Add bitfields for PHY_CMN_CLK_CFG0 and PHY_CMN_CLK_CFG1 registers to
avoid hard-coding bit masks and shifts and make the code a bit more
readable. While touching the lines in dsi_7nm_pll_save_state()
resulting cached->pix_clk_div assignment would be too big, so just
combine pix_clk_div and bit_clk_div into one cached state to make
everything simpler.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlow...@linaro.org>
---
Changes in v4:
1. Add mising bitfield.h include
2. One more FIELD_GET and DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL (Dmitry)
Changes in v3:
1. Use FIELD_GET
2. Keep separate bit_clk_div and pix_clk_div
3. Rebase (some things moved to previous patches)
Changes in v2:
1. New patch
---
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 13 ++++++++-----
drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml | 1 +
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
index
798168180c1ab6c96ec2384f854302720cb27932..cf63b4c5c3c0c39f0031dbe948b1694765f01af8
100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
@@ -3,6 +3,7 @@
* Copyright (c) 2018, The Linux Foundation
*/
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/iopoll.h>
@@ -572,11 +573,11 @@ static void dsi_7nm_pll_save_state(struct msm_dsi_phy
*phy)
cached->pll_out_div &= 0x3;
cmn_clk_cfg0 = readl(phy_base + REG_DSI_7nm_PHY_CMN_CLK_CFG0);
- cached->bit_clk_div = cmn_clk_cfg0 & 0xf;
- cached->pix_clk_div = (cmn_clk_cfg0 & 0xf0) >> 4;
+ cached->bit_clk_div =
FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_3_0__MASK, cmn_clk_cfg0);
+ cached->pix_clk_div =
FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_7_4__MASK, cmn_clk_cfg0);
cmn_clk_cfg1 = readl(phy_base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
- cached->pll_mux = cmn_clk_cfg1 & 0x3;
+ cached->pll_mux = FIELD_GET(DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK,
cmn_clk_cfg1);
DBG("DSI PLL%d outdiv %x bit_clk_div %x pix_clk_div %x pll_mux %x",
pll_7nm->phy->id, cached->pll_out_div, cached->bit_clk_div,
@@ -598,7 +599,8 @@ static int dsi_7nm_pll_restore_state(struct msm_dsi_phy
*phy)
dsi_pll_cmn_clk_cfg0_write(pll_7nm,
DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_3_0(cached->bit_clk_div) |
DSI_7nm_PHY_CMN_CLK_CFG0_DIV_CTRL_7_4(cached->pix_clk_div));
- dsi_pll_cmn_clk_cfg1_update(pll_7nm, 0x3, cached->pll_mux);
+ dsi_pll_cmn_clk_cfg1_update(pll_7nm,
DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL__MASK,
+ cached->pll_mux);
ret = dsi_pll_7nm_vco_set_rate(phy->vco_hw,
pll_7nm->vco_current_rate,
@@ -739,7 +741,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm,
struct clk_hw **provide
u32 data;
data = readl(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
- writel(data | 3, pll_7nm->phy->base +
REG_DSI_7nm_PHY_CMN_CLK_CFG1);
+ writel(data | DSI_7nm_PHY_CMN_CLK_CFG1_DSICLK_SEL(3),
+ pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
phy_pll_out_dsi_parent = pll_post_out_div;
} else {
diff --git a/drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml
b/drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml
index
35f7f40e405b7dd9687725eae754522a7136725e..d2c8c46bb04159da6e539bfe80a4b5dc9ffdf367
100644
--- a/drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml
+++ b/drivers/gpu/drm/msm/registers/display/dsi_phy_7nm.xml
@@ -17,6 +17,7 @@ xsi:schemaLocation="https://gitlab.freedesktop.org/freedreno/
rules-fd.xsd">
<bitfield name="CLK_EN" pos="5" type="boolean"/>
<bitfield name="CLK_EN_SEL" pos="4" type="boolean"/>
<bitfield name="BITCLK_SEL" low="2" high="3" type="uint"/>
+ <bitfield name="DSICLK_SEL" low="0" high="1" type="uint"/>
</reg32>
<reg32 offset="0x00018" name="GLBL_CTRL"/>
<reg32 offset="0x0001c" name="RBUF_CTRL"/>
--
2.43.0
