[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_crtc_helper.h>
#include <drm/drm_edid.h>

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