Il 23/05/22 12:47, Guillaume Ranquet ha scritto:
dpintf is the displayport interface hardware unit. This unit is similar
to dpi and can reuse most of the code.
This patch adds support for mt8195-dpintf to this dpi driver. Main
differences are:
- Some features/functional components are not available for dpintf
which are now excluded from code execution once is_dpintf is set
- dpintf can and needs to choose between different clockdividers based
on the clockspeed. This is done by choosing a different clock parent.
- There are two additional clocks that need to be managed. These are
only set for dpintf and will be set to NULL if not supplied. The
clk_* calls handle these as normal clocks then.
- Some register contents differ slightly between the two components. To
work around this I added register bits/masks with a DPINTF_ prefix
and use them where different.
Based on a separate driver for dpintf created by
Jason-JH.Lin <jason-jh....@mediatek.com>.
Only after finishing the review, I've noticed that I just wrote the same things
that I wrote in my review for version 8... and if I recall correctly, this is
not
the first time that something like that happens.
Please pay attention to what reviewers say, as to not waste anyone's time.
Signed-off-by: Markus Schneider-Pargmann <m...@baylibre.com>
Signed-off-by: Guillaume Ranquet <granq...@baylibre.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 126 +++++++++++++++++---
drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 35 ++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 ++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
include/linux/soc/mediatek/mtk-mmsys.h | 4 +-
6 files changed, 159 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
b/drivers/gpu/drm/mediatek/mtk_dpi.c
index eb969c5c5c2e..763bfb700135 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -71,6 +71,7 @@ struct mtk_dpi {
void __iomem *regs;
struct device *dev;
struct clk *engine_clk;
+ struct clk *dpi_ck_cg;
struct clk *pixel_clk;
struct clk *tvd_clk;
int irq;
@@ -126,6 +127,7 @@ struct mtk_dpi_conf {
const u32 *output_fmts;
u32 num_output_fmts;
bool is_ck_de_pol;
+ bool is_dpintf;
bool swap_input_support;
/* Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
*/
u32 dimension_mask;
@@ -438,6 +440,8 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
mtk_dpi_disable(dpi);
clk_disable_unprepare(dpi->pixel_clk);
clk_disable_unprepare(dpi->engine_clk);
+ clk_disable_unprepare(dpi->dpi_ck_cg);
+ clk_disable_unprepare(dpi->tvd_clk);
}
static int mtk_dpi_power_on(struct mtk_dpi *dpi)
@@ -447,12 +451,24 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
if (++dpi->refcount != 1)
return 0;
+ ret = clk_prepare_enable(dpi->tvd_clk);
+ if (ret) {
+ dev_err(dpi->dev, "Failed to enable tvd pll: %d\n", ret);
+ goto err_pixel;
+ }
+
ret = clk_prepare_enable(dpi->engine_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
goto err_refcount;
}
+ ret = clk_prepare_enable(dpi->dpi_ck_cg);
+ if (ret) {
+ dev_err(dpi->dev, "Failed to enable dpi_ck_cg clock: %d\n",
ret);
+ goto err_ck_cg;
+ }
+
ret = clk_prepare_enable(dpi->pixel_clk);
if (ret) {
dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
@@ -466,6 +482,8 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
return 0;
err_pixel:
+ clk_disable_unprepare(dpi->dpi_ck_cg);
+err_ck_cg:
clk_disable_unprepare(dpi->engine_clk);
err_refcount:
dpi->refcount--;
@@ -498,11 +516,11 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
vm.pixelclock = pll_rate / factor;
if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
- (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
+ (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
The indentation was perfect before that change...
clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
- else
+ } else {
clk_set_rate(dpi->pixel_clk, vm.pixelclock);
-
+ }
vm.pixelclock = clk_get_rate(dpi->pixel_clk);
@@ -515,9 +533,15 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
- hsync.sync_width = vm.hsync_len;
- hsync.back_porch = vm.hback_porch;
- hsync.front_porch = vm.hfront_porch;
+ if (dpi->conf->is_dpintf) {
+ hsync.sync_width = vm.hsync_len / 4;
+ hsync.back_porch = vm.hback_porch / 4;
+ hsync.front_porch = vm.hfront_porch / 4;
+ } else {
+ hsync.sync_width = vm.hsync_len;
+ hsync.back_porch = vm.hback_porch;
+ hsync.front_porch = vm.hfront_porch;
+ }
This looks way better:
hsync.sync_width = vm.hsync_len;
hsync.back_porch = vm.hback_porch;
hsync.front_porch = vm.hfront_porch;
/* For DPINTF, we need to divide everything by 4 .. lanes? */
if (dpi->conf->is_dpintf) {
hsync.sync_width /= 4;
hsync.back_porch /= 4;
hsync.front_porch /= 4;
}
hsync.shift_half_line = false;
vsync_lodd.sync_width = vm.vsync_len;
vsync_lodd.back_porch = vm.vback_porch;
@@ -559,13 +583,20 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
mtk_dpi_config_channel_limit(dpi);
mtk_dpi_config_bit_num(dpi, dpi->bit_num);
mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
- mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
- mtk_dpi_config_2n_h_fre(dpi);
- mtk_dpi_dual_edge(dpi);
- mtk_dpi_config_disable_edge(dpi);
+ if (dpi->conf->is_dpintf) {
+ mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
+ DPINTF_INPUT_2P_EN);
+ } else {
+ mtk_dpi_config_yc_map(dpi, dpi->yc_map);
+ mtk_dpi_config_2n_h_fre(dpi);
+ mtk_dpi_dual_edge(dpi);
+ mtk_dpi_config_disable_edge(dpi);
+ }
mtk_dpi_sw_reset(dpi, false);
+ mtk_dpi_enable(dpi);
+
return 0;
}
@@ -608,7 +639,6 @@ static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
u32 *input_fmts;
*num_input_fmts = 0;
-
Removing this line is not part of adding dpintf support, so don't do that.
input_fmts = kcalloc(1, sizeof(*input_fmts),
GFP_KERNEL);
if (!input_fmts)
@@ -634,15 +664,18 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge
*bridge,
if (dpi->conf->num_output_fmts)
out_bus_format = dpi->conf->output_fmts[0];
- dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
- bridge_state->input_bus_cfg.format,
- bridge_state->output_bus_cfg.format);
+ dev_info(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
+ bridge_state->input_bus_cfg.format,
+ bridge_state->output_bus_cfg.format);
This message is not giving any constantly changing information, nor any one that
is interesting for the user: keep this as dev_dbg().
dpi->output_fmt = out_bus_format;
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
- dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
+ if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
+ else
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
return 0;
}
@@ -687,7 +720,7 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
{
struct mtk_dpi *dpi = bridge_to_dpi(bridge);
- if (mode->clock > dpi->conf->max_clock_khz)
+ if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
return MODE_CLOCK_HIGH;
return MODE_OK;
@@ -801,6 +834,16 @@ static unsigned int mt8183_calculate_factor(int clock)
return 2;
}
+static unsigned int mt8195_dpintf_calculate_factor(int clock)
+{
+ if (clock < 70000)
is 70000 intentional? Or did you mean 700000?
+ return 4;
+ else if (clock < 200000)
+ return 2;
+ else
+ return 1;
+}
+
static const u32 mt8173_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_1X24,
};
@@ -810,6 +853,12 @@ static const u32 mt8183_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_2X12_BE,
};
+static const u32 mt8195_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_YUV8_1X24,
+ MEDIA_BUS_FMT_YUYV8_1X16,
+};
+
static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.c_bottom = 0x0010,
.c_top = 0x0FE0,
@@ -817,6 +866,13 @@ static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.y_top = 0x0FE0,
};
+static const struct mtk_dpi_yc_limit mtk_dpintf_limit = {
+ .c_bottom = 0x0000,
+ .c_top = 0xFFF,
+ .y_bottom = 0x0000,
+ .y_top = 0xFFF,
+};
+
static const struct mtk_dpi_conf mt8173_conf = {
.cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
@@ -882,6 +938,19 @@ static const struct mtk_dpi_conf mt8192_conf = {
.limit = &mtk_dpi_limit,
};
+static const struct mtk_dpi_conf mt8195_dpintf_conf = {
+ .cal_factor = mt8195_dpintf_calculate_factor,
+ .output_fmts = mt8195_output_fmts,
+ .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
+ .is_dpintf = true,
+ .dimension_mask = DPINTF_HPW_MASK,
+ .hvsize_mask = DPINTF_HSIZE_MASK,
+ .channel_swap_shift = DPINTF_CH_SWAP,
+ .yuv422_en_bit = DPINTF_YUV422_EN,
+ .csc_enable_bit = DPINTF_CSC_ENABLE,
+ .limit = &mtk_dpintf_limit,
+};
+
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -929,7 +998,27 @@ static int mtk_dpi_probe(struct platform_device *pdev)
if (IS_ERR(dpi->engine_clk)) {
ret = PTR_ERR(dpi->engine_clk);
if (ret != -EPROBE_DEFER)
- dev_err(dev, "Failed to get engine clock: %d\n", ret);
+ dev_err(dev, "Failed to get engine clock: %d\n",
+ ret);
Why are you breaking this line?
