drm/i915: Pass along the format info from .fb_create() to drm_helper_mode_fill_fb_struct()

Plumb the format info from .fb_create() all the way to
drm_helper_mode_fill_fb_struct() to avoid the redundant
lookup.

For the fbdev case a manual drm_get_format_info() lookup
is needed.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250701090722.13645-14-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/i915/display/intel_fb.c

@@ -2207,6 +2207,7 @@ static const struct drm_framebuffer_funcs intel_fb_funcs = {
 
 int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 			   struct drm_gem_object *obj,
+			   const struct drm_format_info *info,
 			   struct drm_mode_fb_cmd2 *mode_cmd)
 {
 	struct intel_display *display = to_intel_display(obj->dev);
@@ -2254,7 +2255,7 @@ int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 		goto err_frontbuffer_put;
 	}
 
-	drm_helper_mode_fill_fb_struct(display->drm, fb, NULL, mode_cmd);
+	drm_helper_mode_fill_fb_struct(display->drm, fb, info, mode_cmd);
 
 	for (i = 0; i < fb->format->num_planes; i++) {
 		unsigned int stride_alignment;
@@ -2335,14 +2336,15 @@ intel_user_framebuffer_create(struct drm_device *dev,
 	if (IS_ERR(obj))
 		return ERR_CAST(obj);
 
-	fb = intel_framebuffer_create(obj, &mode_cmd);
+	fb = intel_framebuffer_create(obj, info, &mode_cmd);
 	drm_gem_object_put(obj);
 
 	return fb;
 }
 
 struct drm_framebuffer *
 intel_framebuffer_create(struct drm_gem_object *obj,
+			 const struct drm_format_info *info,
 			 struct drm_mode_fb_cmd2 *mode_cmd)
 {
 	struct intel_framebuffer *intel_fb;
@@ -2352,7 +2354,7 @@ intel_framebuffer_create(struct drm_gem_object *obj,
 	if (!intel_fb)
 		return ERR_PTR(-ENOMEM);
 
-	ret = intel_framebuffer_init(intel_fb, obj, mode_cmd);
+	ret = intel_framebuffer_init(intel_fb, obj, info, mode_cmd);
 	if (ret)
 		goto err;
 

drivers/gpu/drm/i915/display/intel_fb.h

@@ -102,9 +102,11 @@ void intel_add_fb_offsets(int *x, int *y,
 
 int intel_framebuffer_init(struct intel_framebuffer *ifb,
 			   struct drm_gem_object *obj,
+			   const struct drm_format_info *info,
 			   struct drm_mode_fb_cmd2 *mode_cmd);
 struct drm_framebuffer *
 intel_framebuffer_create(struct drm_gem_object *obj,
+			 const struct drm_format_info *info,
 			 struct drm_mode_fb_cmd2 *mode_cmd);
 struct drm_framebuffer *
 intel_user_framebuffer_create(struct drm_device *dev,

drivers/gpu/drm/i915/display/intel_fbdev_fb.c

@@ -62,7 +62,11 @@ struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
 		return ERR_PTR(-ENOMEM);
 	}
 
-	fb = intel_framebuffer_create(intel_bo_to_drm_bo(obj), &mode_cmd);
+	fb = intel_framebuffer_create(intel_bo_to_drm_bo(obj),
+				      drm_get_format_info(display->drm,
+							  mode_cmd.pixel_format,
+							  mode_cmd.modifier[0]),
+				      &mode_cmd);
 	i915_gem_object_put(obj);
 
 	return to_intel_framebuffer(fb);

drivers/gpu/drm/i915/display/intel_plane_initial.c

@@ -289,7 +289,8 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 	mode_cmd.flags = DRM_MODE_FB_MODIFIERS;
 
 	if (intel_framebuffer_init(to_intel_framebuffer(fb),
-				   intel_bo_to_drm_bo(vma->obj), &mode_cmd)) {
+				   intel_bo_to_drm_bo(vma->obj),
+				   fb->format, &mode_cmd)) {
 		drm_dbg_kms(display->drm, "intel fb init failed\n");
 		goto err_vma;
 	}

drivers/gpu/drm/xe/display/intel_fbdev_fb.c

@@ -66,7 +66,11 @@ struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
 		goto err;
 	}
 
-	fb = intel_framebuffer_create(&obj->ttm.base, &mode_cmd);
+	fb = intel_framebuffer_create(&obj->ttm.base,
+				      drm_get_format_info(dev,
+							  mode_cmd.pixel_format,
+							  mode_cmd.modifier[0]),
+				      &mode_cmd);
 	if (IS_ERR(fb)) {
 		xe_bo_unpin_map_no_vm(obj);
 		goto err;

drivers/gpu/drm/xe/display/xe_plane_initial.c

@@ -184,7 +184,7 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 		return false;
 
 	if (intel_framebuffer_init(to_intel_framebuffer(fb),
-				   &bo->ttm.base, &mode_cmd)) {
+				   &bo->ttm.base, fb->format, &mode_cmd)) {
 		drm_dbg_kms(&xe->drm, "intel fb init failed\n");
 		goto err_bo;
 	}