[linux-2.6-block.git] / drivers / gpu / drm / i915 / intel_dp_mst.c

/*
 * Copyright © 2008 Intel Corporation
 *             2014 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 */

#include <drm/drmP.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>

static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
					struct intel_crtc_state *pipe_config)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_dp *intel_dp = &intel_dig_port->dp;
	struct drm_atomic_state *state;
	int bpp, i;
	int lane_count, slots;
	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	struct drm_connector *drm_connector;
	struct intel_connector *connector, *found = NULL;
	struct drm_connector_state *connector_state;
	int mst_pbn;

	pipe_config->dp_encoder_is_mst = true;
	pipe_config->has_pch_encoder = false;
	pipe_config->has_dp_encoder = true;
	bpp = 24;
	/*
	 * for MST we always configure max link bw - the spec doesn't
	 * seem to suggest we should do otherwise.
	 */
	lane_count = drm_dp_max_lane_count(intel_dp->dpcd);


	pipe_config->lane_count = lane_count;

	pipe_config->pipe_bpp = 24;
	pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);

	state = pipe_config->base.state;

	for_each_connector_in_state(state, drm_connector, connector_state, i) {
		connector = to_intel_connector(drm_connector);

		if (connector_state->best_encoder == &encoder->base) {
			found = connector;
			break;
		}
	}

	if (!found) {
		DRM_ERROR("can't find connector\n");
		return false;
	}

	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);

	pipe_config->pbn = mst_pbn;
	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);

	intel_link_compute_m_n(bpp, lane_count,
			       adjusted_mode->crtc_clock,
			       pipe_config->port_clock,
			       &pipe_config->dp_m_n);

	pipe_config->dp_m_n.tu = slots;

	return true;

}

static void intel_mst_disable_dp(struct intel_encoder *encoder)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_dp *intel_dp = &intel_dig_port->dp;
	int ret;

	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);

	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);

	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	if (ret) {
		DRM_ERROR("failed to update payload %d\n", ret);
	}
}

static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_dp *intel_dp = &intel_dig_port->dp;

	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);

	/* this can fail */
	drm_dp_check_act_status(&intel_dp->mst_mgr);
	/* and this can also fail */
	drm_dp_update_payload_part2(&intel_dp->mst_mgr);

	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);

	intel_dp->active_mst_links--;

	intel_mst->connector = NULL;
	if (intel_dp->active_mst_links == 0) {
		intel_dig_port->base.post_disable(&intel_dig_port->base);
		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
	}
}

static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_dp *intel_dp = &intel_dig_port->dp;
	struct drm_device *dev = encoder->base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	enum port port = intel_dig_port->port;
	int ret;
	uint32_t temp;
	struct intel_connector *found = NULL, *connector;
	int slots;
	struct drm_crtc *crtc = encoder->base.crtc;
	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	for_each_intel_connector(dev, connector) {
		if (connector->base.state->best_encoder == &encoder->base) {
			found = connector;
			break;
		}
	}

	if (!found) {
		DRM_ERROR("can't find connector\n");
		return;
	}

	/* MST encoders are bound to a crtc, not to a connector,
	 * force the mapping here for get_hw_state.
	 */
	found->encoder = encoder;

	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);

	intel_mst->connector = found;

	if (intel_dp->active_mst_links == 0) {
		intel_prepare_ddi_buffer(&intel_dig_port->base);

		intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);

		intel_dp_set_link_params(intel_dp, intel_crtc->config);

		intel_ddi_init_dp_buf_reg(&intel_dig_port->base);

		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);

		intel_dp_start_link_train(intel_dp);
		intel_dp_stop_link_train(intel_dp);
	}

	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
				       intel_mst->connector->port,
				       intel_crtc->config->pbn, &slots);
	if (ret == false) {
		DRM_ERROR("failed to allocate vcpi\n");
		return;
	}


	intel_dp->active_mst_links++;
	temp = I915_READ(DP_TP_STATUS(port));
	I915_WRITE(DP_TP_STATUS(port), temp);

	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
}

static void intel_mst_enable_dp(struct intel_encoder *encoder)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_dp *intel_dp = &intel_dig_port->dp;
	struct drm_device *dev = intel_dig_port->base.base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	enum port port = intel_dig_port->port;
	int ret;

