[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, rate;
	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	struct intel_connector *found = NULL;
	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);

	rate = intel_dp_max_link_rate(intel_dp);

	if (intel_dp->num_sink_rates) {
		intel_dp->link_bw = 0;
		intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate);
	} else {
		intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate);
		intel_dp->rate_select = 0;
	}

	intel_dp->lane_count = lane_count;

	pipe_config->pipe_bpp = 24;
	pipe_config->port_clock = rate;

	state = pipe_config->base.state;

	for (i = 0; i < state->num_connector; i++) {
		if (!state->connectors[i])
			continue;

		if (state->connector_states[i]->best_encoder == &encoder->base) {
			found = to_intel_connector(state->connectors[i]);
			break;
		}
	}

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

	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->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->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->port);

	intel_dp->active_mst_links--;
	intel_mst->port = 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;
	}

	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	intel_mst->port = found->port;

	if (intel_dp->active_mst_links == 0) {
		enum port port = intel_ddi_get_encoder_port(encoder);

		I915_WRITE(PORT_CLK_SEL(port),
			   intel_crtc->config->ddi_pll_sel);

		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_complete_link_train(intel_dp);
		intel_dp_stop_link_train(intel_dp);
	}

	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
				       intel_mst->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->port)
		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;
	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;

	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	if (!edid)
		return 0;

	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;

	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 = intel_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,
	.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)
{
	/* 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;

	return MODE_OK;
}

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;
	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,
	.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) {
		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_I915_FBDEV
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	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_I915_FBDEV
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	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->unregister = intel_connector_unregister;
	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);
	drm_reinit_primary_mode_group(dev);
	mutex_lock(&dev->mode_config.mutex);
	intel_connector_add_to_fbdev(intel_connector);
	mutex_unlock(&dev->mode_config.mutex);
	drm_connector_register(&intel_connector->base);
	return connector;
}

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;
	/* need to nuke the connector */
	mutex_lock(&dev->mode_config.mutex);
	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	mutex_unlock(&dev->mode_config.mutex);

	intel_connector->unregister(intel_connector);

	mutex_lock(&dev->mode_config.mutex);
	intel_connector_remove_from_fbdev(intel_connector);
	drm_connector_cleanup(connector);
	mutex_unlock(&dev->mode_config.mutex);

	drm_reinit_primary_mode_group(dev);

	kfree(intel_connector);
	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 struct drm_dp_mst_topology_cbs mst_cbs = {
	.add_connector = intel_dp_add_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);

