06, Jagan Teki wrote:
> Samsung MIPI DSIM controller is common DSI IP that can be used in various
> SoCs like Exynos, i.MX8M Mini/Nano.
>
> In order to access this DSI controller between various platform SoCs,
> the ideal way to incorporate this in the drm stack is via the drm bridge
> driver.
>
> This patch is trying to differentiate platform-specific and bridge driver
> code by maintaining exynos platform glue code in exynos_drm_dsi.c driver
> and common bridge driver code in samsung-dsim.c providing that the new
> platform-specific glue should be supported in the bridge driver, unlike
> exynos platform drm drivers.
>
> - Add samsung_dsim_plat_data for keeping platform-specific attributes like
> host_ops, irq_ops, and hw_type.
>
> - Initialize the plat_data hooks for exynos platform in exynos_drm_dsi.c.
>
> - samsung_dsim_probe is the common probe call across exynos_drm_dsi.c and
> samsung-dsim.c.
>
> - plat_data hooks like host_ops and irq_ops are invoked during the
> respective bridge call chains.
>
> v6:
> * handle previous bridge pointer for exynos dsi
There are still issues, see my comments below.
> v5:
> * [mszyprow] reworked driver initialization using the same approach as in
> drivers/gpu/drm/{exynos/exynos_dp.c, bridge/analogix/analogix_dp_core.c},
> removed weak functions, moved exynos_dsi_driver back to exynos_drm_dsi.c
> and restored integration with exynos_drm custom initialization.
> * updated the commit message [Jagan]
>
> v4:
> * include Inki Dae in MAINTAINERS
> * remove dsi_driver probe in exynos_drm_drv to support multi-arch build
>
> v3:
> * restore gpio related fixes
> * restore proper bridge chain
> * rework initialization issue
> * fix header includes in proper way
>
> v2:
> * fixed exynos dsi driver conversion (Marek Szyprowski)
> * updated commit message
> * updated MAINTAINERS file
>
> v1:
> * don't maintain component_ops in bridge driver
> * don't maintain platform glue code in bridge driver
> * add platform-specific glue code and make a common bridge
>
> Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
> Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
> ---
> MAINTAINERS | 9 +
> drivers/gpu/drm/bridge/Kconfig | 12 +
> drivers/gpu/drm/bridge/Makefile | 1 +
> drivers/gpu/drm/bridge/samsung-dsim.c | 1703 ++++++++++++++++++++++
> drivers/gpu/drm/exynos/Kconfig | 1 +
> drivers/gpu/drm/exynos/exynos_drm_dsi.c | 1769 ++---------------------
> include/drm/bridge/samsung-dsim.h | 113 ++
> 7 files changed, 1955 insertions(+), 1653 deletions(-)
> create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.c
> create mode 100644 include/drm/bridge/samsung-dsim.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 9ae989b32ebb..ba7a6721443c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -6624,6 +6624,15 @@ T: git git://anongit.freedesktop.org/drm/drm-misc
> F: Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
> F: drivers/gpu/drm/panel/panel-samsung-db7430.c
>
> +DRM DRIVER FOR SAMSUNG MIPI DSIM BRIDGE
> +M: Jagan Teki <ja...@amarulasolutions.com>
> +M: Marek Szyprowski <m.szyprow...@samsung.com>
> +M: Inki Dae <inki....@samsung.com
> +S: Maintained
> +T: git git://anongit.freedesktop.org/drm/drm-misc
> +F: drivers/gpu/drm/bridge/samsung-dsim.c
> +F: include/drm/bridge/samsung-dsim.h
> +
> DRM DRIVER FOR SAMSUNG S6D27A1 PANELS
> M: Markuss Broks <markuss.br...@gmail.com>
> S: Maintained
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 57946d80b02d..8e85dac9f53e 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -231,6 +231,18 @@ config DRM_PARADE_PS8640
> The PS8640 is a high-performance and low-power
> MIPI DSI to eDP converter
>
> +config DRM_SAMSUNG_DSIM
> + tristate "Samsung MIPI DSIM bridge driver"
> + depends on COMMON_CLK
> + depends on OF && HAS_IOMEM
> + select DRM_KMS_HELPER
> + select DRM_MIPI_DSI
> + select DRM_PANEL_BRIDGE
> + help
> + The Samsung MIPI DSIM bridge controller driver.
> + This MIPI DSIM bridge can be found it on Exynos SoCs and
> + NXP's i.MX8M Mini/Nano.
> +
> config DRM_SIL_SII8620
> tristate "Silicon Image SII8620 HDMI/MHL bridge"
> depends on OF
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index 1884803c6860..dae843723991 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) +=
> megachips-stdpxxxx-ge-b850v
> obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
> obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
> obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
> +obj-$(CONFIG_DRM_SAMSUNG_DSIM) += samsung-dsim.o
> obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
> obj-$(CONFIG_DRM_SII902X) += sii902x.o
> obj-$(CONFIG_DRM_SII9234) += sii9234.o
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c
> b/drivers/gpu/drm/bridge/samsung-dsim.c
> new file mode 100644
> index 000000000000..73dcd825c654
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -0,0 +1,1703 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Samsung MIPI DSIM bridge driver.
> + *
> + * Copyright (C) 2021 Amarula Solutions(India)
> + * Copyright (c) 2014 Samsung Electronics Co., Ltd
> + * Author: Jagan Teki <ja...@amarulasolutions.com>
> + *
> + * Based on exynos_drm_dsi from
> + * Tomasz Figa <t.f...@samsung.com>
> + */
> +
> +#include <asm/unaligned.h>
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/irq.h>
> +#include <linux/of_device.h>
> +#include <linux/phy/phy.h>
> +
> +#include <video/mipi_display.h>
> +
> +#include <drm/bridge/samsung-dsim.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +
> +/* returns true iff both arguments logically differs */
> +#define NEQV(a, b) (!(a) ^ !(b))
> +
> +/* DSIM_STATUS */
> +#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
> +#define DSIM_STOP_STATE_CLK (1 << 8)
> +#define DSIM_TX_READY_HS_CLK (1 << 10)
> +#define DSIM_PLL_STABLE (1 << 31)
> +
> +/* DSIM_SWRST */
> +#define DSIM_FUNCRST (1 << 16)
> +#define DSIM_SWRST (1 << 0)
> +
> +/* DSIM_TIMEOUT */
> +#define DSIM_LPDR_TIMEOUT(x) ((x) << 0)
> +#define DSIM_BTA_TIMEOUT(x) ((x) << 16)
> +
> +/* DSIM_CLKCTRL */
> +#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
> +#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
> +#define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19)
> +#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
> +#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
> +#define DSIM_BYTE_CLKEN (1 << 24)
> +#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
> +#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
> +#define DSIM_PLL_BYPASS (1 << 27)
> +#define DSIM_ESC_CLKEN (1 << 28)
> +#define DSIM_TX_REQUEST_HSCLK (1 << 31)
> +
> +/* DSIM_CONFIG */
> +#define DSIM_LANE_EN_CLK (1 << 0)
> +#define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
> +#define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
> +#define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
> +#define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
> +#define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
> +#define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
> +#define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
> +#define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
> +#define DSIM_SUB_VC (((x) & 0x3) << 16)
> +#define DSIM_MAIN_VC (((x) & 0x3) << 18)
> +#define DSIM_HSA_MODE (1 << 20)
> +#define DSIM_HBP_MODE (1 << 21)
> +#define DSIM_HFP_MODE (1 << 22)
> +#define DSIM_HSE_MODE (1 << 23)
> +#define DSIM_AUTO_MODE (1 << 24)
> +#define DSIM_VIDEO_MODE (1 << 25)
> +#define DSIM_BURST_MODE (1 << 26)
> +#define DSIM_SYNC_INFORM (1 << 27)
> +#define DSIM_EOT_DISABLE (1 << 28)
> +#define DSIM_MFLUSH_VS (1 << 29)
> +/* This flag is valid only for exynos3250/3472/5260/5430 */
> +#define DSIM_CLKLANE_STOP (1 << 30)
> +
> +/* DSIM_ESCMODE */
> +#define DSIM_TX_TRIGGER_RST (1 << 4)
> +#define DSIM_TX_LPDT_LP (1 << 6)
> +#define DSIM_CMD_LPDT_LP (1 << 7)
> +#define DSIM_FORCE_BTA (1 << 16)
> +#define DSIM_FORCE_STOP_STATE (1 << 20)
> +#define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
> +#define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
> +
> +/* DSIM_MDRESOL */
> +#define DSIM_MAIN_STAND_BY (1 << 31)
> +#define DSIM_MAIN_VRESOL(x, num_bits) (((x) & ((1 << (num_bits)) -
> 1)) << 16)
> +#define DSIM_MAIN_HRESOL(x, num_bits) (((x) & ((1 << (num_bits)) -
> 1)) << 0)
> +
> +/* DSIM_MVPORCH */
> +#define DSIM_CMD_ALLOW(x) ((x) << 28)
> +#define DSIM_STABLE_VFP(x) ((x) << 16)
> +#define DSIM_MAIN_VBP(x) ((x) << 0)
> +#define DSIM_CMD_ALLOW_MASK (0xf << 28)
> +#define DSIM_STABLE_VFP_MASK (0x7ff << 16)
> +#define DSIM_MAIN_VBP_MASK (0x7ff << 0)
> +
> +/* DSIM_MHPORCH */
> +#define DSIM_MAIN_HFP(x) ((x) << 16)
> +#define DSIM_MAIN_HBP(x) ((x) << 0)
> +#define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
> +#define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
> +
> +/* DSIM_MSYNC */
> +#define DSIM_MAIN_VSA(x) ((x) << 22)
> +#define DSIM_MAIN_HSA(x) ((x) << 0)
> +#define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
> +#define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
> +
> +/* DSIM_SDRESOL */
> +#define DSIM_SUB_STANDY(x) ((x) << 31)
> +#define DSIM_SUB_VRESOL(x) ((x) << 16)
> +#define DSIM_SUB_HRESOL(x) ((x) << 0)
> +#define DSIM_SUB_STANDY_MASK ((0x1) << 31)
> +#define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
> +#define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
> +
> +/* DSIM_INTSRC */
> +#define DSIM_INT_PLL_STABLE (1 << 31)
> +#define DSIM_INT_SW_RST_RELEASE (1 << 30)
> +#define DSIM_INT_SFR_FIFO_EMPTY (1 << 29)
> +#define DSIM_INT_SFR_HDR_FIFO_EMPTY (1 << 28)
> +#define DSIM_INT_BTA (1 << 25)
> +#define DSIM_INT_FRAME_DONE (1 << 24)
> +#define DSIM_INT_RX_TIMEOUT (1 << 21)
> +#define DSIM_INT_BTA_TIMEOUT (1 << 20)
> +#define DSIM_INT_RX_DONE (1 << 18)
> +#define DSIM_INT_RX_TE (1 << 17)
> +#define DSIM_INT_RX_ACK (1 << 16)
> +#define DSIM_INT_RX_ECC_ERR (1 << 15)
> +#define DSIM_INT_RX_CRC_ERR (1 << 14)
> +
> +/* DSIM_FIFOCTRL */
> +#define DSIM_RX_DATA_FULL (1 << 25)
> +#define DSIM_RX_DATA_EMPTY (1 << 24)
> +#define DSIM_SFR_HEADER_FULL (1 << 23)
> +#define DSIM_SFR_HEADER_EMPTY (1 << 22)
> +#define DSIM_SFR_PAYLOAD_FULL (1 << 21)
> +#define DSIM_SFR_PAYLOAD_EMPTY (1 << 20)
> +#define DSIM_I80_HEADER_FULL (1 << 19)
> +#define DSIM_I80_HEADER_EMPTY (1 << 18)
> +#define DSIM_I80_PAYLOAD_FULL (1 << 17)
> +#define DSIM_I80_PAYLOAD_EMPTY (1 << 16)
> +#define DSIM_SD_HEADER_FULL (1 << 15)
> +#define DSIM_SD_HEADER_EMPTY (1 << 14)
> +#define DSIM_SD_PAYLOAD_FULL (1 << 13)
> +#define DSIM_SD_PAYLOAD_EMPTY (1 << 12)
> +#define DSIM_MD_HEADER_FULL (1 << 11)
> +#define DSIM_MD_HEADER_EMPTY (1 << 10)
> +#define DSIM_MD_PAYLOAD_FULL (1 << 9)
> +#define DSIM_MD_PAYLOAD_EMPTY (1 << 8)
> +#define DSIM_RX_FIFO (1 << 4)
> +#define DSIM_SFR_FIFO (1 << 3)
> +#define DSIM_I80_FIFO (1 << 2)
> +#define DSIM_SD_FIFO (1 << 1)
> +#define DSIM_MD_FIFO (1 << 0)
> +
> +/* DSIM_PHYACCHR */
> +#define DSIM_AFC_EN (1 << 14)
> +#define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
> +
> +/* DSIM_PLLCTRL */
> +#define DSIM_FREQ_BAND(x) ((x) << 24)
> +#define DSIM_PLL_EN (1 << 23)
> +#define DSIM_PLL_P(x) ((x) << 13)
> +#define DSIM_PLL_M(x) ((x) << 4)
> +#define DSIM_PLL_S(x) ((x) << 1)
> +
> +/* DSIM_PHYCTRL */
> +#define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0)
> +#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP (1 << 30)
> +#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP (1 << 14)
> +
> +/* DSIM_PHYTIMING */
> +#define DSIM_PHYTIMING_LPX(x) ((x) << 8)
> +#define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0)
> +
> +/* DSIM_PHYTIMING1 */
> +#define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24)
> +#define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16)
> +#define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8)
> +#define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0)
> +
> +/* DSIM_PHYTIMING2 */
> +#define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16)
> +#define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8)
> +#define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0)
> +
> +#define DSI_MAX_BUS_WIDTH 4
> +#define DSI_NUM_VIRTUAL_CHANNELS 4
> +#define DSI_TX_FIFO_SIZE 2048
> +#define DSI_RX_FIFO_SIZE 256
> +#define DSI_XFER_TIMEOUT_MS 100
> +#define DSI_RX_FIFO_EMPTY 0x30800002
> +
> +#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"
> +
> +static const char *const clk_names[5] = {
> + "bus_clk",
> + "sclk_mipi",
> + "phyclk_mipidphy0_bitclkdiv8",
> + "phyclk_mipidphy0_rxclkesc0",
> + "sclk_rgb_vclk_to_dsim0"
> +};
> +
> +enum samsung_dsim_transfer_type {
> + EXYNOS_DSI_TX,
> + EXYNOS_DSI_RX,
> +};
> +
> +enum reg_idx {
> + DSIM_STATUS_REG, /* Status register */
> + DSIM_SWRST_REG, /* Software reset register */
> + DSIM_CLKCTRL_REG, /* Clock control register */
> + DSIM_TIMEOUT_REG, /* Time out register */
> + DSIM_CONFIG_REG, /* Configuration register */
> + DSIM_ESCMODE_REG, /* Escape mode register */
> + DSIM_MDRESOL_REG,
> + DSIM_MVPORCH_REG, /* Main display Vporch register */
> + DSIM_MHPORCH_REG, /* Main display Hporch register */
> + DSIM_MSYNC_REG, /* Main display sync area register */
> + DSIM_INTSRC_REG, /* Interrupt source register */
> + DSIM_INTMSK_REG, /* Interrupt mask register */
> + DSIM_PKTHDR_REG, /* Packet Header FIFO register */
> + DSIM_PAYLOAD_REG, /* Payload FIFO register */
> + DSIM_RXFIFO_REG, /* Read FIFO register */
> + DSIM_FIFOCTRL_REG, /* FIFO status and control register */
> + DSIM_PLLCTRL_REG, /* PLL control register */
> + DSIM_PHYCTRL_REG,
> + DSIM_PHYTIMING_REG,
> + DSIM_PHYTIMING1_REG,
> + DSIM_PHYTIMING2_REG,
> + NUM_REGS
> +};
> +
> +static const unsigned int exynos_reg_ofs[] = {
> + [DSIM_STATUS_REG] = 0x00,
> + [DSIM_SWRST_REG] = 0x04,
> + [DSIM_CLKCTRL_REG] = 0x08,
> + [DSIM_TIMEOUT_REG] = 0x0c,
> + [DSIM_CONFIG_REG] = 0x10,
> + [DSIM_ESCMODE_REG] = 0x14,
> + [DSIM_MDRESOL_REG] = 0x18,
> + [DSIM_MVPORCH_REG] = 0x1c,
> + [DSIM_MHPORCH_REG] = 0x20,
> + [DSIM_MSYNC_REG] = 0x24,
> + [DSIM_INTSRC_REG] = 0x2c,
> + [DSIM_INTMSK_REG] = 0x30,
> + [DSIM_PKTHDR_REG] = 0x34,
> + [DSIM_PAYLOAD_REG] = 0x38,
> + [DSIM_RXFIFO_REG] = 0x3c,
> + [DSIM_FIFOCTRL_REG] = 0x44,
> + [DSIM_PLLCTRL_REG] = 0x4c,
> + [DSIM_PHYCTRL_REG] = 0x5c,
> + [DSIM_PHYTIMING_REG] = 0x64,
> + [DSIM_PHYTIMING1_REG] = 0x68,
> + [DSIM_PHYTIMING2_REG] = 0x6c,
> +};
> +
> +static const unsigned int exynos5433_reg_ofs[] = {
> + [DSIM_STATUS_REG] = 0x04,
> + [DSIM_SWRST_REG] = 0x0C,
> + [DSIM_CLKCTRL_REG] = 0x10,
> + [DSIM_TIMEOUT_REG] = 0x14,
> + [DSIM_CONFIG_REG] = 0x18,
> + [DSIM_ESCMODE_REG] = 0x1C,
> + [DSIM_MDRESOL_REG] = 0x20,
> + [DSIM_MVPORCH_REG] = 0x24,
> + [DSIM_MHPORCH_REG] = 0x28,
> + [DSIM_MSYNC_REG] = 0x2C,
> + [DSIM_INTSRC_REG] = 0x34,
> + [DSIM_INTMSK_REG] = 0x38,
> + [DSIM_PKTHDR_REG] = 0x3C,
> + [DSIM_PAYLOAD_REG] = 0x40,
> + [DSIM_RXFIFO_REG] = 0x44,
> + [DSIM_FIFOCTRL_REG] = 0x4C,
> + [DSIM_PLLCTRL_REG] = 0x94,
> + [DSIM_PHYCTRL_REG] = 0xA4,
> + [DSIM_PHYTIMING_REG] = 0xB4,
> + [DSIM_PHYTIMING1_REG] = 0xB8,
> + [DSIM_PHYTIMING2_REG] = 0xBC,
> +};
> +
> +enum reg_value_idx {