	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);

	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
		     1))
		DRM_ERROR("Timed out waiting for ACT sent\n");

	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);

	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
}

static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
				      enum pipe *pipe)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	*pipe = intel_mst->pipe;
	if (intel_mst->connector)
		return true;
	return false;
}

static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
					struct intel_crtc_state *pipe_config)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	struct drm_device *dev = encoder->base.dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
	u32 temp, flags = 0;

	pipe_config->has_dp_encoder = true;

	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	if (temp & TRANS_DDI_PHSYNC)
		flags |= DRM_MODE_FLAG_PHSYNC;
	else
		flags |= DRM_MODE_FLAG_NHSYNC;
	if (temp & TRANS_DDI_PVSYNC)
		flags |= DRM_MODE_FLAG_PVSYNC;
	else
		flags |= DRM_MODE_FLAG_NVSYNC;

	switch (temp & TRANS_DDI_BPC_MASK) {
	case TRANS_DDI_BPC_6:
		pipe_config->pipe_bpp = 18;
		break;
	case TRANS_DDI_BPC_8:
		pipe_config->pipe_bpp = 24;
		break;
	case TRANS_DDI_BPC_10:
		pipe_config->pipe_bpp = 30;
		break;
	case TRANS_DDI_BPC_12:
		pipe_config->pipe_bpp = 36;
		break;
	default:
		break;
	}
	pipe_config->base.adjusted_mode.flags |= flags;

	pipe_config->lane_count =
		((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;

	intel_dp_get_m_n(crtc, pipe_config);

	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
}

static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_dp *intel_dp = intel_connector->mst_port;
	struct edid *edid;
	int ret;

	if (!intel_dp) {
		return intel_connector_update_modes(connector, NULL);
	}

	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	ret = intel_connector_update_modes(connector, edid);
	kfree(edid);

	return ret;
}

static enum drm_connector_status
intel_dp_mst_detect(struct drm_connector *connector, bool force)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_dp *intel_dp = intel_connector->mst_port;

	if (!intel_dp)
		return connector_status_disconnected;
	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
}

static int
intel_dp_mst_set_property(struct drm_connector *connector,
			  struct drm_property *property,
			  uint64_t val)
{
	return 0;
}

static void
intel_dp_mst_connector_destroy(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);

	if (!IS_ERR_OR_NULL(intel_connector->edid))
		kfree(intel_connector->edid);

	drm_connector_cleanup(connector);
	kfree(connector);
}

static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.detect = intel_dp_mst_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = intel_dp_mst_set_property,
	.atomic_get_property = intel_connector_atomic_get_property,
	.early_unregister = intel_connector_unregister,
	.destroy = intel_dp_mst_connector_destroy,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
};

static int intel_dp_mst_get_modes(struct drm_connector *connector)
{
	return intel_dp_mst_get_ddc_modes(connector);
}

static enum drm_mode_status
intel_dp_mst_mode_valid(struct drm_connector *connector,
			struct drm_display_mode *mode)
{
	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;

	/* TODO - validate mode against available PBN for link */
	if (mode->clock < 10000)
		return MODE_CLOCK_LOW;

	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
		return MODE_H_ILLEGAL;

	if (mode->clock > max_dotclk)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static struct drm_encoder *intel_mst_atomic_best_encoder(struct drm_connector *connector,
							 struct drm_connector_state *state)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_dp *intel_dp = intel_connector->mst_port;
	struct intel_crtc *crtc = to_intel_crtc(state->crtc);

	if (!intel_dp)
		return NULL;
	return &intel_dp->mst_encoders[crtc->pipe]->base.base;
}

static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_dp *intel_dp = intel_connector->mst_port;
	if (!intel_dp)
		return NULL;
	return &intel_dp->mst_encoders[0]->base.base;
}

static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	.get_modes = intel_dp_mst_get_modes,
	.mode_valid = intel_dp_mst_mode_valid,
	.atomic_best_encoder = intel_mst_atomic_best_encoder,
	.best_encoder = intel_mst_best_encoder,
};

