@@ -220,6 +220,24 @@ int edid_get_timing_validate(u8 *buf, int buf_size,
/* Look for detailed timing in base EDID */
found = edid_find_valid_timing(edid->monitor_details.descriptor, 4,
timing, mode_valid, mode_valid_priv);
+
+ /* Look for detailed timing in CTA-861 Extension Block */
+ if (!found && edid->extension_flag && buf_size >= EDID_EXT_SIZE) {
+ struct edid_cea861_info *info =
+ (struct edid_cea861_info *)(buf + sizeof(*edid));
+
+ if (info->extension_tag == EDID_CEA861_EXTENSION_TAG) {
+ int count = EDID_CEA861_DTD_COUNT(*info);
+ int offset = info->dtd_offset;
+ int size = count * sizeof(struct edid_detailed_timing);
+
+ if (offset >= 4 && offset + size < EDID_SIZE)
+ found = edid_find_valid_timing(
+ (u8*)info + offset, count, timing,
+ mode_valid, mode_valid_priv);
+ }
+ }
+
if (!found)
return -EINVAL;
One of my monitors have only 4k@60 timing in base EDID block which is out of range for devices with HDMI 1.4. It turns out that it has additional detailed timings in CTA-861 Extension Block and two of them are appropriate for HDMI 1.4. Add additional search for valid detailed timing in extension block. Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> --- common/edid.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)