> + RESET_TYPE,
> + PLL_TIMER,
> + STOP_STATE_CNT,
> + PHYCTRL_ULPS_EXIT,
> + PHYCTRL_VREG_LP,
> + PHYCTRL_SLEW_UP,
> + PHYTIMING_LPX,
> + PHYTIMING_HS_EXIT,
> + PHYTIMING_CLK_PREPARE,
> + PHYTIMING_CLK_ZERO,
> + PHYTIMING_CLK_POST,
> + PHYTIMING_CLK_TRAIL,
> + PHYTIMING_HS_PREPARE,
> + PHYTIMING_HS_ZERO,
> + PHYTIMING_HS_TRAIL
> +};
> +
> +static const unsigned int reg_values[] = {
> + [RESET_TYPE] = DSIM_SWRST,
> + [PLL_TIMER] = 500,
> + [STOP_STATE_CNT] = 0xf,
> + [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
> + [PHYCTRL_VREG_LP] = 0,
> + [PHYCTRL_SLEW_UP] = 0,
> + [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
> + [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
> + [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
> + [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
> + [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
> + [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
> + [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
> + [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
> + [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
> +};
> +
> +static const unsigned int exynos5422_reg_values[] = {
> + [RESET_TYPE] = DSIM_SWRST,
> + [PLL_TIMER] = 500,
> + [STOP_STATE_CNT] = 0xf,
> + [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0xaf),
> + [PHYCTRL_VREG_LP] = 0,
> + [PHYCTRL_SLEW_UP] = 0,
> + [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x08),
> + [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0d),
> + [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
> + [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x30),
> + [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
> + [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x0a),
> + [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0c),
> + [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x11),
> + [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0d),
> +};
> +
> +static const unsigned int exynos5433_reg_values[] = {
> + [RESET_TYPE] = DSIM_FUNCRST,
> + [PLL_TIMER] = 22200,
> + [STOP_STATE_CNT] = 0xa,
> + [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190),
> + [PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP,
> + [PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP,
> + [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07),
> + [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c),
> + [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
> + [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d),
> + [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
> + [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09),
> + [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b),
> + [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10),
> + [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
> +};
> +
> +static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
> + .reg_ofs = exynos_reg_ofs,
> + .plltmr_reg = 0x50,
> + .has_freqband = 1,
> + .has_clklane_stop = 1,
> + .num_clks = 2,
> + .max_freq = 1000,
> + .wait_for_reset = 1,
> + .num_bits_resol = 11,
> + .reg_values = reg_values,
> +};
> +
> +static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
> + .reg_ofs = exynos_reg_ofs,
> + .plltmr_reg = 0x50,
> + .has_freqband = 1,
> + .has_clklane_stop = 1,
> + .num_clks = 2,
> + .max_freq = 1000,
> + .wait_for_reset = 1,
> + .num_bits_resol = 11,
> + .reg_values = reg_values,
> +};
> +
> +static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
> + .reg_ofs = exynos_reg_ofs,
> + .plltmr_reg = 0x58,
> + .num_clks = 2,
> + .max_freq = 1000,
> + .wait_for_reset = 1,
> + .num_bits_resol = 11,
> + .reg_values = reg_values,
> +};
> +
> +static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
> + .reg_ofs = exynos5433_reg_ofs,
> + .plltmr_reg = 0xa0,
> + .has_clklane_stop = 1,
> + .num_clks = 5,
> + .max_freq = 1500,
> + .wait_for_reset = 0,
> + .num_bits_resol = 12,
> + .reg_values = exynos5433_reg_values,
> +};
> +
> +static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
> + .reg_ofs = exynos5433_reg_ofs,
> + .plltmr_reg = 0xa0,
> + .has_clklane_stop = 1,
> + .num_clks = 2,
> + .max_freq = 1500,
> + .wait_for_reset = 1,
> + .num_bits_resol = 12,
> + .reg_values = exynos5422_reg_values,
> +};
> +
> +static const struct samsung_dsim_driver_data *
> +samsung_dsim_types[SAMSUNG_DSIM_TYPE_COUNT] = {
> + [SAMSUNG_DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
> + [SAMSUNG_DSIM_TYPE_EXYNOS4210] = &exynos4_dsi_driver_data,
> + [SAMSUNG_DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
> + [SAMSUNG_DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
> + [SAMSUNG_DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
> +};
> +
> +static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h)
> +{
> + return container_of(h, struct samsung_dsim, dsi_host);
> +}
> +
> +static inline struct samsung_dsim *bridge_to_dsi(struct drm_bridge *b)
> +{
> + return container_of(b, struct samsung_dsim, bridge);
> +}
> +
> +static inline void samsung_dsim_write(struct samsung_dsim *dsi,
> + enum reg_idx idx, u32 val)
> +{
> + writel(val, dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
> +}
> +
> +static inline u32 samsung_dsim_read(struct samsung_dsim *dsi, enum reg_idx
> idx)
> +{
> + return readl(dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
> +}
> +
> +static void samsung_dsim_wait_for_reset(struct samsung_dsim *dsi)
> +{
> + if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
> + return;
> +
> + dev_err(dsi->dev, "timeout waiting for reset\n");
> +}
> +
> +static void samsung_dsim_reset(struct samsung_dsim *dsi)
> +{
> + u32 reset_val = dsi->driver_data->reg_values[RESET_TYPE];
> +
> + reinit_completion(&dsi->completed);
> + samsung_dsim_write(dsi, DSIM_SWRST_REG, reset_val);
> +}
> +
> +#ifndef MHZ
> +#define MHZ (1000*1000)
> +#endif
> +
> +static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
> + unsigned long fin,
> + unsigned long fout,
> + u8 *p, u16 *m, u8 *s)
> +{
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + unsigned long best_freq = 0;
> + u32 min_delta = 0xffffffff;
> + u8 p_min, p_max;
> + u8 _p, best_p;
> + u16 _m, best_m;
> + u8 _s, best_s;
> +
> + p_min = DIV_ROUND_UP(fin, (12 * MHZ));
> + p_max = fin / (6 * MHZ);
> +
> + for (_p = p_min; _p <= p_max; ++_p) {
> + for (_s = 0; _s <= 5; ++_s) {
> + u64 tmp;
> + u32 delta;
> +
> + tmp = (u64)fout * (_p << _s);
> + do_div(tmp, fin);
> + _m = tmp;
> + if (_m < 41 || _m > 125)
> + continue;
> +
> + tmp = (u64)_m * fin;
> + do_div(tmp, _p);
> + if (tmp < 500 * MHZ ||
> + tmp > driver_data->max_freq * MHZ)
> + continue;
> +
> + tmp = (u64)_m * fin;
> + do_div(tmp, _p << _s);
> +
> + delta = abs(fout - tmp);
> + if (delta < min_delta) {
> + best_p = _p;
> + best_m = _m;
> + best_s = _s;
> + min_delta = delta;
> + best_freq = tmp;
> + }
> + }
> + }
> +
> + if (best_freq) {
> + *p = best_p;
> + *m = best_m;
> + *s = best_s;
> + }
> +
> + return best_freq;
> +}
> +
> +static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
> + unsigned long freq)
> +{
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + unsigned long fin, fout;
> + int timeout;
> + u8 p, s;
> + u16 m;
> + u32 reg;
> +
> + fin = dsi->pll_clk_rate;
> + fout = samsung_dsim_pll_find_pms(dsi, fin, freq, &p, &m, &s);
> + if (!fout) {
> + dev_err(dsi->dev,
> + "failed to find PLL PMS for requested frequency\n");
> + return 0;
> + }
> + dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
> +
> + writel(driver_data->reg_values[PLL_TIMER],
> + dsi->reg_base + driver_data->plltmr_reg);
> +
> + reg = DSIM_PLL_EN | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s);
> +
> + if (driver_data->has_freqband) {
> + static const unsigned long freq_bands[] = {
> + 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
> + 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
> + 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
> + 770 * MHZ, 870 * MHZ, 950 * MHZ,
> + };
> + int band;
> +
> + for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
> + if (fout < freq_bands[band])
> + break;
> +
> + dev_dbg(dsi->dev, "band %d\n", band);
> +
> + reg |= DSIM_FREQ_BAND(band);
> + }
> +
> + samsung_dsim_write(dsi, DSIM_PLLCTRL_REG, reg);
> +
> + timeout = 1000;
> + do {
> + if (timeout-- == 0) {
> + dev_err(dsi->dev, "PLL failed to stabilize\n");
> + return 0;
> + }
> + reg = samsung_dsim_read(dsi, DSIM_STATUS_REG);
> + } while ((reg & DSIM_PLL_STABLE) == 0);
> +
> + return fout;
> +}
> +
> +static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
> +{
> + unsigned long hs_clk, byte_clk, esc_clk;
> + unsigned long esc_div;
> + u32 reg;
> +
> + hs_clk = samsung_dsim_set_pll(dsi, dsi->burst_clk_rate);
> + if (!hs_clk) {
> + dev_err(dsi->dev, "failed to configure DSI PLL\n");
> + return -EFAULT;
> + }
> +
> + byte_clk = hs_clk / 8;
> + esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
> + esc_clk = byte_clk / esc_div;
> +
> + if (esc_clk > 20 * MHZ) {
> + ++esc_div;
> + esc_clk = byte_clk / esc_div;
> + }
> +
> + dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
> + hs_clk, byte_clk, esc_clk);
> +
> + reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
> + reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
> + | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
> + | DSIM_BYTE_CLK_SRC_MASK);
> + reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
> + | DSIM_ESC_PRESCALER(esc_div)
> + | DSIM_LANE_ESC_CLK_EN_CLK
> + | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
> + | DSIM_BYTE_CLK_SRC(0)
> + | DSIM_TX_REQUEST_HSCLK;
> + samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
> +
> + return 0;
> +}
> +
> +static void samsung_dsim_set_phy_ctrl(struct samsung_dsim *dsi)
> +{
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + const unsigned int *reg_values = driver_data->reg_values;
> + u32 reg;
> +
> + if (driver_data->has_freqband)
> + return;
> +
> + /* B D-PHY: D-PHY Master & Slave Analog Block control */
> + reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
> + reg_values[PHYCTRL_SLEW_UP];
> + samsung_dsim_write(dsi, DSIM_PHYCTRL_REG, reg);
> +
> + /*
> + * T LPX: Transmitted length of any Low-Power state period
> + * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
> + * burst
> + */
> + reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
> + samsung_dsim_write(dsi, DSIM_PHYTIMING_REG, reg);
> +
> + /*
> + * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
> + * Line state immediately before the HS-0 Line state starting the
> + * HS transmission
> + * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
> + * transmitting the Clock.
> + * T CLK_POST: Time that the transmitter continues to send HS clock
> + * after the last associated Data Lane has transitioned to LP Mode
> + * Interval is defined as the period from the end of T HS-TRAIL to
> + * the beginning of T CLK-TRAIL
> + * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
> + * the last payload clock bit of a HS transmission burst
> + */
> + reg = reg_values[PHYTIMING_CLK_PREPARE] |
> + reg_values[PHYTIMING_CLK_ZERO] |
> + reg_values[PHYTIMING_CLK_POST] |
> + reg_values[PHYTIMING_CLK_TRAIL];
> +
> + samsung_dsim_write(dsi, DSIM_PHYTIMING1_REG, reg);
> +
> + /*
> + * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
> + * Line state immediately before the HS-0 Line state starting the
> + * HS transmission
> + * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
> + * transmitting the Sync sequence.
> + * T HS-TRAIL: Time that the transmitter drives the flipped differential
> + * state after last payload data bit of a HS transmission burst
> + */
> + reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
> + reg_values[PHYTIMING_HS_TRAIL];
> + samsung_dsim_write(dsi, DSIM_PHYTIMING2_REG, reg);
> +}
> +
> +static void samsung_dsim_disable_clock(struct samsung_dsim *dsi)
> +{
> + u32 reg;
> +
> + reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
> + reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
> + | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
> + samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
> +
> + reg = samsung_dsim_read(dsi, DSIM_PLLCTRL_REG);
> + reg &= ~DSIM_PLL_EN;
> + samsung_dsim_write(dsi, DSIM_PLLCTRL_REG, reg);
> +}
> +
> +static void samsung_dsim_enable_lane(struct samsung_dsim *dsi, u32 lane)
> +{
> + u32 reg = samsung_dsim_read(dsi, DSIM_CONFIG_REG);
> +
> + reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK |
> + DSIM_LANE_EN(lane));
> + samsung_dsim_write(dsi, DSIM_CONFIG_REG, reg);
> +}
> +
> +static int samsung_dsim_init_link(struct samsung_dsim *dsi)
> +{
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + int timeout;
> + u32 reg;
> + u32 lanes_mask;
> +
> + /* Initialize FIFO pointers */
> + reg = samsung_dsim_read(dsi, DSIM_FIFOCTRL_REG);
> + reg &= ~0x1f;
> + samsung_dsim_write(dsi, DSIM_FIFOCTRL_REG, reg);
> +
> + usleep_range(9000, 11000);
> +
> + reg |= 0x1f;
> + samsung_dsim_write(dsi, DSIM_FIFOCTRL_REG, reg);
> + usleep_range(9000, 11000);
> +
> + /* DSI configuration */
> + reg = 0;
> +
> + /*
> + * The first bit of mode_flags specifies display configuration.
> + * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
> + * mode, otherwise it will support command mode.
> + */
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
> + reg |= DSIM_VIDEO_MODE;
> +
> + /*
> + * The user manual describes that following bits are ignored in
> + * command mode.
> + */
> + if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH))
> + reg |= DSIM_MFLUSH_VS;
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
> + reg |= DSIM_SYNC_INFORM;
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> + reg |= DSIM_BURST_MODE;
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT)
> + reg |= DSIM_AUTO_MODE;
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE)
> + reg |= DSIM_HSE_MODE;
> + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HFP))
> + reg |= DSIM_HFP_MODE;
> + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HBP))
> + reg |= DSIM_HBP_MODE;
> + if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HSA))
> + reg |= DSIM_HSA_MODE;
> + }
> +
> + if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
> + reg |= DSIM_EOT_DISABLE;
> +
> + switch (dsi->format) {
> + case MIPI_DSI_FMT_RGB888:
> + reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
> + break;
> + case MIPI_DSI_FMT_RGB666:
> + reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
> + break;
> + case MIPI_DSI_FMT_RGB666_PACKED:
> + reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
> + break;
> + case MIPI_DSI_FMT_RGB565:
> + reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
> + break;
> + default:
> + dev_err(dsi->dev, "invalid pixel format\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * Use non-continuous clock mode if the periparal wants and
> + * host controller supports
> + *
> + * In non-continous clock mode, host controller will turn off
> + * the HS clock between high-speed transmissions to reduce
> + * power consumption.
