[Intel-gfx] [PATCH 2/4] drm/i915/mtl: Add MTL for remapping CCS FBs

[Sripada, Radhakrishna]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Juha-
> Pekka Heikkila
> Sent: Thursday, May 4, 2023 3:28 AM
> To: intel-gfx at lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH 2/4] drm/i915/mtl: Add MTL for remapping CCS FBs
> 
> From: Clint Taylor <clinton.a.taylor at intel.com>
> 
>     Add support for remapping CCS FBs on MTL to remove the restriction
>     of the power-of-two sized stride and the 2MB surface offset alignment
>     for these FBs.
> 
> Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
With Alignment of commit message fixed.
Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_fb.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_fb.c
> b/drivers/gpu/drm/i915/display/intel_fb.c
> index e5f637897b5e..c004f08fcfe1 100644
> --- a/drivers/gpu/drm/i915/display/intel_fb.c
> +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> @@ -1190,7 +1190,8 @@ bool intel_fb_needs_pot_stride_remap(const struct
> intel_framebuffer *fb)
>  {
>  	struct drm_i915_private *i915 = to_i915(fb->base.dev);
> 
> -	return IS_ALDERLAKE_P(i915) && intel_fb_uses_dpt(&fb->base);
> +	return (IS_ALDERLAKE_P(i915) || DISPLAY_VER(i915) >= 14) &&
> +		intel_fb_uses_dpt(&fb->base);
>  }
> 
>  static int intel_fb_pitch(const struct intel_framebuffer *fb, int color_plane,
> unsigned int rotation)
> @@ -1326,9 +1327,10 @@ plane_view_scanout_stride(const struct
> intel_framebuffer *fb, int color_plane,
>  			  unsigned int tile_width,
>  			  unsigned int src_stride_tiles, unsigned int
> dst_stride_tiles)
>  {
> +	struct drm_i915_private *i915 = to_i915(fb->base.dev);
>  	unsigned int stride_tiles;
> 
> -	if (IS_ALDERLAKE_P(to_i915(fb->base.dev)))
> +	if (IS_ALDERLAKE_P(i915) || DISPLAY_VER(i915) >= 14)
>  		stride_tiles = src_stride_tiles;
>  	else
>  		stride_tiles = dst_stride_tiles;
> @@ -1522,7 +1524,8 @@ static void intel_fb_view_init(struct drm_i915_private
> *i915, struct intel_fb_vi
>  	memset(view, 0, sizeof(*view));
>  	view->gtt.type = view_type;
> 
> -	if (view_type == I915_GTT_VIEW_REMAPPED &&
> IS_ALDERLAKE_P(i915))
> +	if (view_type == I915_GTT_VIEW_REMAPPED &&
> +	    (IS_ALDERLAKE_P(i915) || DISPLAY_VER(i915) >= 14))
>  		view->gtt.remapped.plane_alignment = SZ_2M / PAGE_SIZE;
>  }
> 
> --
> 2.25.1