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SubjectRe: [PATCH] drm/msm/dp: add connector type to enhance debug messages
Quoting Kuogee Hsieh (2022-01-24 14:44:52)
> DP driver is a generic driver which supports both eDP and DP.
> For debugging purpose it is required to have capabilities to
> differentiate message are generated from eDP or DP. This patch
> add connector type into debug messages for this purpose.
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---
> drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 +++++------
> drivers/gpu/drm/msm/dp/dp_display.c | 71 ++++++++++++++++++++++++++-----------
> 2 files changed, 60 insertions(+), 31 deletions(-)
>
> 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;
> }
>

These are entirely new messages. Adding messages isn't mentioned in the
commit text. Please either split this out or indicate in the commit text
what's going on here.

> @@ -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",

The DRM_DEBUG_DP macro says it's deprecated now and we should use
drm_dbg_dp() instead. Can you use that macro instead? Then it looks like
drm->dev can actually be any old struct device, so I guess we're allowed
to pass in the particular instance of dp device this is for. Allowing us
to figure out which DP device is actually printing messages.

> + phy, phy->init_count, phy->power_count);
> return ret;
> }
>

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