Re: [PATCH 03/12] drm/i915/fb: Reject per-plane remapping with DPT

[Jani Nikula <jani.nikula@linux.intel.com>]

On Tue, 07 Apr 2026, Ville Syrjala <ville.syrjala@linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> We currently create a single DPT for the entire FB, so we can't
> actually do the per-plane remap. Reject it for now.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_fb.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
> index 4b0afea1c456..52a619088e8e 100644
> --- a/drivers/gpu/drm/i915/display/intel_fb.c
> +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> @@ -1252,6 +1252,10 @@ static bool intel_plane_can_remap(const struct intel_plane_state *plane_state)
>  	if (intel_fb_is_ccs_modifier(fb->modifier))
>  		return false;
>  
> +	/* TODO implement remapping with DPT */
> +	if (intel_fb_uses_dpt(fb))
> +		return false;
> +
>  	/* Linear needs a page aligned stride for remapping */
>  	if (fb->modifier == DRM_FORMAT_MOD_LINEAR) {
>  		unsigned int alignment = intel_tile_size(display) - 1;

-- 
Jani Nikula, Intel