+
+ return ret;
+ }
+
+ dpi->dpi_ck_cg = devm_clk_get_optional(dev, "ck_cg");
+ if (IS_ERR(dpi->dpi_ck_cg)) {
+ ret = PTR_ERR(dpi->dpi_ck_cg);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Failed to get dpi ck cg clock: %d\n",
+ ret);
+
+ return ret;
+ }
+
You're getting this clock twice, what happened here?
P.S.: As I explained on the dt-bindings patch, you likely don't even need this
clock at all.
+ dpi->dpi_ck_cg = devm_clk_get_optional(dev, "ck_cg");
+ if (IS_ERR(dpi->dpi_ck_cg)) {
+ ret = PTR_ERR(dpi->dpi_ck_cg);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Failed to get dpi ck cg clock: %d\n",
ret);
return ret;
}
@@ -1004,6 +1093,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
{ .compatible = "mediatek,mt8192-dpi",
.data = &mt8192_conf,
},
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = &mt8195_dpintf_conf,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
index 3a02fabe1662..dd47dd3f2e4f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
+++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
@@ -40,10 +40,15 @@
#define FAKE_DE_LEVEN BIT(21)
#define FAKE_DE_RODD BIT(22)
#define FAKE_DE_REVEN BIT(23)
+#define DPINTF_YUV422_EN BIT(24)
+#define DPINTF_CSC_ENABLE BIT(26)
+#define DPINTF_INPUT_2P_EN BIT(29)
#define DPI_OUTPUT_SETTING 0x14
#define CH_SWAP 0
+#define DPINTF_CH_SWAP BIT(1)
#define CH_SWAP_MASK (0x7 << 0)
+#define DPINTF_CH_SWAP_MASK (0x7 << 1)
#define SWAP_RGB 0x00
#define SWAP_GBR 0x01
#define SWAP_BRG 0x02
@@ -80,8 +85,10 @@
#define DPI_SIZE 0x18
#define HSIZE 0
#define HSIZE_MASK (0x1FFF << 0)
+#define DPINTF_HSIZE_MASK (0xFFFF << 0)
#define VSIZE 16
#define VSIZE_MASK (0x1FFF << 16)
+#define DPINTF_VSIZE_MASK (0xFFFF << 16)
#define DPI_DDR_SETTING 0x1C
#define DDR_EN BIT(0)
@@ -93,24 +100,30 @@
#define DPI_TGEN_HWIDTH 0x20
#define HPW 0
#define HPW_MASK (0xFFF << 0)
+#define DPINTF_HPW_MASK (0xFFFF << 0)
#define DPI_TGEN_HPORCH 0x24
#define HBP 0
#define HBP_MASK (0xFFF << 0)
+#define DPINTF_HBP_MASK (0xFFFF << 0)
#define HFP 16
#define HFP_MASK (0xFFF << 16)
+#define DPINTF_HFP_MASK (0xFFFF << 16)
#define DPI_TGEN_VWIDTH 0x28
#define DPI_TGEN_VPORCH 0x2C
#define VSYNC_WIDTH_SHIFT 0
#define VSYNC_WIDTH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_WIDTH_MASK (0xFFFF << 0)
#define VSYNC_HALF_LINE_SHIFT 16
#define VSYNC_HALF_LINE_MASK BIT(16)
#define VSYNC_BACK_PORCH_SHIFT 0
#define VSYNC_BACK_PORCH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_BACK_PORCH_MASK (0xFFFF << 0)
#define VSYNC_FRONT_PORCH_SHIFT 16
#define VSYNC_FRONT_PORCH_MASK (0xFFF << 16)
+#define DPINTF_VSYNC_FRONT_PORCH_MASK (0xFFFF << 16)
#define DPI_BG_HCNTL 0x30
#define BG_RIGHT (0x1FFF << 0)
@@ -217,4 +230,26 @@
#define EDGE_SEL_EN BIT(5)
#define H_FRE_2N BIT(25)
+
+#define RGB_TO_JPEG 0x00
This is 0x0
+#define RGB_TO_FULL709 0x01
0x1
+#define RGB_TO_BT601 0x02
0x2
...remove the unnecessary leading zeros, but... you're not ever
using this set of definitions, so why are you even adding them?