static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
{
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);

	drm_encoder_cleanup(encoder);
	kfree(intel_mst);
}

static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
	.destroy = intel_dp_mst_encoder_destroy,
};

static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
{
	if (connector->encoder && connector->base.state->crtc) {
		enum pipe pipe;
		if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
			return false;
		return true;
	}
	return false;
}

static void intel_connector_add_to_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	if (dev_priv->fbdev)
		drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
						&connector->base);
#endif
}

static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	if (dev_priv->fbdev)
		drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
						   &connector->base);
#endif
}

static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
{
	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	struct drm_device *dev = intel_dig_port->base.base.dev;
	struct intel_connector *intel_connector;
	struct drm_connector *connector;
	int i;

	intel_connector = intel_connector_alloc();
	if (!intel_connector)
		return NULL;

	connector = &intel_connector->base;
	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);

	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	intel_connector->mst_port = intel_dp;
	intel_connector->port = port;

	for (i = PIPE_A; i <= PIPE_C; i++) {
		drm_mode_connector_attach_encoder(&intel_connector->base,
						  &intel_dp->mst_encoders[i]->base.base);
	}
	intel_dp_add_properties(intel_dp, connector);

	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);

	drm_mode_connector_set_path_property(connector, pathprop);
	return connector;
}

static void intel_dp_register_mst_connector(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct drm_device *dev = connector->dev;

	drm_modeset_lock_all(dev);
	intel_connector_add_to_fbdev(intel_connector);
	drm_modeset_unlock_all(dev);

	drm_connector_register(&intel_connector->base);
}

static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
					   struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct drm_device *dev = connector->dev;

	drm_connector_unregister(connector);

	/* need to nuke the connector */
	drm_modeset_lock_all(dev);
	intel_connector_remove_from_fbdev(intel_connector);
	intel_connector->mst_port = NULL;
	drm_modeset_unlock_all(dev);

	drm_connector_unreference(&intel_connector->base);
	DRM_DEBUG_KMS("\n");
}

static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
{
	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	struct drm_device *dev = intel_dig_port->base.base.dev;

	drm_kms_helper_hotplug_event(dev);
}

static const struct drm_dp_mst_topology_cbs mst_cbs = {
	.add_connector = intel_dp_add_mst_connector,
	.register_connector = intel_dp_register_mst_connector,
	.destroy_connector = intel_dp_destroy_mst_connector,
	.hotplug = intel_dp_mst_hotplug,
};

static struct intel_dp_mst_encoder *
intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
{
	struct intel_dp_mst_encoder *intel_mst;
	struct intel_encoder *intel_encoder;
	struct drm_device *dev = intel_dig_port->base.base.dev;

	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);

	if (!intel_mst)
		return NULL;

	intel_mst->pipe = pipe;
	intel_encoder = &intel_mst->base;
	intel_mst->primary = intel_dig_port;

	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
			 DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));

	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	intel_encoder->crtc_mask = 0x7;
	intel_encoder->cloneable = 0;

	intel_encoder->compute_config = intel_dp_mst_compute_config;
	intel_encoder->disable = intel_mst_disable_dp;
	intel_encoder->post_disable = intel_mst_post_disable_dp;
	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	intel_encoder->enable = intel_mst_enable_dp;
	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	intel_encoder->get_config = intel_dp_mst_enc_get_config;

	return intel_mst;

}

static bool
intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
{
	int i;
	struct intel_dp *intel_dp = &intel_dig_port->dp;

	for (i = PIPE_A; i <= PIPE_C; i++)
		intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
	return true;
}

int
intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
{
	struct intel_dp *intel_dp = &intel_dig_port->dp;
	struct drm_device *dev = intel_dig_port->base.base.dev;
	int ret;

	intel_dp->can_mst = true;
	intel_dp->mst_mgr.cbs = &mst_cbs;

	/* create encoders */
	intel_dp_create_fake_mst_encoders(intel_dig_port);
	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
	if (ret) {
		intel_dp->can_mst = false;
		return ret;
	}
	return 0;
}

void
intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
{
	struct intel_dp *intel_dp = &intel_dig_port->dp;

	if (!intel_dp->can_mst)
		return;

