diff options
| author | Jernej Skrabec | 2021-04-22 01:14:29 +0100 |
|---|---|---|
| committer | Anatolij Gustschin | 2021-04-24 13:44:47 +0200 |
| commit | a327feeef44108000c171ea2d74f4ab33c09bad7 (patch) | |
| tree | 4d60d4907f9e34d24fd42805954b651f4289a2b4 /common | |
| parent | 3daea8632cabeb2f9c850743e4920472f898c6f8 (diff) | |
common: edid: Search for valid timing in extension block
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>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Diffstat (limited to 'common')
| -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 a6c875d9c8e..fa85bcd6a15 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; |