drm/atomic-helper: rename drm_atomic_helper_check_wb_encoder_state

The drm_atomic_helper_check_wb_encoder_state() function doesn't use
encoder for anything other than getting the drm_device instance. The
function's description talks about checking the writeback connector
state, not the encoder state. Moreover, there is no such thing as an
encoder state, encoders generally do not have a state on their own.

Rename the function to drm_atomic_helper_check_wb_connector_state()
and change arguments to drm_writeback_connector and drm_atomic_state.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231208010314.3395904-2-dmitry.baryshkov@linaro.org

drivers/gpu/drm/drm_atomic_helper.c

@@ -795,9 +795,9 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
 
 /**
- * drm_atomic_helper_check_wb_encoder_state() - Check writeback encoder state
- * @encoder: encoder state to check
- * @conn_state: connector state to check
+ * drm_atomic_helper_check_wb_connector_state() - Check writeback connector state
+ * @connector: corresponding connector
+ * @state: the driver state object
  *
  * Checks if the writeback connector state is valid, and returns an error if it
  * isn't.
@@ -806,9 +806,11 @@ EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
  * Zero for success or -errno
  */
 int
-drm_atomic_helper_check_wb_encoder_state(struct drm_encoder *encoder,
-					 struct drm_connector_state *conn_state)
+drm_atomic_helper_check_wb_connector_state(struct drm_connector *connector,
+					   struct drm_atomic_state *state)
 {
+	struct drm_connector_state *conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
 	struct drm_writeback_job *wb_job = conn_state->writeback_job;
 	struct drm_property_blob *pixel_format_blob;
 	struct drm_framebuffer *fb;
@@ -827,11 +829,11 @@ drm_atomic_helper_check_wb_encoder_state(struct drm_encoder *encoder,
 		if (fb->format->format == formats[i])
 			return 0;
 
-	drm_dbg_kms(encoder->dev, "Invalid pixel format %p4cc\n", &fb->format->format);
+	drm_dbg_kms(connector->dev, "Invalid pixel format %p4cc\n", &fb->format->format);
 
 	return -EINVAL;
 }
-EXPORT_SYMBOL(drm_atomic_helper_check_wb_encoder_state);
+EXPORT_SYMBOL(drm_atomic_helper_check_wb_connector_state);
 
 /**
  * drm_atomic_helper_check_plane_state() - Check plane state for validity

drivers/gpu/drm/vkms/vkms_writeback.c

@@ -34,6 +34,7 @@ static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
 					struct drm_crtc_state *crtc_state,
 					struct drm_connector_state *conn_state)
 {
+	struct drm_connector *connector = conn_state->connector;
 	struct drm_framebuffer *fb;
 	const struct drm_display_mode *mode = &crtc_state->mode;
 	int ret;
@@ -48,7 +49,7 @@ static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
 		return -EINVAL;
 	}
 
-	ret = drm_atomic_helper_check_wb_encoder_state(encoder, conn_state);
+	ret = drm_atomic_helper_check_wb_connector_state(connector, conn_state->state);
 	if (ret < 0)
 		return ret;
 

include/drm/drm_atomic_helper.h

@@ -49,9 +49,8 @@ struct drm_private_state;
 
 int drm_atomic_helper_check_modeset(struct drm_device *dev,
 				struct drm_atomic_state *state);
-int
-drm_atomic_helper_check_wb_encoder_state(struct drm_encoder *encoder,
-					 struct drm_connector_state *conn_state);
+int drm_atomic_helper_check_wb_connector_state(struct drm_connector *connector,
+					       struct drm_atomic_state *state);
 int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
 					const struct drm_crtc_state *crtc_state,
 					int min_scale,