[v8 08/10] drm/i915:Enabled Modeset when HDR Infoframe changes

[Uma Shankar]

This patch enables modeset whenever HDR metadata
needs to be updated to sink.

v2: Addressed Shashank's review comments.

v3: Added Shashank's RB.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Uma Shankar <uma.shankar at intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma at intel.com>
---
 drivers/gpu/drm/i915/intel_atomic.c | 14 +++++++++++++-
 drivers/gpu/drm/i915/intel_hdmi.c   | 26 ++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 8c8fae3..e8b5f84 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -104,6 +104,16 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
 	return -EINVAL;
 }
 
+static bool blob_equal(const struct drm_property_blob *a,
+		       const struct drm_property_blob *b)
+{
+	if (a && b)
+		return a->length == b->length &&
+			!memcmp(a->data, b->data, a->length);
+
+	return !a == !b;
+}
+
 int intel_digital_connector_atomic_check(struct drm_connector *conn,
 					 struct drm_connector_state *new_state)
 {
@@ -131,7 +141,9 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
 	    new_conn_state->base.colorspace != old_conn_state->base.colorspace ||
 	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
 	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
-	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
+	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
+	    !blob_equal(new_conn_state->base.hdr_output_metadata_blob_ptr,
+			old_conn_state->base.hdr_output_metadata_blob_ptr))
 		crtc_state->mode_changed = true;
 
 	return 0;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 0ecfda0..85333a7 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -799,6 +799,20 @@ void intel_read_infoframe(struct intel_encoder *encoder,
 	return true;
 }
 
+static bool is_eotf_supported(u8 output_eotf, u8 sink_eotf)
+{
+	if (output_eotf == 0)
+		return (sink_eotf & (1 << 0));
+	if (output_eotf == 1)
+		return (sink_eotf & (1 << 1));
+	if (output_eotf == 2)
+		return (sink_eotf & (1 << 2));
+	if (output_eotf == 3)
+		return (sink_eotf & (1 << 3));
+
+	return false;
+}
+
 static bool
 intel_hdmi_compute_drm_infoframe(struct intel_encoder *encoder,
 				 struct intel_crtc_state *crtc_state,
@@ -806,11 +820,23 @@ void intel_read_infoframe(struct intel_encoder *encoder,
 {
 	struct hdmi_drm_infoframe *frame = &crtc_state->infoframes.drm.drm;
 	struct hdr_output_metadata *hdr_metadata;
+	struct drm_connector *connector = conn_state->connector;
 	int ret;
 
+	if (!conn_state->hdr_output_metadata_blob_ptr ||
+	    conn_state->hdr_output_metadata_blob_ptr->length == 0)
+		return true;
+
 	hdr_metadata = (struct hdr_output_metadata *)
 			conn_state->hdr_output_metadata_blob_ptr->data;
 
+	/* Sink EOTF is Bit map while infoframe is absolute values */
+	if (!is_eotf_supported(hdr_metadata->hdmi_metadata_type1.eotf,
+			       connector->hdr_sink_metadata.hdmi_type1.eotf)) {
+		DRM_ERROR("EOTF Not Supported\n");
+		return true;
+	}
+
 	ret = drm_hdmi_infoframe_set_hdr_metadata(frame, hdr_metadata);
 	if (ret < 0) {
 		DRM_ERROR("couldn't set HDR metadata in infoframe\n");
-- 
1.9.1