Add support for MSM DSI PHY tuning configuration. Current design is to support drive strength and drive level/amplitude tuning for 10nm PHY version, but this can be extended to other PHY versions.
Signed-off-by: Rajeev Nandan quic_rajeevny@quicinc.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org ---
Changes in v2: - New. - Split into generic code and 10nm-specific part (Dmitry Baryshkov)
Changes in v3: - s/ops.tuning_cfg_init/ops.parse_dt_properties To parse phy version specific DT properties (Dmitry Baryshkov) - Address comments for phy tuning data structure (Dmitry Baryshkov)
Changes in v4: - None
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 6 ++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 4 ++++ 2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c index 8c65ef6..fcbca76 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c @@ -739,6 +739,12 @@ static int dsi_phy_driver_probe(struct platform_device *pdev) } }
+ if (phy->cfg->ops.parse_dt_properties) { + ret = phy->cfg->ops.parse_dt_properties(phy); + if (ret) + goto fail; + } + ret = dsi_phy_regulator_init(phy); if (ret) goto fail; diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h index b91303a..9e08081 100644 --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h @@ -25,6 +25,7 @@ struct msm_dsi_phy_ops { void (*save_pll_state)(struct msm_dsi_phy *phy); int (*restore_pll_state)(struct msm_dsi_phy *phy); bool (*set_continuous_clock)(struct msm_dsi_phy *phy, bool enable); + int (*parse_dt_properties)(struct msm_dsi_phy *phy); };
struct msm_dsi_phy_cfg { @@ -81,6 +82,8 @@ struct msm_dsi_dphy_timing { #define DSI_PIXEL_PLL_CLK 1 #define NUM_PROVIDED_CLKS 2
+#define DSI_LANE_MAX 5 + struct msm_dsi_phy { struct platform_device *pdev; void __iomem *base; @@ -98,6 +101,7 @@ struct msm_dsi_phy {
struct msm_dsi_dphy_timing timing; const struct msm_dsi_phy_cfg *cfg; + void *tuning_cfg;
enum msm_dsi_phy_usecase usecase; bool regulator_ldo_mode;