On Sat, Jan 9, 2021 at 9:11 PM Bas Nieuwenhuizen
<bas@xxxxxxxxxxxxxxxxxxx> 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.
>
> Signed-off-by: Bas Nieuwenhuizen <bas@xxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Reviewed-by: Zhan Liu <zhan.liu@xxxxxxx>
> Acked-by: Christian König <christian.koenig@xxxxxxx>
> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> Fixes: 816853f9dc40 ("drm/amd/display: Set new format info for converted metadata.")
Do you have commit rights to drm-misc or do you need someone to commit
this for you?
Thanks!
Alex
> ---
> drivers/gpu/drm/drm_plane.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index e6231947f987..a0cb746bcb0a 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -1163,7 +1163,14 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
> if (ret)
> goto out;
>
> - if (old_fb->format != fb->format) {
> + /*
> + * Only check the FOURCC format code, excluding modifiers. This is
> + * enough for all legacy drivers. Atomic drivers have their own
> + * checks in their ->atomic_check implementation, which will
> + * return -EINVAL if any hw or driver constraint is violated due
> + * to modifier changes.
> + */
> + 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;
> --
> 2.29.2
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
