[deliverable/linux.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_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;
	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);
	intel_dp->link_bw = intel_dp_max_link_bw(intel_dp);
	intel_dp->lane_count = lane_count;

	pipe_config->pipe_bpp = 24;
	pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);

	list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
		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);

	list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
		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 = crtc->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,
	.destroy = intel_dp_mst_connector_destroy,
};

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"
	29	#include <drm/drm_crtc_helper.h>
	30	#include <drm/drm_edid.h>
	31
	32	static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
5cec258b	33	struct intel_crtc_state *pipe_config)
0e32b39c DA	34	{
	35	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	36	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	37	struct intel_dp *intel_dp = &intel_dig_port->dp;
	38	struct drm_device *dev = encoder->base.dev;
	39	int bpp;
	40	int lane_count, slots;
2d112de7	41	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
0e32b39c DA	42	struct intel_connector found = NULL, intel_connector;
	43	int mst_pbn;
	44
	45	pipe_config->dp_encoder_is_mst = true;
	46	pipe_config->has_pch_encoder = false;
	47	pipe_config->has_dp_encoder = true;
	48	bpp = 24;
	49	/*
	50	* for MST we always configure max link bw - the spec doesn't
	51	* seem to suggest we should do otherwise.
	52	*/
	53	lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
	54	intel_dp->link_bw = intel_dp_max_link_bw(intel_dp);
	55	intel_dp->lane_count = lane_count;
	56
	57	pipe_config->pipe_bpp = 24;
	58	pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
	59
	60	list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
	61	if (intel_connector->new_encoder == encoder) {
	62	found = intel_connector;
	63	break;
	64	}
	65	}
	66
	67	if (!found) {
	68	DRM_ERROR("can't find connector\n");
	69	return false;
	70	}
	71
	72	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
	73
	74	pipe_config->pbn = mst_pbn;
	75	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
	76
	77	intel_link_compute_m_n(bpp, lane_count,
	78	adjusted_mode->crtc_clock,
	79	pipe_config->port_clock,
	80	&pipe_config->dp_m_n);
	81
	82	pipe_config->dp_m_n.tu = slots;
	83	return true;
	84
	85	}
	86
	87	static void intel_mst_disable_dp(struct intel_encoder *encoder)
	88	{
	89	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	90	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	91	struct intel_dp *intel_dp = &intel_dig_port->dp;
	92	int ret;
	93
	94	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	95
	96	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
	97
	98	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	99	if (ret) {
	100	DRM_ERROR("failed to update payload %d\n", ret);
	101	}
	102	}
	103
	104	static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
	105	{
106	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
107	struct intel_digital_port *intel_dig_port = intel_mst->primary;
108	struct intel_dp *intel_dp = &intel_dig_port->dp;
109
110	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
111
112	/* this can fail */
113	drm_dp_check_act_status(&intel_dp->mst_mgr);
114	/* and this can also fail */
115	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
116
117	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
118
119	intel_dp->active_mst_links--;
120	intel_mst->port = NULL;
121	if (intel_dp->active_mst_links == 0) {
122	intel_dig_port->base.post_disable(&intel_dig_port->base);
123	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
124	}
125	}
126
127	static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
128	{
129	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
130	struct intel_digital_port *intel_dig_port = intel_mst->primary;
131	struct intel_dp *intel_dp = &intel_dig_port->dp;
132	struct drm_device *dev = encoder->base.dev;
133	struct drm_i915_private *dev_priv = dev->dev_private;
134	enum port port = intel_dig_port->port;
135	int ret;
136	uint32_t temp;
