diff options
| -rw-r--r-- | common/edid.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/common/edid.c b/common/edid.c index a6c875d9c8..fa85bcd6a1 100644 --- a/common/edid.c +++ b/common/edid.c @@ -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; |