> + */
> + if (driver_data->has_clklane_stop &&
> + dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
> + reg |= DSIM_CLKLANE_STOP;
> + }
> + samsung_dsim_write(dsi, DSIM_CONFIG_REG, reg);
> +
> + lanes_mask = BIT(dsi->lanes) - 1;
> + samsung_dsim_enable_lane(dsi, lanes_mask);
> +
> + /* Check clock and data lane state are stop state */
> + timeout = 100;
> + do {
> + if (timeout-- == 0) {
> + dev_err(dsi->dev, "waiting for bus lanes timed out\n");
> + return -EFAULT;
> + }
> +
> + reg = samsung_dsim_read(dsi, DSIM_STATUS_REG);
> + if ((reg & DSIM_STOP_STATE_DAT(lanes_mask))
> + != DSIM_STOP_STATE_DAT(lanes_mask))
> + continue;
> + } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));
> +
> + reg = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
> + reg &= ~DSIM_STOP_STATE_CNT_MASK;
> + reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
> + samsung_dsim_write(dsi, DSIM_ESCMODE_REG, reg);
> +
> + reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
> + samsung_dsim_write(dsi, DSIM_TIMEOUT_REG, reg);
> +
> + return 0;
> +}
> +
> +static void samsung_dsim_set_display_mode(struct samsung_dsim *dsi)
> +{
> + struct drm_display_mode *m = &dsi->mode;
> + unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
> + u32 reg;
> +
> + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
> + reg = DSIM_CMD_ALLOW(0xf)
> + | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay)
> + | DSIM_MAIN_VBP(m->vtotal - m->vsync_end);
> + samsung_dsim_write(dsi, DSIM_MVPORCH_REG, reg);
> +
> + reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay)
> + | DSIM_MAIN_HBP(m->htotal - m->hsync_end);
> + samsung_dsim_write(dsi, DSIM_MHPORCH_REG, reg);
> +
> + reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start)
> + | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start);
> + samsung_dsim_write(dsi, DSIM_MSYNC_REG, reg);
> + }
> + reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
> + DSIM_MAIN_VRESOL(m->vdisplay, num_bits_resol);
> +
> + samsung_dsim_write(dsi, DSIM_MDRESOL_REG, reg);
> +
> + dev_dbg(dsi->dev, "LCD size = %dx%d\n", m->hdisplay, m->vdisplay);
> +}
> +
> +static void samsung_dsim_set_display_enable(struct samsung_dsim *dsi, bool
> enable)
> +{
> + u32 reg;
> +
> + reg = samsung_dsim_read(dsi, DSIM_MDRESOL_REG);
> + if (enable)
> + reg |= DSIM_MAIN_STAND_BY;
> + else
> + reg &= ~DSIM_MAIN_STAND_BY;
> + samsung_dsim_write(dsi, DSIM_MDRESOL_REG, reg);
> +}
> +
> +static int samsung_dsim_wait_for_hdr_fifo(struct samsung_dsim *dsi)
> +{
> + int timeout = 2000;
> +
> + do {
> + u32 reg = samsung_dsim_read(dsi, DSIM_FIFOCTRL_REG);
> +
> + if (!(reg & DSIM_SFR_HEADER_FULL))
> + return 0;
> +
> + if (!cond_resched())
> + usleep_range(950, 1050);
> + } while (--timeout);
> +
> + return -ETIMEDOUT;
> +}
> +
> +static void samsung_dsim_set_cmd_lpm(struct samsung_dsim *dsi, bool lpm)
> +{
> + u32 v = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
> +
> + if (lpm)
> + v |= DSIM_CMD_LPDT_LP;
> + else
> + v &= ~DSIM_CMD_LPDT_LP;
> +
> + samsung_dsim_write(dsi, DSIM_ESCMODE_REG, v);
> +}
> +
> +static void samsung_dsim_force_bta(struct samsung_dsim *dsi)
> +{
> + u32 v = samsung_dsim_read(dsi, DSIM_ESCMODE_REG);
> +
> + v |= DSIM_FORCE_BTA;
> + samsung_dsim_write(dsi, DSIM_ESCMODE_REG, v);
> +}
> +
> +static void samsung_dsim_send_to_fifo(struct samsung_dsim *dsi,
> + struct samsung_dsim_transfer *xfer)
> +{
> + struct device *dev = dsi->dev;
> + struct mipi_dsi_packet *pkt = &xfer->packet;
> + const u8 *payload = pkt->payload + xfer->tx_done;
> + u16 length = pkt->payload_length - xfer->tx_done;
> + bool first = !xfer->tx_done;
> + u32 reg;
> +
> + dev_dbg(dev, "< xfer %pK: tx len %u, done %u, rx len %u, done %u\n",
> + xfer, length, xfer->tx_done, xfer->rx_len, xfer->rx_done);
> +
> + if (length > DSI_TX_FIFO_SIZE)
> + length = DSI_TX_FIFO_SIZE;
> +
> + xfer->tx_done += length;
> +
> + /* Send payload */
> + while (length >= 4) {
> + reg = get_unaligned_le32(payload);
> + samsung_dsim_write(dsi, DSIM_PAYLOAD_REG, reg);
> + payload += 4;
> + length -= 4;
> + }
> +
> + reg = 0;
> + switch (length) {
> + case 3:
> + reg |= payload[2] << 16;
> + fallthrough;
> + case 2:
> + reg |= payload[1] << 8;
> + fallthrough;
> + case 1:
> + reg |= payload[0];
> + samsung_dsim_write(dsi, DSIM_PAYLOAD_REG, reg);
> + break;
> + }
> +
> + /* Send packet header */
> + if (!first)
> + return;
> +
> + reg = get_unaligned_le32(pkt->header);
> + if (samsung_dsim_wait_for_hdr_fifo(dsi)) {
> + dev_err(dev, "waiting for header FIFO timed out\n");
> + return;
> + }
> +
> + if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM,
> + dsi->state & DSIM_STATE_CMD_LPM)) {
> + samsung_dsim_set_cmd_lpm(dsi, xfer->flags &
> MIPI_DSI_MSG_USE_LPM);
> + dsi->state ^= DSIM_STATE_CMD_LPM;
> + }
> +
> + samsung_dsim_write(dsi, DSIM_PKTHDR_REG, reg);
> +
> + if (xfer->flags & MIPI_DSI_MSG_REQ_ACK)
> + samsung_dsim_force_bta(dsi);
> +}
> +
> +static void samsung_dsim_read_from_fifo(struct samsung_dsim *dsi,
> + struct samsung_dsim_transfer *xfer)
> +{
> + u8 *payload = xfer->rx_payload + xfer->rx_done;
> + bool first = !xfer->rx_done;
> + struct device *dev = dsi->dev;
> + u16 length;
> + u32 reg;
> +
> + if (first) {
> + reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
> +
> + switch (reg & 0x3f) {
> + case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
> + case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
> + if (xfer->rx_len >= 2) {
> + payload[1] = reg >> 16;
> + ++xfer->rx_done;
> + }
> + fallthrough;
> + case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
> + case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
> + payload[0] = reg >> 8;
> + ++xfer->rx_done;
> + xfer->rx_len = xfer->rx_done;
> + xfer->result = 0;
> + goto clear_fifo;
> + case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
> + dev_err(dev, "DSI Error Report: 0x%04x\n", (reg >> 8) &
> 0xffff);
> + xfer->result = 0;
> + goto clear_fifo;
> + }
> +
> + length = (reg >> 8) & 0xffff;
> + if (length > xfer->rx_len) {
> + dev_err(dev,
> + "response too long (%u > %u bytes),
> stripping\n",
> + xfer->rx_len, length);
> + length = xfer->rx_len;
> + } else if (length < xfer->rx_len)
> + xfer->rx_len = length;
> + }
> +
> + length = xfer->rx_len - xfer->rx_done;
> + xfer->rx_done += length;
> +
> + /* Receive payload */
> + while (length >= 4) {
> + reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
> + payload[0] = (reg >> 0) & 0xff;
> + payload[1] = (reg >> 8) & 0xff;
> + payload[2] = (reg >> 16) & 0xff;
> + payload[3] = (reg >> 24) & 0xff;
> + payload += 4;
> + length -= 4;
> + }
> +
> + if (length) {
> + reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
> + switch (length) {
> + case 3:
> + payload[2] = (reg >> 16) & 0xff;
> + fallthrough;
> + case 2:
> + payload[1] = (reg >> 8) & 0xff;
> + fallthrough;
> + case 1:
> + payload[0] = reg & 0xff;
> + }
> + }
> +
> + if (xfer->rx_done == xfer->rx_len)
> + xfer->result = 0;
> +
> +clear_fifo:
> + length = DSI_RX_FIFO_SIZE / 4;
> + do {
> + reg = samsung_dsim_read(dsi, DSIM_RXFIFO_REG);
> + if (reg == DSI_RX_FIFO_EMPTY)
> + break;
> + } while (--length);
> +}
> +
> +static void samsung_dsim_transfer_start(struct samsung_dsim *dsi)
> +{
> + unsigned long flags;
> + struct samsung_dsim_transfer *xfer;
> + bool start = false;
> +
> +again:
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + if (list_empty(&dsi->transfer_list)) {
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> + return;
> + }
> +
> + xfer = list_first_entry(&dsi->transfer_list,
> + struct samsung_dsim_transfer, list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +
> + if (xfer->packet.payload_length &&
> + xfer->tx_done == xfer->packet.payload_length)
> + /* waiting for RX */
> + return;
> +
> + samsung_dsim_send_to_fifo(dsi, xfer);
> +
> + if (xfer->packet.payload_length || xfer->rx_len)
> + return;
> +
> + xfer->result = 0;
> + complete(&xfer->completed);
> +
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + list_del_init(&xfer->list);
> + start = !list_empty(&dsi->transfer_list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +
> + if (start)
> + goto again;
> +}
> +
> +static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi)
> +{
> + struct samsung_dsim_transfer *xfer;
> + unsigned long flags;
> + bool start = true;
> +
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + if (list_empty(&dsi->transfer_list)) {
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> + return false;
> + }
> +
> + xfer = list_first_entry(&dsi->transfer_list,
> + struct samsung_dsim_transfer, list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +
> + dev_dbg(dsi->dev,
> + "> xfer %pK, tx_len %zu, tx_done %u, rx_len %u, rx_done %u\n",
> + xfer, xfer->packet.payload_length, xfer->tx_done, xfer->rx_len,
> + xfer->rx_done);
> +
> + if (xfer->tx_done != xfer->packet.payload_length)
> + return true;
> +
> + if (xfer->rx_done != xfer->rx_len)
> + samsung_dsim_read_from_fifo(dsi, xfer);
> +
> + if (xfer->rx_done != xfer->rx_len)
> + return true;
> +
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + list_del_init(&xfer->list);
> + start = !list_empty(&dsi->transfer_list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +
> + if (!xfer->rx_len)
> + xfer->result = 0;
> + complete(&xfer->completed);
> +
> + return start;
> +}
> +
> +static void samsung_dsim_remove_transfer(struct samsung_dsim *dsi,
> + struct samsung_dsim_transfer *xfer)
> +{
> + unsigned long flags;
> + bool start;
> +
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + if (!list_empty(&dsi->transfer_list) &&
> + xfer == list_first_entry(&dsi->transfer_list,
> + struct samsung_dsim_transfer, list)) {
> + list_del_init(&xfer->list);
> + start = !list_empty(&dsi->transfer_list);
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> + if (start)
> + samsung_dsim_transfer_start(dsi);
> + return;
> + }
> +
> + list_del_init(&xfer->list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +}
> +
> +static int samsung_dsim_transfer(struct samsung_dsim *dsi,
> + struct samsung_dsim_transfer *xfer)
> +{
> + unsigned long flags;
> + bool stopped;
> +
> + xfer->tx_done = 0;
> + xfer->rx_done = 0;
> + xfer->result = -ETIMEDOUT;
> + init_completion(&xfer->completed);
> +
> + spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> + stopped = list_empty(&dsi->transfer_list);
> + list_add_tail(&xfer->list, &dsi->transfer_list);
> +
> + spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> +
> + if (stopped)
> + samsung_dsim_transfer_start(dsi);
> +
> + wait_for_completion_timeout(&xfer->completed,
> + msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
> + if (xfer->result == -ETIMEDOUT) {
> + struct mipi_dsi_packet *pkt = &xfer->packet;
> +
> + samsung_dsim_remove_transfer(dsi, xfer);
> + dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 4, pkt->header,
> + (int)pkt->payload_length, pkt->payload);
> + return -ETIMEDOUT;
> + }
> +
> + /* Also covers hardware timeout condition */
> + return xfer->result;
> +}
> +
> +static irqreturn_t samsung_dsim_irq(int irq, void *dev_id)
> +{
> + struct samsung_dsim *dsi = dev_id;
> + u32 status;
> +
> + status = samsung_dsim_read(dsi, DSIM_INTSRC_REG);
> + if (!status) {
> + static unsigned long j;
> +
> + if (printk_timed_ratelimit(&j, 500))
> + dev_warn(dsi->dev, "spurious interrupt\n");
> + return IRQ_HANDLED;
> + }
> + samsung_dsim_write(dsi, DSIM_INTSRC_REG, status);
> +
> + if (status & DSIM_INT_SW_RST_RELEASE) {
> + u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
> + DSIM_INT_SFR_HDR_FIFO_EMPTY | DSIM_INT_RX_ECC_ERR |
> + DSIM_INT_SW_RST_RELEASE);
> + samsung_dsim_write(dsi, DSIM_INTMSK_REG, mask);
> + complete(&dsi->completed);
> + return IRQ_HANDLED;
> + }
> +
> + if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
> + DSIM_INT_PLL_STABLE)))
> + return IRQ_HANDLED;
> +
> + if (samsung_dsim_transfer_finish(dsi))
> + samsung_dsim_transfer_start(dsi);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void samsung_dsim_enable_irq(struct samsung_dsim *dsi)
> +{
> + const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
> +
> + enable_irq(dsi->irq);
> +
> + if (pdata->irq_ops && pdata->irq_ops->enable)
> + pdata->irq_ops->enable(dsi);
> +}
> +
> +static void samsung_dsim_disable_irq(struct samsung_dsim *dsi)
> +{
> + const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
> +
> + if (pdata->irq_ops && pdata->irq_ops->disable)
> + pdata->irq_ops->disable(dsi);
> +
> + disable_irq(dsi->irq);
> +}
> +
> +static int samsung_dsim_init(struct samsung_dsim *dsi)
> +{
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> +
> + samsung_dsim_reset(dsi);
> + samsung_dsim_enable_irq(dsi);
> +
> + if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST)
> + samsung_dsim_enable_lane(dsi, BIT(dsi->lanes) - 1);
> +
> + samsung_dsim_enable_clock(dsi);
> + if (driver_data->wait_for_reset)
> + samsung_dsim_wait_for_reset(dsi);
> + samsung_dsim_set_phy_ctrl(dsi);
> + samsung_dsim_init_link(dsi);
> +
> + return 0;
> +}
> +
> +static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge,
> + struct drm_bridge_state
> *old_bridge_state)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> + int ret;
> +
> + if (dsi->state & DSIM_STATE_ENABLED)
> + return;
> +
> + ret = pm_runtime_resume_and_get(dsi->dev);
> + if (ret < 0) {
> + dev_err(dsi->dev, "failed to enable DSI device.\n");
> + return;
> + }
> +
> + dsi->state |= DSIM_STATE_ENABLED;
> +}
> +
> +static void samsung_dsim_atomic_enable(struct drm_bridge *bridge,
> + struct drm_bridge_state
> *old_bridge_state)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> +
> + samsung_dsim_set_display_mode(dsi);
> + samsung_dsim_set_display_enable(dsi, true);
> +
> + dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
> +}
> +
> +static void samsung_dsim_atomic_disable(struct drm_bridge *bridge,
> + struct drm_bridge_state
> *old_bridge_state)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> +
> + if (!(dsi->state & DSIM_STATE_ENABLED))
> + return;
> +
> + dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
> +}
> +
> +static void samsung_dsim_atomic_post_disable(struct drm_bridge *bridge,
> + struct drm_bridge_state
> *old_bridge_state)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> +
> + samsung_dsim_set_display_enable(dsi, false);
> +
> + dsi->state &= ~DSIM_STATE_ENABLED;
> + pm_runtime_put_sync(dsi->dev);
> +}
> +
> +static void samsung_dsim_mode_set(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> +
> + drm_mode_copy(&dsi->mode, adjusted_mode);
> +}
> +
> +static int samsung_dsim_attach(struct drm_bridge *bridge,
> + enum drm_bridge_attach_flags flags)
> +{
> + struct samsung_dsim *dsi = bridge_to_dsi(bridge);
> + struct drm_bridge *previous = bridge;
> +
> + /**
> + * FIXME:
> + * This has to remove once the bridge chain order is compatible
> + * with Exynos DSI drivers.
> + *
> + * DRM bridge chain ordering is not compatible with Exynos DSI
> + * drivers because DSI sink devices typically want the DSI host
> + * powered up and configured before they are powered up.
> + *
> + * Passing NULL to the previous bridge makes Exynos DSI drivers
> + * work which is exactly done before.
> + */
> + if (!(dsi->plat_data->hw_type & SAMSUNG_DSIM_TYPE_IMX8MM))
The above should be 'if (!(dsi->plat_data->hw_type ==
SAMSUNG_DSIM_TYPE_IMX8MM))', hw_type is not a bitmask. Also
SAMSUNG_DSIM_TYPE_IMX8MM is not yet defined in this patch, so this it breaks
builds.
