[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_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>

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

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


	pipe_config->lane_count = lane_count;

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

	state = pipe_config->base.state;

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

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

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

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

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

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

	pipe_config->dp_m_n.tu = slots;
	return true;

}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

		/* FIXME: add support for SKL */
		if (INTEL_INFO(dev)->gen < 9)
			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;

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

	intel_dp_get_m_n(crtc, pipe_config);

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

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

	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 = drm_atomic_helper_connector_dpms,
	.detect = intel_dp_mst_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = intel_dp_mst_set_property,
	.atomic_get_property = intel_connector_atomic_get_property,
	.destroy = intel_dp_mst_connector_destroy,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
};

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

static enum drm_mode_status
intel_dp_mst_mode_valid(struct drm_connector *connector,
			struct drm_display_mode *mode)
{
	/* TODO - validate mode against available PBN for link */
	if (mode->clock < 10000)
		return MODE_CLOCK_LOW;

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

	return MODE_OK;
}

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

	return &intel_dp->mst_encoders[crtc->pipe]->base.base;
}

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

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

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

	drm_encoder_cleanup(encoder);
	kfree(intel_mst);
}

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

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

static void intel_connector_add_to_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_I915_FBDEV
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
#endif
}

static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_I915_FBDEV
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
#endif
}

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

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

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

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

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

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

	drm_mode_connector_set_path_property(connector, pathprop);
	drm_modeset_lock_all(dev);
	intel_connector_add_to_fbdev(intel_connector);
	drm_modeset_unlock_all(dev);
	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 */
	drm_modeset_lock_all(dev);
	if (connector->state->crtc) {
		struct drm_mode_set set;
		int ret;

		memset(&set, 0, sizeof(set));
		set.crtc = connector->state->crtc,

		ret = drm_atomic_helper_set_config(&set);

		WARN(ret, "Disabling mst crtc failed with %i\n", ret);
	}
	drm_modeset_unlock_all(dev);

	intel_connector->unregister(intel_connector);

	drm_modeset_lock_all(dev);
	intel_connector_remove_from_fbdev(intel_connector);
	drm_connector_cleanup(connector);
	drm_modeset_unlock_all(dev);

	kfree(intel_connector);
	DRM_DEBUG_KMS("\n");
}

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

	drm_kms_helper_hotplug_event(dev);
}

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

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

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

	if (!intel_mst)
		return NULL;

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

	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
			 DRM_MODE_ENCODER_DPMST);

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

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

	return intel_mst;

}

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

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

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

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

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

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

	if (!intel_dp->can_mst)
		return;

