diff options
| author | Dave Airlie <airlied@redhat.com> | 2021-10-28 14:59:38 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2021-10-28 14:59:38 +1000 |
| commit | 970eae15600a883e4ad27dd0757b18871cc983ab (patch) | |
| tree | 7aeb639a35ca2ab8b54a5987837f8ac5f96ee5f4 /drivers/gpu/drm/drm_edid.c | |
| parent | 27f4432577e4f78bbdf15c104748cc738db8eead (diff) | |
| parent | 3906fe9bb7f1a2c8667ae54e967dc8690824f4ea (diff) | |
BackMerge tag 'v5.15-rc7' into drm-next
The msm next tree is based on rc3, so let's just backmerge rc7 before pulling it in.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 7aa2a56a71c8..12893e7be89b 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1846,11 +1846,20 @@ static void connector_bad_edid(struct drm_connector *connector, u8 *edid, int num_blocks) { int i; - u8 num_of_ext = edid[0x7e]; + u8 last_block; + + /* + * 0x7e in the EDID is the number of extension blocks. The EDID + * is 1 (base block) + num_ext_blocks big. That means we can think + * of 0x7e in the EDID of the _index_ of the last block in the + * combined chunk of memory. + */ + last_block = edid[0x7e]; /* Calculate real checksum for the last edid extension block data */ - connector->real_edid_checksum = - drm_edid_block_checksum(edid + num_of_ext * EDID_LENGTH); + if (last_block < num_blocks) + connector->real_edid_checksum = + drm_edid_block_checksum(edid + last_block * EDID_LENGTH); if (connector->bad_edid_counter++ && !drm_debug_enabled(DRM_UT_KMS)) return; |