Re: [PATCH v3 07/15] drm/bridge: analogix_dp: Add support for phy configuration.

On Fri Dec 20, 2024 at 1:13 AM CET, Dmitry Baryshkov wrote:

On Thu, Dec 19, 2024 at 04:05:56PM +0800, Damon Ding wrote:

quoted

 void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count)

@@ -546,10 +575,37 @@ void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count)
 void analogix_dp_set_lane_link_training(struct analogix_dp_device *dp)
 {
 	u8 lane;
+	int ret;
 
 	for (lane = 0; lane < dp->link_train.lane_count; lane++)
 		writel(dp->link_train.training_lane[lane],
 		       dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL + 4 * lane);
+
+	if (dp->phy) {
+		union phy_configure_opts phy_cfg = {0};
+
+		for (lane = 0; lane < dp->link_train.lane_count; lane++) {
+			u8 training_lane = dp->link_train.training_lane[lane];
+			u8 vs, pe;
+
+			vs = (training_lane & DP_TRAIN_VOLTAGE_SWING_MASK) >>
+			     DP_TRAIN_VOLTAGE_SWING_SHIFT;
+			pe = (training_lane & DP_TRAIN_PRE_EMPHASIS_MASK) >>
+			     DP_TRAIN_PRE_EMPHASIS_SHIFT;
+			phy_cfg.dp.voltage[lane] = vs;
+			phy_cfg.dp.pre[lane] = pe;
+		}
+
+		phy_cfg.dp.lanes = dp->link_train.lane_count;
+		phy_cfg.dp.link_rate =
+			drm_dp_bw_code_to_link_rate(dp->link_train.link_rate) / 100;

This two should not be necessary, please drop them.

This too or These two (statements)?

quoted

+		phy_cfg.dp.set_voltages = true;
+		ret = phy_configure(dp->phy, &phy_cfg);
+		if (ret && ret != -EOPNOTSUPP) {
+			dev_err(dp->dev, "%s: phy_configure() failed: %d\n", __func__, ret);
+			return;
+		}
+	}
 }
 
 u32 analogix_dp_get_lane_link_training(struct analogix_dp_device *dp, u8 lane)
-- 
2.34.1