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@xxxxxxxxxxx>
---
Changes in v2:
- New.
- Split into generic code and 10nm-specific part (Dmitry Baryshkov)
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 3 +++
drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 16 ++++++++++++++++
2 files changed, 19 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..ee3739d 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -739,6 +739,9 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
}
}
+ if (phy->cfg->ops.tuning_cfg_init)
+ phy->cfg->ops.tuning_cfg_init(phy);
+
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..b559a2b 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);
+ void (*tuning_cfg_init)(struct msm_dsi_phy *phy);
};
struct msm_dsi_phy_cfg {
@@ -81,6 +82,20 @@ 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_tuning_cfg - Holds PHY tuning config parameters.
+ * @rescode_offset_top: Offset for pull-up legs rescode.
+ * @rescode_offset_bot: Offset for pull-down legs rescode.
+ * @vreg_ctrl: vreg ctrl to drive LDO level
+ */
+struct msm_dsi_phy_tuning_cfg {
+ u8 rescode_offset_top[DSI_LANE_MAX];
+ u8 rescode_offset_bot[DSI_LANE_MAX];
+ u8 vreg_ctrl;
+};
+
struct msm_dsi_phy {
struct platform_device *pdev;
void __iomem *base;
@@ -98,6 +113,7 @@ struct msm_dsi_phy {
struct msm_dsi_dphy_timing timing;
const struct msm_dsi_phy_cfg *cfg;
+ struct msm_dsi_phy_tuning_cfg tuning_cfg;
enum msm_dsi_phy_usecase usecase;
bool regulator_ldo_mode;
--
2.7.4
