drm/tegra/dp.c

174 	int err;
178 	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, dpcd, sizeof(dpcd));
179 	if (err < 0)
180 		return err;
194 		err = drm_dp_dpcd_readb(aux, DP_EDP_DPCD_REV, &value);
195 		if (err < 0)
196 			return err;
241 		err = drm_dp_dpcd_read(aux, DP_SUPPORTED_LINK_RATES,
244 		if (err < 0)
245 			return err;
268 	int err;
274 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
275 	if (err < 0)
276 		return err;
281 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
282 	if (err < 0)
283 		return err;
305 	int err;
311 	err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
312 	if (err < 0)
313 		return err;
318 	err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
319 	if (err < 0)
320 		return err;
335 	int err;
338 		err = link->ops->configure(link);
339 		if (err < 0) {
340 			DRM_ERROR("failed to configure DP link: %d\n", err);
341 			return err;
351 	err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));
352 	if (err < 0)
353 		return err;
360 	err = drm_dp_dpcd_writeb(aux, DP_MAIN_LINK_CHANNEL_CODING_SET, value);
361 	if (err < 0)
362 		return err;
365 		err = drm_dp_dpcd_writeb(aux, DP_EDP_CONFIGURATION_SET,
367 		if (err < 0)
368 			return err;
472 	int err;
474 	err = link->ops->apply_training(link);
475 	if (err < 0) {
476 		DRM_ERROR("failed to apply link training: %d\n", err);
477 		return err;
489 	err = drm_dp_dpcd_write(aux, DP_TRAINING_LANE0_SET, values, lanes);
490 	if (err < 0) {
491 		DRM_ERROR("failed to set training parameters: %d\n", err);
492 		return err;
502 		err = drm_dp_dpcd_write(aux, DP_TRAINING_LANE0_1_SET2, values,
504 		if (err < 0) {
505 			DRM_ERROR("failed to set post-cursor: %d\n", err);
506 			return err;
516 	err = drm_dp_dpcd_writeb(aux, DP_TRAINING_PATTERN_SET, pattern);
517 	if (err < 0) {
518 		DRM_ERROR("failed to set training pattern: %d\n", err);
519 		return err;
553 	int err;
555 	err = drm_dp_dpcd_read(link->aux, DP_ADJUST_REQUEST_POST_CURSOR2,
557 	if (err < 0) {
558 		DRM_ERROR("failed to read post_cursor2: %d\n", err);
598 	int err;
600 	err = drm_dp_link_apply_training(link);
601 	if (err < 0)
602 		return err;
606 	err = drm_dp_dpcd_read_link_status(link->aux, status);
607 	if (err < 0) {
608 		DRM_ERROR("failed to read link status: %d\n", err);
609 		return err;
623 	int err;
629 		err = drm_dp_link_recover_clock(link);
630 		if (err < 0) {
631 			DRM_ERROR("failed to recover clock: %d\n", err);
632 			return err;
648 	int err;
650 	err = drm_dp_link_apply_training(link);
651 	if (err < 0)
652 		return err;
656 	err = drm_dp_dpcd_read_link_status(aux, status);
657 	if (err < 0) {
658 		DRM_ERROR("failed to read link status: %d\n", err);
659 		return err;
679 	int err;
688 		err = drm_dp_link_equalize_channel(link);
689 		if (err < 0) {
690 			DRM_ERROR("failed to equalize channel: %d\n", err);
691 			return err;
723 	int err;
727 	err = drm_dp_link_apply_training(link);
728 	if (err < 0)
729 		DRM_ERROR("failed to disable link training: %d\n", err);
734 	int err;
741 	err = drm_dp_link_configure(link->aux, link);
742 	if (err < 0) {
743 		DRM_ERROR("failed to configure DP link: %d\n", err);
744 		return err;
747 	err = drm_dp_link_clock_recovery(link);
748 	if (err < 0) {
749 		DRM_ERROR("clock recovery failed: %d\n", err);
756 		err = drm_dp_link_downgrade(link);
757 		if (err < 0)
765 	err = drm_dp_link_channel_equalization(link);
766 	if (err < 0) {
767 		DRM_ERROR("channel equalization failed: %d\n", err);
774 		err = drm_dp_link_downgrade(link);
775 		if (err < 0)
785 	return err;
791 	int err;
797 	err = drm_dp_link_configure(link->aux, link);
798 	if (err < 0) {
799 		DRM_ERROR("failed to configure DP link: %d\n", err);
800 		return err;
806 	err = drm_dp_link_apply_training(link);
807 	if (err < 0)
818 	err = drm_dp_link_apply_training(link);
819 	if (err < 0)
824 	err = drm_dp_dpcd_read_link_status(link->aux, status);
825 	if (err < 0) {
826 		DRM_ERROR("failed to read link status: %d\n", err);
832 		err = -EIO;
837 		err = -EIO;
842 	return err;
861 	int err;
867 			err = drm_dp_link_train_fast(link);
868 			if (err < 0)
870 					  err);
880 	err = drm_dp_link_train_full(link);
881 	if (err < 0)
882 		DRM_ERROR("full link training failed: %d\n", err);
884 	return err;