	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
	/* encoders will get killed by normal cleanup */
}
Commit	Line	Data
0e32b39c DA	1	/*
	2	* Copyright © 2008 Intel Corporation
	3	* 2014 Red Hat Inc.
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a
	6	* copy of this software and associated documentation files (the "Software"),
	7	* to deal in the Software without restriction, including without limitation
	8	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	9	* and/or sell copies of the Software, and to permit persons to whom the
	10	* Software is furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the next
	13	* paragraph) shall be included in all copies or substantial portions of the
	14	* Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	22	* IN THE SOFTWARE.
	23	*
	24	*/
	25
	26	#include <drm/drmP.h>
	27	#include "i915_drv.h"
	28	#include "intel_drv.h"
c6f95f27	29	#include <drm/drm_atomic_helper.h>
0e32b39c DA	30	#include <drm/drm_crtc_helper.h>
	31	#include <drm/drm_edid.h>
	32
	33	static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
5cec258b	34	struct intel_crtc_state *pipe_config)
0e32b39c DA	35	{
	36	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	37	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	38	struct intel_dp *intel_dp = &intel_dig_port->dp;
e75f4771 ACO	39	struct drm_atomic_state *state;
e75f4771 ACO	40	int bpp, i;
04a60f9f	41	int lane_count, slots;
7c5f93b0	42	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
da3ced29 ACO	43	struct drm_connector *drm_connector;
	44	struct intel_connector connector, found = NULL;
	45	struct drm_connector_state *connector_state;
0e32b39c DA	46	int mst_pbn;
	47
	48	pipe_config->dp_encoder_is_mst = true;
	49	pipe_config->has_pch_encoder = false;
	50	pipe_config->has_dp_encoder = true;
	51	bpp = 24;
	52	/*
	53	* for MST we always configure max link bw - the spec doesn't
	54	* seem to suggest we should do otherwise.
	55	*/
	56	lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
ed4e9c1d	57
ed4e9c1d	58
90a6b7b0	59	pipe_config->lane_count = lane_count;
0e32b39c DA	60
0e32b39c DA	61	pipe_config->pipe_bpp = 24;
04a60f9f	62	pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
0e32b39c	63
e75f4771 ACO	64	state = pipe_config->base.state;
e75f4771 ACO	65
da3ced29 ACO	66	for_each_connector_in_state(state, drm_connector, connector_state, i) {
da3ced29 ACO	67	connector = to_intel_connector(drm_connector);
e75f4771	68
da3ced29 ACO	69	if (connector_state->best_encoder == &encoder->base) {
da3ced29 ACO	70	found = connector;
0e32b39c DA	71	break;
	72	}
	73	}
	74
	75	if (!found) {
	76	DRM_ERROR("can't find connector\n");
	77	return false;
	78	}
	79
aad941d5	80	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
0e32b39c DA	81
	82	pipe_config->pbn = mst_pbn;
	83	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
	84
	85	intel_link_compute_m_n(bpp, lane_count,
	86	adjusted_mode->crtc_clock,
	87	pipe_config->port_clock,
	88	&pipe_config->dp_m_n);
	89
	90	pipe_config->dp_m_n.tu = slots;
6fa2d197	91
0e32b39c DA	92	return true;
	93
	94	}
	95
	96	static void intel_mst_disable_dp(struct intel_encoder *encoder)
	97	{
	98	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	99	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	100	struct intel_dp *intel_dp = &intel_dig_port->dp;
	101	int ret;
	102
	103	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	104
0552f765	105	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->connector->port);
0e32b39c DA	106
	107	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	108	if (ret) {
	109	DRM_ERROR("failed to update payload %d\n", ret);
	110	}
	111	}
	112
	113	static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
	114	{
	115	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	116	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	117	struct intel_dp *intel_dp = &intel_dig_port->dp;
	118
	119	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	120
	121	/* this can fail */
	122	drm_dp_check_act_status(&intel_dp->mst_mgr);