> + previous = NULL;
> +
> + return drm_bridge_attach(bridge->encoder, dsi->out_bridge, previous,
> + flags);
> +}
> +
> +static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = {
> + .atomic_duplicate_state =
> drm_atomic_helper_bridge_duplicate_state,
> + .atomic_destroy_state =
> drm_atomic_helper_bridge_destroy_state,
> + .atomic_reset = drm_atomic_helper_bridge_reset,
> + .atomic_pre_enable = samsung_dsim_atomic_pre_enable,
> + .atomic_enable = samsung_dsim_atomic_enable,
> + .atomic_disable = samsung_dsim_atomic_disable,
> + .atomic_post_disable = samsung_dsim_atomic_post_disable,
> + .mode_set = samsung_dsim_mode_set,
> + .attach = samsung_dsim_attach,
> +};
> +
> +static int samsung_dsim_host_attach(struct mipi_dsi_host *host,
> + struct mipi_dsi_device *device)
> +{
> + struct samsung_dsim *dsi = host_to_dsi(host);
> + const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
> + struct device *dev = dsi->dev;
> + struct drm_panel *panel;
> + int ret;
> +
> + panel = of_drm_find_panel(device->dev.of_node);
> + if (!IS_ERR(panel)) {
> + dsi->out_bridge = devm_drm_panel_bridge_add(dev, panel);
> + } else {
> + dsi->out_bridge = of_drm_find_bridge(device->dev.of_node);
> + if (!dsi->out_bridge)
> + dsi->out_bridge = ERR_PTR(-EINVAL);
> + }
> +
> + if (IS_ERR(dsi->out_bridge)) {
> + ret = PTR_ERR(dsi->out_bridge);
> + DRM_DEV_ERROR(dev, "failed to find the bridge: %d\n", ret);
> + return ret;
> + }
> +
> + DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
> +
> + drm_bridge_add(&dsi->bridge);
> +
> + if (pdata->host_ops && pdata->host_ops->attach) {
> + ret = pdata->host_ops->attach(dsi, device);
> + if (ret < 0)
> + return ret;
> + }
> +
> + dsi->lanes = device->lanes;
> + dsi->format = device->format;
> + dsi->mode_flags = device->mode_flags;
> +
> + return 0;
> +}
> +
> +static int samsung_dsim_host_detach(struct mipi_dsi_host *host,
> + struct mipi_dsi_device *device)
> +{
> + struct samsung_dsim *dsi = host_to_dsi(host);
> + const struct samsung_dsim_plat_data *pdata = dsi->plat_data;
> + int ret;
> +
> + if (dsi->out_bridge->funcs->detach)
> + dsi->out_bridge->funcs->detach(dsi->out_bridge);
> +
> + dsi->out_bridge = NULL;
> +
> + if (pdata->host_ops && pdata->host_ops->detach) {
> + ret = pdata->host_ops->detach(dsi, device);
> + if (ret < 0)
> + return ret;
> + }
> +
> + drm_bridge_remove(&dsi->bridge);
> +
> + return 0;
> +}
> +
> +static ssize_t samsung_dsim_host_transfer(struct mipi_dsi_host *host,
> + const struct mipi_dsi_msg *msg)
> +{
> + struct samsung_dsim *dsi = host_to_dsi(host);
> + struct samsung_dsim_transfer xfer;
> + int ret;
> +
> + if (!(dsi->state & DSIM_STATE_ENABLED))
> + return -EINVAL;
> +
> + if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
> + ret = samsung_dsim_init(dsi);
> + if (ret)
> + return ret;
> + dsi->state |= DSIM_STATE_INITIALIZED;
> + }
> +
> + ret = mipi_dsi_create_packet(&xfer.packet, msg);
> + if (ret < 0)
> + return ret;
> +
> + xfer.rx_len = msg->rx_len;
> + xfer.rx_payload = msg->rx_buf;
> + xfer.flags = msg->flags;
> +
> + ret = samsung_dsim_transfer(dsi, &xfer);
> + return (ret < 0) ? ret : xfer.rx_done;
> +}
> +
> +static const struct mipi_dsi_host_ops samsung_dsim_ops = {
> + .attach = samsung_dsim_host_attach,
> + .detach = samsung_dsim_host_detach,
> + .transfer = samsung_dsim_host_transfer,
> +};
> +
> +static int samsung_dsim_of_read_u32(const struct device_node *np,
> + const char *propname, u32 *out_value)
> +{
> + int ret = of_property_read_u32(np, propname, out_value);
> +
> + if (ret < 0)
> + pr_err("%pOF: failed to get '%s' property\n", np, propname);
> +
> + return ret;
> +}
> +
> +static int samsung_dsim_parse_dt(struct samsung_dsim *dsi)
> +{
> + struct device *dev = dsi->dev;
> + struct device_node *node = dev->of_node;
> + int ret;
> +
> + ret = samsung_dsim_of_read_u32(node, "samsung,pll-clock-frequency",
> + &dsi->pll_clk_rate);
> + if (ret < 0)
> + return ret;
> +
> + ret = samsung_dsim_of_read_u32(node, "samsung,burst-clock-frequency",
> + &dsi->burst_clk_rate);
> + if (ret < 0)
> + return ret;
> +
> + ret = samsung_dsim_of_read_u32(node, "samsung,esc-clock-frequency",
> + &dsi->esc_clk_rate);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int samsung_dsim_register_host(struct samsung_dsim *dsi)
> +{
> + return mipi_dsi_host_register(&dsi->dsi_host);
> +}
> +
> +static void samsung_dsim_unregister_host(struct samsung_dsim *dsi)
> +{
> + mipi_dsi_host_unregister(&dsi->dsi_host);
> +}
> +
> +static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = {
> + .register_host = samsung_dsim_register_host,
> + .unregister_host = samsung_dsim_unregister_host,
> +};
> +
> +int samsung_dsim_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct samsung_dsim *dsi;
> + int ret, i;
> +
> + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> + if (!dsi)
> + return -ENOMEM;
> +
> + init_completion(&dsi->completed);
> + spin_lock_init(&dsi->transfer_lock);
> + INIT_LIST_HEAD(&dsi->transfer_list);
> +
> + dsi->dsi_host.ops = &samsung_dsim_ops;
> + dsi->dsi_host.dev = dev;
> +
> + dsi->dev = dev;
> + dsi->plat_data = of_device_get_match_data(dev);
> + dsi->driver_data = samsung_dsim_types[dsi->plat_data->hw_type];
> +
> + dsi->supplies[0].supply = "vddcore";
> + dsi->supplies[1].supply = "vddio";
> + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies),
> + dsi->supplies);
> + if (ret)
> + return dev_err_probe(dev, ret, "failed to get regulators\n");
> +
> + dsi->clks = devm_kcalloc(dev, dsi->driver_data->num_clks,
> + sizeof(*dsi->clks), GFP_KERNEL);
> + if (!dsi->clks)
> + return -ENOMEM;
> +
> + for (i = 0; i < dsi->driver_data->num_clks; i++) {
> + dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
> + if (IS_ERR(dsi->clks[i])) {
> + if (strcmp(clk_names[i], "sclk_mipi") == 0) {
> + dsi->clks[i] = devm_clk_get(dev,
> OLD_SCLK_MIPI_CLK_NAME);
> + if (!IS_ERR(dsi->clks[i]))
> + continue;
> + }
> +
> + dev_info(dev, "failed to get the clock: %s\n",
> clk_names[i]);
> + return PTR_ERR(dsi->clks[i]);
> + }
> + }
> +
> + dsi->reg_base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(dsi->reg_base))
> + return PTR_ERR(dsi->reg_base);
> +
> + dsi->phy = devm_phy_get(dev, "dsim");
> + if (IS_ERR(dsi->phy)) {
> + dev_info(dev, "failed to get dsim phy\n");
> + return PTR_ERR(dsi->phy);
> + }
> +
> + dsi->irq = platform_get_irq(pdev, 0);
> + if (dsi->irq < 0)
> + return dsi->irq;
> +
> + ret = devm_request_threaded_irq(dev, dsi->irq, NULL,
> + samsung_dsim_irq,
> + IRQF_ONESHOT | IRQF_NO_AUTOEN,
> + dev_name(dev), dsi);
> + if (ret) {
> + dev_err(dev, "failed to request dsi irq\n");
> + return ret;
> + }
> +
> + ret = samsung_dsim_parse_dt(dsi);
> + if (ret)
> + return ret;
> +
> + platform_set_drvdata(pdev, dsi);
> +
> + pm_runtime_enable(dev);
> +
> + dsi->bridge.funcs = &samsung_dsim_bridge_funcs;
> + dsi->bridge.of_node = dev->of_node;
> + dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
> +
> + if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host)
> + ret = dsi->plat_data->host_ops->register_host(dsi);
> +
> + if (ret)
> + goto err_disable_runtime;
> +
> + return 0;
> +
> +err_disable_runtime:
> + pm_runtime_disable(dev);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(samsung_dsim_probe);
> +
> +int samsung_dsim_remove(struct platform_device *pdev)
> +{
> + struct samsung_dsim *dsi = platform_get_drvdata(pdev);
> +
> + pm_runtime_disable(&pdev->dev);
> +
> + if (dsi->plat_data->host_ops &&
> dsi->plat_data->host_ops->unregister_host)
> + dsi->plat_data->host_ops->unregister_host(dsi);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(samsung_dsim_remove);
> +
> +static int __maybe_unused samsung_dsim_suspend(struct device *dev)
> +{
> + struct samsung_dsim *dsi = dev_get_drvdata(dev);
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + int ret, i;
> +
> + usleep_range(10000, 20000);
> +
> + if (dsi->state & DSIM_STATE_INITIALIZED) {
> + dsi->state &= ~DSIM_STATE_INITIALIZED;
> +
> + samsung_dsim_disable_clock(dsi);
> +
> + samsung_dsim_disable_irq(dsi);
> + }
> +
> + dsi->state &= ~DSIM_STATE_CMD_LPM;
> +
> + phy_power_off(dsi->phy);
> +
> + for (i = driver_data->num_clks - 1; i > -1; i--)
> + clk_disable_unprepare(dsi->clks[i]);
> +
> + ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> + if (ret < 0)
> + dev_err(dsi->dev, "cannot disable regulators %d\n", ret);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused samsung_dsim_resume(struct device *dev)
> +{
> + struct samsung_dsim *dsi = dev_get_drvdata(dev);
> + const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
> + int ret, i;
> +
> + ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> + if (ret < 0) {
> + dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
> + return ret;
> + }
> +
> + for (i = 0; i < driver_data->num_clks; i++) {
> + ret = clk_prepare_enable(dsi->clks[i]);
> + if (ret < 0)
> + goto err_clk;
> + }
> +
> + ret = phy_power_on(dsi->phy);
> + if (ret < 0) {
> + dev_err(dsi->dev, "cannot enable phy %d\n", ret);
> + goto err_clk;
> + }
> +
> + return 0;
> +
> +err_clk:
> + while (--i > -1)
> + clk_disable_unprepare(dsi->clks[i]);
> + regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> +
> + return ret;
> +}
> +
> +const struct dev_pm_ops samsung_dsim_pm_ops = {
> + SET_RUNTIME_PM_OPS(samsung_dsim_suspend, samsung_dsim_resume, NULL)
> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> + pm_runtime_force_resume)
> +};
> +EXPORT_SYMBOL_GPL(samsung_dsim_pm_ops);
> +
> +static const struct of_device_id samsung_dsim_of_match[] = {
> + { /* sentinel. */ }
> +};
> +MODULE_DEVICE_TABLE(of, samsung_dsim_of_match);
> +
> +static struct platform_driver samsung_dsim_driver = {
> + .probe = samsung_dsim_probe,
> + .remove = samsung_dsim_remove,
> + .driver = {
> + .name = "samsung-dsim",
> + .owner = THIS_MODULE,
> + .pm = &samsung_dsim_pm_ops,
> + .of_match_table = samsung_dsim_of_match,
> + },
> +};
> +
> +module_platform_driver(samsung_dsim_driver);
> +
> +MODULE_AUTHOR("Jagan Teki <ja...@amarulasolutions.com>");
> +MODULE_DESCRIPTION("Samsung MIPI DSIM controller bridge");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
> index 3d2f025d4fd4..a65acfed15b9 100644
> --- a/drivers/gpu/drm/exynos/Kconfig
> +++ b/drivers/gpu/drm/exynos/Kconfig
> @@ -59,6 +59,7 @@ config DRM_EXYNOS_DSI
> depends on DRM_EXYNOS_FIMD || DRM_EXYNOS5433_DECON || DRM_EXYNOS7_DECON
> select DRM_MIPI_DSI
> select DRM_PANEL
> + select DRM_SAMSUNG_DSIM
> default n
> help
> This enables support for Exynos MIPI-DSI device.
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index ec673223d6b7..eac52f438d04 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1,1351 +1,83 @@
> // SPDX-License-Identifier: GPL-2.0-only
> /*
> - * Samsung SoC MIPI DSI Master driver.
> + * Samsung MIPI DSIM glue for Exynos SoCs.