+#define RGB_TO_BT709 0x03
+#define JPEG_TO_RGB 0x04
+#define FULL709_TO_RGB 0x05
+#define BT601_TO_RGB 0x06
+#define BT709_TO_RGB 0x07
+#define JPEG_TO_BT601 0x08
+#define JPEG_TO_BT709 0x09
+#define BT601_TO_JPEG 0xA
+#define BT709_TO_JPEG 0xB
+#define BT709_TO_BT601 0xC
+#define BT601_TO_BT709 0xD
+#define JPEG_TO_CERGB 0x14
+#define FULL709_TO_CERGB 0x15
+#define BT601_TO_CERGB 0x16
+#define BT709_TO_CERGB 0x17
+#define RGB_TO_CERGB 0x1C
+#define MATRIX_BIT BIT(8)
+#define EXT_MATRIX_EN BIT(12)
#endif /* __MTK_DPI_REGS_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 245d0074e12d..3738665a712e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -419,6 +419,11 @@ static const char * const
mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DISP_WDMA] = "wdma",
[MTK_DPI] = "dpi",
[MTK_DSI] = "dsi",
+ [MTK_DP_INTF] = "dp-intf",
+ [MTK_DISP_PWM] = "pwm",
+ [MTK_DISP_MUTEX] = "mutex",
+ [MTK_DISP_OD] = "od",
+ [MTK_DISP_BLS] = "bls",
Please keep alphabetic order.
};
struct mtk_ddp_comp_match {
@@ -439,6 +444,8 @@ static const struct mtk_ddp_comp_match
mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DPI1] = { MTK_DPI, 1,
&ddp_dpi },
[DDP_COMPONENT_DSC0] = { MTK_DISP_DSC, 0,
&ddp_dsc },
[DDP_COMPONENT_DSC1] = { MTK_DISP_DSC, 1,
&ddp_dsc },
+ [DDP_COMPONENT_DP_INTF0] = { MTK_DP_INTF, 0, &ddp_dpi },
+ [DDP_COMPONENT_DP_INTF1] = { MTK_DP_INTF, 1, &ddp_dpi },
Indentation issue. Fix it.
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0,
&ddp_dsi },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1,
&ddp_dsi },
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2,
&ddp_dsi },
@@ -565,6 +572,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct
mtk_ddp_comp *comp,
type == MTK_DISP_PWM ||
type == MTK_DISP_RDMA ||
type == MTK_DPI ||
+ type == MTK_DP_INTF ||
type == MTK_DSI)
return 0;
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 825d763d2378..c4e683f46a95 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -37,6 +37,7 @@ enum mtk_ddp_comp_type {
MTK_DISP_UFOE,
MTK_DISP_WDMA,
MTK_DPI,
+ MTK_DP_INTF,
MTK_DSI,
MTK_DDP_COMP_TYPE_MAX,
};
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index a2a783fc580e..e25ac61aac08 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -690,6 +690,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
.data = (void *)MTK_DPI },
{ .compatible = "mediatek,mt8183-dpi",
.data = (void *)MTK_DPI },
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = (void *)MTK_DP_INTF },
{ .compatible = "mediatek,mt2701-dsi",
.data = (void *)MTK_DSI },
{ .compatible = "mediatek,mt8173-dsi",
@@ -801,8 +803,9 @@ static int mtk_drm_probe(struct platform_device *pdev)
comp_type == MTK_DISP_OVL_2L ||
comp_type == MTK_DISP_OVL_ADAPTOR ||
comp_type == MTK_DISP_RDMA ||
+ comp_type == MTK_DSI ||
comp_type == MTK_DPI ||
- comp_type == MTK_DSI) {
+ comp_type == MTK_DP_INTF) {
These were nice and alphabetically ordered, why are you moving MTK_DSI up
there?!
comp_type == MTK_DISP_RDMA ||
comp_type == MTK_DP_INTF ||
comp_type == MTK_DPI ||
comp_type == MTK_DSI) {
... that's how it should look like.
dev_info(dev, "Adding component match for %pOF\n",
node);
drm_of_component_match_add(dev, &match,
component_compare_of,
diff --git a/include/linux/soc/mediatek/mtk-mmsys.h
b/include/linux/soc/mediatek/mtk-mmsys.h
index 3e998bfb795a..e4b84c347201 100644
--- a/include/linux/soc/mediatek/mtk-mmsys.h
+++ b/include/linux/soc/mediatek/mtk-mmsys.h
@@ -21,12 +21,12 @@ enum mtk_ddp_comp_id {
DDP_COMPONENT_COLOR0,
DDP_COMPONENT_COLOR1,
DDP_COMPONENT_DITHER,
- DDP_COMPONENT_DP_INTF0,
- DDP_COMPONENT_DP_INTF1,
DDP_COMPONENT_DPI0,
DDP_COMPONENT_DPI1,
DDP_COMPONENT_DSC0,
DDP_COMPONENT_DSC1,
+ DDP_COMPONENT_DP_INTF0,
+ DDP_COMPONENT_DP_INTF1,
Why are you moving this?!
DDP_COMPONENT_DSI0,
DDP_COMPONENT_DSI1,
DDP_COMPONENT_DSI2,
