drm/gma500: 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.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250701090722.13645-13-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/gma500/fbdev.c

@@ -203,7 +203,10 @@ int psb_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
 		return PTR_ERR(backing);
 	obj = &backing->base;
 
-	fb = psb_framebuffer_create(dev, &mode_cmd, obj);
+	fb = psb_framebuffer_create(dev,
+				    drm_get_format_info(dev, mode_cmd.pixel_format,
+							mode_cmd.modifier[0]),
+				    &mode_cmd, obj);
 	if (IS_ERR(fb)) {
 		ret = PTR_ERR(fb);
 		goto err_drm_gem_object_put;

drivers/gpu/drm/gma500/framebuffer.c

@@ -29,25 +29,23 @@ static const struct drm_framebuffer_funcs psb_fb_funcs = {
  */
 static int psb_framebuffer_init(struct drm_device *dev,
 					struct drm_framebuffer *fb,
+					const struct drm_format_info *info,
 					const struct drm_mode_fb_cmd2 *mode_cmd,
 					struct drm_gem_object *obj)
 {
-	const struct drm_format_info *info;
 	int ret;
 
 	/*
 	 * Reject unknown formats, YUV formats, and formats with more than
 	 * 4 bytes per pixel.
 	 */
-	info = drm_get_format_info(dev, mode_cmd->pixel_format,
-				   mode_cmd->modifier[0]);
-	if (!info || !info->depth || info->cpp[0] > 4)
+	if (!info->depth || info->cpp[0] > 4)
 		return -EINVAL;
 
 	if (mode_cmd->pitches[0] & 63)
 		return -EINVAL;
 
-	drm_helper_mode_fill_fb_struct(dev, fb, NULL, mode_cmd);
+	drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd);
 	fb->obj[0] = obj;
 	ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
 	if (ret) {
@@ -60,6 +58,7 @@ static int psb_framebuffer_init(struct drm_device *dev,
 /**
  *	psb_framebuffer_create	-	create a framebuffer backed by gt
  *	@dev: our DRM device
+ *	@info: pixel format information
  *	@mode_cmd: the description of the requested mode
  *	@obj: the backing object
  *
@@ -69,6 +68,7 @@ static int psb_framebuffer_init(struct drm_device *dev,
  *	TODO: review object references
  */
 struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
+					       const struct drm_format_info *info,
 					       const struct drm_mode_fb_cmd2 *mode_cmd,
 					       struct drm_gem_object *obj)
 {
@@ -79,7 +79,7 @@ struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
 	if (!fb)
 		return ERR_PTR(-ENOMEM);
 
-	ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
+	ret = psb_framebuffer_init(dev, fb, info, mode_cmd, obj);
 	if (ret) {
 		kfree(fb);
 		return ERR_PTR(ret);
@@ -112,7 +112,7 @@ static struct drm_framebuffer *psb_user_framebuffer_create
 		return ERR_PTR(-ENOENT);
 
 	/* Let the core code do all the work */
-	fb = psb_framebuffer_create(dev, cmd, obj);
+	fb = psb_framebuffer_create(dev, info, cmd, obj);
 	if (IS_ERR(fb))
 		drm_gem_object_put(obj);
 

drivers/gpu/drm/gma500/psb_drv.h

@@ -594,6 +594,7 @@ extern void psb_modeset_cleanup(struct drm_device *dev);
 
 /* framebuffer */
 struct drm_framebuffer *psb_framebuffer_create(struct drm_device *dev,
+					       const struct drm_format_info *info,
 					       const struct drm_mode_fb_cmd2 *mode_cmd,
 					       struct drm_gem_object *obj);