From 2af0fc926096255a4c5a468508e8db844c77499e Mon Sep 17 00:00:00 2001 From: Kuogee Hsieh Date: Wed, 2 Feb 2022 10:56:38 -0800 Subject: [PATCH] drm/msm/dp: enhance debug info related to dp phy 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 Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1643828199-8564-3-git-send-email-quic_khsieh@quicinc.com Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 245e1b90a956f..dcd01262910bf 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; } -- 2.30.2