	123	/* and this can also fail */
	124	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	125
0552f765	126	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->connector->port);
0e32b39c DA	127
0e32b39c DA	128	intel_dp->active_mst_links--;
0552f765 DA	129
0552f765 DA	130	intel_mst->connector = NULL;
0e32b39c DA	131	if (intel_dp->active_mst_links == 0) {
	132	intel_dig_port->base.post_disable(&intel_dig_port->base);
	133	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
	134	}
	135	}
	136
	137	static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
	138	{
	139	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	140	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	141	struct intel_dp *intel_dp = &intel_dig_port->dp;
	142	struct drm_device *dev = encoder->base.dev;
	143	struct drm_i915_private *dev_priv = dev->dev_private;
	144	enum port port = intel_dig_port->port;
	145	int ret;
	146	uint32_t temp;
9b4fd8f2	147	struct intel_connector found = NULL, connector;
0e32b39c DA	148	int slots;
	149	struct drm_crtc *crtc = encoder->base.crtc;
	150	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	151
9b4fd8f2 ACO	152	for_each_intel_connector(dev, connector) {
	153	if (connector->base.state->best_encoder == &encoder->base) {
	154	found = connector;
0e32b39c DA	155	break;
	156	}
	157	}
	158
	159	if (!found) {
	160	DRM_ERROR("can't find connector\n");
	161	return;
	162	}
	163
e85376cb ML	164	/* MST encoders are bound to a crtc, not to a connector,
	165	* force the mapping here for get_hw_state.
	166	*/
	167	found->encoder = encoder;
	168
0e32b39c	169	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
0552f765 DA	170
0552f765 DA	171	intel_mst->connector = found;
0e32b39c DA	172
0e32b39c DA	173	if (intel_dp->active_mst_links == 0) {
6a7e4f99 VS	174	intel_prepare_ddi_buffer(&intel_dig_port->base);
6a7e4f99 VS	175
d919161b	176	intel_ddi_clk_select(&intel_dig_port->base, intel_crtc->config);
0e32b39c	177
901c2daf VS	178	intel_dp_set_link_params(intel_dp, intel_crtc->config);
901c2daf VS	179
0e32b39c DA	180	intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
	181
	182	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
	183
0e32b39c	184	intel_dp_start_link_train(intel_dp);
0e32b39c DA	185	intel_dp_stop_link_train(intel_dp);
	186	}
	187
	188	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
0552f765	189	intel_mst->connector->port,
6e3c9717	190	intel_crtc->config->pbn, &slots);
0e32b39c DA	191	if (ret == false) {
	192	DRM_ERROR("failed to allocate vcpi\n");
	193	return;
	194	}
	195
	196
	197	intel_dp->active_mst_links++;
	198	temp = I915_READ(DP_TP_STATUS(port));
	199	I915_WRITE(DP_TP_STATUS(port), temp);
	200
	201	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	202	}
	203
	204	static void intel_mst_enable_dp(struct intel_encoder *encoder)
	205	{
	206	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	207	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	208	struct intel_dp *intel_dp = &intel_dig_port->dp;
	209	struct drm_device *dev = intel_dig_port->base.base.dev;
	210	struct drm_i915_private *dev_priv = dev->dev_private;
	211	enum port port = intel_dig_port->port;
	212	int ret;
	213
	214	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	215
	216	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
	217	1))
	218	DRM_ERROR("Timed out waiting for ACT sent\n");
	219
	220	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
	221
	222	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	223	}
	224
	225	static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
	226	enum pipe *pipe)
	227	{
	228	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	229	*pipe = intel_mst->pipe;
0552f765	230	if (intel_mst->connector)
0e32b39c DA	231	return true;
	232	return false;
	233	}
	234
	235	static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
5cec258b	236	struct intel_crtc_state *pipe_config)
0e32b39c DA	237	{
	238	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	239	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	240	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	241	struct drm_device *dev = encoder->base.dev;
