[PATCH i-g-t 1/2] tests/kms_feature_discovery: add HDR, VRR and DSC discovery

[Swati Sharma <swati2.sharma@intel.com>]

Add display feature discovery subtests for HDR, VRR and DSC.

HDR requires:
- IGT_CONNECTOR_MAX_BPC with max bpc >= 10
- IGT_CONNECTOR_HDR_OUTPUT_METADATA
- EDID HDR capability via igt_is_panel_hdr()

VRR checks connector vrr_capable support.
DSC checks sink support via igt_is_dsc_supported_by_sink().

v2:
- Rebase

Assisted-by: GitHub Copilot:Claude Opus 4.6
Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
---
 tests/kms_feature_discovery.c | 77 +++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/tests/kms_feature_discovery.c b/tests/kms_feature_discovery.c
index 28ec89c55..4ad2e6a74 100644
--- a/tests/kms_feature_discovery.c
+++ b/tests/kms_feature_discovery.c
@@ -36,6 +36,7 @@
 #ifdef HAVE_CHAMELIUM
 #include "igt_chamelium.h"
 #endif
+#include "igt_hdr.h"
 #include "igt_kms.h"
 #include "igt_psr.h"
 #include "igt_sysfs.h"
@@ -63,6 +64,18 @@
  * SUBTEST: dp-mst
  * Description: Make sure that we have DP-MST configuration.
  *
+ * SUBTEST: hdr
+ * Description: Make sure that we have at least one HDR-capable panel.
+ * Mega feature: HDR
+ *
+ * SUBTEST: vrr
+ * Description: Make sure that we have at least one VRR-capable panel.
+ * Mega feature: VRR
+ *
+ * SUBTEST: dsc
+ * Description: Make sure that we have at least one DSC-capable sink.
+ * Mega feature: DSC
+ *
  * arg[1].values: 1, 2, 3, 4
  */
 
@@ -174,5 +187,69 @@ int igt_main() {
 			}
 			igt_require_f(ret == 0, "No DP-MST configuration found.\n");
 		}
+
+		igt_describe("Make sure that we have at least one HDR-capable panel.");
+		igt_subtest("hdr") {
+			igt_output_t *output;
+			unsigned int max_bpc;
+			bool found = false;
+
+			for_each_connected_output(&display, output) {
+				if (!igt_output_has_prop(output, IGT_CONNECTOR_MAX_BPC))
+					continue;
+
+				if (!igt_get_output_max_bpc(output, &max_bpc) ||
+				    max_bpc < 10)
+					continue;
+
+				if (!igt_output_has_prop(output,
+							 IGT_CONNECTOR_HDR_OUTPUT_METADATA))
+					continue;
+
+				if (!igt_is_panel_hdr(fd, output))
+					continue;
+
+				found = true;
+				break;
+			}
+
+			igt_require_f(found,
+				      "No HDR-capable panel found with max bpc, HDR metadata, and EDID HDR support.\n");
+		}
+
+		igt_describe("Make sure that we have at least one VRR-capable panel.");
+		igt_subtest("vrr") {
+			igt_output_t *output;
+			bool found = false;
+
+			for_each_connected_output(&display, output) {
+				if (!igt_output_has_prop(output, IGT_CONNECTOR_VRR_CAPABLE))
+					continue;
+
+				if (!igt_output_get_prop(output, IGT_CONNECTOR_VRR_CAPABLE))
+					continue;
+
+				found = true;
+				break;
+			}
+
+			igt_require_f(found, "No VRR-capable panel found.\n");
+		}
+
+		igt_describe("Make sure that we have at least one DSC-capable sink.");
+		igt_subtest("dsc") {
+			igt_output_t *output;
+			bool found = false;
+
+			for_each_connected_output(&display, output) {
+				if (!igt_is_dsc_supported_by_sink(fd, output->name))
+					continue;
+
+				found = true;
+				break;
+			}
+
+			igt_require_f(found, "No DSC-capable sink found.\n");
+		}
 	}
 }
-- 
2.25.1