drm/armada: 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: Russell King <linux@armlinux.org.uk>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250701090722.13645-11-ville.syrjala@linux.intel.com

Author: vsyrjala

drivers/gpu/drm/armada/armada_fb.c

@@ -18,7 +18,9 @@ static const struct drm_framebuffer_funcs armada_fb_funcs = {
 };
 
 struct armada_framebuffer *armada_framebuffer_create(struct drm_device *dev,
-	const struct drm_mode_fb_cmd2 *mode, struct armada_gem_object *obj)
+						     const struct drm_format_info *info,
+						     const struct drm_mode_fb_cmd2 *mode,
+						     struct armada_gem_object *obj)
 {
 	struct armada_framebuffer *dfb;
 	uint8_t format, config;
@@ -64,7 +66,7 @@ struct armada_framebuffer *armada_framebuffer_create(struct drm_device *dev,
 	dfb->mod = config;
 	dfb->fb.obj[0] = &obj->obj;
 
-	drm_helper_mode_fill_fb_struct(dev, &dfb->fb, NULL, mode);
+	drm_helper_mode_fill_fb_struct(dev, &dfb->fb, info, mode);
 
 	ret = drm_framebuffer_init(dev, &dfb->fb, &armada_fb_funcs);
 	if (ret) {
@@ -122,7 +124,7 @@ struct drm_framebuffer *armada_fb_create(struct drm_device *dev,
 		goto err_unref;
 	}
 
-	dfb = armada_framebuffer_create(dev, mode, obj);
+	dfb = armada_framebuffer_create(dev, info, mode, obj);
 	if (IS_ERR(dfb)) {
 		ret = PTR_ERR(dfb);
 		goto err;

drivers/gpu/drm/armada/armada_fb.h

@@ -17,6 +17,7 @@ struct armada_framebuffer {
 #define drm_fb_obj(fb) drm_to_armada_gem((fb)->obj[0])
 
 struct armada_framebuffer *armada_framebuffer_create(struct drm_device *,
+	const struct drm_format_info *info,
 	const struct drm_mode_fb_cmd2 *, struct armada_gem_object *);
 struct drm_framebuffer *armada_fb_create(struct drm_device *dev,
 	struct drm_file *dfile, const struct drm_format_info *info,

drivers/gpu/drm/armada/armada_fbdev.c

@@ -78,7 +78,10 @@ int armada_fbdev_driver_fbdev_probe(struct drm_fb_helper *fbh,
 		return -ENOMEM;
 	}
 
-	dfb = armada_framebuffer_create(dev, &mode, obj);
+	dfb = armada_framebuffer_create(dev,
+					drm_get_format_info(dev, mode.pixel_format,
+							    mode.modifier[0]),
+					&mode, obj);
 
 	/*
 	 * A reference is now held by the framebuffer object if