> *
> * Copyright (c) 2014 Samsung Electronics Co., Ltd
> *
> * Contacts: Tomasz Figa <t.f...@samsung.com>
> -*/
> + */
>
> -#include <linux/clk.h>
> -#include <linux/delay.h>
> #include <linux/component.h>
> #include <linux/gpio/consumer.h>
> -#include <linux/irq.h>
> #include <linux/of_device.h>
> -#include <linux/of_graph.h>
> -#include <linux/phy/phy.h>
> -#include <linux/regulator/consumer.h>
>
> -#include <asm/unaligned.h>
> -
> -#include <video/mipi_display.h>
> -#include <video/videomode.h>
> -
> -#include <drm/drm_atomic_helper.h>
> -#include <drm/drm_bridge.h>
> -#include <drm/drm_mipi_dsi.h>
> -#include <drm/drm_panel.h>
> -#include <drm/drm_print.h>
> +#include <drm/bridge/samsung-dsim.h>
> #include <drm/drm_probe_helper.h>
> #include <drm/drm_simple_kms_helper.h>
>
> #include "exynos_drm_crtc.h"
> #include "exynos_drm_drv.h"
>
> -/* returns true iff both arguments logically differs */
> -#define NEQV(a, b) (!(a) ^ !(b))
> -
> -/* DSIM_STATUS */
> -#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
> -#define DSIM_STOP_STATE_CLK (1 << 8)
> -#define DSIM_TX_READY_HS_CLK (1 << 10)
> -#define DSIM_PLL_STABLE (1 << 31)
> -
> -/* DSIM_SWRST */
> -#define DSIM_FUNCRST (1 << 16)
> -#define DSIM_SWRST (1 << 0)
> -
> -/* DSIM_TIMEOUT */
> -#define DSIM_LPDR_TIMEOUT(x) ((x) << 0)
> -#define DSIM_BTA_TIMEOUT(x) ((x) << 16)
> -
> -/* DSIM_CLKCTRL */
> -#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
> -#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
> -#define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19)
> -#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
> -#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
> -#define DSIM_BYTE_CLKEN (1 << 24)
> -#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
> -#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
> -#define DSIM_PLL_BYPASS (1 << 27)
> -#define DSIM_ESC_CLKEN (1 << 28)
> -#define DSIM_TX_REQUEST_HSCLK (1 << 31)
> -
> -/* DSIM_CONFIG */
> -#define DSIM_LANE_EN_CLK (1 << 0)
> -#define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
> -#define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
> -#define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
> -#define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
> -#define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
> -#define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
> -#define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
> -#define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
> -#define DSIM_SUB_VC (((x) & 0x3) << 16)
> -#define DSIM_MAIN_VC (((x) & 0x3) << 18)
> -#define DSIM_HSA_MODE (1 << 20)
> -#define DSIM_HBP_MODE (1 << 21)
> -#define DSIM_HFP_MODE (1 << 22)
> -#define DSIM_HSE_MODE (1 << 23)
> -#define DSIM_AUTO_MODE (1 << 24)
> -#define DSIM_VIDEO_MODE (1 << 25)
> -#define DSIM_BURST_MODE (1 << 26)
> -#define DSIM_SYNC_INFORM (1 << 27)
> -#define DSIM_EOT_DISABLE (1 << 28)
> -#define DSIM_MFLUSH_VS (1 << 29)
> -/* This flag is valid only for exynos3250/3472/5260/5430 */
> -#define DSIM_CLKLANE_STOP (1 << 30)
> -
> -/* DSIM_ESCMODE */
> -#define DSIM_TX_TRIGGER_RST (1 << 4)
> -#define DSIM_TX_LPDT_LP (1 << 6)
> -#define DSIM_CMD_LPDT_LP (1 << 7)
> -#define DSIM_FORCE_BTA (1 << 16)
> -#define DSIM_FORCE_STOP_STATE (1 << 20)
> -#define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
> -#define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
> -
> -/* DSIM_MDRESOL */
> -#define DSIM_MAIN_STAND_BY (1 << 31)
> -#define DSIM_MAIN_VRESOL(x, num_bits) (((x) & ((1 << (num_bits)) -
> 1)) << 16)
> -#define DSIM_MAIN_HRESOL(x, num_bits) (((x) & ((1 << (num_bits)) -
> 1)) << 0)
> -
> -/* DSIM_MVPORCH */
> -#define DSIM_CMD_ALLOW(x) ((x) << 28)
> -#define DSIM_STABLE_VFP(x) ((x) << 16)
> -#define DSIM_MAIN_VBP(x) ((x) << 0)
> -#define DSIM_CMD_ALLOW_MASK (0xf << 28)
> -#define DSIM_STABLE_VFP_MASK (0x7ff << 16)
> -#define DSIM_MAIN_VBP_MASK (0x7ff << 0)
> -
> -/* DSIM_MHPORCH */
> -#define DSIM_MAIN_HFP(x) ((x) << 16)
> -#define DSIM_MAIN_HBP(x) ((x) << 0)
> -#define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
> -#define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
> -
> -/* DSIM_MSYNC */
> -#define DSIM_MAIN_VSA(x) ((x) << 22)
> -#define DSIM_MAIN_HSA(x) ((x) << 0)
> -#define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
> -#define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
> -
> -/* DSIM_SDRESOL */
> -#define DSIM_SUB_STANDY(x) ((x) << 31)
> -#define DSIM_SUB_VRESOL(x) ((x) << 16)
> -#define DSIM_SUB_HRESOL(x) ((x) << 0)
> -#define DSIM_SUB_STANDY_MASK ((0x1) << 31)
> -#define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
> -#define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
> -
> -/* DSIM_INTSRC */
> -#define DSIM_INT_PLL_STABLE (1 << 31)
> -#define DSIM_INT_SW_RST_RELEASE (1 << 30)
> -#define DSIM_INT_SFR_FIFO_EMPTY (1 << 29)
> -#define DSIM_INT_SFR_HDR_FIFO_EMPTY (1 << 28)
> -#define DSIM_INT_BTA (1 << 25)
> -#define DSIM_INT_FRAME_DONE (1 << 24)
> -#define DSIM_INT_RX_TIMEOUT (1 << 21)
> -#define DSIM_INT_BTA_TIMEOUT (1 << 20)
> -#define DSIM_INT_RX_DONE (1 << 18)
> -#define DSIM_INT_RX_TE (1 << 17)
> -#define DSIM_INT_RX_ACK (1 << 16)
> -#define DSIM_INT_RX_ECC_ERR (1 << 15)
> -#define DSIM_INT_RX_CRC_ERR (1 << 14)
> -
> -/* DSIM_FIFOCTRL */
> -#define DSIM_RX_DATA_FULL (1 << 25)
> -#define DSIM_RX_DATA_EMPTY (1 << 24)
> -#define DSIM_SFR_HEADER_FULL (1 << 23)
> -#define DSIM_SFR_HEADER_EMPTY (1 << 22)
> -#define DSIM_SFR_PAYLOAD_FULL (1 << 21)
> -#define DSIM_SFR_PAYLOAD_EMPTY (1 << 20)
> -#define DSIM_I80_HEADER_FULL (1 << 19)
> -#define DSIM_I80_HEADER_EMPTY (1 << 18)
> -#define DSIM_I80_PAYLOAD_FULL (1 << 17)
> -#define DSIM_I80_PAYLOAD_EMPTY (1 << 16)
> -#define DSIM_SD_HEADER_FULL (1 << 15)
> -#define DSIM_SD_HEADER_EMPTY (1 << 14)
> -#define DSIM_SD_PAYLOAD_FULL (1 << 13)
> -#define DSIM_SD_PAYLOAD_EMPTY (1 << 12)
> -#define DSIM_MD_HEADER_FULL (1 << 11)
> -#define DSIM_MD_HEADER_EMPTY (1 << 10)
> -#define DSIM_MD_PAYLOAD_FULL (1 << 9)
> -#define DSIM_MD_PAYLOAD_EMPTY (1 << 8)
> -#define DSIM_RX_FIFO (1 << 4)
> -#define DSIM_SFR_FIFO (1 << 3)
> -#define DSIM_I80_FIFO (1 << 2)
> -#define DSIM_SD_FIFO (1 << 1)
> -#define DSIM_MD_FIFO (1 << 0)
> -
> -/* DSIM_PHYACCHR */
> -#define DSIM_AFC_EN (1 << 14)
> -#define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
> -
> -/* DSIM_PLLCTRL */
> -#define DSIM_FREQ_BAND(x) ((x) << 24)
> -#define DSIM_PLL_EN (1 << 23)
> -#define DSIM_PLL_P(x) ((x) << 13)
> -#define DSIM_PLL_M(x) ((x) << 4)
> -#define DSIM_PLL_S(x) ((x) << 1)
> -
> -/* DSIM_PHYCTRL */
> -#define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0)
> -#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP (1 << 30)
> -#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP (1 << 14)
> -
> -/* DSIM_PHYTIMING */
> -#define DSIM_PHYTIMING_LPX(x) ((x) << 8)
> -#define DSIM_PHYTIMING_HS_EXIT(x) ((x) << 0)
> -
> -/* DSIM_PHYTIMING1 */
> -#define DSIM_PHYTIMING1_CLK_PREPARE(x) ((x) << 24)
> -#define DSIM_PHYTIMING1_CLK_ZERO(x) ((x) << 16)
> -#define DSIM_PHYTIMING1_CLK_POST(x) ((x) << 8)
> -#define DSIM_PHYTIMING1_CLK_TRAIL(x) ((x) << 0)
> -
> -/* DSIM_PHYTIMING2 */
> -#define DSIM_PHYTIMING2_HS_PREPARE(x) ((x) << 16)
> -#define DSIM_PHYTIMING2_HS_ZERO(x) ((x) << 8)
> -#define DSIM_PHYTIMING2_HS_TRAIL(x) ((x) << 0)
> -
> -#define DSI_MAX_BUS_WIDTH 4
> -#define DSI_NUM_VIRTUAL_CHANNELS 4
> -#define DSI_TX_FIFO_SIZE 2048
> -#define DSI_RX_FIFO_SIZE 256
> -#define DSI_XFER_TIMEOUT_MS 100
> -#define DSI_RX_FIFO_EMPTY 0x30800002
> -
> -#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"
> -
> -static const char *const clk_names[5] = { "bus_clk", "sclk_mipi",
> - "phyclk_mipidphy0_bitclkdiv8", "phyclk_mipidphy0_rxclkesc0",
> - "sclk_rgb_vclk_to_dsim0" };
> -
> -enum exynos_dsi_transfer_type {
> - EXYNOS_DSI_TX,
> - EXYNOS_DSI_RX,
> -};
> -
> -struct exynos_dsi_transfer {
> - struct list_head list;
> - struct completion completed;
> - int result;
> - struct mipi_dsi_packet packet;
> - u16 flags;
> - u16 tx_done;
> -
> - u8 *rx_payload;
> - u16 rx_len;
> - u16 rx_done;
> -};
> -
> -#define DSIM_STATE_ENABLED BIT(0)
> -#define DSIM_STATE_INITIALIZED BIT(1)
> -#define DSIM_STATE_CMD_LPM BIT(2)
> -#define DSIM_STATE_VIDOUT_AVAILABLE BIT(3)
> -
> -struct exynos_dsi_driver_data {
> - const unsigned int *reg_ofs;
> - unsigned int plltmr_reg;
> - unsigned int has_freqband:1;
> - unsigned int has_clklane_stop:1;
> - unsigned int num_clks;
> - unsigned int max_freq;
> - unsigned int wait_for_reset;
> - unsigned int num_bits_resol;
> - const unsigned int *reg_values;
> -};
> -
> struct exynos_dsi {
> struct drm_encoder encoder;
> - struct mipi_dsi_host dsi_host;
> - struct drm_bridge bridge;
> - struct drm_bridge *out_bridge;
> - struct device *dev;
> - struct drm_display_mode mode;
> -
> - void __iomem *reg_base;
> - struct phy *phy;
> - struct clk **clks;
> - struct regulator_bulk_data supplies[2];
> - int irq;
> struct gpio_desc *te_gpio;
> -
> - u32 pll_clk_rate;
> - u32 burst_clk_rate;
> - u32 esc_clk_rate;
> - u32 lanes;
> - u32 mode_flags;
> - u32 format;
> -
> - int state;
> - struct drm_property *brightness;
> - struct completion completed;
> -
> - spinlock_t transfer_lock; /* protects transfer_list */
> - struct list_head transfer_list;
> -
> - const struct exynos_dsi_driver_data *driver_data;
> -};
> -
> -#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
> -
> -static inline struct exynos_dsi *bridge_to_dsi(struct drm_bridge *b)
> -{
> - return container_of(b, struct exynos_dsi, bridge);
> -}
> -
> -enum reg_idx {
> - DSIM_STATUS_REG, /* Status register */
> - DSIM_SWRST_REG, /* Software reset register */
> - DSIM_CLKCTRL_REG, /* Clock control register */
> - DSIM_TIMEOUT_REG, /* Time out register */
> - DSIM_CONFIG_REG, /* Configuration register */
> - DSIM_ESCMODE_REG, /* Escape mode register */
> - DSIM_MDRESOL_REG,
> - DSIM_MVPORCH_REG, /* Main display Vporch register */
> - DSIM_MHPORCH_REG, /* Main display Hporch register */
> - DSIM_MSYNC_REG, /* Main display sync area register */
> - DSIM_INTSRC_REG, /* Interrupt source register */
> - DSIM_INTMSK_REG, /* Interrupt mask register */
> - DSIM_PKTHDR_REG, /* Packet Header FIFO register */
> - DSIM_PAYLOAD_REG, /* Payload FIFO register */
> - DSIM_RXFIFO_REG, /* Read FIFO register */
> - DSIM_FIFOCTRL_REG, /* FIFO status and control register */
> - DSIM_PLLCTRL_REG, /* PLL control register */
> - DSIM_PHYCTRL_REG,
> - DSIM_PHYTIMING_REG,
> - DSIM_PHYTIMING1_REG,
> - DSIM_PHYTIMING2_REG,
> - NUM_REGS
> };
>
> -static inline void exynos_dsi_write(struct exynos_dsi *dsi, enum reg_idx idx,
> - u32 val)
> -{
> -
> - writel(val, dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
> -}
> -
> -static inline u32 exynos_dsi_read(struct exynos_dsi *dsi, enum reg_idx idx)
> -{
> - return readl(dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
> -}
> -
> -static const unsigned int exynos_reg_ofs[] = {
> - [DSIM_STATUS_REG] = 0x00,
> - [DSIM_SWRST_REG] = 0x04,
> - [DSIM_CLKCTRL_REG] = 0x08,
> - [DSIM_TIMEOUT_REG] = 0x0c,
> - [DSIM_CONFIG_REG] = 0x10,
> - [DSIM_ESCMODE_REG] = 0x14,
> - [DSIM_MDRESOL_REG] = 0x18,
> - [DSIM_MVPORCH_REG] = 0x1c,
> - [DSIM_MHPORCH_REG] = 0x20,
> - [DSIM_MSYNC_REG] = 0x24,
> - [DSIM_INTSRC_REG] = 0x2c,
> - [DSIM_INTMSK_REG] = 0x30,
> - [DSIM_PKTHDR_REG] = 0x34,
> - [DSIM_PAYLOAD_REG] = 0x38,
> - [DSIM_RXFIFO_REG] = 0x3c,
> - [DSIM_FIFOCTRL_REG] = 0x44,
> - [DSIM_PLLCTRL_REG] = 0x4c,
> - [DSIM_PHYCTRL_REG] = 0x5c,
> - [DSIM_PHYTIMING_REG] = 0x64,
> - [DSIM_PHYTIMING1_REG] = 0x68,
> - [DSIM_PHYTIMING2_REG] = 0x6c,
> -};
> -
> -static const unsigned int exynos5433_reg_ofs[] = {
> - [DSIM_STATUS_REG] = 0x04,
> - [DSIM_SWRST_REG] = 0x0C,
> - [DSIM_CLKCTRL_REG] = 0x10,
> - [DSIM_TIMEOUT_REG] = 0x14,
> - [DSIM_CONFIG_REG] = 0x18,
> - [DSIM_ESCMODE_REG] = 0x1C,
> - [DSIM_MDRESOL_REG] = 0x20,
> - [DSIM_MVPORCH_REG] = 0x24,
> - [DSIM_MHPORCH_REG] = 0x28,
> - [DSIM_MSYNC_REG] = 0x2C,
> - [DSIM_INTSRC_REG] = 0x34,
> - [DSIM_INTMSK_REG] = 0x38,
> - [DSIM_PKTHDR_REG] = 0x3C,
> - [DSIM_PAYLOAD_REG] = 0x40,
> - [DSIM_RXFIFO_REG] = 0x44,
> - [DSIM_FIFOCTRL_REG] = 0x4C,
> - [DSIM_PLLCTRL_REG] = 0x94,
> - [DSIM_PHYCTRL_REG] = 0xA4,
> - [DSIM_PHYTIMING_REG] = 0xB4,
> - [DSIM_PHYTIMING1_REG] = 0xB8,
> - [DSIM_PHYTIMING2_REG] = 0xBC,
> -};
> -
> -enum reg_value_idx {
> - RESET_TYPE,
> - PLL_TIMER,
> - STOP_STATE_CNT,
> - PHYCTRL_ULPS_EXIT,
> - PHYCTRL_VREG_LP,
> - PHYCTRL_SLEW_UP,
> - PHYTIMING_LPX,
> - PHYTIMING_HS_EXIT,
> - PHYTIMING_CLK_PREPARE,
> - PHYTIMING_CLK_ZERO,
> - PHYTIMING_CLK_POST,
> - PHYTIMING_CLK_TRAIL,
> - PHYTIMING_HS_PREPARE,
> - PHYTIMING_HS_ZERO,
> - PHYTIMING_HS_TRAIL
> -};
> -
> -static const unsigned int reg_values[] = {
> - [RESET_TYPE] = DSIM_SWRST,
> - [PLL_TIMER] = 500,
> - [STOP_STATE_CNT] = 0xf,
> - [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
> - [PHYCTRL_VREG_LP] = 0,
> - [PHYCTRL_SLEW_UP] = 0,
> - [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
> - [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
> - [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
> - [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
> - [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
> - [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
> - [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
> - [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
> - [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
> -};
> -
> -static const unsigned int exynos5422_reg_values[] = {
> - [RESET_TYPE] = DSIM_SWRST,
> - [PLL_TIMER] = 500,
> - [STOP_STATE_CNT] = 0xf,
> - [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0xaf),
> - [PHYCTRL_VREG_LP] = 0,
> - [PHYCTRL_SLEW_UP] = 0,
> - [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x08),
> - [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0d),
> - [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
> - [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x30),
> - [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
> - [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x0a),
> - [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0c),
> - [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x11),
> - [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0d),
> -};
> -
> -static const unsigned int exynos5433_reg_values[] = {
> - [RESET_TYPE] = DSIM_FUNCRST,
> - [PLL_TIMER] = 22200,
> - [STOP_STATE_CNT] = 0xa,
> - [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190),
> - [PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP,
> - [PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP,
> - [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07),
> - [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c),
> - [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
> - [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d),
> - [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
> - [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09),
> - [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b),
> - [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10),
> - [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
> -};
> -
> -static const struct exynos_dsi_driver_data exynos3_dsi_driver_data = {
> - .reg_ofs = exynos_reg_ofs,
> - .plltmr_reg = 0x50,
> - .has_freqband = 1,
> - .has_clklane_stop = 1,
> - .num_clks = 2,
> - .max_freq = 1000,
