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Message-ID: <938ca191-074b-468c-d44d-0be795fb0700@amd.com>
Date:   Thu, 4 Aug 2022 09:27:27 -0400
From:   Harry Wentland <harry.wentland@....com>
To:     Dave Airlie <airlied@...hat.com>, torvalds@...ux-foundation.org
Cc:     Rodrigo.Siqueira@....com, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/amd/display: restore plane with no modifiers code.

On 2022-08-04 01:50, Dave Airlie wrote:
> When this file was split in
> 
> 5d945cbcd4b16a29d6470a80dfb19738f9a4319f
> Author: Rodrigo Siqueira <Rodrigo.Siqueira@....com>
> Date:   Wed Jul 20 15:31:42 2022 -0400
> 
> drm/amd/display: Create a file dedicated to planes
> 
> This chunk seemed to get dropped. Linus noticed on this
> rx580 and I've reproduced on FIJI which makes sense as these
> are pre-modifier GPUs.
> 
> With this applied, I get gdm back.
> 
> Fixes: 5d945cbcd4b1 ("drm/amd/display: Create a file dedicated to planes")
> Signed-off-by: Dave Airlie <airlied@...hat.com>

Reviewed-by: Harry Wentland <harry.wentland@....com>

Harry

> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> index 8cd25b2ea0dc..b841b8b0a9d8 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> @@ -1591,6 +1591,9 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
>  	if (res)
>  		return res;
>  
> +	if (modifiers == NULL)
> +		adev_to_drm(dm->adev)->mode_config.fb_modifiers_not_supported = true;
> +
>  	res = drm_universal_plane_init(adev_to_drm(dm->adev), plane, possible_crtcs,
>  				       &dm_plane_funcs, formats, num_formats,
>  				       modifiers, plane->type, NULL);

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