[PATCH v2 1/4] Add support for API for drivers to set power saving policy

[Mario Limonciello]

---
 lib/igt_kms.c | 26 ++++++++++++++++++++++++++
 lib/igt_kms.h |  6 ++++++
 2 files changed, 32 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index af63d13b1..4ce5e4a95 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -6581,3 +6581,29 @@ int get_num_scalers(int drm_fd, enum pipe pipe)
 
 	return num_scalers;
 }
+
+static int toggle_power_saving_policy_prop(int drm_fd, igt_output_t *output, uint64_t policy)
+{
+	uint32_t type = DRM_MODE_OBJECT_CONNECTOR;
+	bool prop_exists;
+	uint32_t prop_id;
+
+	prop_exists = kmstest_get_property(
+		drm_fd, output->id, type, "power saving policy",
+		&prop_id, NULL, NULL);
+
+	if (!prop_exists)
+		return -ENODEV;
+
+	return drmModeObjectSetProperty(drm_fd, output->id, type, prop_id, policy);
+}
+
+int clear_power_saving_policy(int drm_fd, igt_output_t *output)
+{
+	return toggle_power_saving_policy_prop(drm_fd, output, 0);
+}
+
+int set_panel_power_saving_policy(int drm_fd, igt_output_t *output, uint64_t policy)
+{
+	return toggle_power_saving_policy_prop(drm_fd, output, policy);
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 01604dac9..129b88576 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -1223,4 +1223,10 @@ bool igt_check_output_is_dp_mst(igt_output_t *output);
 int igt_get_dp_mst_connector_id(igt_output_t *output);
 int get_num_scalers(int drm_fd, enum pipe pipe);
 
+#define DRM_MODE_REQUIRE_COLOR_ACCURACY	BIT(0)	/* Compositor requires color accuracy */
+#define DRM_MODE_REQUIRE_LOW_LATENCY	BIT(1)	/* Compositor requires low latency */
+
+int clear_power_saving_policy(int drm_fd, igt_output_t *output);
+int set_panel_power_saving_policy(int drm_fd, igt_output_t *output, uint64_t policy);
+
 #endif /* __IGT_KMS_H__ */
-- 
2.43.0