	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;
ed4e9c1d	41	int lane_count, slots, rate;
2d112de7	42	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
e75f4771	43	struct intel_connector *found = NULL;
0e32b39c DA	44	int mst_pbn;
	45
	46	pipe_config->dp_encoder_is_mst = true;
	47	pipe_config->has_pch_encoder = false;
	48	pipe_config->has_dp_encoder = true;
	49	bpp = 24;
	50	/*
	51	* for MST we always configure max link bw - the spec doesn't
	52	* seem to suggest we should do otherwise.
	53	*/
	54	lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
ed4e9c1d VS	55
	56	rate = intel_dp_max_link_rate(intel_dp);
	57
94ca719e	58	if (intel_dp->num_sink_rates) {
ed4e9c1d VS	59	intel_dp->link_bw = 0;
	60	intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate);
	61	} else {
	62	intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate);
	63	intel_dp->rate_select = 0;
	64	}
	65
0e32b39c DA	66	intel_dp->lane_count = lane_count;
	67
	68	pipe_config->pipe_bpp = 24;
ed4e9c1d	69	pipe_config->port_clock = rate;
0e32b39c	70
e75f4771 ACO	71	state = pipe_config->base.state;
	72
	73	for (i = 0; i < state->num_connector; i++) {
	74	if (!state->connectors[i])
	75	continue;
	76
	77	if (state->connector_states[i]->best_encoder == &encoder->base) {
	78	found = to_intel_connector(state->connectors[i]);
0e32b39c DA	79	break;
	80	}
	81	}
	82
	83	if (!found) {
	84	DRM_ERROR("can't find connector\n");
	85	return false;
	86	}
	87
	88	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
	89
	90	pipe_config->pbn = mst_pbn;
	91	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
	92
	93	intel_link_compute_m_n(bpp, lane_count,
	94	adjusted_mode->crtc_clock,
	95	pipe_config->port_clock,
	96	&pipe_config->dp_m_n);
	97
	98	pipe_config->dp_m_n.tu = slots;
	99	return true;
	100
	101	}
	102
	103	static void intel_mst_disable_dp(struct intel_encoder *encoder)
	104	{
	105	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	106	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	107	struct intel_dp *intel_dp = &intel_dig_port->dp;
	108	int ret;
	109
	110	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	111
	112	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
	113
	114	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	115	if (ret) {
	116	DRM_ERROR("failed to update payload %d\n", ret);
	117	}
	118	}
	119
	120	static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
	121	{
	122	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	123	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	124	struct intel_dp *intel_dp = &intel_dig_port->dp;
	125
	126	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	127
	128	/* this can fail */
	129	drm_dp_check_act_status(&intel_dp->mst_mgr);
	130	/* and this can also fail */
	131	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	132
	133	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
	134
	135	intel_dp->active_mst_links--;
	136	intel_mst->port = NULL;
	137	if (intel_dp->active_mst_links == 0) {
	138	intel_dig_port->base.post_disable(&intel_dig_port->base);
	139	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
	140	}
	141	}
	142
143	static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
144	{
145	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
146	struct intel_digital_port *intel_dig_port = intel_mst->primary;
147	struct intel_dp *intel_dp = &intel_dig_port->dp;
148	struct drm_device *dev = encoder->base.dev;
149	struct drm_i915_private *dev_priv = dev->dev_private;
150	enum port port = intel_dig_port->port;
151	int ret;
152	uint32_t temp;
9b4fd8f2	153	struct intel_connector found = NULL, connector;
0e32b39c DA	154	int slots;
	155	struct drm_crtc *crtc = encoder->base.crtc;
	156	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	157
9b4fd8f2 ACO	158	for_each_intel_connector(dev, connector) {
	159	if (connector->base.state->best_encoder == &encoder->base) {
	160	found = connector;
0e32b39c DA	161	break;
	162	}
	163	}
	164
	165	if (!found) {
	166	DRM_ERROR("can't find connector\n");
	167	return;
	168	}
	169
	170	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	171	intel_mst->port = found->port;
	172
	173	if (intel_dp->active_mst_links == 0) {
	174	enum port port = intel_ddi_get_encoder_port(encoder);
	175
6e3c9717 ACO	176	I915_WRITE(PORT_CLK_SEL(port),
6e3c9717 ACO	177	intel_crtc->config->ddi_pll_sel);
0e32b39c DA	178
	179	intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
	180
	181	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
	182
	183
	184	intel_dp_start_link_train(intel_dp);
	185	intel_dp_complete_link_train(intel_dp);
	186	intel_dp_stop_link_train(intel_dp);
	187	}
	188
	189	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
6e3c9717 ACO	190	intel_mst->port,
6e3c9717 ACO	191	intel_crtc->config->pbn, &slots);
0e32b39c DA	192	if (ret == false) {
	193	DRM_ERROR("failed to allocate vcpi\n");
	194	return;
	195	}
	196
	197
	198	intel_dp->active_mst_links++;
	199	temp = I915_READ(DP_TP_STATUS(port));
	200	I915_WRITE(DP_TP_STATUS(port), temp);
	201
	202	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	203	}
	204
	205	static void intel_mst_enable_dp(struct intel_encoder *encoder)
	206	{
	207	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	208	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	209	struct intel_dp *intel_dp = &intel_dig_port->dp;
	210	struct drm_device *dev = intel_dig_port->base.base.dev;
	211	struct drm_i915_private *dev_priv = dev->dev_private;
	212	enum port port = intel_dig_port->port;
	213	int ret;
	214
	215	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	216