	242	struct drm_i915_private *dev_priv = dev->dev_private;
0cb09a97	243	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
0e32b39c DA	244	u32 temp, flags = 0;
	245
	246	pipe_config->has_dp_encoder = true;
	247
	248	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	249	if (temp & TRANS_DDI_PHSYNC)
	250	flags \|= DRM_MODE_FLAG_PHSYNC;
	251	else
	252	flags \|= DRM_MODE_FLAG_NHSYNC;
	253	if (temp & TRANS_DDI_PVSYNC)
	254	flags \|= DRM_MODE_FLAG_PVSYNC;
	255	else
	256	flags \|= DRM_MODE_FLAG_NVSYNC;
	257
	258	switch (temp & TRANS_DDI_BPC_MASK) {
	259	case TRANS_DDI_BPC_6:
	260	pipe_config->pipe_bpp = 18;
	261	break;
	262	case TRANS_DDI_BPC_8:
	263	pipe_config->pipe_bpp = 24;
	264	break;
	265	case TRANS_DDI_BPC_10:
	266	pipe_config->pipe_bpp = 30;
	267	break;
	268	case TRANS_DDI_BPC_12:
	269	pipe_config->pipe_bpp = 36;
	270	break;
	271	default:
	272	break;
	273	}
2d112de7	274	pipe_config->base.adjusted_mode.flags \|= flags;
90a6b7b0 VS	275
	276	pipe_config->lane_count =
	277	((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
	278
0e32b39c DA	279	intel_dp_get_m_n(crtc, pipe_config);
	280
	281	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
	282	}
	283
	284	static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
	285	{
	286	struct intel_connector *intel_connector = to_intel_connector(connector);
	287	struct intel_dp *intel_dp = intel_connector->mst_port;
	288	struct edid *edid;
	289	int ret;
	290
0552f765 DA	291	if (!intel_dp) {
	292	return intel_connector_update_modes(connector, NULL);
	293	}
0e32b39c	294
0552f765	295	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	296	ret = intel_connector_update_modes(connector, edid);
	297	kfree(edid);
	298
	299	return ret;
	300	}
	301
	302	static enum drm_connector_status
f7f3d48a	303	intel_dp_mst_detect(struct drm_connector *connector, bool force)
0e32b39c DA	304	{
	305	struct intel_connector *intel_connector = to_intel_connector(connector);
	306	struct intel_dp *intel_dp = intel_connector->mst_port;
	307
0552f765 DA	308	if (!intel_dp)
0552f765 DA	309	return connector_status_disconnected;
c6a0aed4	310	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	311	}
0e32b39c DA	312
0e32b39c DA	313	static int
	314	intel_dp_mst_set_property(struct drm_connector *connector,
	315	struct drm_property *property,
	316	uint64_t val)
	317	{
	318	return 0;
	319	}
	320
	321	static void
	322	intel_dp_mst_connector_destroy(struct drm_connector *connector)
	323	{
	324	struct intel_connector *intel_connector = to_intel_connector(connector);
	325
	326	if (!IS_ERR_OR_NULL(intel_connector->edid))
	327	kfree(intel_connector->edid);
	328
	329	drm_connector_cleanup(connector);
	330	kfree(connector);
	331	}
	332
	333	static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
4d688a2a	334	.dpms = drm_atomic_helper_connector_dpms,
0e32b39c DA	335	.detect = intel_dp_mst_detect,
	336	.fill_modes = drm_helper_probe_single_connector_modes,
	337	.set_property = intel_dp_mst_set_property,
2545e4a6	338	.atomic_get_property = intel_connector_atomic_get_property,
c191eca1	339	.early_unregister = intel_connector_unregister,
0e32b39c	340	.destroy = intel_dp_mst_connector_destroy,
c6f95f27	341	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
98969725	342	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0e32b39c DA	343	};
	344
	345	static int intel_dp_mst_get_modes(struct drm_connector *connector)
	346	{
	347	return intel_dp_mst_get_ddc_modes(connector);
	348	}
	349
	350	static enum drm_mode_status
	351	intel_dp_mst_mode_valid(struct drm_connector *connector,
	352	struct drm_display_mode *mode)
	353	{
832d5bfd MK	354	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
832d5bfd MK	355
0e32b39c DA	356	/* TODO - validate mode against available PBN for link */
	357	if (mode->clock < 10000)
	358	return MODE_CLOCK_LOW;
	359
	360	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
	361	return MODE_H_ILLEGAL;
	362
832d5bfd MK	363	if (mode->clock > max_dotclk)
