[Intel-gfx] [PATCH 1/5] drm/i915: Add broadcast RGB property for DP MST

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add the "Broadcast RGB" property to MST connectors, and implement
the same logic for it as we have in the SST code.

Cc: Ivan Vlk <ari at adyline.sk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108821
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_dp_mst.c | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index fb67cd931117..2b791d67a43f 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -38,6 +38,8 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 	struct intel_digital_port *intel_dig_port = intel_mst->primary;
 	struct intel_dp *intel_dp = &intel_dig_port->dp;
 	struct drm_connector *connector = conn_state->connector;
+	struct intel_digital_connector_state *intel_conn_state =
+		to_intel_digital_connector_state(conn_state);
 	void *port = to_intel_connector(connector)->port;
 	struct drm_atomic_state *state = pipe_config->base.state;
 	struct drm_crtc *crtc = pipe_config->base.crtc;
@@ -77,6 +79,21 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 	if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, port))
 		pipe_config->has_audio = true;
 
+	if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
+		/*
+		 * See:
+		 * CEA-861-E - 5.1 Default Encoding Parameters
+		 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
+		 */
+		pipe_config->limited_color_range =
+			pipe_config->pipe_bpp != 18 &&
+			drm_default_rgb_quant_range(adjusted_mode) ==
+			HDMI_QUANTIZATION_RANGE_LIMITED;
+	} else {
+		pipe_config->limited_color_range =
+			intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_LIMITED;
+	}
+
 	mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
 	pipe_config->pbn = mst_pbn;
 
@@ -117,7 +134,11 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
 	struct drm_crtc *new_crtc = new_conn_state->crtc;
 	struct drm_crtc_state *crtc_state;
 	struct drm_dp_mst_topology_mgr *mgr;
-	int ret = 0;
+	int ret;
+
+	ret = intel_digital_connector_atomic_check(connector, new_conn_state);
+	if (ret)
+		return ret;
 
 	if (!old_conn_state->crtc)
 		return 0;
@@ -354,11 +375,13 @@ intel_dp_mst_detect(struct drm_connector *connector, bool force)
 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 	.detect = intel_dp_mst_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
+	.atomic_get_property = intel_digital_connector_atomic_get_property,
+	.atomic_set_property = intel_digital_connector_atomic_set_property,
 	.late_register = intel_connector_register,
 	.early_unregister = intel_connector_unregister,
 	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
 };
 
 static int intel_dp_mst_get_modes(struct drm_connector *connector)
@@ -487,6 +510,8 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 	if (ret)
 		goto err;
 
+	intel_attach_broadcast_rgb_property(connector);
+
 	return connector;
 
 err:
-- 
2.19.2