Make the clock frequency match what the sdm845 downstream kernel
uses. Otherwise the panel stays black.

Fixes: 783334f366b18 ("drm/panel: visionox-rm69299: support the variant found in the SHIFT6mq")
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/gpu/drm/panel/panel-visionox-rm69299.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
index 909c280eab1fb408a713d84051a1afbb252c45e8..e65697ce6f51c7d64b786da18cf44b16de5d6919 100644
--- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -247,7 +247,7 @@ static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
 };
 
 static const struct drm_display_mode visionox_rm69299_1080x2160_60hz = {
-	.clock = 158695,
+	.clock = 149360,
 	.hdisplay = 1080,
 	.hsync_start = 1080 + 26,
 	.hsync_end = 1080 + 26 + 2,

-- 
2.51.0

On Sat, Sep 06, 2025 at 05:17:25PM +0200, Guido Günther wrote:
> Make the clock frequency match what the sdm845 downstream kernel
> uses. Otherwise the panel stays black.
> 
> Fixes: 783334f366b18 ("drm/panel: visionox-rm69299: support the variant found in the SHIFT6mq")
> Signed-off-by: Guido Günther <agx@sigxcpu.org>
> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
>  drivers/gpu/drm/panel/panel-visionox-rm69299.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> index 909c280eab1fb408a713d84051a1afbb252c45e8..e65697ce6f51c7d64b786da18cf44b16de5d6919 100644
> --- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> +++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> @@ -247,7 +247,7 @@ static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
>  };
>  
>  static const struct drm_display_mode visionox_rm69299_1080x2160_60hz = {
> -	.clock = 158695,
> +	.clock = 149360,

clock = (2160 + 8 + 4 + 4) * (1080 + 26 + 2 + 36) * 60 / 1000 ?

>  	.hdisplay = 1080,
>  	.hsync_start = 1080 + 26,
>  	.hsync_end = 1080 + 26 + 2,
> 
> -- 
> 2.51.0
> 

-- 
With best wishes
Dmitry

Hi Dmitry,
On Sat, Sep 06, 2025 at 10:08:35PM +0300, Dmitry Baryshkov wrote:
> On Sat, Sep 06, 2025 at 05:17:25PM +0200, Guido Günther wrote:
> > Make the clock frequency match what the sdm845 downstream kernel
> > uses. Otherwise the panel stays black.
> > 
> > Fixes: 783334f366b18 ("drm/panel: visionox-rm69299: support the variant found in the SHIFT6mq")
> > Signed-off-by: Guido Günther <agx@sigxcpu.org>
> > Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
> > ---
> >  drivers/gpu/drm/panel/panel-visionox-rm69299.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> > index 909c280eab1fb408a713d84051a1afbb252c45e8..e65697ce6f51c7d64b786da18cf44b16de5d6919 100644
> > --- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> > +++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
> > @@ -247,7 +247,7 @@ static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
> >  };
> >  
> >  static const struct drm_display_mode visionox_rm69299_1080x2160_60hz = {
> > -	.clock = 158695,
> > +	.clock = 149360,
> 
> clock = (2160 + 8 + 4 + 4) * (1080 + 26 + 2 + 36) * 60 / 1000 ?

IIRC I was asked to use the resulting clock rather then the clock
formula in another driver a while back but I like that variant better
too, will change in v3.

Thanks,
 -- Guido

> 
> >  	.hdisplay = 1080,
> >  	.hsync_start = 1080 + 26,
> >  	.hsync_end = 1080 + 26 + 2,
> > 
> > -- 
> > 2.51.0
> > 
> 
> -- 
> With best wishes
> Dmitry
>