	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
	/* encoders will get killed by normal cleanup */
}
Commit	Line	Data
0e32b39c DA	1	/*
	2	* Copyright © 2008 Intel Corporation
	3	* 2014 Red Hat Inc.
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a
	6	* copy of this software and associated documentation files (the "Software"),
	7	* to deal in the Software without restriction, including without limitation
	8	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	9	* and/or sell copies of the Software, and to permit persons to whom the
	10	* Software is furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the next
	13	* paragraph) shall be included in all copies or substantial portions of the
	14	* Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	22	* IN THE SOFTWARE.
	23	*
	24	*/
	25
	26	#include <drm/drmP.h>
	27	#include "i915_drv.h"
	28	#include "intel_drv.h"
c6f95f27	29	#include <drm/drm_atomic_helper.h>
0e32b39c DA	30	#include <drm/drm_crtc_helper.h>
	31	#include <drm/drm_edid.h>
	32
	33	static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
5cec258b	34	struct intel_crtc_state *pipe_config)
0e32b39c DA	35	{
	36	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	37	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	38	struct intel_dp *intel_dp = &intel_dig_port->dp;
e75f4771 ACO	39	struct drm_atomic_state *state;
e75f4771 ACO	40	int bpp, i;
04a60f9f	41	int lane_count, slots;
2d112de7	42	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
da3ced29 ACO	43	struct drm_connector *drm_connector;
	44	struct intel_connector connector, found = NULL;
	45	struct drm_connector_state *connector_state;
0e32b39c DA	46	int mst_pbn;
	47
	48	pipe_config->dp_encoder_is_mst = true;
	49	pipe_config->has_pch_encoder = false;
	50	pipe_config->has_dp_encoder = true;
	51	bpp = 24;
	52	/*
	53	* for MST we always configure max link bw - the spec doesn't
	54	* seem to suggest we should do otherwise.
	55	*/
	56	lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
ed4e9c1d	57
ed4e9c1d	58
90a6b7b0	59	pipe_config->lane_count = lane_count;
0e32b39c DA	60
0e32b39c DA	61	pipe_config->pipe_bpp = 24;
04a60f9f	62	pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);
0e32b39c	63
e75f4771 ACO	64	state = pipe_config->base.state;
e75f4771 ACO	65
da3ced29 ACO	66	for_each_connector_in_state(state, drm_connector, connector_state, i) {
da3ced29 ACO	67	connector = to_intel_connector(drm_connector);
e75f4771	68
da3ced29 ACO	69	if (connector_state->best_encoder == &encoder->base) {
da3ced29 ACO	70	found = connector;
0e32b39c DA	71	break;
	72	}
	73	}
	74
	75	if (!found) {
	76	DRM_ERROR("can't find connector\n");
	77	return false;
	78	}
	79
	80	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
	81
	82	pipe_config->pbn = mst_pbn;
	83	slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
	84
	85	intel_link_compute_m_n(bpp, lane_count,
	86	adjusted_mode->crtc_clock,
	87	pipe_config->port_clock,
	88	&pipe_config->dp_m_n);
	89
	90	pipe_config->dp_m_n.tu = slots;
	91	return true;
	92
	93	}
	94
	95	static void intel_mst_disable_dp(struct intel_encoder *encoder)
	96	{
	97	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	98	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	99	struct intel_dp *intel_dp = &intel_dig_port->dp;
	100	int ret;
	101
	102	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	103
	104	drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
	105
	106	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	107	if (ret) {
	108	DRM_ERROR("failed to update payload %d\n", ret);
	109	}
	110	}
	111
	112	static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
	113	{
	114	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	115	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	116	struct intel_dp *intel_dp = &intel_dig_port->dp;
	117
	118	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	119
	120	/* this can fail */
	121	drm_dp_check_act_status(&intel_dp->mst_mgr);
	122	/* and this can also fail */
	123	drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	124
	125	drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
	126
	127	intel_dp->active_mst_links--;
	128	intel_mst->port = NULL;
	129	if (intel_dp->active_mst_links == 0) {
	130	intel_dig_port->base.post_disable(&intel_dig_port->base);
	131	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
	132	}
	133	}
	134
135	static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
136	{
137	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
138	struct intel_digital_port *intel_dig_port = intel_mst->primary;
139	struct intel_dp *intel_dp = &intel_dig_port->dp;
140	struct drm_device *dev = encoder->base.dev;
141	struct drm_i915_private *dev_priv = dev->dev_private;
