diff mbox series

[v3,5/7] drm/i915/display: Enable BT2020 for HDR on LSPCON devices

Message ID 20200327073140.11568-6-vipin.anand@intel.com (mailing list archive)
State New, archived
Headers show
Series Enable HDR on Gen9 devices with lspcon hdr capability | expand

Commit Message

Vipin Anand March 27, 2020, 7:31 a.m. UTC 
From: Uma Shankar <uma.shankar@intel.com>

Enable Colorspace as BT2020 if driving HDR content.Sending Colorimetry
data for HDR using AVI infoframe. LSPCON firmware expects this and though
SOC drives DP, for HDMI panel AVI infoframe is sent to the LSPCON device
which transfers the same to HDMI sink.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Vipin Anand <vipin.anand@intel.com>
---
 drivers/gpu/drm/i915/display/intel_lspcon.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 4d8027493f2c..5cede4f07f22 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -506,6 +506,11 @@  void lspcon_read_infoframe(struct intel_encoder *encoder,
 	/* FIXME implement this */
 }
 
+/* HDMI HDR Colorspace Spec Definitions */
+#define NORMAL_COLORIMETRY_MASK		0x3
+#define EXTENDED_COLORIMETRY_MASK	0x7
+#define HDMI_COLORIMETRY_BT2020_YCC	((3 << 0) | (6 << 2) | (0 << 5))
+
 void lspcon_set_infoframes(struct intel_encoder *encoder,
 			   bool enable,
 			   const struct intel_crtc_state *crtc_state,
@@ -550,6 +555,19 @@  void lspcon_set_infoframes(struct intel_encoder *encoder,
 					   HDMI_QUANTIZATION_RANGE_LIMITED :
 					   HDMI_QUANTIZATION_RANGE_FULL);
 
+	/*
+	 * Set BT2020 colorspace if driving HDR data
+	 * ToDo: Make this generic and expose all colorspaces for lspcon
+	 */
+	if (lspcon->active && conn_state->hdr_metadata_changed) {
+		frame.avi.colorimetry =
+				HDMI_COLORIMETRY_BT2020_YCC &
+				NORMAL_COLORIMETRY_MASK;
+		frame.avi.extended_colorimetry =
+				(HDMI_COLORIMETRY_BT2020_YCC >> 2) &
+				 EXTENDED_COLORIMETRY_MASK;
+	}
+
 	ret = hdmi_infoframe_pack(&frame, buf, sizeof(buf));
 	if (ret < 0) {
 		DRM_ERROR("Failed to pack AVI IF\n");