On Fri, Sep 26, 2025 at 12:05:38PM +0300, Jani Nikula wrote:
> We should try to get rid of checks that depend on struct
> drm_i915_private (or struct xe_device) in display
> code. HAS_128_BYTE_Y_TILING() is one of them. In the interest of
> simplicity, just duplicate the check as HAS_128B_Y_TILING() in display.
> 
> Signed-off-by: Jani Nikula <[email protected]>
> ---
>  drivers/gpu/drm/i915/display/intel_display_device.h | 1 +
>  drivers/gpu/drm/i915/display/intel_fb.c             | 3 +--
>  drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h   | 1 -
>  3 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h 
> b/drivers/gpu/drm/i915/display/intel_display_device.h
> index 0e062753cf9b..3e8d4fc862ff 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_device.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_device.h
> @@ -142,6 +142,7 @@ struct intel_display_platforms {
>       func(overlay_needs_physical); \
>       func(supports_tv);
>  
> +#define HAS_128B_Y_TILING(__display) (DISPLAY_VER(__display) != 2 && 
> !(__display)->platform.i915g && !(__display)->platform.i915gm)

This whole thing will be lot simpler if we invert this into
HAS_512B_Y_TILING(), which I actually already did but no one
felt like reviewing it:
https://patchwork.freedesktop.org/patch/343580/?series=70396&rev=1

>  #define HAS_4TILE(__display)         ((__display)->platform.dg2 || 
> DISPLAY_VER(__display) >= 14)
>  #define HAS_ASYNC_FLIPS(__display)   (DISPLAY_VER(__display) >= 5)
>  #define HAS_AS_SDP(__display)                (DISPLAY_VER(__display) >= 13)
> diff --git a/drivers/gpu/drm/i915/display/intel_fb.c 
> b/drivers/gpu/drm/i915/display/intel_fb.c
> index 69237dabdae8..f2ccc9b1175d 100644
> --- a/drivers/gpu/drm/i915/display/intel_fb.c
> +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> @@ -777,7 +777,6 @@ unsigned int
>  intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
>  {
>       struct intel_display *display = to_intel_display(fb->dev);
> -     struct drm_i915_private *i915 = to_i915(display->drm);
>       unsigned int cpp = fb->format->cpp[color_plane];
>  
>       switch (fb->modifier) {
> @@ -814,7 +813,7 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, 
> int color_plane)
>                       return 64;
>               fallthrough;
>       case I915_FORMAT_MOD_Y_TILED:
> -             if (DISPLAY_VER(display) == 2 || HAS_128_BYTE_Y_TILING(i915))
> +             if (DISPLAY_VER(display) == 2 || HAS_128B_Y_TILING(display))
>                       return 128;
>               else
>                       return 512;
> diff --git a/drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h 
> b/drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h
> index b8269391bc69..be3edf20de22 100644
> --- a/drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h
> +++ b/drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h
> @@ -36,6 +36,5 @@ static inline struct drm_i915_private *to_i915(const struct 
> drm_device *dev)
>  #define IS_MOBILE(xe) (xe && 0)
>  
>  #define HAS_FLAT_CCS(xe) (xe_device_has_flat_ccs(xe))
> -#define HAS_128_BYTE_Y_TILING(xe) (xe || 1)
>  
>  #endif
> -- 
> 2.47.3

-- 
Ville Syrjälä
Intel

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