Exemple #1
0
static enum drm_mode_status
intel_dp_mst_mode_valid(struct drm_connector *connector,
			struct drm_display_mode *mode)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_dp *intel_dp = intel_connector->mst_port;
	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
	int max_rate, mode_rate, max_lanes, max_link_clock;

	if (drm_connector_is_unregistered(connector))
		return MODE_ERROR;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return MODE_NO_DBLESCAN;

	max_link_clock = intel_dp_max_link_rate(intel_dp);
	max_lanes = intel_dp_max_lane_count(intel_dp);

	max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
	mode_rate = intel_dp_link_required(mode->clock, 18);

	/* 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;

	if (mode_rate > max_rate || mode->clock > max_dotclk)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}
Exemple #2
0
static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
				       struct intel_crtc_state *pipe_config,
				       struct drm_connector_state *conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
	struct intel_dp *intel_dp = &intel_mst->primary->dp;
	struct intel_connector *connector =
		to_intel_connector(conn_state->connector);
	struct intel_digital_connector_state *intel_conn_state =
		to_intel_digital_connector_state(conn_state);
	const struct drm_display_mode *adjusted_mode =
		&pipe_config->base.adjusted_mode;
	void *port = connector->port;
	struct link_config_limits limits;
	int ret;

	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return -EINVAL;

	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
	pipe_config->has_pch_encoder = false;

	if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
		pipe_config->has_audio =
			drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port);
	else
		pipe_config->has_audio =
			intel_conn_state->force_audio == HDMI_AUDIO_ON;

	/*
	 * for MST we always configure max link bw - the spec doesn't
	 * seem to suggest we should do otherwise.
	 */
	limits.min_clock =
	limits.max_clock = intel_dp_max_link_rate(intel_dp);

	limits.min_lane_count =
	limits.max_lane_count = intel_dp_max_lane_count(intel_dp);

	limits.min_bpp = intel_dp_min_bpp(pipe_config);
	limits.max_bpp = pipe_config->pipe_bpp;

	intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);

	ret = intel_dp_mst_compute_link_config(encoder, pipe_config,
					       conn_state, &limits);
	if (ret)
		return ret;

	pipe_config->limited_color_range =
		intel_dp_limited_color_range(pipe_config, conn_state);

	if (IS_GEN9_LP(dev_priv))
		pipe_config->lane_lat_optim_mask =
			bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);

	intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);

	return 0;
}
Exemple #3
0
static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
					struct intel_crtc_state *pipe_config,
					struct drm_connector_state *conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	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 intel_connector *connector =
		to_intel_connector(conn_state->connector);
	struct drm_atomic_state *state = pipe_config->base.state;
	int bpp;
	int lane_count, slots;
	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	int mst_pbn;
	bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
					   DP_DPCD_QUIRK_LIMITED_M_N);

	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return false;

	pipe_config->has_pch_encoder = false;
	bpp = 24;
	if (intel_dp->compliance.test_data.bpc) {
		bpp = intel_dp->compliance.test_data.bpc * 3;
		DRM_DEBUG_KMS("Setting pipe bpp to %d\n",
			      bpp);
	}
	/*
	 * for MST we always configure max link bw - the spec doesn't
	 * seem to suggest we should do otherwise.
	 */
	lane_count = intel_dp_max_lane_count(intel_dp);

	pipe_config->lane_count = lane_count;

	pipe_config->pipe_bpp = bpp;

	pipe_config->port_clock = intel_dp_max_link_rate(intel_dp);

	if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
		pipe_config->has_audio = true;

	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
	pipe_config->pbn = mst_pbn;

	slots = drm_dp_atomic_find_vcpi_slots(state, &intel_dp->mst_mgr,
					      connector->port, mst_pbn);
	if (slots < 0) {
		DRM_DEBUG_KMS("failed finding vcpi slots:%d\n", slots);
		return false;
	}

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

	pipe_config->dp_m_n.tu = slots;

	if (IS_GEN9_LP(dev_priv))
		pipe_config->lane_lat_optim_mask =
			bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);

	intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);

	return true;
}