	364	return MODE_CLOCK_HIGH;
	365
0e32b39c DA	366	return MODE_OK;
	367	}
	368
459485ad DV	369	static struct drm_encoder intel_mst_atomic_best_encoder(struct drm_connector connector,
	370	struct drm_connector_state *state)
	371	{
	372	struct intel_connector *intel_connector = to_intel_connector(connector);
	373	struct intel_dp *intel_dp = intel_connector->mst_port;
	374	struct intel_crtc *crtc = to_intel_crtc(state->crtc);
	375
0552f765 DA	376	if (!intel_dp)
0552f765 DA	377	return NULL;
459485ad DV	378	return &intel_dp->mst_encoders[crtc->pipe]->base.base;
	379	}
	380
0e32b39c DA	381	static struct drm_encoder intel_mst_best_encoder(struct drm_connector connector)
	382	{
	383	struct intel_connector *intel_connector = to_intel_connector(connector);
	384	struct intel_dp *intel_dp = intel_connector->mst_port;
0552f765 DA	385	if (!intel_dp)
0552f765 DA	386	return NULL;
0e32b39c DA	387	return &intel_dp->mst_encoders[0]->base.base;
	388	}
	389
	390	static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	391	.get_modes = intel_dp_mst_get_modes,
	392	.mode_valid = intel_dp_mst_mode_valid,
459485ad	393	.atomic_best_encoder = intel_mst_atomic_best_encoder,
0e32b39c DA	394	.best_encoder = intel_mst_best_encoder,
	395	};
	396
	397	static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
	398	{
	399	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
	400
	401	drm_encoder_cleanup(encoder);
	402	kfree(intel_mst);
	403	}
	404
	405	static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
	406	.destroy = intel_dp_mst_encoder_destroy,
	407	};
	408
	409	static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
	410	{
e85376cb	411	if (connector->encoder && connector->base.state->crtc) {
0e32b39c DA	412	enum pipe pipe;
	413	if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
	414	return false;
	415	return true;
	416	}
	417	return false;
	418	}
	419
7296c849 CW	420	static void intel_connector_add_to_fbdev(struct intel_connector *connector)
7296c849 CW	421	{
0695726e	422	#ifdef CONFIG_DRM_FBDEV_EMULATION
7296c849	423	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
54632abe LW	424
	425	if (dev_priv->fbdev)
	426	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
	427	&connector->base);
7296c849 CW	428	#endif
	429	}
	430
	431	static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
	432	{
0695726e	433	#ifdef CONFIG_DRM_FBDEV_EMULATION
7296c849	434	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
54632abe LW	435
	436	if (dev_priv->fbdev)
	437	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
	438	&connector->base);
7296c849 CW	439	#endif
	440	}
	441
12e6cecd	442	static struct drm_connector intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr mgr, struct drm_dp_mst_port port, const char pathprop)
0e32b39c DA	443	{
	444	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	445	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	446	struct drm_device *dev = intel_dig_port->base.base.dev;
0e32b39c DA	447	struct intel_connector *intel_connector;
	448	struct drm_connector *connector;
	449	int i;
	450
9bdbd0b9	451	intel_connector = intel_connector_alloc();
0e32b39c DA	452	if (!intel_connector)
	453	return NULL;
	454
	455	connector = &intel_connector->base;
	456	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	457	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
	458
0e32b39c DA	459	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	460	intel_connector->mst_port = intel_dp;
	461	intel_connector->port = port;
	462
	463	for (i = PIPE_A; i <= PIPE_C; i++) {
	464	drm_mode_connector_attach_encoder(&intel_connector->base,
	465	&intel_dp->mst_encoders[i]->base.base);
	466	}
	467	intel_dp_add_properties(intel_dp, connector);
	468
	469	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
6f134d7b DA	470	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
6f134d7b DA	471
0e32b39c	472	drm_mode_connector_set_path_property(connector, pathprop);
d9515c5e DA	473	return connector;
	474	}
	475
	476	static void intel_dp_register_mst_connector(struct drm_connector *connector)
