[PATCH 4/7] drm/i915/display: Set HDR Infoframe for HDR capable LSPCON devices

[Vipin Anand]

From: Uma Shankar <uma.shankar at intel.com>

Send Dynamic Range and Mastering Infoframe (DRM for HDR metadata)
as SDP packet to LSPCON following the DP spec. LSPCON receives the
same and sends it to HDMI sink.

v2: Suppressed some warnings. No functional change.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/drm_atomic_state_helper.c   | 1 +
 drivers/gpu/drm/drm_atomic_uapi.c           | 1 +
 drivers/gpu/drm/i915/display/intel_lspcon.h | 1 +
 include/drm/drm_connector.h                 | 1 +
 4 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 7cf3cf936547..7cf98c06f424 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -468,6 +468,7 @@ __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
 
 	if (state->hdr_output_metadata)
 		drm_property_blob_get(state->hdr_output_metadata);
+	state->hdr_metadata_changed = false;
 
 	/* Don't copy over a writeback job, they are used only once */
 	state->writeback_job = NULL;
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index a1e5e262bae2..4c520e0b9872 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -734,6 +734,7 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
 				val,
 				sizeof(struct hdr_output_metadata), -1,
 				&replaced);
+		state->hdr_metadata_changed |= replaced;
 		return ret;
 	} else if (property == config->aspect_ratio_property) {
 		state->picture_aspect_ratio = val;
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.h b/drivers/gpu/drm/i915/display/intel_lspcon.h
index b2051f236223..bc34124f532e 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.h
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.h
@@ -38,4 +38,5 @@ void lspcon_drm_write_infoframe(struct intel_encoder *encoder,
 				const struct intel_crtc_state *crtc_state,
 				unsigned int type,
 				const void *frame, ssize_t len);
+
 #endif /* __INTEL_LSPCON_H__ */
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 221910948b37..28df268aa1a7 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -661,6 +661,7 @@ struct drm_connector_state {
 	 * DRM blob property for HDR output metadata
 	 */
 	struct drm_property_blob *hdr_output_metadata;
+	u8 hdr_metadata_changed : 1;
 };
 
 /**
-- 
2.26.0