From 0096bf87b840b778f208f172922fdc8994ffa6dc Mon Sep 17 00:00:00 2001
From: Devin Bayer <dev@doubly.so>
Date: Sat, 10 Jul 2021 20:52:29 +0200
Subject: [PATCH] set "Broadcast RGB" = "Full" for all connections

---
 backend/drm/atomic.c             | 9 +++++++++
 backend/drm/properties.c         | 1 +
 include/backend/drm/properties.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/backend/drm/atomic.c b/backend/drm/atomic.c
index 35dca7d4d..0942c3925 100644
--- a/backend/drm/atomic.c
+++ b/backend/drm/atomic.c
@@ -7,6 +7,11 @@
 #include "backend/drm/iface.h"
 #include "backend/drm/util.h"
 
+// connection property "Broadcast RGB" = "Full"
+#ifndef DRM_MODE_COLOR_RANGE_FULL
+#define DRM_MODE_COLOR_RANGE_FULL 1
+#endif
+
 struct atomic {
 	drmModeAtomicReq *req;
 	bool failed;
@@ -220,6 +225,10 @@ static bool atomic_crtc_commit(struct wlr_drm_connector *conn,
 
 	struct atomic atom;
 	atomic_begin(&atom);
+	if (conn->props.broadcast_rgb) {
+		atomic_add(&atom, conn->id, conn->props.broadcast_rgb,
+			DRM_MODE_COLOR_RANGE_FULL);
+	}
 	atomic_add(&atom, conn->id, conn->props.crtc_id, active ? crtc->id : 0);
 	if (modeset && active && conn->props.link_status != 0) {
 		atomic_add(&atom, conn->id, conn->props.link_status,
diff --git a/backend/drm/properties.c b/backend/drm/properties.c
index 5581a130b..a9f3135ba 100644
--- a/backend/drm/properties.c
+++ b/backend/drm/properties.c
@@ -20,6 +20,7 @@ struct prop_info {
 
 static const struct prop_info connector_info[] = {
 #define INDEX(name) (offsetof(union wlr_drm_connector_props, name) / sizeof(uint32_t))
+	{ "Broadcast RGB", INDEX(broadcast_rgb) },
 	{ "CRTC_ID", INDEX(crtc_id) },
 	{ "DPMS", INDEX(dpms) },
 	{ "EDID", INDEX(edid) },
diff --git a/include/backend/drm/properties.h b/include/backend/drm/properties.h
index 9e1fe0b6e..16af69849 100644
--- a/include/backend/drm/properties.h
+++ b/include/backend/drm/properties.h
@@ -17,6 +17,7 @@ union wlr_drm_connector_props {
 		uint32_t link_status; // not guaranteed to exist
 		uint32_t path;
 		uint32_t vrr_capable; // not guaranteed to exist
+		uint32_t broadcast_rgb; // not guaranteed to exist
 		uint32_t subconnector; // not guaranteed to exist
 
 		// atomic-modesetting only