drm: Rename drm_plane_check_pixel_format() to drm_plane_has_format()

Rename drm_plane_check_pixel_format() to drm_plane_has_format()
and change the return type accordingly. Allows one to write
more natural code.

Also matches drm_any_plane_has_format() better.

Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Reviewed-by: Daniel Vetter <[e-mail]>
Acked-by: Thomas Zimmermann <[e-mail]>

drivers/gpu/drm/drm_atomic.c

···
 	unsigned int fb_width, fb_height;
 	struct drm_mode_rect *clips;
 	uint32_t num_clips;
-	int ret;
 
 	/* either *both* CRTC and FB must be set, or neither */
 	if (crtc && !fb) {
···
 	}
 
 	/* Check whether this plane supports the fb pixel format. */
-	ret = drm_plane_check_pixel_format(plane, fb->format->format,
-					   fb->modifier);
-	if (ret) {
+	if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {
 		drm_dbg_atomic(plane->dev,
 			       "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
 			       plane->base.id, plane->name,
 			       &fb->format->format, fb->modifier);
-		return ret;
+		return -EINVAL;
 	}
 
 	/* Give drivers some help against integer overflows */

drivers/gpu/drm/drm_crtc.c

···
 		 * case.
 		 */
 		if (!plane->format_default) {
-			ret = drm_plane_check_pixel_format(plane,
-							   fb->format->format,
-							   fb->modifier);
-			if (ret) {
+			if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {
 				drm_dbg_kms(dev, "Invalid pixel format %p4cc, modifier 0x%llx\n",
 					    &fb->format->format, fb->modifier);
+				ret = -EINVAL;
 				goto out;
 			}
 		}

drivers/gpu/drm/drm_crtc_internal.h

···
 /* drm_plane.c */
 int drm_plane_register_all(struct drm_device *dev);
 void drm_plane_unregister_all(struct drm_device *dev);
-int drm_plane_check_pixel_format(struct drm_plane *plane,
-				 u32 format, u64 modifier);
+bool drm_plane_has_format(struct drm_plane *plane,
+			  u32 format, u64 modifier);
 struct drm_mode_rect *
 __drm_plane_get_damage_clips(const struct drm_plane_state *state);
 

drivers/gpu/drm/drm_plane.c

···
 	return 0;
 }
 
-int drm_plane_check_pixel_format(struct drm_plane *plane,
-				 u32 format, u64 modifier)
+bool drm_plane_has_format(struct drm_plane *plane,
+			  u32 format, u64 modifier)
 {
 	unsigned int i;
 
···
 			break;
 	}
 	if (i == plane->format_count)
-		return -EINVAL;
+		return false;
 
 	if (plane->funcs->format_mod_supported) {
 		if (!plane->funcs->format_mod_supported(plane, format, modifier))
-			return -EINVAL;
+			return false;
 	} else {
 		if (!plane->modifier_count)
-			return 0;
+			return true;
 
 		for (i = 0; i < plane->modifier_count; i++) {
 			if (modifier == plane->modifiers[i])
 				break;
 		}
 		if (i == plane->modifier_count)
-			return -EINVAL;
+			return false;
 	}
 
-	return 0;
+	return true;
 }
 
 static int __setplane_check(struct drm_plane *plane,
···
 	}
 
 	/* Check whether this plane supports the fb pixel format. */
-	ret = drm_plane_check_pixel_format(plane, fb->format->format,
-					   fb->modifier);
-	if (ret) {
+	if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) {
 		DRM_DEBUG_KMS("Invalid pixel format %p4cc, modifier 0x%llx\n",
 			      &fb->format->format, fb->modifier);
-		return ret;
+		return -EINVAL;
 	}
 
 	/* Give drivers some help against integer overflows */
···
 	struct drm_plane *plane;
 
 	drm_for_each_plane(plane, dev) {
-		if (drm_plane_check_pixel_format(plane, format, modifier) == 0)
+		if (drm_plane_has_format(plane, format, modifier))
 			return true;
 	}