> - .wait_for_reset = 1,
> - .num_bits_resol = 11,
> - .reg_values = reg_values,
> -};
> -
> -static const struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
> - .reg_ofs = exynos_reg_ofs,
> - .plltmr_reg = 0x50,
> - .has_freqband = 1,
> - .has_clklane_stop = 1,
> - .num_clks = 2,
> - .max_freq = 1000,
> - .wait_for_reset = 1,
> - .num_bits_resol = 11,
> - .reg_values = reg_values,
> -};
> -
> -static const struct exynos_dsi_driver_data exynos5_dsi_driver_data = {
> - .reg_ofs = exynos_reg_ofs,
> - .plltmr_reg = 0x58,
> - .num_clks = 2,
> - .max_freq = 1000,
> - .wait_for_reset = 1,
> - .num_bits_resol = 11,
> - .reg_values = reg_values,
> -};
> -
> -static const struct exynos_dsi_driver_data exynos5433_dsi_driver_data = {
> - .reg_ofs = exynos5433_reg_ofs,
> - .plltmr_reg = 0xa0,
> - .has_clklane_stop = 1,
> - .num_clks = 5,
> - .max_freq = 1500,
> - .wait_for_reset = 0,
> - .num_bits_resol = 12,
> - .reg_values = exynos5433_reg_values,
> -};
> -
> -static const struct exynos_dsi_driver_data exynos5422_dsi_driver_data = {
> - .reg_ofs = exynos5433_reg_ofs,
> - .plltmr_reg = 0xa0,
> - .has_clklane_stop = 1,
> - .num_clks = 2,
> - .max_freq = 1500,
> - .wait_for_reset = 1,
> - .num_bits_resol = 12,
> - .reg_values = exynos5422_reg_values,
> -};
> -
> -static const struct of_device_id exynos_dsi_of_match[] = {
> - { .compatible = "samsung,exynos3250-mipi-dsi",
> - .data = &exynos3_dsi_driver_data },
> - { .compatible = "samsung,exynos4210-mipi-dsi",
> - .data = &exynos4_dsi_driver_data },
> - { .compatible = "samsung,exynos5410-mipi-dsi",
> - .data = &exynos5_dsi_driver_data },
> - { .compatible = "samsung,exynos5422-mipi-dsi",
> - .data = &exynos5422_dsi_driver_data },
> - { .compatible = "samsung,exynos5433-mipi-dsi",
> - .data = &exynos5433_dsi_driver_data },
> - { }
> -};
> -
> -static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi)
> -{
> - if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
> - return;
> -
> - dev_err(dsi->dev, "timeout waiting for reset\n");
> -}
> -
> -static void exynos_dsi_reset(struct exynos_dsi *dsi)
> -{
> - u32 reset_val = dsi->driver_data->reg_values[RESET_TYPE];
> -
> - reinit_completion(&dsi->completed);
> - exynos_dsi_write(dsi, DSIM_SWRST_REG, reset_val);
> -}
> -
> -#ifndef MHZ
> -#define MHZ (1000*1000)
> -#endif
> -
> -static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
> - unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s)
> -{
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - unsigned long best_freq = 0;
> - u32 min_delta = 0xffffffff;
> - u8 p_min, p_max;
> - u8 _p, best_p;
> - u16 _m, best_m;
> - u8 _s, best_s;
> -
> - p_min = DIV_ROUND_UP(fin, (12 * MHZ));
> - p_max = fin / (6 * MHZ);
> -
> - for (_p = p_min; _p <= p_max; ++_p) {
> - for (_s = 0; _s <= 5; ++_s) {
> - u64 tmp;
> - u32 delta;
> -
> - tmp = (u64)fout * (_p << _s);
> - do_div(tmp, fin);
> - _m = tmp;
> - if (_m < 41 || _m > 125)
> - continue;
> -
> - tmp = (u64)_m * fin;
> - do_div(tmp, _p);
> - if (tmp < 500 * MHZ ||
> - tmp > driver_data->max_freq * MHZ)
> - continue;
> -
> - tmp = (u64)_m * fin;
> - do_div(tmp, _p << _s);
> -
> - delta = abs(fout - tmp);
> - if (delta < min_delta) {
> - best_p = _p;
> - best_m = _m;
> - best_s = _s;
> - min_delta = delta;
> - best_freq = tmp;
> - }
> - }
> - }
> -
> - if (best_freq) {
> - *p = best_p;
> - *m = best_m;
> - *s = best_s;
> - }
> -
> - return best_freq;
> -}
> -
> -static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
> - unsigned long freq)
> -{
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - unsigned long fin, fout;
> - int timeout;
> - u8 p, s;
> - u16 m;
> - u32 reg;
> -
> - fin = dsi->pll_clk_rate;
> - fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s);
> - if (!fout) {
> - dev_err(dsi->dev,
> - "failed to find PLL PMS for requested frequency\n");
> - return 0;
> - }
> - dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
> -
> - writel(driver_data->reg_values[PLL_TIMER],
> - dsi->reg_base + driver_data->plltmr_reg);
> -
> - reg = DSIM_PLL_EN | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s);
> -
> - if (driver_data->has_freqband) {
> - static const unsigned long freq_bands[] = {
> - 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
> - 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
> - 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
> - 770 * MHZ, 870 * MHZ, 950 * MHZ,
> - };
> - int band;
> -
> - for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
> - if (fout < freq_bands[band])
> - break;
> -
> - dev_dbg(dsi->dev, "band %d\n", band);
> -
> - reg |= DSIM_FREQ_BAND(band);
> - }
> -
> - exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);
> -
> - timeout = 1000;
> - do {
> - if (timeout-- == 0) {
> - dev_err(dsi->dev, "PLL failed to stabilize\n");
> - return 0;
> - }
> - reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
> - } while ((reg & DSIM_PLL_STABLE) == 0);
> -
> - return fout;
> -}
> -
> -static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)
> -{
> - unsigned long hs_clk, byte_clk, esc_clk;
> - unsigned long esc_div;
> - u32 reg;
> -
> - hs_clk = exynos_dsi_set_pll(dsi, dsi->burst_clk_rate);
> - if (!hs_clk) {
> - dev_err(dsi->dev, "failed to configure DSI PLL\n");
> - return -EFAULT;
> - }
> -
> - byte_clk = hs_clk / 8;
> - esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
> - esc_clk = byte_clk / esc_div;
> -
> - if (esc_clk > 20 * MHZ) {
> - ++esc_div;
> - esc_clk = byte_clk / esc_div;
> - }
> -
> - dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
> - hs_clk, byte_clk, esc_clk);
> -
> - reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
> - reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
> - | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
> - | DSIM_BYTE_CLK_SRC_MASK);
> - reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
> - | DSIM_ESC_PRESCALER(esc_div)
> - | DSIM_LANE_ESC_CLK_EN_CLK
> - | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
> - | DSIM_BYTE_CLK_SRC(0)
> - | DSIM_TX_REQUEST_HSCLK;
> - exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);
> -
> - return 0;
> -}
> -
> -static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
> -{
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - const unsigned int *reg_values = driver_data->reg_values;
> - u32 reg;
> -
> - if (driver_data->has_freqband)
> - return;
> -
> - /* B D-PHY: D-PHY Master & Slave Analog Block control */
> - reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
> - reg_values[PHYCTRL_SLEW_UP];
> - exynos_dsi_write(dsi, DSIM_PHYCTRL_REG, reg);
> -
> - /*
> - * T LPX: Transmitted length of any Low-Power state period
> - * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
> - * burst
> - */
> - reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
> - exynos_dsi_write(dsi, DSIM_PHYTIMING_REG, reg);
> -
> - /*
> - * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
> - * Line state immediately before the HS-0 Line state starting the
> - * HS transmission
> - * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
> - * transmitting the Clock.
> - * T CLK_POST: Time that the transmitter continues to send HS clock
> - * after the last associated Data Lane has transitioned to LP Mode
> - * Interval is defined as the period from the end of T HS-TRAIL to
> - * the beginning of T CLK-TRAIL
> - * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
> - * the last payload clock bit of a HS transmission burst
> - */
> - reg = reg_values[PHYTIMING_CLK_PREPARE] |
> - reg_values[PHYTIMING_CLK_ZERO] |
> - reg_values[PHYTIMING_CLK_POST] |
> - reg_values[PHYTIMING_CLK_TRAIL];
> -
> - exynos_dsi_write(dsi, DSIM_PHYTIMING1_REG, reg);
> -
> - /*
> - * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
> - * Line state immediately before the HS-0 Line state starting the
> - * HS transmission
> - * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
> - * transmitting the Sync sequence.
> - * T HS-TRAIL: Time that the transmitter drives the flipped differential
> - * state after last payload data bit of a HS transmission burst
> - */
> - reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
> - reg_values[PHYTIMING_HS_TRAIL];
> - exynos_dsi_write(dsi, DSIM_PHYTIMING2_REG, reg);
> -}
> -
> -static void exynos_dsi_disable_clock(struct exynos_dsi *dsi)
> -{
> - u32 reg;
> -
> - reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
> - reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
> - | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
> - exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);
> -
> - reg = exynos_dsi_read(dsi, DSIM_PLLCTRL_REG);
> - reg &= ~DSIM_PLL_EN;
> - exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);
> -}
> -
> -static void exynos_dsi_enable_lane(struct exynos_dsi *dsi, u32 lane)
> -{
> - u32 reg = exynos_dsi_read(dsi, DSIM_CONFIG_REG);
> - reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK |
> - DSIM_LANE_EN(lane));
> - exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);
> -}
> -
> -static int exynos_dsi_init_link(struct exynos_dsi *dsi)
> -{
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - int timeout;
> - u32 reg;
> - u32 lanes_mask;
> -
> - /* Initialize FIFO pointers */
> - reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);
> - reg &= ~0x1f;
> - exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);
> -
> - usleep_range(9000, 11000);
> -
> - reg |= 0x1f;
> - exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);
> - usleep_range(9000, 11000);
> -
> - /* DSI configuration */
> - reg = 0;
> -
> - /*
> - * The first bit of mode_flags specifies display configuration.
> - * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
> - * mode, otherwise it will support command mode.
> - */
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
> - reg |= DSIM_VIDEO_MODE;
> -
> - /*
> - * The user manual describes that following bits are ignored in
> - * command mode.
> - */
> - if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH))
> - reg |= DSIM_MFLUSH_VS;
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
> - reg |= DSIM_SYNC_INFORM;
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> - reg |= DSIM_BURST_MODE;
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT)
> - reg |= DSIM_AUTO_MODE;
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE)
> - reg |= DSIM_HSE_MODE;
> - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HFP))
> - reg |= DSIM_HFP_MODE;
> - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HBP))
> - reg |= DSIM_HBP_MODE;
> - if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_NO_HSA))
> - reg |= DSIM_HSA_MODE;
> - }
> -
> - if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
> - reg |= DSIM_EOT_DISABLE;
> -
> - switch (dsi->format) {
> - case MIPI_DSI_FMT_RGB888:
> - reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
> - break;
> - case MIPI_DSI_FMT_RGB666:
> - reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
> - break;
> - case MIPI_DSI_FMT_RGB666_PACKED:
> - reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
> - break;
> - case MIPI_DSI_FMT_RGB565:
> - reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
> - break;
> - default:
> - dev_err(dsi->dev, "invalid pixel format\n");
> - return -EINVAL;
> - }
> -
> - /*
> - * Use non-continuous clock mode if the periparal wants and
> - * host controller supports
> - *
> - * In non-continous clock mode, host controller will turn off
> - * the HS clock between high-speed transmissions to reduce
> - * power consumption.
> - */
> - if (driver_data->has_clklane_stop &&
> - dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
> - reg |= DSIM_CLKLANE_STOP;
> - }
> - exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);
> -
> - lanes_mask = BIT(dsi->lanes) - 1;
> - exynos_dsi_enable_lane(dsi, lanes_mask);
> -
> - /* Check clock and data lane state are stop state */
> - timeout = 100;
> - do {
> - if (timeout-- == 0) {
> - dev_err(dsi->dev, "waiting for bus lanes timed out\n");
> - return -EFAULT;
> - }
> -
> - reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
> - if ((reg & DSIM_STOP_STATE_DAT(lanes_mask))
> - != DSIM_STOP_STATE_DAT(lanes_mask))
> - continue;
> - } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));
> -
> - reg = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
> - reg &= ~DSIM_STOP_STATE_CNT_MASK;
> - reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
> - exynos_dsi_write(dsi, DSIM_ESCMODE_REG, reg);
> -
> - reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
> - exynos_dsi_write(dsi, DSIM_TIMEOUT_REG, reg);
> -
> - return 0;
> -}
> -
> -static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
> -{
> - struct drm_display_mode *m = &dsi->mode;
> - unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
> - u32 reg;
> -
> - if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
> - reg = DSIM_CMD_ALLOW(0xf)
> - | DSIM_STABLE_VFP(m->vsync_start - m->vdisplay)
> - | DSIM_MAIN_VBP(m->vtotal - m->vsync_end);
> - exynos_dsi_write(dsi, DSIM_MVPORCH_REG, reg);
> -
> - reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay)
> - | DSIM_MAIN_HBP(m->htotal - m->hsync_end);
> - exynos_dsi_write(dsi, DSIM_MHPORCH_REG, reg);
> -
> - reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start)
> - | DSIM_MAIN_HSA(m->hsync_end - m->hsync_start);
> - exynos_dsi_write(dsi, DSIM_MSYNC_REG, reg);
> - }
> - reg = DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
> - DSIM_MAIN_VRESOL(m->vdisplay, num_bits_resol);
> -
> - exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);
> -
> - dev_dbg(dsi->dev, "LCD size = %dx%d\n", m->hdisplay, m->vdisplay);
> -}
> -
> -static void exynos_dsi_set_display_enable(struct exynos_dsi *dsi, bool
> enable)
> -{
> - u32 reg;
> -
> - reg = exynos_dsi_read(dsi, DSIM_MDRESOL_REG);
> - if (enable)
> - reg |= DSIM_MAIN_STAND_BY;
> - else
> - reg &= ~DSIM_MAIN_STAND_BY;
> - exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);
> -}
> -
> -static int exynos_dsi_wait_for_hdr_fifo(struct exynos_dsi *dsi)
> -{
> - int timeout = 2000;
> -
> - do {
> - u32 reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);
> -
> - if (!(reg & DSIM_SFR_HEADER_FULL))
> - return 0;
> -
> - if (!cond_resched())
> - usleep_range(950, 1050);
> - } while (--timeout);
> -
> - return -ETIMEDOUT;
> -}
> -
> -static void exynos_dsi_set_cmd_lpm(struct exynos_dsi *dsi, bool lpm)
> -{
> - u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
> -
> - if (lpm)
> - v |= DSIM_CMD_LPDT_LP;
> - else
> - v &= ~DSIM_CMD_LPDT_LP;
> -
> - exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
> -}
> -
> -static void exynos_dsi_force_bta(struct exynos_dsi *dsi)
> -{
> - u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
> - v |= DSIM_FORCE_BTA;
> - exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
> -}
> -
> -static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi,
> - struct exynos_dsi_transfer *xfer)
> -{
> - struct device *dev = dsi->dev;
> - struct mipi_dsi_packet *pkt = &xfer->packet;
> - const u8 *payload = pkt->payload + xfer->tx_done;
> - u16 length = pkt->payload_length - xfer->tx_done;
> - bool first = !xfer->tx_done;
> - u32 reg;
> -
> - dev_dbg(dev, "< xfer %pK: tx len %u, done %u, rx len %u, done %u\n",
> - xfer, length, xfer->tx_done, xfer->rx_len, xfer->rx_done);
> -
> - if (length > DSI_TX_FIFO_SIZE)
> - length = DSI_TX_FIFO_SIZE;
> -
> - xfer->tx_done += length;
> -
> - /* Send payload */
