[igt-dev] [PATCH i-g-t 4/5] lib/igt_edid: add support for Short Video Descriptors

[Simon Ser]

Short Video Descriptors (SVDs, not to be confused with Vendor-Specific Data
blocks) describe CEA video formats supported by the monitor.

Signed-off-by: Simon Ser <simon.ser at intel.com>
---
 lib/igt_edid.c | 8 ++++++++
 lib/igt_edid.h | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/lib/igt_edid.c b/lib/igt_edid.c
index 93202c138161..9a365dc40352 100644
--- a/lib/igt_edid.c
+++ b/lib/igt_edid.c
@@ -369,6 +369,14 @@ size_t edid_cea_data_block_set_sad(struct edid_cea_data_block *block,
 	return sizeof(struct edid_cea_data_block) + sads_size;
 }
 
+size_t edid_cea_data_block_set_svd(struct edid_cea_data_block *block,
+				   const uint8_t *svds, size_t svds_len)
+{
+	edid_cea_data_block_init(block, EDID_CEA_DATA_VIDEO, svds_len);
+	memcpy(block->data.svds, svds, svds_len);
+	return sizeof(struct edid_cea_data_block) + svds_len;
+}
+
 size_t edid_cea_data_block_set_vsd(struct edid_cea_data_block *block,
 				   const struct cea_vsd *vsd, size_t vsd_size)
 {
diff --git a/lib/igt_edid.h b/lib/igt_edid.h
index 702c14c54b5e..55bdf8a1037b 100644
--- a/lib/igt_edid.h
+++ b/lib/igt_edid.h
@@ -191,6 +191,9 @@ struct cea_sad {
 	uint8_t bitrate;
 } __attribute__((packed));
 
+/* Indicates that a Short Video Descriptor is native */
+#define CEA_SVD_NATIVE (1 << 7)
+
 enum hdmi_vsd_flags1 {
 	HDMI_VSD_DVI_DUAL = 1 << 0,
 	HDMI_VSD_DC_Y444 = 1 << 3, /* supports YCbCr 4:4:4 */
@@ -261,6 +264,7 @@ struct edid_cea_data_block {
 	uint8_t type_len; /* type is from enum edid_cea_data_type */
 	union {
 		struct cea_sad sads[0];
+		uint8_t svds[0]; /* Short Video Descriptors */
 		struct cea_vsd vsds[0];
 		struct cea_speaker_alloc speakers[0];
 	} data;
@@ -351,6 +355,8 @@ void edid_ext_update_cea_checksum(struct edid_ext *ext);
 const struct cea_vsd *cea_vsd_get_hdmi_default(size_t *size);
 size_t edid_cea_data_block_set_sad(struct edid_cea_data_block *block,
 				   const struct cea_sad *sads, size_t sads_len);
+size_t edid_cea_data_block_set_svd(struct edid_cea_data_block *block,
+				   const uint8_t *svds, size_t svds_len);
 size_t edid_cea_data_block_set_vsd(struct edid_cea_data_block *block,
 				   const struct cea_vsd *vsd, size_t vsd_size);
 size_t edid_cea_data_block_set_hdmi_vsd(struct edid_cea_data_block *block,
-- 
2.22.0