137	struct intel_connector found = NULL, intel_connector;
138	int slots;
139	struct drm_crtc *crtc = encoder->base.crtc;
140	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
141
142	list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) {
143	if (intel_connector->new_encoder == encoder) {
144	found = intel_connector;
145	break;
146	}
147	}
148
149	if (!found) {
150	DRM_ERROR("can't find connector\n");
151	return;
152	}
153
154	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
155	intel_mst->port = found->port;
156
157	if (intel_dp->active_mst_links == 0) {
158	enum port port = intel_ddi_get_encoder_port(encoder);
159
6e3c9717 ACO	160	I915_WRITE(PORT_CLK_SEL(port),
6e3c9717 ACO	161	intel_crtc->config->ddi_pll_sel);
0e32b39c DA	162
	163	intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
	164
	165	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
	166
	167
	168	intel_dp_start_link_train(intel_dp);
	169	intel_dp_complete_link_train(intel_dp);
	170	intel_dp_stop_link_train(intel_dp);
	171	}
	172
	173	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
6e3c9717 ACO	174	intel_mst->port,
6e3c9717 ACO	175	intel_crtc->config->pbn, &slots);
0e32b39c DA	176	if (ret == false) {
	177	DRM_ERROR("failed to allocate vcpi\n");
	178	return;
	179	}
	180
	181
	182	intel_dp->active_mst_links++;
	183	temp = I915_READ(DP_TP_STATUS(port));
	184	I915_WRITE(DP_TP_STATUS(port), temp);
	185
	186	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	187	}
	188
	189	static void intel_mst_enable_dp(struct intel_encoder *encoder)
	190	{
	191	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	192	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	193	struct intel_dp *intel_dp = &intel_dig_port->dp;
	194	struct drm_device *dev = intel_dig_port->base.base.dev;
	195	struct drm_i915_private *dev_priv = dev->dev_private;
	196	enum port port = intel_dig_port->port;
	197	int ret;
	198
	199	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	200
	201	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
	202	1))
	203	DRM_ERROR("Timed out waiting for ACT sent\n");
	204
	205	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
	206
	207	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	208	}
	209
	210	static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
	211	enum pipe *pipe)
	212	{
	213	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	214	*pipe = intel_mst->pipe;
	215	if (intel_mst->port)
	216	return true;
	217	return false;
	218	}
	219
	220	static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
5cec258b	221	struct intel_crtc_state *pipe_config)
0e32b39c DA	222	{
	223	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	224	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	225	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	226	struct drm_device *dev = encoder->base.dev;
	227	struct drm_i915_private *dev_priv = dev->dev_private;
6e3c9717	228	enum transcoder cpu_transcoder = crtc->config->cpu_transcoder;
0e32b39c DA	229	u32 temp, flags = 0;
	230
	231	pipe_config->has_dp_encoder = true;
	232
	233	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	234	if (temp & TRANS_DDI_PHSYNC)
	235	flags \|= DRM_MODE_FLAG_PHSYNC;
	236	else
	237	flags \|= DRM_MODE_FLAG_NHSYNC;
	238	if (temp & TRANS_DDI_PVSYNC)
	239	flags \|= DRM_MODE_FLAG_PVSYNC;
	240	else
	241	flags \|= DRM_MODE_FLAG_NVSYNC;
	242
	243	switch (temp & TRANS_DDI_BPC_MASK) {
	244	case TRANS_DDI_BPC_6:
	245	pipe_config->pipe_bpp = 18;
	246	break;
	247	case TRANS_DDI_BPC_8:
	248	pipe_config->pipe_bpp = 24;
	249	break;
	250	case TRANS_DDI_BPC_10:
	251	pipe_config->pipe_bpp = 30;
	252	break;
	253	case TRANS_DDI_BPC_12:
	254	pipe_config->pipe_bpp = 36;
	255	break;
	256	default:
	257	break;
	258	}
2d112de7	259	pipe_config->base.adjusted_mode.flags \|= flags;
0e32b39c DA	260	intel_dp_get_m_n(crtc, pipe_config);
	261
	262	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
	263	}
	264
	265	static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
	266	{
	267	struct intel_connector *intel_connector = to_intel_connector(connector);
	268	struct intel_dp *intel_dp = intel_connector->mst_port;
	269	struct edid *edid;
	270	int ret;
	271
	272	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	273	if (!edid)
	274	return 0;
	275
