172 static int drm_dp_dpcd_access(struct drm_dp_aux *aux, u8 request,  in drm_dp_dpcd_access()  argument
195 		ret = aux->transfer(aux, &msg);  in drm_dp_dpcd_access()
218 	       aux->name, err);  in drm_dp_dpcd_access()
225 ssize_t drm_dp_dpcd_read(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_read()  argument
230 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, DP_DPCD_REV,  in drm_dp_dpcd_read()
235 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_READ, offset,  in drm_dp_dpcd_read()
242 ssize_t drm_dp_dpcd_write(struct drm_dp_aux *aux, unsigned int offset,  in drm_dp_dpcd_write()  argument
247 	ret = drm_dp_dpcd_access(aux, DP_AUX_NATIVE_WRITE, offset,  in drm_dp_dpcd_write()
253 int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,  in drm_dp_dpcd_read_link_status()  argument
256 	return drm_dp_dpcd_read(aux, DP_LANE0_1_STATUS, status,  in drm_dp_dpcd_read_link_status()
260 static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,  in drm_dp_read_extended_dpcd_caps()  argument
277 	ret = drm_dp_dpcd_read(aux, DP_DP13_DPCD_REV, &dpcd_ext,  in drm_dp_read_extended_dpcd_caps()
286 		       aux->name, dpcd[DP_DPCD_REV], dpcd_ext[DP_DPCD_REV]);  in drm_dp_read_extended_dpcd_caps()
294 	       aux->name, DP_RECEIVER_CAP_SIZE, dpcd);  in drm_dp_read_extended_dpcd_caps()
301 int drm_dp_read_dpcd_caps(struct drm_dp_aux *aux,  in drm_dp_read_dpcd_caps()  argument
306 	ret = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, DP_RECEIVER_CAP_SIZE);  in drm_dp_read_dpcd_caps()
312 	ret = drm_dp_read_extended_dpcd_caps(aux, dpcd);  in drm_dp_read_dpcd_caps()
317 	       aux->name, DP_RECEIVER_CAP_SIZE, dpcd);  in drm_dp_read_dpcd_caps()
335 static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)  in drm_dp_i2c_do_msg()  argument
350 		ret = aux->transfer(aux, msg);  in drm_dp_i2c_do_msg()
363 				       aux->name);  in drm_dp_i2c_do_msg()
366 				       aux->name, ret);  in drm_dp_i2c_do_msg()
380 			       aux->name, ret, msg->size);  in drm_dp_i2c_do_msg()
384 			printf("%s: native defer\n", aux->name);  in drm_dp_i2c_do_msg()
399 			       aux->name, msg->reply);  in drm_dp_i2c_do_msg()
415 			       aux->name, ret, msg->size);  in drm_dp_i2c_do_msg()
416 			aux->i2c_nack_count++;  in drm_dp_i2c_do_msg()
420 			printf("%s: I2C defer\n", aux->name);  in drm_dp_i2c_do_msg()
425 			aux->i2c_defer_count++;  in drm_dp_i2c_do_msg()
435 			       aux->name, msg->reply);  in drm_dp_i2c_do_msg()
440 	printf("%s: Too many retries, giving up\n", aux->name);  in drm_dp_i2c_do_msg()
458 static int drm_dp_i2c_drain_msg(struct drm_dp_aux *aux,  in drm_dp_i2c_drain_msg()  argument
465 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_drain_msg()
471 			       aux->name, msg.size, err);  in drm_dp_i2c_drain_msg()
485 	struct drm_dp_aux *aux = container_of(adapter, struct drm_dp_aux, ddc);  in drm_dp_i2c_xfer()  local
502 		err = drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()
521 			err = drm_dp_i2c_drain_msg(aux, &msg);  in drm_dp_i2c_xfer()
545 	(void)drm_dp_i2c_do_msg(aux, &msg);  in drm_dp_i2c_xfer()