	217	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
	218	1))
	219	DRM_ERROR("Timed out waiting for ACT sent\n");
	220
	221	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
	222
	223	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	224	}
	225
	226	static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
	227	enum pipe *pipe)
	228	{
	229	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	230	*pipe = intel_mst->pipe;
	231	if (intel_mst->port)
	232	return true;
	233	return false;
	234	}
	235
	236	static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
5cec258b	237	struct intel_crtc_state *pipe_config)
0e32b39c DA	238	{
	239	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	240	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	241	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	242	struct drm_device *dev = encoder->base.dev;
	243	struct drm_i915_private *dev_priv = dev->dev_private;
0cb09a97	244	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
0e32b39c DA	245	u32 temp, flags = 0;
	246
	247	pipe_config->has_dp_encoder = true;
	248
	249	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	250	if (temp & TRANS_DDI_PHSYNC)
	251	flags \|= DRM_MODE_FLAG_PHSYNC;
	252	else
	253	flags \|= DRM_MODE_FLAG_NHSYNC;
	254	if (temp & TRANS_DDI_PVSYNC)
	255	flags \|= DRM_MODE_FLAG_PVSYNC;
	256	else
	257	flags \|= DRM_MODE_FLAG_NVSYNC;
	258
	259	switch (temp & TRANS_DDI_BPC_MASK) {
	260	case TRANS_DDI_BPC_6:
	261	pipe_config->pipe_bpp = 18;
	262	break;
	263	case TRANS_DDI_BPC_8:
	264	pipe_config->pipe_bpp = 24;
	265	break;
	266	case TRANS_DDI_BPC_10:
	267	pipe_config->pipe_bpp = 30;
	268	break;
	269	case TRANS_DDI_BPC_12:
	270	pipe_config->pipe_bpp = 36;
	271	break;
	272	default:
	273	break;
	274	}
2d112de7	275	pipe_config->base.adjusted_mode.flags \|= flags;
0e32b39c DA	276	intel_dp_get_m_n(crtc, pipe_config);
	277
	278	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
	279	}
	280
	281	static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
	282	{
	283	struct intel_connector *intel_connector = to_intel_connector(connector);
	284	struct intel_dp *intel_dp = intel_connector->mst_port;
	285	struct edid *edid;
	286	int ret;
	287
	288	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	289	if (!edid)
	290	return 0;
	291
	292	ret = intel_connector_update_modes(connector, edid);
	293	kfree(edid);
	294
	295	return ret;
	296	}
	297
	298	static enum drm_connector_status
f7f3d48a	299	intel_dp_mst_detect(struct drm_connector *connector, bool force)
0e32b39c DA	300	{
	301	struct intel_connector *intel_connector = to_intel_connector(connector);
	302	struct intel_dp *intel_dp = intel_connector->mst_port;
	303
c6a0aed4	304	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	305	}
0e32b39c DA	306
0e32b39c DA	307	static int
	308	intel_dp_mst_set_property(struct drm_connector *connector,
	309	struct drm_property *property,
	310	uint64_t val)
	311	{
	312	return 0;
	313	}
	314
	315	static void
	316	intel_dp_mst_connector_destroy(struct drm_connector *connector)
	317	{
	318	struct intel_connector *intel_connector = to_intel_connector(connector);
	319
	320	if (!IS_ERR_OR_NULL(intel_connector->edid))
	321	kfree(intel_connector->edid);
	322
	323	drm_connector_cleanup(connector);
	324	kfree(connector);
	325	}
	326
	327	static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
	328	.dpms = intel_connector_dpms,
	329	.detect = intel_dp_mst_detect,
	330	.fill_modes = drm_helper_probe_single_connector_modes,
	331	.set_property = intel_dp_mst_set_property,
2545e4a6	332	.atomic_get_property = intel_connector_atomic_get_property,
0e32b39c	333	.destroy = intel_dp_mst_connector_destroy,
c6f95f27	334	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
98969725	335	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0e32b39c DA	336	};
	337
	338	static int intel_dp_mst_get_modes(struct drm_connector *connector)
	339	{
	340	return intel_dp_mst_get_ddc_modes(connector);
	341	}
	342
	343	static enum drm_mode_status
	344	intel_dp_mst_mode_valid(struct drm_connector *connector,
	345	struct drm_display_mode *mode)
	346	{
	347	/* TODO - validate mode against available PBN for link */
	348	if (mode->clock < 10000)
	349	return MODE_CLOCK_LOW;
	350
	351	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
	352	return MODE_H_ILLEGAL;
	353
	354	return MODE_OK;
	355	}
	356
	357	static struct drm_encoder intel_mst_best_encoder(struct drm_connector connector)
	358	{
	359	struct intel_connector *intel_connector = to_intel_connector(connector);
	360	struct intel_dp *intel_dp = intel_connector->mst_port;
	361	return &intel_dp->mst_encoders[0]->base.base;
	362	}
	363
	364	static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	365	.get_modes = intel_dp_mst_get_modes,
	366	.mode_valid = intel_dp_mst_mode_valid,
	367	.best_encoder = intel_mst_best_encoder,
	368	};
	369
	370	static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
	371	{
	372	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
	373
	374	drm_encoder_cleanup(encoder);
	375	kfree(intel_mst);
	376	}
	377
	378	static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
	379	.destroy = intel_dp_mst_encoder_destroy,
	380	};
	381
	382	static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
	383	{
	384	if (connector->encoder) {
	385	enum pipe pipe;
	386	if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
	387	return false;
	388	return true;
	389	}
	390	return false;
	391	}
	392
7296c849 CW	393	static void intel_connector_add_to_fbdev(struct intel_connector *connector)
	394	{