142	enum port port = intel_dig_port->port;
143	int ret;
144	uint32_t temp;
9b4fd8f2	145	struct intel_connector found = NULL, connector;
0e32b39c DA	146	int slots;
	147	struct drm_crtc *crtc = encoder->base.crtc;
	148	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	149
9b4fd8f2 ACO	150	for_each_intel_connector(dev, connector) {
	151	if (connector->base.state->best_encoder == &encoder->base) {
	152	found = connector;
0e32b39c DA	153	break;
	154	}
	155	}
	156
	157	if (!found) {
	158	DRM_ERROR("can't find connector\n");
	159	return;
	160	}
	161
	162	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	163	intel_mst->port = found->port;
	164
	165	if (intel_dp->active_mst_links == 0) {
	166	enum port port = intel_ddi_get_encoder_port(encoder);
	167
1ab23380 S	168	/* FIXME: add support for SKL */
	169	if (INTEL_INFO(dev)->gen < 9)
	170	I915_WRITE(PORT_CLK_SEL(port),
	171	intel_crtc->config->ddi_pll_sel);
0e32b39c DA	172
	173	intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
	174
	175	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
	176
	177
	178	intel_dp_start_link_train(intel_dp);
	179	intel_dp_complete_link_train(intel_dp);
	180	intel_dp_stop_link_train(intel_dp);
	181	}
	182
	183	ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
6e3c9717 ACO	184	intel_mst->port,
6e3c9717 ACO	185	intel_crtc->config->pbn, &slots);
0e32b39c DA	186	if (ret == false) {
	187	DRM_ERROR("failed to allocate vcpi\n");
	188	return;
	189	}
	190
	191
	192	intel_dp->active_mst_links++;
	193	temp = I915_READ(DP_TP_STATUS(port));
	194	I915_WRITE(DP_TP_STATUS(port), temp);
	195
	196	ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
	197	}
	198
	199	static void intel_mst_enable_dp(struct intel_encoder *encoder)
	200	{
	201	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	202	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	203	struct intel_dp *intel_dp = &intel_dig_port->dp;
	204	struct drm_device *dev = intel_dig_port->base.base.dev;
	205	struct drm_i915_private *dev_priv = dev->dev_private;
	206	enum port port = intel_dig_port->port;
	207	int ret;
	208
	209	DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
	210
	211	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
	212	1))
	213	DRM_ERROR("Timed out waiting for ACT sent\n");
	214
	215	ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
	216
	217	ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
	218	}
	219
	220	static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
	221	enum pipe *pipe)
	222	{
	223	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	224	*pipe = intel_mst->pipe;
	225	if (intel_mst->port)
	226	return true;
	227	return false;
	228	}
	229
	230	static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
5cec258b	231	struct intel_crtc_state *pipe_config)
0e32b39c DA	232	{
	233	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	234	struct intel_digital_port *intel_dig_port = intel_mst->primary;
	235	struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
	236	struct drm_device *dev = encoder->base.dev;
	237	struct drm_i915_private *dev_priv = dev->dev_private;
0cb09a97	238	enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
0e32b39c DA	239	u32 temp, flags = 0;
	240
	241	pipe_config->has_dp_encoder = true;
	242
	243	temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
	244	if (temp & TRANS_DDI_PHSYNC)
	245	flags \|= DRM_MODE_FLAG_PHSYNC;
	246	else
	247	flags \|= DRM_MODE_FLAG_NHSYNC;
	248	if (temp & TRANS_DDI_PVSYNC)
	249	flags \|= DRM_MODE_FLAG_PVSYNC;
	250	else
	251	flags \|= DRM_MODE_FLAG_NVSYNC;
	252
	253	switch (temp & TRANS_DDI_BPC_MASK) {
	254	case TRANS_DDI_BPC_6:
	255	pipe_config->pipe_bpp = 18;
	256	break;
	257	case TRANS_DDI_BPC_8:
	258	pipe_config->pipe_bpp = 24;
	259	break;
	260	case TRANS_DDI_BPC_10:
	261	pipe_config->pipe_bpp = 30;
	262	break;
	263	case TRANS_DDI_BPC_12:
	264	pipe_config->pipe_bpp = 36;
	265	break;
	266	default:
	267	break;
	268	}
2d112de7	269	pipe_config->base.adjusted_mode.flags \|= flags;
90a6b7b0 VS	270
	271	pipe_config->lane_count =
	272	((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
	273
0e32b39c DA	274	intel_dp_get_m_n(crtc, pipe_config);
	275
	276	intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
	277	}
	278
	279	static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
	280	{
	281	struct intel_connector *intel_connector = to_intel_connector(connector);
	282	struct intel_dp *intel_dp = intel_connector->mst_port;
	283	struct edid *edid;
	284	int ret;
	285
	286	edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
	287	if (!edid)
	288	return 0;
	289
	290	ret = intel_connector_update_modes(connector, edid);
	291	kfree(edid);
	292
	293	return ret;
	294	}
	295