	276	ret = intel_connector_update_modes(connector, edid);
	277	kfree(edid);
	278
	279	return ret;
	280	}
	281
	282	static enum drm_connector_status
f7f3d48a	283	intel_dp_mst_detect(struct drm_connector *connector, bool force)
0e32b39c DA	284	{
	285	struct intel_connector *intel_connector = to_intel_connector(connector);
	286	struct intel_dp *intel_dp = intel_connector->mst_port;
	287
c6a0aed4	288	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	289	}
0e32b39c DA	290
0e32b39c DA	291	static int
	292	intel_dp_mst_set_property(struct drm_connector *connector,
	293	struct drm_property *property,
	294	uint64_t val)
	295	{
	296	return 0;
	297	}
	298
	299	static void
	300	intel_dp_mst_connector_destroy(struct drm_connector *connector)
	301	{
	302	struct intel_connector *intel_connector = to_intel_connector(connector);
	303
	304	if (!IS_ERR_OR_NULL(intel_connector->edid))
	305	kfree(intel_connector->edid);
	306
	307	drm_connector_cleanup(connector);
	308	kfree(connector);
	309	}
	310
	311	static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
	312	.dpms = intel_connector_dpms,
	313	.detect = intel_dp_mst_detect,
	314	.fill_modes = drm_helper_probe_single_connector_modes,
	315	.set_property = intel_dp_mst_set_property,
	316	.destroy = intel_dp_mst_connector_destroy,
	317	};
	318
	319	static int intel_dp_mst_get_modes(struct drm_connector *connector)
	320	{
	321	return intel_dp_mst_get_ddc_modes(connector);
	322	}
	323
	324	static enum drm_mode_status
	325	intel_dp_mst_mode_valid(struct drm_connector *connector,
	326	struct drm_display_mode *mode)
	327	{
	328	/* TODO - validate mode against available PBN for link */
	329	if (mode->clock < 10000)
	330	return MODE_CLOCK_LOW;
	331
	332	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
	333	return MODE_H_ILLEGAL;
	334
	335	return MODE_OK;
	336	}
	337
	338	static struct drm_encoder intel_mst_best_encoder(struct drm_connector connector)
	339	{
	340	struct intel_connector *intel_connector = to_intel_connector(connector);
	341	struct intel_dp *intel_dp = intel_connector->mst_port;
	342	return &intel_dp->mst_encoders[0]->base.base;
	343	}
	344
	345	static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	346	.get_modes = intel_dp_mst_get_modes,
	347	.mode_valid = intel_dp_mst_mode_valid,
	348	.best_encoder = intel_mst_best_encoder,
	349	};
	350
	351	static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
	352	{
	353	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
	354
355	drm_encoder_cleanup(encoder);
356	kfree(intel_mst);
357	}
358
359	static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
360	.destroy = intel_dp_mst_encoder_destroy,
361	};
362
363	static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
364	{
365	if (connector->encoder) {
366	enum pipe pipe;
367	if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
368	return false;
369	return true;
370	}
371	return false;
372	}
373
7296c849 CW	374	static void intel_connector_add_to_fbdev(struct intel_connector *connector)
	375	{
	376	#ifdef CONFIG_DRM_I915_FBDEV
	377	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	378	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
	379	#endif
	380	}
	381
	382	static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
	383	{
	384	#ifdef CONFIG_DRM_I915_FBDEV
	385	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	386	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
	387	#endif
	388	}
	389
12e6cecd	390	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	391	{
	392	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	393	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	394	struct drm_device *dev = intel_dig_port->base.base.dev;
0e32b39c DA	395	struct intel_connector *intel_connector;
	396	struct drm_connector *connector;
	397	int i;
	398
	399	intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
	400	if (!intel_connector)
	401	return NULL;
	402
	403	connector = &intel_connector->base;
	404	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	405	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
	406
	407	intel_connector->unregister = intel_connector_unregister;
	408	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	409	intel_connector->mst_port = intel_dp;
	410	intel_connector->port = port;
	411
	412	for (i = PIPE_A; i <= PIPE_C; i++) {
