Re: [PATCH] drm: Check actual format for legacy pageflip.

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Hi Bas,

On 02/01/2021 15:02, Bas Nieuwenhuizen wrote:
> With modifiers one can actually have different format_info structs
> for the same format, which now matters for AMDGPU since we convert
> implicit modifiers to explicit modifiers with multiple planes.
> 
> I checked other drivers and it doesn't look like they end up triggering
> this case so I think this is safe to relax.

This patch fixes https://gitlab.freedesktop.org/drm/amd/-/issues/1379:

   Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@xxxxxxx>

Thanks!
P-E

> 
> Signed-off-by: Bas Nieuwenhuizen <bas@xxxxxxxxxxxxxxxxxxx>
> Fixes: 816853f9dc40 ("drm/amd/display: Set new format info for converted metadata.")
> ---
>  drivers/gpu/drm/drm_plane.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index e6231947f987..f5085990cfac 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -1163,7 +1163,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
>  	if (ret)
>  		goto out;
>  
> -	if (old_fb->format != fb->format) {
> +	if (old_fb->format->format != fb->format->format) {
>  		DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
>  		ret = -EINVAL;
>  		goto out;
> 
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