From: Michael Trimarchi <michael@amarulasolutions.com>

The shutdown function can be called when the display is already
unprepared. For example during reboot this trigger a kernel
backlog. Calling the drm_panel_unprepare, allow us to avoid
to trigger the kernel warning.

Fixes: 2e87bad7cd33 ("drm/panel: Add Synaptics R63353 panel driver")
Tested-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

---

Changes in v2:
- Add 'Fixes' tag.
- Add 'Reviewed-by' tag of Neil Armstrong.

 drivers/gpu/drm/panel/panel-synaptics-r63353.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-synaptics-r63353.c b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
index 169c629746c7..17349825543f 100644
--- a/drivers/gpu/drm/panel/panel-synaptics-r63353.c
+++ b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
@@ -325,7 +325,7 @@ static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
 {
 	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
 
-	r63353_panel_unprepare(&rpanel->base);
+	drm_panel_unprepare(&rpanel->base);
 }
 
 static const struct r63353_desc sharp_ls068b3sx02_data = {
-- 
2.43.0

Hi,

On Thu, 05 Dec 2024 17:29:58 +0100, Dario Binacchi wrote:
> The shutdown function can be called when the display is already
> unprepared. For example during reboot this trigger a kernel
> backlog. Calling the drm_panel_unprepare, allow us to avoid
> to trigger the kernel warning.
> 
> 

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-fixes)

[1/1] drm/panel: synaptics-r63353: Fix regulator unbalance
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/d2bd3fcb825725a59c8880070b1206b1710922bd

-- 
Neil

On 12/5/2024 8:29 AM, Dario Binacchi wrote:
> From: Michael Trimarchi <michael@amarulasolutions.com>
> 
> The shutdown function can be called when the display is already
> unprepared. For example during reboot this trigger a kernel
> backlog. Calling the drm_panel_unprepare, allow us to avoid
> to trigger the kernel warning.
> 
> Fixes: 2e87bad7cd33 ("drm/panel: Add Synaptics R63353 panel driver")
> Tested-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
> Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>

> 
> ---
> 
> Changes in v2:
> - Add 'Fixes' tag.
> - Add 'Reviewed-by' tag of Neil Armstrong.
> 
>   drivers/gpu/drm/panel/panel-synaptics-r63353.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-synaptics-r63353.c b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
> index 169c629746c7..17349825543f 100644
> --- a/drivers/gpu/drm/panel/panel-synaptics-r63353.c
> +++ b/drivers/gpu/drm/panel/panel-synaptics-r63353.c
> @@ -325,7 +325,7 @@ static void r63353_panel_shutdown(struct mipi_dsi_device *dsi)
>   {
>   	struct r63353_panel *rpanel = mipi_dsi_get_drvdata(dsi);
>   
> -	r63353_panel_unprepare(&rpanel->base);
> +	drm_panel_unprepare(&rpanel->base);
>   }
>   
>   static const struct r63353_desc sharp_ls068b3sx02_data = {
> -- 
> 2.43.0
>