	477	{
	478	struct intel_connector *intel_connector = to_intel_connector(connector);
	479	struct drm_device *dev = connector->dev;
7a418e34	480
8bb4da1d	481	drm_modeset_lock_all(dev);
7296c849	482	intel_connector_add_to_fbdev(intel_connector);
8bb4da1d	483	drm_modeset_unlock_all(dev);
7a418e34	484
0e32b39c	485	drm_connector_register(&intel_connector->base);
0e32b39c DA	486	}
	487
	488	static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
	489	struct drm_connector *connector)
	490	{
	491	struct intel_connector *intel_connector = to_intel_connector(connector);
	492	struct drm_device *dev = connector->dev;
20fae983	493
c191eca1	494	drm_connector_unregister(connector);
1f771755	495
0e32b39c	496	/* need to nuke the connector */
8bb4da1d	497	drm_modeset_lock_all(dev);
7296c849	498	intel_connector_remove_from_fbdev(intel_connector);
0552f765	499	intel_connector->mst_port = NULL;
8bb4da1d	500	drm_modeset_unlock_all(dev);
0e32b39c	501
0552f765	502	drm_connector_unreference(&intel_connector->base);
0e32b39c DA	503	DRM_DEBUG_KMS("\n");
	504	}
	505
	506	static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
	507	{
	508	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	509	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	510	struct drm_device *dev = intel_dig_port->base.base.dev;
	511
	512	drm_kms_helper_hotplug_event(dev);
	513	}
	514
69a0f89c	515	static const struct drm_dp_mst_topology_cbs mst_cbs = {
0e32b39c	516	.add_connector = intel_dp_add_mst_connector,
d9515c5e	517	.register_connector = intel_dp_register_mst_connector,
0e32b39c DA	518	.destroy_connector = intel_dp_destroy_mst_connector,
	519	.hotplug = intel_dp_mst_hotplug,
	520	};
	521
	522	static struct intel_dp_mst_encoder *
	523	intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
	524	{
	525	struct intel_dp_mst_encoder *intel_mst;
	526	struct intel_encoder *intel_encoder;
	527	struct drm_device *dev = intel_dig_port->base.base.dev;
	528
	529	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
	530
	531	if (!intel_mst)
	532	return NULL;
	533
	534	intel_mst->pipe = pipe;
	535	intel_encoder = &intel_mst->base;
	536	intel_mst->primary = intel_dig_port;
	537
	538	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
580d8ed5	539	DRM_MODE_ENCODER_DPMST, "DP-MST %c", pipe_name(pipe));
0e32b39c DA	540
	541	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	542	intel_encoder->crtc_mask = 0x7;
	543	intel_encoder->cloneable = 0;
	544
	545	intel_encoder->compute_config = intel_dp_mst_compute_config;
	546	intel_encoder->disable = intel_mst_disable_dp;
	547	intel_encoder->post_disable = intel_mst_post_disable_dp;
	548	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	549	intel_encoder->enable = intel_mst_enable_dp;
	550	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	551	intel_encoder->get_config = intel_dp_mst_enc_get_config;
	552
	553	return intel_mst;
	554
	555	}
	556
	557	static bool
	558	intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
	559	{
	560	int i;
	561	struct intel_dp *intel_dp = &intel_dig_port->dp;
	562
	563	for (i = PIPE_A; i <= PIPE_C; i++)
	564	intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
	565	return true;
	566	}
	567
	568	int
	569	intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
	570	{
	571	struct intel_dp *intel_dp = &intel_dig_port->dp;
	572	struct drm_device *dev = intel_dig_port->base.base.dev;
	573	int ret;
	574
	575	intel_dp->can_mst = true;
	576	intel_dp->mst_mgr.cbs = &mst_cbs;
	577
	578	/* create encoders */
	579	intel_dp_create_fake_mst_encoders(intel_dig_port);
	580	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
	581	if (ret) {
	582	intel_dp->can_mst = false;
	583	return ret;
	584	}
	585	return 0;
	586	}
	587
	588	void
	589	intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
	590	{
	591	struct intel_dp *intel_dp = &intel_dig_port->dp;
	592
	593	if (!intel_dp->can_mst)
	594	return;
	595
	596	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
	597	/* encoders will get killed by normal cleanup */
	598	}