[PATCH 1/2] drm/msm/dp: fix runtime PM leak on disconnect

[Abhinav Kumar]

On 3/13/2024 9:43 AM, Johan Hovold wrote:
> Make sure to put the runtime PM usage count (and suspend) also when
> receiving a disconnect event while in the ST_MAINLINK_READY state.
> 
> This specifically avoids leaking a runtime PM usage count on every
> disconnect with display servers that do not automatically enable
> external displays when receiving a hotplug notification.
> 

Thanks for the fixes. Both look right to me.

I will pick up both of them for -fixes

Reviewed-by: Abhinav Kumar <quic_abhinavk at quicinc.com>



> Fixes: 5814b8bf086a ("drm/msm/dp: incorporate pm_runtime framework into DP driver")
> Cc: stable at vger.kernel.org      # 6.8
> Cc: Kuogee Hsieh <quic_khsieh at quicinc.com>
> Signed-off-by: Johan Hovold <johan+linaro at kernel.org>
> ---
>   drivers/gpu/drm/msm/dp/dp_display.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 4c72124ffb5d..8e8cf531da45 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -655,6 +655,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
>   		dp_display_host_phy_exit(dp);
>   		dp->hpd_state = ST_DISCONNECTED;
>   		dp_display_notify_disconnect(&dp->dp_display.pdev->dev);
> +		pm_runtime_put_sync(&pdev->dev);
>   		mutex_unlock(&dp->event_mutex);
>   		return 0;
>   	}