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drm/msm/dp: enhance debug info related to dp phy

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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>
Link: https://lore.kernel.org/r/1643828199-8564-3-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Kuogee Hsieh 2022-02-02 10:56:38 -08:00 committed by Dmitry Baryshkov
parent 78fc35c5d9
commit 2af0fc9260
1 changed files with 10 additions and 10 deletions
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20
drivers/gpu/drm/msm/dp/dp_ctrl.c
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@ -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;
}