drm/fb-helper: Remove preferred_bpp parameter from fbdev internals

Store the console's preferred BPP value in struct drm_fb_helper
and remove the respective function parameters from the internal
fbdev code.

The BPP value is only required as a fallback and will now always
be available in the fb-helper instance.

No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125200415.14123-6-tzimmermann@suse.de

drivers/gpu/drm/drm_fb_helper.c

@@ -1784,7 +1784,7 @@ static uint32_t drm_fb_helper_find_color_mode_format(struct drm_fb_helper *fb_he
 	return drm_fb_helper_find_format(fb_helper, formats, format_count, bpp, depth);
 }
 
-static int __drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int preferred_bpp,
+static int __drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper,
 				      struct drm_fb_helper_surface_size *sizes)
 {
 	struct drm_client_dev *client = &fb_helper->client;
@@ -1829,7 +1829,7 @@ static int __drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int prefe
 		surface_format = drm_fb_helper_find_color_mode_format(fb_helper,
 								      plane->format_types,
 								      plane->format_count,
-								      preferred_bpp);
+								      fb_helper->preferred_bpp);
 		if (surface_format != DRM_FORMAT_INVALID)
 			break; /* found supported format */
 	}
@@ -1901,7 +1901,7 @@ static int __drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int prefe
 	return 0;
 }
 
-static int drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int preferred_bpp,
+static int drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper,
 				    struct drm_fb_helper_surface_size *sizes)
 {
 	struct drm_client_dev *client = &fb_helper->client;
@@ -1910,7 +1910,7 @@ static int drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int preferr
 	int ret;
 
 	mutex_lock(&client->modeset_mutex);
-	ret = __drm_fb_helper_find_sizes(fb_helper, preferred_bpp, sizes);
+	ret = __drm_fb_helper_find_sizes(fb_helper, sizes);
 	mutex_unlock(&client->modeset_mutex);
 
 	if (ret)
@@ -1932,14 +1932,13 @@ static int drm_fb_helper_find_sizes(struct drm_fb_helper *fb_helper, int preferr
  * Allocates the backing storage and sets up the fbdev info structure through
  * the ->fb_probe callback.
  */
-static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
-					 int preferred_bpp)
+static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper)
 {
 	struct drm_client_dev *client = &fb_helper->client;
 	struct drm_fb_helper_surface_size sizes;
 	int ret;
 
-	ret = drm_fb_helper_find_sizes(fb_helper, preferred_bpp, &sizes);
+	ret = drm_fb_helper_find_sizes(fb_helper, &sizes);
 	if (ret) {
 		/* First time: disable all crtc's.. */
 		if (!fb_helper->deferred_setup)
@@ -2117,8 +2116,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
 
 /* Note: Drops fb_helper->lock before returning. */
 static int
-__drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper,
-					  int bpp_sel)
+__drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper)
 {
 	struct drm_device *dev = fb_helper->dev;
 	struct fb_info *info;
@@ -2129,10 +2127,9 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper,
 	height = dev->mode_config.max_height;
 
 	drm_client_modeset_probe(&fb_helper->client, width, height);
-	ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
+	ret = drm_fb_helper_single_fb_probe(fb_helper);
 	if (ret < 0) {
 		if (ret == -EAGAIN) {
-			fb_helper->preferred_bpp = bpp_sel;
 			fb_helper->deferred_setup = true;
 			ret = 0;
 		}
@@ -2223,8 +2220,10 @@ int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
 	if (!drm_fbdev_emulation)
 		return 0;
 
+	fb_helper->preferred_bpp = bpp_sel;
+
 	mutex_lock(&fb_helper->lock);
-	ret = __drm_fb_helper_initial_config_and_unlock(fb_helper, bpp_sel);
+	ret = __drm_fb_helper_initial_config_and_unlock(fb_helper);
 
 	return ret;
 }
@@ -2260,8 +2259,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
 
 	mutex_lock(&fb_helper->lock);
 	if (fb_helper->deferred_setup) {
-		err = __drm_fb_helper_initial_config_and_unlock(fb_helper,
-				fb_helper->preferred_bpp);
+		err = __drm_fb_helper_initial_config_and_unlock(fb_helper);
 		return err;
 	}