	395	#ifdef CONFIG_DRM_I915_FBDEV
	396	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	397	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
	398	#endif
	399	}
	400
	401	static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
	402	{
	403	#ifdef CONFIG_DRM_I915_FBDEV
	404	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	405	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
	406	#endif
	407	}
	408
12e6cecd	409	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	410	{
	411	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	412	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	413	struct drm_device *dev = intel_dig_port->base.base.dev;
0e32b39c DA	414	struct intel_connector *intel_connector;
	415	struct drm_connector *connector;
	416	int i;
	417
9bdbd0b9	418	intel_connector = intel_connector_alloc();
0e32b39c DA	419	if (!intel_connector)
	420	return NULL;
	421
	422	connector = &intel_connector->base;
	423	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	424	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
	425
	426	intel_connector->unregister = intel_connector_unregister;
	427	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	428	intel_connector->mst_port = intel_dp;
	429	intel_connector->port = port;
	430
	431	for (i = PIPE_A; i <= PIPE_C; i++) {
	432	drm_mode_connector_attach_encoder(&intel_connector->base,
	433	&intel_dp->mst_encoders[i]->base.base);
	434	}
	435	intel_dp_add_properties(intel_dp, connector);
	436
	437	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
6f134d7b DA	438	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
6f134d7b DA	439
0e32b39c DA	440	drm_mode_connector_set_path_property(connector, pathprop);
	441	drm_reinit_primary_mode_group(dev);
	442	mutex_lock(&dev->mode_config.mutex);
7296c849	443	intel_connector_add_to_fbdev(intel_connector);
0e32b39c DA	444	mutex_unlock(&dev->mode_config.mutex);
	445	drm_connector_register(&intel_connector->base);
	446	return connector;
	447	}
	448
	449	static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
	450	struct drm_connector *connector)
	451	{
	452	struct intel_connector *intel_connector = to_intel_connector(connector);
	453	struct drm_device *dev = connector->dev;
0e32b39c DA	454	/* need to nuke the connector */
	455	mutex_lock(&dev->mode_config.mutex);
	456	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	457	mutex_unlock(&dev->mode_config.mutex);
	458
	459	intel_connector->unregister(intel_connector);
	460
	461	mutex_lock(&dev->mode_config.mutex);
7296c849	462	intel_connector_remove_from_fbdev(intel_connector);
0e32b39c DA	463	drm_connector_cleanup(connector);
	464	mutex_unlock(&dev->mode_config.mutex);
	465
	466	drm_reinit_primary_mode_group(dev);
	467
	468	kfree(intel_connector);
	469	DRM_DEBUG_KMS("\n");
	470	}
	471
	472	static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
	473	{
	474	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	475	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	476	struct drm_device *dev = intel_dig_port->base.base.dev;
	477
	478	drm_kms_helper_hotplug_event(dev);
	479	}
	480
	481	static struct drm_dp_mst_topology_cbs mst_cbs = {
	482	.add_connector = intel_dp_add_mst_connector,
	483	.destroy_connector = intel_dp_destroy_mst_connector,
	484	.hotplug = intel_dp_mst_hotplug,
	485	};
	486
	487	static struct intel_dp_mst_encoder *
	488	intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
	489	{
	490	struct intel_dp_mst_encoder *intel_mst;
	491	struct intel_encoder *intel_encoder;
	492	struct drm_device *dev = intel_dig_port->base.base.dev;
	493
	494	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
	495
	496	if (!intel_mst)
	497	return NULL;
	498
	499	intel_mst->pipe = pipe;
	500	intel_encoder = &intel_mst->base;
	501	intel_mst->primary = intel_dig_port;
	502
	503	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
	504	DRM_MODE_ENCODER_DPMST);
	505
	506	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	507	intel_encoder->crtc_mask = 0x7;
	508	intel_encoder->cloneable = 0;
	509
	510	intel_encoder->compute_config = intel_dp_mst_compute_config;
	511	intel_encoder->disable = intel_mst_disable_dp;
	512	intel_encoder->post_disable = intel_mst_post_disable_dp;
	513	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	514	intel_encoder->enable = intel_mst_enable_dp;
	515	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	516	intel_encoder->get_config = intel_dp_mst_enc_get_config;
	517
	518	return intel_mst;
	519
	520	}
	521
	522	static bool
	523	intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
	524	{
	525	int i;
	526	struct intel_dp *intel_dp = &intel_dig_port->dp;
527
528	for (i = PIPE_A; i <= PIPE_C; i++)
529	intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
530	return true;
531	}
532
533	int
534	intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
535	{
536	struct intel_dp *intel_dp = &intel_dig_port->dp;
537	struct drm_device *dev = intel_dig_port->base.base.dev;
538	int ret;
539
540	intel_dp->can_mst = true;
541	intel_dp->mst_mgr.cbs = &mst_cbs;
542
543	/* create encoders */
544	intel_dp_create_fake_mst_encoders(intel_dig_port);
545	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
546	if (ret) {
547	intel_dp->can_mst = false;
548	return ret;
549	}
550	return 0;
551	}
552
553	void
554	intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
555	{
556	struct intel_dp *intel_dp = &intel_dig_port->dp;
557
558	if (!intel_dp->can_mst)
559	return;
560
561	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
562	/* encoders will get killed by normal cleanup */
563	}