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| author | Hung-Te Lin <hungte@chromium.org> | 2014-04-03 21:13:11 +0800 |
|---|---|---|
| committer | Mike Loptien <mike.loptien@se-eng.com> | 2014-10-07 23:48:06 +0200 |
| commit | 076c317d479b701af1b1561d0cd53ec1102016aa (patch) | |
| tree | 31d1e9a7bbef25a1ba1de0047c8430cdd63f5916 | |
| parent | 35382a6eeb6634c291ffb67a3c4fa7a4601a7328 (diff) | |
| download | coreboot-076c317d479b701af1b1561d0cd53ec1102016aa.tar.xz | |
edid: Relax EDID 1.3 requirements.
In E-EDID (EDID v1.3), Monitor Name (0xfc) and Monitor Range Limits (0xfd) are
always required. However, some panels do not really have these fields. As a
workaround (and since we don't really use these fields), we only print warning
messages for that case.
Change-Id: I81b1db7d7f6c6f9320a862608dec4c7be298d7db
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/193742
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit c633215ef8342664d9a4478e821fc8aad368b7f3)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/7009
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
| -rw-r--r-- | src/lib/edid.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/lib/edid.c b/src/lib/edid.c index 6efe6a95ba..c8e3203341 100644 --- a/src/lib/edid.c +++ b/src/lib/edid.c @@ -1272,12 +1272,22 @@ int decode_edid(unsigned char *edid, int size, struct edid *out) if (nonconformant_digital_display || !has_valid_string_termination || !has_valid_descriptor_pad || - !has_name_descriptor || - !has_preferred_timing || - !has_range_descriptor) + !has_preferred_timing) { conformant = 0; + } + /** + * According to E-EDID (EDIDv1.3), has_name_descriptor and + * has_range_descriptor are both required. These fields are + * optional in v1.4. However some v1.3 panels (Ex, B133XTN01.3) + * don't have them. As a workaround, we only print warning + * messages. + */ if (!conformant) printk(BIOS_ERR, "EDID block does NOT conform to EDID 1.3!\n"); + else if (!has_name_descriptor || !has_range_descriptor) + printk(BIOS_WARNING, "WARNING: EDID block does NOT " + "fully conform to EDID 1.3.\n"); + if (nonconformant_digital_display) printk(BIOS_ERR, "\tDigital display field contains garbage: %x\n", nonconformant_digital_display); |