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>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
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;
--
2.7.4