	413	drm_mode_connector_attach_encoder(&intel_connector->base,
	414	&intel_dp->mst_encoders[i]->base.base);
	415	}
	416	intel_dp_add_properties(intel_dp, connector);
	417
	418	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
6f134d7b DA	419	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
6f134d7b DA	420
0e32b39c DA	421	drm_mode_connector_set_path_property(connector, pathprop);
	422	drm_reinit_primary_mode_group(dev);
	423	mutex_lock(&dev->mode_config.mutex);
7296c849	424	intel_connector_add_to_fbdev(intel_connector);
0e32b39c DA	425	mutex_unlock(&dev->mode_config.mutex);
	426	drm_connector_register(&intel_connector->base);
	427	return connector;
	428	}
	429
	430	static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
	431	struct drm_connector *connector)
	432	{
	433	struct intel_connector *intel_connector = to_intel_connector(connector);
	434	struct drm_device *dev = connector->dev;
0e32b39c DA	435	/* need to nuke the connector */
	436	mutex_lock(&dev->mode_config.mutex);
	437	intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
	438	mutex_unlock(&dev->mode_config.mutex);
	439
	440	intel_connector->unregister(intel_connector);
	441
	442	mutex_lock(&dev->mode_config.mutex);
7296c849	443	intel_connector_remove_from_fbdev(intel_connector);
0e32b39c DA	444	drm_connector_cleanup(connector);
	445	mutex_unlock(&dev->mode_config.mutex);
	446
	447	drm_reinit_primary_mode_group(dev);
	448
	449	kfree(intel_connector);
	450	DRM_DEBUG_KMS("\n");
	451	}
	452
	453	static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
	454	{
	455	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	456	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	457	struct drm_device *dev = intel_dig_port->base.base.dev;
	458
	459	drm_kms_helper_hotplug_event(dev);
	460	}
	461
	462	static struct drm_dp_mst_topology_cbs mst_cbs = {
	463	.add_connector = intel_dp_add_mst_connector,
	464	.destroy_connector = intel_dp_destroy_mst_connector,
	465	.hotplug = intel_dp_mst_hotplug,
	466	};
	467
	468	static struct intel_dp_mst_encoder *
	469	intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
	470	{
	471	struct intel_dp_mst_encoder *intel_mst;
	472	struct intel_encoder *intel_encoder;
	473	struct drm_device *dev = intel_dig_port->base.base.dev;
	474
	475	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
	476
	477	if (!intel_mst)
	478	return NULL;
	479
	480	intel_mst->pipe = pipe;
	481	intel_encoder = &intel_mst->base;
	482	intel_mst->primary = intel_dig_port;
	483
	484	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
	485	DRM_MODE_ENCODER_DPMST);
	486
	487	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	488	intel_encoder->crtc_mask = 0x7;
	489	intel_encoder->cloneable = 0;
	490
	491	intel_encoder->compute_config = intel_dp_mst_compute_config;
	492	intel_encoder->disable = intel_mst_disable_dp;
	493	intel_encoder->post_disable = intel_mst_post_disable_dp;
	494	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	495	intel_encoder->enable = intel_mst_enable_dp;
	496	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	497	intel_encoder->get_config = intel_dp_mst_enc_get_config;
	498
	499	return intel_mst;
	500
	501	}
	502
	503	static bool
	504	intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
	505	{
	506	int i;
	507	struct intel_dp *intel_dp = &intel_dig_port->dp;
508
509	for (i = PIPE_A; i <= PIPE_C; i++)
510	intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
511	return true;
512	}
513
514	int
515	intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
516	{
517	struct intel_dp *intel_dp = &intel_dig_port->dp;
518	struct drm_device *dev = intel_dig_port->base.base.dev;
519	int ret;
520
521	intel_dp->can_mst = true;
522	intel_dp->mst_mgr.cbs = &mst_cbs;
523
524	/* create encoders */
525	intel_dp_create_fake_mst_encoders(intel_dig_port);
526	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
527	if (ret) {
528	intel_dp->can_mst = false;
529	return ret;
530	}
531	return 0;
532	}
533
534	void
535	intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
536	{
537	struct intel_dp *intel_dp = &intel_dig_port->dp;
538
539	if (!intel_dp->can_mst)
540	return;
541
542	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
543	/* encoders will get killed by normal cleanup */
544	}