[PATCH 4/7] drm/i915/display: Add handling for new "active color format" property

[Andri Yngvason]

From: Werner Sembach <wse at tuxedocomputers.com>

This commit implements the "active color format" drm property for the Intel
GPU driver.

Signed-off-by: Werner Sembach <wse at tuxedocomputers.com>
Signed-off-by: Andri Yngvason <andri at yngvason.is>
Tested-by: Andri Yngvason <andri at yngvason.is>
---
 drivers/gpu/drm/i915/display/intel_display.c | 33 ++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.c      |  7 +++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c  |  5 +++
 drivers/gpu/drm/i915/display/intel_hdmi.c    |  4 ++-
 4 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index df582ff81b45f..79cc258db8f09 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7167,6 +7167,21 @@ static void intel_atomic_prepare_plane_clear_colors(struct intel_atomic_state *s
 	}
 }
 
+static int convert_intel_output_format_into_drm_color_format(enum intel_output_format output_format)
+{
+	switch (output_format) {
+	case INTEL_OUTPUT_FORMAT_RGB:
+		return DRM_COLOR_FORMAT_RGB444;
+	case INTEL_OUTPUT_FORMAT_YCBCR420:
+		return DRM_COLOR_FORMAT_YCBCR420;
+	case INTEL_OUTPUT_FORMAT_YCBCR444:
+		return DRM_COLOR_FORMAT_YCBCR444;
+	default:
+		break;
+	}
+	return 0;
+}
+
 static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 {
 	struct drm_device *dev = state->base.dev;
@@ -7438,6 +7453,9 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
 {
 	struct intel_atomic_state *state = to_intel_atomic_state(_state);
 	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_connector *connector;
+	struct drm_connector_state *new_conn_state;
+	int i;
 	int ret = 0;
 
 	state->wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
@@ -7506,6 +7524,21 @@ int intel_atomic_commit(struct drm_device *dev, struct drm_atomic_state *_state,
 	intel_shared_dpll_swap_state(state);
 	intel_atomic_track_fbs(state);
 
+	/* Extract information from crtc to communicate it to userspace as connector properties */
+	for_each_new_connector_in_state(&state->base, connector, new_conn_state, i) {
+		struct intel_crtc *crtc = to_intel_crtc(new_conn_state->crtc);
+
+		if (crtc) {
+			struct intel_crtc_state *new_crtc_state =
+				intel_atomic_get_new_crtc_state(state, crtc);
+
+			drm_connector_set_active_color_format_property(connector,
+				convert_intel_output_format_into_drm_color_format(
+					new_crtc_state->output_format));
+		} else
+			drm_connector_set_active_color_format_property(connector, 0);
+	}
+
 	drm_atomic_state_get(&state->base);
 	INIT_WORK(&state->base.commit_work, intel_atomic_commit_work);
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 62ce92772367f..c40fe8a847614 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5910,10 +5910,13 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
 		intel_attach_force_audio_property(connector);
 
 	intel_attach_broadcast_rgb_property(connector);
-	if (HAS_GMCH(dev_priv))
+	if (HAS_GMCH(dev_priv)) {
 		drm_connector_attach_max_bpc_property(connector, 6, 10);
-	else if (DISPLAY_VER(dev_priv) >= 5)
+		drm_connector_attach_active_color_format_property(connector);
+	} else if (DISPLAY_VER(dev_priv) >= 5) {
 		drm_connector_attach_max_bpc_property(connector, 6, 12);
+		drm_connector_attach_active_color_format_property(connector);
+	}
 
 	/* Register HDMI colorspace for case of lspcon */
 	if (intel_bios_encoder_is_lspcon(dp_to_dig_port(intel_dp)->base.devdata)) {
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index aa10612626136..e7574ca0604e6 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -1210,6 +1210,11 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 		drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP MST init failed, skipping.\n",
 			    connector->name, connector->base.id);
 
+	connector->active_color_format_property =
+		intel_dp->attached_connector->base.active_color_format_property;
+	if (connector->active_color_format_property)
+		drm_connector_attach_active_color_format_property(connector);
+
 	return connector;
 
 err:
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index bfa456fa7d25c..ce0221f90de92 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2611,8 +2611,10 @@ intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *c
 	if (DISPLAY_VER(dev_priv) >= 10)
 		drm_connector_attach_hdr_output_metadata_property(connector);
 
-	if (!HAS_GMCH(dev_priv))
+	if (!HAS_GMCH(dev_priv)) {
 		drm_connector_attach_max_bpc_property(connector, 8, 12);
+		drm_connector_attach_active_color_format_property(connector);
+	}
 }
 
 /*
-- 
2.43.0