> - while (length >= 4) {
> - reg = get_unaligned_le32(payload);
> - exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
> - payload += 4;
> - length -= 4;
> - }
> -
> - reg = 0;
> - switch (length) {
> - case 3:
> - reg |= payload[2] << 16;
> - fallthrough;
> - case 2:
> - reg |= payload[1] << 8;
> - fallthrough;
> - case 1:
> - reg |= payload[0];
> - exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
> - break;
> - }
> -
> - /* Send packet header */
> - if (!first)
> - return;
> -
> - reg = get_unaligned_le32(pkt->header);
> - if (exynos_dsi_wait_for_hdr_fifo(dsi)) {
> - dev_err(dev, "waiting for header FIFO timed out\n");
> - return;
> - }
> -
> - if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM,
> - dsi->state & DSIM_STATE_CMD_LPM)) {
> - exynos_dsi_set_cmd_lpm(dsi, xfer->flags & MIPI_DSI_MSG_USE_LPM);
> - dsi->state ^= DSIM_STATE_CMD_LPM;
> - }
> -
> - exynos_dsi_write(dsi, DSIM_PKTHDR_REG, reg);
> -
> - if (xfer->flags & MIPI_DSI_MSG_REQ_ACK)
> - exynos_dsi_force_bta(dsi);
> -}
> -
> -static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi,
> - struct exynos_dsi_transfer *xfer)
> -{
> - u8 *payload = xfer->rx_payload + xfer->rx_done;
> - bool first = !xfer->rx_done;
> - struct device *dev = dsi->dev;
> - u16 length;
> - u32 reg;
> -
> - if (first) {
> - reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
> -
> - switch (reg & 0x3f) {
> - case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
> - case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
> - if (xfer->rx_len >= 2) {
> - payload[1] = reg >> 16;
> - ++xfer->rx_done;
> - }
> - fallthrough;
> - case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
> - case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
> - payload[0] = reg >> 8;
> - ++xfer->rx_done;
> - xfer->rx_len = xfer->rx_done;
> - xfer->result = 0;
> - goto clear_fifo;
> - case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
> - dev_err(dev, "DSI Error Report: 0x%04x\n",
> - (reg >> 8) & 0xffff);
> - xfer->result = 0;
> - goto clear_fifo;
> - }
> -
> - length = (reg >> 8) & 0xffff;
> - if (length > xfer->rx_len) {
> - dev_err(dev,
> - "response too long (%u > %u bytes),
> stripping\n",
> - xfer->rx_len, length);
> - length = xfer->rx_len;
> - } else if (length < xfer->rx_len)
> - xfer->rx_len = length;
> - }
> -
> - length = xfer->rx_len - xfer->rx_done;
> - xfer->rx_done += length;
> -
> - /* Receive payload */
> - while (length >= 4) {
> - reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
> - payload[0] = (reg >> 0) & 0xff;
> - payload[1] = (reg >> 8) & 0xff;
> - payload[2] = (reg >> 16) & 0xff;
> - payload[3] = (reg >> 24) & 0xff;
> - payload += 4;
> - length -= 4;
> - }
> -
> - if (length) {
> - reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
> - switch (length) {
> - case 3:
> - payload[2] = (reg >> 16) & 0xff;
> - fallthrough;
> - case 2:
> - payload[1] = (reg >> 8) & 0xff;
> - fallthrough;
> - case 1:
> - payload[0] = reg & 0xff;
> - }
> - }
> -
> - if (xfer->rx_done == xfer->rx_len)
> - xfer->result = 0;
> -
> -clear_fifo:
> - length = DSI_RX_FIFO_SIZE / 4;
> - do {
> - reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
> - if (reg == DSI_RX_FIFO_EMPTY)
> - break;
> - } while (--length);
> -}
> -
> -static void exynos_dsi_transfer_start(struct exynos_dsi *dsi)
> -{
> - unsigned long flags;
> - struct exynos_dsi_transfer *xfer;
> - bool start = false;
> -
> -again:
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - if (list_empty(&dsi->transfer_list)) {
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> - return;
> - }
> -
> - xfer = list_first_entry(&dsi->transfer_list,
> - struct exynos_dsi_transfer, list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> - if (xfer->packet.payload_length &&
> - xfer->tx_done == xfer->packet.payload_length)
> - /* waiting for RX */
> - return;
> -
> - exynos_dsi_send_to_fifo(dsi, xfer);
> -
> - if (xfer->packet.payload_length || xfer->rx_len)
> - return;
> -
> - xfer->result = 0;
> - complete(&xfer->completed);
> -
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - list_del_init(&xfer->list);
> - start = !list_empty(&dsi->transfer_list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> - if (start)
> - goto again;
> -}
> -
> -static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi)
> -{
> - struct exynos_dsi_transfer *xfer;
> - unsigned long flags;
> - bool start = true;
> -
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - if (list_empty(&dsi->transfer_list)) {
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> - return false;
> - }
> -
> - xfer = list_first_entry(&dsi->transfer_list,
> - struct exynos_dsi_transfer, list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> - dev_dbg(dsi->dev,
> - "> xfer %pK, tx_len %zu, tx_done %u, rx_len %u, rx_done %u\n",
> - xfer, xfer->packet.payload_length, xfer->tx_done, xfer->rx_len,
> - xfer->rx_done);
> -
> - if (xfer->tx_done != xfer->packet.payload_length)
> - return true;
> -
> - if (xfer->rx_done != xfer->rx_len)
> - exynos_dsi_read_from_fifo(dsi, xfer);
> -
> - if (xfer->rx_done != xfer->rx_len)
> - return true;
> -
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - list_del_init(&xfer->list);
> - start = !list_empty(&dsi->transfer_list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> - if (!xfer->rx_len)
> - xfer->result = 0;
> - complete(&xfer->completed);
> -
> - return start;
> -}
> -
> -static void exynos_dsi_remove_transfer(struct exynos_dsi *dsi,
> - struct exynos_dsi_transfer *xfer)
> +static void exynos_dsi_enable_irq(struct samsung_dsim *dsim)
> {
> - unsigned long flags;
> - bool start;
> -
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - if (!list_empty(&dsi->transfer_list) &&
> - xfer == list_first_entry(&dsi->transfer_list,
> - struct exynos_dsi_transfer, list)) {
> - list_del_init(&xfer->list);
> - start = !list_empty(&dsi->transfer_list);
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> - if (start)
> - exynos_dsi_transfer_start(dsi);
> - return;
> - }
> + struct exynos_dsi *dsi = dsim->priv;
>
> - list_del_init(&xfer->list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> + if (dsi->te_gpio)
> + enable_irq(gpiod_to_irq(dsi->te_gpio));
> }
>
> -static int exynos_dsi_transfer(struct exynos_dsi *dsi,
> - struct exynos_dsi_transfer *xfer)
> +static void exynos_dsi_disable_irq(struct samsung_dsim *dsim)
> {
> - unsigned long flags;
> - bool stopped;
> + struct exynos_dsi *dsi = dsim->priv;
>
> - xfer->tx_done = 0;
> - xfer->rx_done = 0;
> - xfer->result = -ETIMEDOUT;
> - init_completion(&xfer->completed);
> -
> - spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> - stopped = list_empty(&dsi->transfer_list);
> - list_add_tail(&xfer->list, &dsi->transfer_list);
> -
> - spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> - if (stopped)
> - exynos_dsi_transfer_start(dsi);
> -
> - wait_for_completion_timeout(&xfer->completed,
> - msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
> - if (xfer->result == -ETIMEDOUT) {
> - struct mipi_dsi_packet *pkt = &xfer->packet;
> - exynos_dsi_remove_transfer(dsi, xfer);
> - dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 4, pkt->header,
> - (int)pkt->payload_length, pkt->payload);
> - return -ETIMEDOUT;
> - }
> -
> - /* Also covers hardware timeout condition */
> - return xfer->result;
> + if (dsi->te_gpio)
> + disable_irq(gpiod_to_irq(dsi->te_gpio));
> }
>
> -static irqreturn_t exynos_dsi_irq(int irq, void *dev_id)
> -{
> - struct exynos_dsi *dsi = dev_id;
> - u32 status;
> -
> - status = exynos_dsi_read(dsi, DSIM_INTSRC_REG);
> - if (!status) {
> - static unsigned long int j;
> - if (printk_timed_ratelimit(&j, 500))
> - dev_warn(dsi->dev, "spurious interrupt\n");
> - return IRQ_HANDLED;
> - }
> - exynos_dsi_write(dsi, DSIM_INTSRC_REG, status);
> -
> - if (status & DSIM_INT_SW_RST_RELEASE) {
> - u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
> - DSIM_INT_SFR_HDR_FIFO_EMPTY | DSIM_INT_RX_ECC_ERR |
> - DSIM_INT_SW_RST_RELEASE);
> - exynos_dsi_write(dsi, DSIM_INTMSK_REG, mask);
> - complete(&dsi->completed);
> - return IRQ_HANDLED;
> - }
> -
> - if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
> - DSIM_INT_PLL_STABLE)))
> - return IRQ_HANDLED;
> -
> - if (exynos_dsi_transfer_finish(dsi))
> - exynos_dsi_transfer_start(dsi);
> -
> - return IRQ_HANDLED;
> -}
> +static const struct samsung_dsim_irq_ops samsung_dsim_exynos_host_irq = {
> + .enable = exynos_dsi_enable_irq,
> + .disable = exynos_dsi_disable_irq,
> +};
>
> static irqreturn_t exynos_dsi_te_irq_handler(int irq, void *dev_id)
> {
> - struct exynos_dsi *dsi = (struct exynos_dsi *)dev_id;
> + struct samsung_dsim *dsim = (struct samsung_dsim *)dev_id;
> + struct exynos_dsi *dsi = dsim->priv;
> struct drm_encoder *encoder = &dsi->encoder;
>
> - if (dsi->state & DSIM_STATE_VIDOUT_AVAILABLE)
> + if (dsim->state & DSIM_STATE_VIDOUT_AVAILABLE)
> exynos_drm_crtc_te_handler(encoder->crtc);
>
> return IRQ_HANDLED;
> }
>
> -static void exynos_dsi_enable_irq(struct exynos_dsi *dsi)
> +static int exynos_dsi_register_te_irq(struct samsung_dsim *dsim, struct
> device *panel)
> {
> - enable_irq(dsi->irq);
> -
> - if (dsi->te_gpio)
> - enable_irq(gpiod_to_irq(dsi->te_gpio));
> -}
> -
> -static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)
> -{
> - if (dsi->te_gpio)
> - disable_irq(gpiod_to_irq(dsi->te_gpio));
> -
> - disable_irq(dsi->irq);
> -}
> -
> -static int exynos_dsi_init(struct exynos_dsi *dsi)
> -{
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> -
> - exynos_dsi_reset(dsi);
> - exynos_dsi_enable_irq(dsi);
> -
> - if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST)
> - exynos_dsi_enable_lane(dsi, BIT(dsi->lanes) - 1);
> -
> - exynos_dsi_enable_clock(dsi);
> - if (driver_data->wait_for_reset)
> - exynos_dsi_wait_for_reset(dsi);
> - exynos_dsi_set_phy_ctrl(dsi);
> - exynos_dsi_init_link(dsi);
> -
> - return 0;
> -}
> -
> -static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi,
> - struct device *panel)
> -{
> - int ret;
> + struct exynos_dsi *dsi = dsim->priv;
> int te_gpio_irq;
> + int ret;
>
> - dsi->te_gpio = gpiod_get_optional(panel, "te", GPIOD_IN);
> + dsi->te_gpio = devm_gpiod_get_optional(panel, "te", GPIOD_IN);
> if (!dsi->te_gpio) {
> return 0;
> } else if (IS_ERR(dsi->te_gpio)) {
> - dev_err(dsi->dev, "gpio request failed with %ld\n",
> - PTR_ERR(dsi->te_gpio));
> + dev_err(dsim->dev, "gpio request failed with %ld\n",
> + PTR_ERR(dsi->te_gpio));
> return PTR_ERR(dsi->te_gpio);
> }
>
> te_gpio_irq = gpiod_to_irq(dsi->te_gpio);
>
> ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL,
> - IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, "TE",
> dsi);
> + IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, "TE",
> + dsim);
> if (ret) {
> - dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
> + dev_err(dsim->dev, "request interrupt failed with %d\n", ret);
> gpiod_put(dsi->te_gpio);
> return ret;
> }
> @@ -1353,128 +85,28 @@ static int exynos_dsi_register_te_irq(struct
> exynos_dsi *dsi,
> return 0;
> }
>
> -static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
> +static void exynos_dsi_unregister_te_irq(struct samsung_dsim *dsim)
> {
> + struct exynos_dsi *dsi = dsim->priv;
> +
> if (dsi->te_gpio) {
> free_irq(gpiod_to_irq(dsi->te_gpio), dsi);
> gpiod_put(dsi->te_gpio);
> }
> }
>
> -static void exynos_dsi_atomic_pre_enable(struct drm_bridge *bridge,
> - struct drm_bridge_state
> *old_bridge_state)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> - int ret;
> -
> - if (dsi->state & DSIM_STATE_ENABLED)
> - return;
> -
> - ret = pm_runtime_resume_and_get(dsi->dev);
> - if (ret < 0) {
> - dev_err(dsi->dev, "failed to enable DSI device.\n");
> - return;
> - }
> -
> - dsi->state |= DSIM_STATE_ENABLED;
> -}
> -
> -static void exynos_dsi_atomic_enable(struct drm_bridge *bridge,
> - struct drm_bridge_state *old_bridge_state)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> -
> - exynos_dsi_set_display_mode(dsi);
> - exynos_dsi_set_display_enable(dsi, true);
> -
> - dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
> -
> - return;
> -}
> -
> -static void exynos_dsi_atomic_disable(struct drm_bridge *bridge,
> - struct drm_bridge_state *old_bridge_state)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> -
> - if (!(dsi->state & DSIM_STATE_ENABLED))
> - return;
> -
> - dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
> -}
> -
> -static void exynos_dsi_atomic_post_disable(struct drm_bridge *bridge,
> - struct drm_bridge_state
> *old_bridge_state)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> -
> - exynos_dsi_set_display_enable(dsi, false);
> -
> - dsi->state &= ~DSIM_STATE_ENABLED;
> - pm_runtime_put_sync(dsi->dev);
> -}
> -
> -static void exynos_dsi_mode_set(struct drm_bridge *bridge,
> - const struct drm_display_mode *mode,
> - const struct drm_display_mode *adjusted_mode)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> -
> - drm_mode_copy(&dsi->mode, adjusted_mode);
> -}
> -
> -static int exynos_dsi_attach(struct drm_bridge *bridge,
> - enum drm_bridge_attach_flags flags)
> -{
> - struct exynos_dsi *dsi = bridge_to_dsi(bridge);
> -
> - return drm_bridge_attach(bridge->encoder, dsi->out_bridge, NULL, flags);
> -}
> -
> -static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
> - .atomic_duplicate_state =
> drm_atomic_helper_bridge_duplicate_state,
> - .atomic_destroy_state =
> drm_atomic_helper_bridge_destroy_state,
> - .atomic_reset = drm_atomic_helper_bridge_reset,
> - .atomic_pre_enable = exynos_dsi_atomic_pre_enable,
> - .atomic_enable = exynos_dsi_atomic_enable,
> - .atomic_disable = exynos_dsi_atomic_disable,
> - .atomic_post_disable = exynos_dsi_atomic_post_disable,
> - .mode_set = exynos_dsi_mode_set,
> - .attach = exynos_dsi_attach,
> -};
> -
> -MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
> -
> -static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
> +static int exynos_dsi_host_attach(struct samsung_dsim *dsim,
> struct mipi_dsi_device *device)
> {
> - struct exynos_dsi *dsi = host_to_dsi(host);
> - struct device *dev = dsi->dev;
> + struct exynos_dsi *dsi = dsim->priv;
> struct drm_encoder *encoder = &dsi->encoder;
> struct drm_device *drm = encoder->dev;
> - struct drm_panel *panel;
> int ret;
>
> - panel = of_drm_find_panel(device->dev.of_node);
> - if (!IS_ERR(panel)) {
> - dsi->out_bridge = devm_drm_panel_bridge_add(dev, panel);
> - } else {
> - dsi->out_bridge = of_drm_find_bridge(device->dev.of_node);
> - if (!dsi->out_bridge)
> - dsi->out_bridge = ERR_PTR(-EINVAL);
> - }
> -
> - if (IS_ERR(dsi->out_bridge)) {
> - ret = PTR_ERR(dsi->out_bridge);
> - DRM_DEV_ERROR(dev, "failed to find the bridge: %d\n", ret);
> - return ret;
> - }
> -
> - DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
> -
> - drm_bridge_add(&dsi->bridge);
> -
> - drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);
> + drm_bridge_attach(encoder, &dsim->bridge,
> + list_first_entry_or_null(&encoder->bridge_chain,
> + struct drm_bridge,
> + chain_node), 0);
The above change a part of dropped "drm: exynos: dsi: Restore proper
bridge chain order" patch, we should keep the current code:
"drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);"
>
> /*
> * This is a temporary solution and should be made by more generic way.
> @@ -1483,18 +115,18 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host
> *host,
> * TE interrupt handler.