	296	static enum drm_connector_status
f7f3d48a	297	intel_dp_mst_detect(struct drm_connector *connector, bool force)
0e32b39c DA	298	{
	299	struct intel_connector *intel_connector = to_intel_connector(connector);
	300	struct intel_dp *intel_dp = intel_connector->mst_port;
	301
c6a0aed4	302	return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
0e32b39c DA	303	}
0e32b39c DA	304
0e32b39c DA	305	static int
	306	intel_dp_mst_set_property(struct drm_connector *connector,
	307	struct drm_property *property,
	308	uint64_t val)
	309	{
	310	return 0;
	311	}
	312
	313	static void
	314	intel_dp_mst_connector_destroy(struct drm_connector *connector)
	315	{
	316	struct intel_connector *intel_connector = to_intel_connector(connector);
	317
	318	if (!IS_ERR_OR_NULL(intel_connector->edid))
	319	kfree(intel_connector->edid);
	320
	321	drm_connector_cleanup(connector);
	322	kfree(connector);
	323	}
	324
	325	static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
4d688a2a	326	.dpms = drm_atomic_helper_connector_dpms,
0e32b39c DA	327	.detect = intel_dp_mst_detect,
	328	.fill_modes = drm_helper_probe_single_connector_modes,
	329	.set_property = intel_dp_mst_set_property,
2545e4a6	330	.atomic_get_property = intel_connector_atomic_get_property,
0e32b39c	331	.destroy = intel_dp_mst_connector_destroy,
c6f95f27	332	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
98969725	333	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0e32b39c DA	334	};
	335
	336	static int intel_dp_mst_get_modes(struct drm_connector *connector)
	337	{
	338	return intel_dp_mst_get_ddc_modes(connector);
	339	}
	340
	341	static enum drm_mode_status
	342	intel_dp_mst_mode_valid(struct drm_connector *connector,
	343	struct drm_display_mode *mode)
	344	{
	345	/* TODO - validate mode against available PBN for link */
	346	if (mode->clock < 10000)
	347	return MODE_CLOCK_LOW;
	348
	349	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
	350	return MODE_H_ILLEGAL;
	351
	352	return MODE_OK;
	353	}
	354
459485ad DV	355	static struct drm_encoder intel_mst_atomic_best_encoder(struct drm_connector connector,
	356	struct drm_connector_state *state)
	357	{
	358	struct intel_connector *intel_connector = to_intel_connector(connector);
	359	struct intel_dp *intel_dp = intel_connector->mst_port;
	360	struct intel_crtc *crtc = to_intel_crtc(state->crtc);
	361
	362	return &intel_dp->mst_encoders[crtc->pipe]->base.base;
	363	}
	364
0e32b39c DA	365	static struct drm_encoder intel_mst_best_encoder(struct drm_connector connector)
	366	{
	367	struct intel_connector *intel_connector = to_intel_connector(connector);
	368	struct intel_dp *intel_dp = intel_connector->mst_port;
	369	return &intel_dp->mst_encoders[0]->base.base;
	370	}
	371
	372	static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
	373	.get_modes = intel_dp_mst_get_modes,
	374	.mode_valid = intel_dp_mst_mode_valid,
459485ad	375	.atomic_best_encoder = intel_mst_atomic_best_encoder,
0e32b39c DA	376	.best_encoder = intel_mst_best_encoder,
	377	};
	378
	379	static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
	380	{
	381	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
	382
	383	drm_encoder_cleanup(encoder);
	384	kfree(intel_mst);
	385	}
	386
	387	static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
	388	.destroy = intel_dp_mst_encoder_destroy,
	389	};
	390
	391	static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
	392	{
	393	if (connector->encoder) {
	394	enum pipe pipe;
	395	if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
	396	return false;
	397	return true;
	398	}
	399	return false;
	400	}
	401
7296c849 CW	402	static void intel_connector_add_to_fbdev(struct intel_connector *connector)
	403	{
	404	#ifdef CONFIG_DRM_I915_FBDEV
	405	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	406	drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
	407	#endif
	408	}
	409
	410	static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
	411	{
	412	#ifdef CONFIG_DRM_I915_FBDEV
	413	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	414	drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
	415	#endif
	416	}
	417
12e6cecd	418	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	419	{
	420	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	421	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	422	struct drm_device *dev = intel_dig_port->base.base.dev;
0e32b39c DA	423	struct intel_connector *intel_connector;
	424	struct drm_connector *connector;
	425	int i;
	426
9bdbd0b9	427	intel_connector = intel_connector_alloc();
0e32b39c DA	428	if (!intel_connector)
	429	return NULL;
	430
	431	connector = &intel_connector->base;
	432	drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
