diff mbox series

[v3,2/3] drm/msm/dp: enhance debug info related to dp phy

Message ID 1643828199-8564-3-git-send-email-quic_khsieh@quicinc.com (mailing list archive)
State Not Applicable
Headers show
Series Add connector_type to debug info to differentiate between eDP and DP | expand

Commit Message

Kuogee Hsieh Feb. 2, 2022, 6:56 p.m. UTC 
DP phy should be initialized and exited symmetrically to avoid
clock being stucked at either on or off error. Add debug info
to cover all DP phy to identify clock issues easily.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

Comments

Stephen Boyd Feb. 16, 2022, 11:45 p.m. UTC | #1 
Quoting Kuogee Hsieh (2022-02-02 10:56:38)
> DP phy should be initialized and exited symmetrically to avoid
> clock being stucked at either on or off error. Add debug info
> to cover all DP phy to identify clock issues easily.
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 245e1b9..dcd0126 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1396,6 +1396,8 @@  void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_phy_reset(ctrl->catalog);
 	phy_init(phy);
+	DRM_DEBUG_DP("phy=%p init=%d power_on=%d\n",
+			phy, phy->init_count, phy->power_count);
 }
 
 void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl)
@@ -1410,6 +1412,8 @@  void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_phy_reset(ctrl->catalog);
 	phy_exit(phy);
+	DRM_DEBUG_DP("phy=%p init=%d power_on=%d\n",
+			phy, phy->init_count, phy->power_count);
 }
 
 static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl)
@@ -1484,6 +1488,8 @@  static int dp_ctrl_deinitialize_mainlink(struct dp_ctrl_private *ctrl)
 	phy_exit(phy);
 	phy_init(phy);
 
+	DRM_DEBUG_DP("phy=%p init=%d power_on=%d\n",
+			phy, phy->init_count, phy->power_count);
 	return 0;
 }
 
@@ -1895,14 +1901,12 @@  int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 
 	phy_power_off(phy);
 
-	DRM_DEBUG_DP("After, phy=%x init_count=%d power_on=%d\n",
-		(u32)(uintptr_t)phy, phy->init_count, phy->power_count);
-
 	/* aux channel down, reinit phy */
 	phy_exit(phy);
 	phy_init(phy);
 
-	DRM_DEBUG_DP("DP off link/stream done\n");
+	DRM_DEBUG_DP("phy=%p init=%d power_on=%d\n",
+			phy, phy->init_count, phy->power_count);
 	return ret;
 }
 
@@ -1933,13 +1937,9 @@  int dp_ctrl_off(struct dp_ctrl *dp_ctrl)
 		DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret);
 	}
 
-	DRM_DEBUG_DP("Before, phy=%x init_count=%d power_on=%d\n",
-		(u32)(uintptr_t)phy, phy->init_count, phy->power_count);
-
 	phy_power_off(phy);
-
-	DRM_DEBUG_DP("After, phy=%x init_count=%d power_on=%d\n",
-		(u32)(uintptr_t)phy, phy->init_count, phy->power_count);
+	DRM_DEBUG_DP("phy=%p init=%d power_on=%d\n",
+			phy, phy->init_count, phy->power_count);
 
 	return ret;
 }