> */
> if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) {
> - ret = exynos_dsi_register_te_irq(dsi, &device->dev);
> + ret = exynos_dsi_register_te_irq(dsim, &device->dev);
> if (ret)
> return ret;
> }
>
> mutex_lock(&drm->mode_config.mutex);
>
> - dsi->lanes = device->lanes;
> - dsi->format = device->format;
> - dsi->mode_flags = device->mode_flags;
> + dsim->lanes = device->lanes;
> + dsim->format = device->format;
> + dsim->mode_flags = device->mode_flags;
> exynos_drm_crtc_get_by_type(drm, EXYNOS_DISPLAY_TYPE_LCD)->i80_mode =
> - !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO);
> + !(dsim->mode_flags & MIPI_DSI_MODE_VIDEO);
>
> mutex_unlock(&drm->mode_config.mutex);
>
> @@ -1504,100 +136,34 @@ static int exynos_dsi_host_attach(struct
> mipi_dsi_host *host,
> return 0;
> }
>
> -static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
> +static int exynos_dsi_host_detach(struct samsung_dsim *dsim,
> struct mipi_dsi_device *device)
> {
> - struct exynos_dsi *dsi = host_to_dsi(host);
> + struct exynos_dsi *dsi = dsim->priv;
> struct drm_device *drm = dsi->encoder.dev;
>
> - if (dsi->out_bridge->funcs->detach)
> - dsi->out_bridge->funcs->detach(dsi->out_bridge);
> - dsi->out_bridge = NULL;
> -
> if (drm->mode_config.poll_enabled)
> drm_kms_helper_hotplug_event(drm);
>
> - exynos_dsi_unregister_te_irq(dsi);
> -
> - drm_bridge_remove(&dsi->bridge);
> + exynos_dsi_unregister_te_irq(dsim);
>
> return 0;
> }
>
> -static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
> - const struct mipi_dsi_msg *msg)
> -{
> - struct exynos_dsi *dsi = host_to_dsi(host);
> - struct exynos_dsi_transfer xfer;
> - int ret;
> -
> - if (!(dsi->state & DSIM_STATE_ENABLED))
> - return -EINVAL;
> -
> - if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
> - ret = exynos_dsi_init(dsi);
> - if (ret)
> - return ret;
> - dsi->state |= DSIM_STATE_INITIALIZED;
> - }
> -
> - ret = mipi_dsi_create_packet(&xfer.packet, msg);
> - if (ret < 0)
> - return ret;
> -
> - xfer.rx_len = msg->rx_len;
> - xfer.rx_payload = msg->rx_buf;
> - xfer.flags = msg->flags;
> -
> - ret = exynos_dsi_transfer(dsi, &xfer);
> - return (ret < 0) ? ret : xfer.rx_done;
> -}
> +static int exynos_dsi_register_host(struct samsung_dsim *dsim);
> +static void exynos_dsi_unregister_host(struct samsung_dsim *dsim);
>
> -static const struct mipi_dsi_host_ops exynos_dsi_ops = {
> +static const struct samsung_dsim_host_ops samsung_dsim_exynos_host_ops = {
> + .register_host = exynos_dsi_register_host,
> + .unregister_host = exynos_dsi_unregister_host,
> .attach = exynos_dsi_host_attach,
> .detach = exynos_dsi_host_detach,
> - .transfer = exynos_dsi_host_transfer,
> };
>
> -static int exynos_dsi_of_read_u32(const struct device_node *np,
> - const char *propname, u32 *out_value)
> -{
> - int ret = of_property_read_u32(np, propname, out_value);
> -
> - if (ret < 0)
> - pr_err("%pOF: failed to get '%s' property\n", np, propname);
> -
> - return ret;
> -}
> -
> -static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
> +static int exynos_dsi_bind(struct device *dev, struct device *master, void
> *data)
> {
> - struct device *dev = dsi->dev;
> - struct device_node *node = dev->of_node;
> - int ret;
> -
> - ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency",
> - &dsi->pll_clk_rate);
> - if (ret < 0)
> - return ret;
> -
> - ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",
> - &dsi->burst_clk_rate);
> - if (ret < 0)
> - return ret;
> -
> - ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",
> - &dsi->esc_clk_rate);
> - if (ret < 0)
> - return ret;
> -
> - return 0;
> -}
> -
> -static int exynos_dsi_bind(struct device *dev, struct device *master,
> - void *data)
> -{
> - struct exynos_dsi *dsi = dev_get_drvdata(dev);
> + struct samsung_dsim *dsim = dev_get_drvdata(dev);
> + struct exynos_dsi *dsi = dsim->priv;
> struct drm_encoder *encoder = &dsi->encoder;
> struct drm_device *drm_dev = data;
> int ret;
> @@ -1608,17 +174,16 @@ static int exynos_dsi_bind(struct device *dev, struct
> device *master,
> if (ret < 0)
> return ret;
>
> - return mipi_dsi_host_register(&dsi->dsi_host);
> + return mipi_dsi_host_register(&dsim->dsi_host);
> }
>
> -static void exynos_dsi_unbind(struct device *dev, struct device *master,
> - void *data)
> +static void exynos_dsi_unbind(struct device *dev, struct device *master,
> void *data)
> {
> - struct exynos_dsi *dsi = dev_get_drvdata(dev);
> + struct samsung_dsim *dsim = dev_get_drvdata(dev);
>
> - exynos_dsi_atomic_disable(&dsi->bridge, NULL);
> + dsim->bridge.funcs->atomic_disable(&dsim->bridge, NULL);
>
> - mipi_dsi_host_unregister(&dsi->dsi_host);
> + mipi_dsi_host_unregister(&dsim->dsi_host);
> }
>
> static const struct component_ops exynos_dsi_component_ops = {
> @@ -1626,188 +191,86 @@ static const struct component_ops
> exynos_dsi_component_ops = {
> .unbind = exynos_dsi_unbind,
> };
>
> -static int exynos_dsi_probe(struct platform_device *pdev)
> +static int exynos_dsi_register_host(struct samsung_dsim *dsim)
> {
> - struct device *dev = &pdev->dev;
> - struct exynos_dsi *dsi;
> - int ret, i;
> + struct exynos_dsi *exynos_dsi;
>
> - dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> - if (!dsi)
> + exynos_dsi = devm_kzalloc(dsim->dev, sizeof(*exynos_dsi), GFP_KERNEL);
> + if (!exynos_dsi)
> return -ENOMEM;
>
> - init_completion(&dsi->completed);
> - spin_lock_init(&dsi->transfer_lock);
> - INIT_LIST_HEAD(&dsi->transfer_list);
> + dsim->priv = exynos_dsi;
>
> - dsi->dsi_host.ops = &exynos_dsi_ops;
> - dsi->dsi_host.dev = dev;
> -
> - dsi->dev = dev;
> - dsi->driver_data = of_device_get_match_data(dev);
> -
> - dsi->supplies[0].supply = "vddcore";
> - dsi->supplies[1].supply = "vddio";
> - ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies),
> - dsi->supplies);
> - if (ret)
> - return dev_err_probe(dev, ret, "failed to get regulators\n");
> -
> - dsi->clks = devm_kcalloc(dev,
> - dsi->driver_data->num_clks, sizeof(*dsi->clks),
> - GFP_KERNEL);
> - if (!dsi->clks)
> - return -ENOMEM;
> -
> - for (i = 0; i < dsi->driver_data->num_clks; i++) {
> - dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
> - if (IS_ERR(dsi->clks[i])) {
> - if (strcmp(clk_names[i], "sclk_mipi") == 0) {
> - dsi->clks[i] = devm_clk_get(dev,
> - OLD_SCLK_MIPI_CLK_NAME);
> - if (!IS_ERR(dsi->clks[i]))
> - continue;
> - }
> -
> - dev_info(dev, "failed to get the clock: %s\n",
> - clk_names[i]);
> - return PTR_ERR(dsi->clks[i]);
> - }
> - }
> -
> - dsi->reg_base = devm_platform_ioremap_resource(pdev, 0);
> - if (IS_ERR(dsi->reg_base))
> - return PTR_ERR(dsi->reg_base);
> -
> - dsi->phy = devm_phy_get(dev, "dsim");
> - if (IS_ERR(dsi->phy)) {
> - dev_info(dev, "failed to get dsim phy\n");
> - return PTR_ERR(dsi->phy);
> - }
> -
> - dsi->irq = platform_get_irq(pdev, 0);
> - if (dsi->irq < 0)
> - return dsi->irq;
> -
> - ret = devm_request_threaded_irq(dev, dsi->irq, NULL,
> - exynos_dsi_irq,
> - IRQF_ONESHOT | IRQF_NO_AUTOEN,
> - dev_name(dev), dsi);
> - if (ret) {
> - dev_err(dev, "failed to request dsi irq\n");
> - return ret;
> - }
> -
> - ret = exynos_dsi_parse_dt(dsi);
> - if (ret)
> - return ret;
> -
> - platform_set_drvdata(pdev, dsi);
> -
> - pm_runtime_enable(dev);
> -
> - dsi->bridge.funcs = &exynos_dsi_bridge_funcs;
> - dsi->bridge.of_node = dev->of_node;
> - dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
> -
> - ret = component_add(dev, &exynos_dsi_component_ops);
> - if (ret)
> - goto err_disable_runtime;
> -
> - return 0;
> -
> -err_disable_runtime:
> - pm_runtime_disable(dev);
> -
> - return ret;
> + return component_add(dsim->dev, &exynos_dsi_component_ops);
> }
>
> -static int exynos_dsi_remove(struct platform_device *pdev)
> +static void exynos_dsi_unregister_host(struct samsung_dsim *dsim)
> {
> - pm_runtime_disable(&pdev->dev);
> -
> - component_del(&pdev->dev, &exynos_dsi_component_ops);
> -
> - return 0;
> + component_del(dsim->dev, &exynos_dsi_component_ops);
> }
>
> -static int __maybe_unused exynos_dsi_suspend(struct device *dev)
> -{
> - struct exynos_dsi *dsi = dev_get_drvdata(dev);
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - int ret, i;
> -
> - usleep_range(10000, 20000);
> -
> - if (dsi->state & DSIM_STATE_INITIALIZED) {
> - dsi->state &= ~DSIM_STATE_INITIALIZED;
> -
> - exynos_dsi_disable_clock(dsi);
> -
> - exynos_dsi_disable_irq(dsi);
> - }
> -
> - dsi->state &= ~DSIM_STATE_CMD_LPM;
> -
> - phy_power_off(dsi->phy);
> -
> - for (i = driver_data->num_clks - 1; i > -1; i--)
> - clk_disable_unprepare(dsi->clks[i]);
> -
> - ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> - if (ret < 0)
> - dev_err(dsi->dev, "cannot disable regulators %d\n", ret);
> -
> - return 0;
> -}
> -
> -static int __maybe_unused exynos_dsi_resume(struct device *dev)
> -{
> - struct exynos_dsi *dsi = dev_get_drvdata(dev);
> - const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
> - int ret, i;
> -
> - ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> - if (ret < 0) {
> - dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
> - return ret;
> - }
> -
> - for (i = 0; i < driver_data->num_clks; i++) {
> - ret = clk_prepare_enable(dsi->clks[i]);
> - if (ret < 0)
> - goto err_clk;
> - }
> +static const struct samsung_dsim_plat_data exynos3250_dsi_pdata = {
> + .hw_type = SAMSUNG_DSIM_TYPE_EXYNOS3250,
> + .host_ops = &samsung_dsim_exynos_host_ops,
> + .irq_ops = &samsung_dsim_exynos_host_irq,
> +};
>
> - ret = phy_power_on(dsi->phy);
> - if (ret < 0) {
> - dev_err(dsi->dev, "cannot enable phy %d\n", ret);
> - goto err_clk;
> - }
> +static const struct samsung_dsim_plat_data exynos4210_dsi_pdata = {
> + .hw_type = SAMSUNG_DSIM_TYPE_EXYNOS4210,
> + .host_ops = &samsung_dsim_exynos_host_ops,
> + .irq_ops = &samsung_dsim_exynos_host_irq,
> +};
>
> - return 0;
> +static const struct samsung_dsim_plat_data exynos5410_dsi_pdata = {
> + .hw_type = SAMSUNG_DSIM_TYPE_EXYNOS5410,
> + .host_ops = &samsung_dsim_exynos_host_ops,
> + .irq_ops = &samsung_dsim_exynos_host_irq,
> +};
>
> -err_clk:
> - while (--i > -1)
> - clk_disable_unprepare(dsi->clks[i]);
> - regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
> +static const struct samsung_dsim_plat_data exynos5422_dsi_pdata = {
> + .hw_type = SAMSUNG_DSIM_TYPE_EXYNOS5422,
> + .host_ops = &samsung_dsim_exynos_host_ops,
> + .irq_ops = &samsung_dsim_exynos_host_irq,
> +};
>
> - return ret;
> -}
> +static const struct samsung_dsim_plat_data exynos5433_dsi_pdata = {
> + .hw_type = SAMSUNG_DSIM_TYPE_EXYNOS5433,
> + .host_ops = &samsung_dsim_exynos_host_ops,
> + .irq_ops = &samsung_dsim_exynos_host_irq,
> +};
>
> -static const struct dev_pm_ops exynos_dsi_pm_ops = {
> - SET_RUNTIME_PM_OPS(exynos_dsi_suspend, exynos_dsi_resume, NULL)
> - SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> - pm_runtime_force_resume)
> +static const struct of_device_id exynos_dsi_of_match[] = {
> + {
> + .compatible = "samsung,exynos3250-mipi-dsi",
> + .data = &exynos3250_dsi_pdata,
> + },
> + {
> + .compatible = "samsung,exynos4210-mipi-dsi",
> + .data = &exynos4210_dsi_pdata,
> + },
> + {
> + .compatible = "samsung,exynos5410-mipi-dsi",
> + .data = &exynos5410_dsi_pdata,
> + },
> + {
> + .compatible = "samsung,exynos5422-mipi-dsi",
> + .data = &exynos5422_dsi_pdata,
> + },
> + {
> + .compatible = "samsung,exynos5433-mipi-dsi",
> + .data = &exynos5433_dsi_pdata,
> + },
> + { /* sentinel. */ }
> };
> +MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
>
> struct platform_driver dsi_driver = {
> - .probe = exynos_dsi_probe,
> - .remove = exynos_dsi_remove,
> + .probe = samsung_dsim_probe,
> + .remove = samsung_dsim_remove,
> .driver = {
> .name = "exynos-dsi",
> .owner = THIS_MODULE,
> - .pm = &exynos_dsi_pm_ops,
> + .pm = &samsung_dsim_pm_ops,
> .of_match_table = exynos_dsi_of_match,
> },
> };
> diff --git a/include/drm/bridge/samsung-dsim.h
> b/include/drm/bridge/samsung-dsim.h
> new file mode 100644
> index 000000000000..b8132bf8e36f
> --- /dev/null
> +++ b/include/drm/bridge/samsung-dsim.h
> @@ -0,0 +1,113 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Copyright (C) 2022 Amarula Solutions(India)
> + * Author: Jagan Teki <ja...@amarulasolutions.com>
> + */
> +
> +#ifndef __SAMSUNG_DSIM__
> +#define __SAMSUNG_DSIM__
> +
> +#include <linux/regulator/consumer.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_mipi_dsi.h>
> +
> +struct samsung_dsim;
> +
> +#define DSIM_STATE_ENABLED BIT(0)
> +#define DSIM_STATE_INITIALIZED BIT(1)
> +#define DSIM_STATE_CMD_LPM BIT(2)
> +#define DSIM_STATE_VIDOUT_AVAILABLE BIT(3)
> +
> +enum samsung_dsim_type {
> + SAMSUNG_DSIM_TYPE_EXYNOS3250,
> + SAMSUNG_DSIM_TYPE_EXYNOS4210,
> + SAMSUNG_DSIM_TYPE_EXYNOS5410,
> + SAMSUNG_DSIM_TYPE_EXYNOS5422,
> + SAMSUNG_DSIM_TYPE_EXYNOS5433,
> + SAMSUNG_DSIM_TYPE_IMX8MM,
> + SAMSUNG_DSIM_TYPE_COUNT,
> +};
> +
> +struct samsung_dsim_transfer {
> + struct list_head list;
> + struct completion completed;
> + int result;
> + struct mipi_dsi_packet packet;
> + u16 flags;
> + u16 tx_done;
> +
> + u8 *rx_payload;
> + u16 rx_len;
> + u16 rx_done;
> +};
> +
> +struct samsung_dsim_driver_data {
> + const unsigned int *reg_ofs;
> + unsigned int plltmr_reg;
> + unsigned int has_freqband:1;
> + unsigned int has_clklane_stop:1;
> + unsigned int num_clks;
> + unsigned int max_freq;
> + unsigned int wait_for_reset;
> + unsigned int num_bits_resol;
> + const unsigned int *reg_values;
> +};
> +
> +struct samsung_dsim_host_ops {
> + int (*register_host)(struct samsung_dsim *priv);
> + void (*unregister_host)(struct samsung_dsim *priv);
> + int (*attach)(struct samsung_dsim *priv, struct mipi_dsi_device
> *device);
> + int (*detach)(struct samsung_dsim *priv, struct mipi_dsi_device
> *device);
> +};
> +
> +struct samsung_dsim_irq_ops {
> + void (*enable)(struct samsung_dsim *priv);
> + void (*disable)(struct samsung_dsim *priv);
> +};
> +
> +struct samsung_dsim_plat_data {
> + enum samsung_dsim_type hw_type;
> + const struct samsung_dsim_host_ops *host_ops;
> + const struct samsung_dsim_irq_ops *irq_ops;
> +};
> +
> +struct samsung_dsim {
> + struct mipi_dsi_host dsi_host;
> + struct drm_bridge bridge;
> + struct drm_bridge *out_bridge;
> + struct device *dev;
> + struct drm_display_mode mode;
> +
> + void __iomem *reg_base;
> + struct phy *phy;
> + struct clk **clks;
> + struct regulator_bulk_data supplies[2];
> + int irq;
> +
> + u32 pll_clk_rate;
> + u32 burst_clk_rate;
> + u32 esc_clk_rate;
> + u32 lanes;
> + u32 mode_flags;
> + u32 format;
> +
> + int state;
> + struct drm_property *brightness;
> + struct completion completed;
> +
> + spinlock_t transfer_lock; /* protects transfer_list */
> + struct list_head transfer_list;
> +
> + const struct samsung_dsim_driver_data *driver_data;
> + const struct samsung_dsim_plat_data *plat_data;
> +
> + void *priv;
> +};
> +
> +extern int samsung_dsim_probe(struct platform_device *pdev);
> +extern int samsung_dsim_remove(struct platform_device *pdev);
> +extern const struct dev_pm_ops samsung_dsim_pm_ops;
> +
> +#endif /* __SAMSUNG_DSIM__ */
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