	433	drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
	434
	435	intel_connector->unregister = intel_connector_unregister;
	436	intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
	437	intel_connector->mst_port = intel_dp;
	438	intel_connector->port = port;
	439
	440	for (i = PIPE_A; i <= PIPE_C; i++) {
	441	drm_mode_connector_attach_encoder(&intel_connector->base,
	442	&intel_dp->mst_encoders[i]->base.base);
	443	}
	444	intel_dp_add_properties(intel_dp, connector);
	445
	446	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
6f134d7b DA	447	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
6f134d7b DA	448
0e32b39c	449	drm_mode_connector_set_path_property(connector, pathprop);
8bb4da1d	450	drm_modeset_lock_all(dev);
7296c849	451	intel_connector_add_to_fbdev(intel_connector);
8bb4da1d	452	drm_modeset_unlock_all(dev);
0e32b39c DA	453	drm_connector_register(&intel_connector->base);
	454	return connector;
	455	}
	456
	457	static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
	458	struct drm_connector *connector)
	459	{
	460	struct intel_connector *intel_connector = to_intel_connector(connector);
	461	struct drm_device *dev = connector->dev;
20fae983	462
0e32b39c	463	/* need to nuke the connector */
8bb4da1d	464	drm_modeset_lock_all(dev);
20fae983 ML	465	if (connector->state->crtc) {
	466	struct drm_mode_set set;
	467	int ret;
	468
	469	memset(&set, 0, sizeof(set));
	470	set.crtc = connector->state->crtc,
	471
	472	ret = drm_atomic_helper_set_config(&set);
	473
	474	WARN(ret, "Disabling mst crtc failed with %i\n", ret);
	475	}
8bb4da1d	476	drm_modeset_unlock_all(dev);
0e32b39c DA	477
	478	intel_connector->unregister(intel_connector);
	479
8bb4da1d	480	drm_modeset_lock_all(dev);
7296c849	481	intel_connector_remove_from_fbdev(intel_connector);
0e32b39c	482	drm_connector_cleanup(connector);
8bb4da1d	483	drm_modeset_unlock_all(dev);
0e32b39c	484
0e32b39c DA	485	kfree(intel_connector);
	486	DRM_DEBUG_KMS("\n");
	487	}
	488
	489	static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
	490	{
	491	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
	492	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	493	struct drm_device *dev = intel_dig_port->base.base.dev;
	494
	495	drm_kms_helper_hotplug_event(dev);
	496	}
	497
	498	static struct drm_dp_mst_topology_cbs mst_cbs = {
	499	.add_connector = intel_dp_add_mst_connector,
	500	.destroy_connector = intel_dp_destroy_mst_connector,
	501	.hotplug = intel_dp_mst_hotplug,
	502	};
	503
	504	static struct intel_dp_mst_encoder *
	505	intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
	506	{
	507	struct intel_dp_mst_encoder *intel_mst;
	508	struct intel_encoder *intel_encoder;
	509	struct drm_device *dev = intel_dig_port->base.base.dev;
	510
	511	intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
	512
	513	if (!intel_mst)
	514	return NULL;
	515
	516	intel_mst->pipe = pipe;
	517	intel_encoder = &intel_mst->base;
	518	intel_mst->primary = intel_dig_port;
	519
	520	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
	521	DRM_MODE_ENCODER_DPMST);
	522
	523	intel_encoder->type = INTEL_OUTPUT_DP_MST;
	524	intel_encoder->crtc_mask = 0x7;
	525	intel_encoder->cloneable = 0;
	526
	527	intel_encoder->compute_config = intel_dp_mst_compute_config;
	528	intel_encoder->disable = intel_mst_disable_dp;
	529	intel_encoder->post_disable = intel_mst_post_disable_dp;
	530	intel_encoder->pre_enable = intel_mst_pre_enable_dp;
	531	intel_encoder->enable = intel_mst_enable_dp;
	532	intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
	533	intel_encoder->get_config = intel_dp_mst_enc_get_config;
	534
	535	return intel_mst;
	536
	537	}
	538
	539	static bool
	540	intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
	541	{
	542	int i;
	543	struct intel_dp *intel_dp = &intel_dig_port->dp;
	544
	545	for (i = PIPE_A; i <= PIPE_C; i++)
	546	intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
	547	return true;
	548	}
549
550	int
551	intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
552	{
553	struct intel_dp *intel_dp = &intel_dig_port->dp;
554	struct drm_device *dev = intel_dig_port->base.base.dev;
555	int ret;
556
557	intel_dp->can_mst = true;
558	intel_dp->mst_mgr.cbs = &mst_cbs;
559
560	/* create encoders */
561	intel_dp_create_fake_mst_encoders(intel_dig_port);
562	ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
563	if (ret) {
564	intel_dp->can_mst = false;
565	return ret;
566	}
567	return 0;
568	}
569
570	void
571	intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
572	{
573	struct intel_dp *intel_dp = &intel_dig_port->dp;
574
575	if (!intel_dp->can_mst)
576	return;
577
578	drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
579	/* encoders will get killed by normal cleanup */
580	}