Am 07.12.20 um 16:57 schrieb Maxime Ripard:
> Reported-by: Thomas Zimmermann <tzimmermann@suse.de>
> Fixes: 63495f6b4aed ("drm/vc4: hdmi: Make sure our clock rate is within limits")
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/vc4/vc4_hdmi.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index 5a608ed1d75e..a88aa20beeb6 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -796,6 +796,9 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
>   		pixel_rate = mode->clock * 1000;
>   	}
>   
> +	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
> +		pixel_rate = pixel_rate * 2;
> +
>   	if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
>   		return -EINVAL;
>   
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer