[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_device *dev = encoder->base.dev;
	int bpp;
	int lane_count, slots, rate;
	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	struct intel_connector *found = NULL, *intel_connector;
	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;

	for_each_intel_connector(dev, intel_connector) {
		if (intel_connector->new_encoder == encoder) {
			found = intel_connector;
			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, *intel_connector;
	int slots;
	struct drm_crtc *crtc = encoder->base.crtc;
	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	for_each_intel_connector(dev, intel_connector) {
		if (intel_connector->new_encoder == encoder) {
			found = intel_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,
};

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 = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
	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;
	39	struct drm_device *dev = encoder->base.dev;
	40	int bpp;
ed4e9c1d	41	int lane_count, slots, rate;
2d112de7	42	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
0e32b39c DA	43	struct intel_connector found = NULL, intel_connector;
	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
3a3371ff	71	for_each_intel_connector(dev, intel_connector) {
0e32b39c DA	72	if (intel_connector->new_encoder == encoder) {
	73	found = intel_connector;
	74	break;
	75	}
	76	}
	77
	78	if (!found) {
	79	DRM_ERROR("can't find connector\n");
	80	return false;
	81	}
	82
	83	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
	84
	85	pipe_config->pbn = mst_pbn;
	86	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
	87
	88	intel_link_compute_m_n(bpp, lane_count,
	89	adjusted_mode->crtc_clock,
	90	pipe_config->port_clock,
	91	&pipe_config->dp_m_n);
	92
	93	pipe_config->dp_m_n.tu = slots;
	94	return true;
	95
	96	}
	97
	98	static void intel_mst_disable_dp(struct intel_encoder *encoder)
	99	{
	100	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	101	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	102	struct intel_dp *intel_dp = &intel_dig_port->dp;
	103	int ret;
	104
	105	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	106
	107	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
	108
	109	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	110	if (ret) {
	111	DRM_ERROR("failed to update payload %d\n", ret);
	112	}
	113	}
	114
	115	static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
	116	{
	117	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	118	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	119	struct intel_dp *intel_dp = &intel_dig_port->dp;
	120
	121	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	122
	123	/* this can fail */
	124	drm_dp_check_act_status(&intel_dp->mst_mgr);
	125	/* and this can also fail */
	126	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	127
	128	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
	129
	130	intel_dp->active_mst_links--;
	131	intel_mst->port = NULL;
	132	if (intel_dp->active_mst_links == 0) {
	133	intel_dig_port->base.post_disable(&intel_dig_port->base);
	134	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
	135	}
136	}
137
138	static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
139	{
140	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
141	struct intel_digital_port *intel_dig_port = intel_mst->primary;
142	struct intel_dp *intel_dp = &intel_dig_port->dp;
143	struct drm_device *dev = encoder->base.dev;
144	struct drm_i915_private *dev_priv = dev->dev_private;
145	enum port port = intel_dig_port->port;
146	int ret;
147	uint32_t temp;
148	struct intel_connector found = NULL, intel_connector;
149	int slots;
150	struct drm_crtc *crtc = encoder->base.crtc;
151	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
152
3a3371ff	153	for_each_intel_connector(dev, intel_connector) {
0e32b39c DA	154	if (intel_connector->new_encoder == encoder) {
	155	found = intel_connector;
	156	break;
	157	}
	158	}
	159
	160	if (!found) {
	161	DRM_ERROR("can't find connector\n");
	162	return;
	163	}
	164
	165	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	166	intel_mst->port = found->port;
	167
	168	if (intel_dp->active_mst_links == 0) {
	169	enum port port = intel_ddi_get_encoder_port(encoder);
	170
6e3c9717 ACO	171	I915_WRITE(PORT_CLK_SEL(port),
6e3c9717 ACO	172	intel_crtc->config->ddi_pll_sel);
0e32b39c DA	173
	174	intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
	175
	176	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
	177
	178
	179	intel_dp_start_link_train(intel_dp);
	180	intel_dp_complete_link_train(intel_dp);
	181	intel_dp_stop_link_train(intel_dp);
	182	}
	183
	184	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
6e3c9717 ACO	185	intel_mst->port,
6e3c9717 ACO	186	intel_crtc->config->pbn, &slots);
0e32b39c DA	187	if (ret == false) {
	188	DRM_ERROR("failed to allocate vcpi\n");
	189	return;
	190	}
	191
	192
	193	intel_dp->active_mst_links++;
	194	temp = I915_READ(DP_TP_STATUS(port));
	195	I915_WRITE(DP_TP_STATUS(port), temp);
	196
	197	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	198	}
	199
	200	static void intel_mst_enable_dp(struct intel_encoder *encoder)
	201	{
	202	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	203	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	204	struct intel_dp *intel_dp = &intel_dig_port->dp;
	205	struct drm_device *dev = intel_dig_port->base.base.dev;
	206	struct drm_i915_private *dev_priv = dev->dev_private;
	207	enum port port = intel_dig_port->port;
	208	int ret;
	209
	210	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	211
	212	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
	213	1))
	214	DRM_ERROR("Timed out waiting for ACT sent\n");
	215
	216	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
	217
	218	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	219	}
	220
	221	static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
	222	enum pipe *pipe)
	223	{
	224	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	225	*pipe = intel_mst->pipe;
	226	if (intel_mst->port)
	227	return true;
	228	return false;
	229	}
	230
	231	static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
5cec258b	232	struct intel_crtc_state *pipe_config)
0e32b39c DA	233	{
	234	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	235	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	236	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	237	struct drm_device *dev = encoder->base.dev;
	238	struct drm_i915_private *dev_priv = dev->dev_private;
0cb09a97	239	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
0e32b39c DA	240	u32 temp, flags = 0;
	241
	242	pipe_config->has_dp_encoder = true;
	243
	244	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	245	if (temp & TRANS_DDI_PHSYNC)
	246	flags \|= DRM_MODE_FLAG_PHSYNC;
	247	else
	248	flags \|= DRM_MODE_FLAG_NHSYNC;
	249	if (temp & TRANS_DDI_PVSYNC)
	250	flags \|= DRM_MODE_FLAG_PVSYNC;
	251	else
	252	flags \|= DRM_MODE_FLAG_NVSYNC;
	253
	254	switch (temp & TRANS_DDI_BPC_MASK) {
	255	case TRANS_DDI_BPC_6:
	256	pipe_config->pipe_bpp = 18;
	257	break;
	258	case TRANS_DDI_BPC_8:
	259	pipe_config->pipe_bpp = 24;
	260	break;
	261	case TRANS_DDI_BPC_10:
	262	pipe_config->pipe_bpp = 30;
	263	break;
	264	case TRANS_DDI_BPC_12:
	265	pipe_config->pipe_bpp = 36;
	266	break;
	267	default:
	268	break;
	269	}
2d112de7	270	pipe_config->base.adjusted_mode.flags \|= flags;
0e32b39c DA	271	intel_dp_get_m_n(crtc, pipe_config);
	272
	273	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
	274	}
	275
	276	static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
	277	{
	278	struct intel_connector *intel_connector = to_intel_connector(connector);
	279	struct intel_dp *intel_dp = intel_connector->mst_port;
	280	struct edid *edid;
	281	int ret;
	282
	283	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	284	if (!edid)
	285	return 0;
	286
	287	ret = intel_connector_update_modes(connector, edid);
	288	kfree(edid);
	289
	290	return ret;
	291	}
	292
	293	static enum drm_connector_status
f7f3d48a	294	intel_dp_mst_detect(struct drm_connector *connector, bool force)
0e32b39c DA	295	{
	296	struct intel_connector *intel_connector = to_intel_connector(connector);
	297	struct intel_dp *intel_dp = intel_connector->mst_port;
	298
c6a0aed4	299	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	300	}
0e32b39c DA	301
0e32b39c DA	302	static int
	303	intel_dp_mst_set_property(struct drm_connector *connector,
	304	struct drm_property *property,
	305	uint64_t val)
	306	{
	307	return 0;
	308	}
	309
	310	static void
	311	intel_dp_mst_connector_destroy(struct drm_connector *connector)
	312	{
	313	struct intel_connector *intel_connector = to_intel_connector(connector);
	314
	315	if (!IS_ERR_OR_NULL(intel_connector->edid))
	316	kfree(intel_connector->edid);
	317
	318	drm_connector_cleanup(connector);
	319	kfree(connector);
	320	}
	321
	322	static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
	323	.dpms = intel_connector_dpms,
	324	.detect = intel_dp_mst_detect,
	325	.fill_modes = drm_helper_probe_single_connector_modes,
	326	.set_property = intel_dp_mst_set_property,
2545e4a6	327	.atomic_get_property = intel_connector_atomic_get_property,
0e32b39c	328	.destroy = intel_dp_mst_connector_destroy,
c6f95f27	329	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
0e32b39c DA	330	};
	331
	332	static int intel_dp_mst_get_modes(struct drm_connector *connector)
	333	{
	334	return intel_dp_mst_get_ddc_modes(connector);
	335	}
	336
	337	static enum drm_mode_status
	338	intel_dp_mst_mode_valid(struct drm_connector *connector,
	339	struct drm_display_mode *mode)
	340	{
	341	/* TODO - validate mode against available PBN for link */
	342	if (mode->clock < 10000)
	343	return MODE_CLOCK_LOW;
	344
	345	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
	346	return MODE_H_ILLEGAL;
	347
	348	return MODE_OK;
	349	}
	350
	351	static struct drm_encoder intel_mst_best_encoder(struct drm_connector connector)
	352	{
	353	struct intel_connector *intel_connector = to_intel_connector(connector);
	354	struct intel_dp *intel_dp = intel_connector->mst_port;
	355	return &intel_dp->mst_encoders[0]->base.base;
	356	}
	357
	358	static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	359	.get_modes = intel_dp_mst_get_modes,
	360	.mode_valid = intel_dp_mst_mode_valid,
	361	.best_encoder = intel_mst_best_encoder,
	362	};
	363
	364	static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
	365	{
	366	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
	367
	368	drm_encoder_cleanup(encoder);
	369	kfree(intel_mst);
	370	}
	371
	372	static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
	373	.destroy = intel_dp_mst_encoder_destroy,
	374	};
	375
	376	static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
	377	{
	378	if (connector->encoder) {
	379	enum pipe pipe;
	380	if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
	381	return false;
	382	return true;
	383	}
	384	return false;
	385	}
	386
7296c849 CW	387	static void intel_connector_add_to_fbdev(struct intel_connector *connector)
	388	{
	389	#ifdef CONFIG_DRM_I915_FBDEV
	390	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	391	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
	392	#endif
	393	}
	394
	395	static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
	396	{
	397	#ifdef CONFIG_DRM_I915_FBDEV
	398	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	399	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
	400	#endif
	401	}
	402
12e6cecd	403	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	404	{
	405	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	406	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	407	struct drm_device *dev = intel_dig_port->base.base.dev;
0e32b39c DA	408	struct intel_connector *intel_connector;
	409	struct drm_connector *connector;
	410	int i;
	411
	412	intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
	413	if (!intel_connector)
	414	return NULL;
	415
	416	connector = &intel_connector->base;
	417	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	418	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
	419
	420	intel_connector->unregister = intel_connector_unregister;
	421	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	422	intel_connector->mst_port = intel_dp;
	423	intel_connector->port = port;
	424
	425	for (i = PIPE_A; i <= PIPE_C; i++) {
	426	drm_mode_connector_attach_encoder(&intel_connector->base,
	427	&intel_dp->mst_encoders[i]->base.base);
	428	}
	429	intel_dp_add_properties(intel_dp, connector);
	430
	431	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
6f134d7b DA	432	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
6f134d7b DA	433
0e32b39c DA	434	drm_mode_connector_set_path_property(connector, pathprop);
	435	drm_reinit_primary_mode_group(dev);
	436	mutex_lock(&dev->mode_config.mutex);
7296c849	437	intel_connector_add_to_fbdev(intel_connector);
0e32b39c DA	438	mutex_unlock(&dev->mode_config.mutex);
	439	drm_connector_register(&intel_connector->base);
	440	return connector;
	441	}
	442
	443	static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
	444	struct drm_connector *connector)
	445	{
	446	struct intel_connector *intel_connector = to_intel_connector(connector);
	447	struct drm_device *dev = connector->dev;
0e32b39c DA	448	/* need to nuke the connector */
	449	mutex_lock(&dev->mode_config.mutex);
	450	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	451	mutex_unlock(&dev->mode_config.mutex);
	452
	453	intel_connector->unregister(intel_connector);
	454
	455	mutex_lock(&dev->mode_config.mutex);
7296c849	456	intel_connector_remove_from_fbdev(intel_connector);
0e32b39c DA	457	drm_connector_cleanup(connector);
	458	mutex_unlock(&dev->mode_config.mutex);
	459
	460	drm_reinit_primary_mode_group(dev);
	461
	462	kfree(intel_connector);
	463	DRM_DEBUG_KMS("\n");
	464	}
	465
	466	static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
	467	{
	468	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	469	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	470	struct drm_device *dev = intel_dig_port->base.base.dev;
	471
	472	drm_kms_helper_hotplug_event(dev);
	473	}
	474
	475	static struct drm_dp_mst_topology_cbs mst_cbs = {
	476	.add_connector = intel_dp_add_mst_connector,
	477	.destroy_connector = intel_dp_destroy_mst_connector,
	478	.hotplug = intel_dp_mst_hotplug,
	479	};
	480
	481	static struct intel_dp_mst_encoder *
	482	intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
	483	{
	484	struct intel_dp_mst_encoder *intel_mst;
	485	struct intel_encoder *intel_encoder;
	486	struct drm_device *dev = intel_dig_port->base.base.dev;
	487
	488	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
	489
	490	if (!intel_mst)
	491	return NULL;
	492
	493	intel_mst->pipe = pipe;
	494	intel_encoder = &intel_mst->base;
	495	intel_mst->primary = intel_dig_port;
	496
	497	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
	498	DRM_MODE_ENCODER_DPMST);
	499
	500	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	501	intel_encoder->crtc_mask = 0x7;
	502	intel_encoder->cloneable = 0;
	503
	504	intel_encoder->compute_config = intel_dp_mst_compute_config;
	505	intel_encoder->disable = intel_mst_disable_dp;
	506	intel_encoder->post_disable = intel_mst_post_disable_dp;
	507	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	508	intel_encoder->enable = intel_mst_enable_dp;
	509	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	510	intel_encoder->get_config = intel_dp_mst_enc_get_config;
	511
	512	return intel_mst;
	513
	514	}
	515
	516	static bool
	517	intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
	518	{
	519	int i;
	520	struct intel_dp *intel_dp = &intel_dig_port->dp;
521
522	for (i = PIPE_A; i <= PIPE_C; i++)
523	intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
524	return true;
525	}
526
527	int
528	intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
529	{
530	struct intel_dp *intel_dp = &intel_dig_port->dp;
531	struct drm_device *dev = intel_dig_port->base.base.dev;
532	int ret;
533
534	intel_dp->can_mst = true;
535	intel_dp->mst_mgr.cbs = &mst_cbs;
536
537	/* create encoders */
538	intel_dp_create_fake_mst_encoders(intel_dig_port);
539	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
540	if (ret) {
541	intel_dp->can_mst = false;
542	return ret;
543	}
544	return 0;
545	}
546
547	void
548	intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
549	{
550	struct intel_dp *intel_dp = &intel_dig_port->dp;
551
552	if (!intel_dp->can_mst)
553	return;
554
555	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
556	/* encoders will get killed by normal cleanup */
557	}