diff options
| author | Christian Schmidt <schmidt@digadd.de> | 2011-12-19 23:03:38 +0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-12-20 13:51:06 +0400 |
| commit | a0ab734d62ef4c35ffa5e39f9ec1e6d6284f05fa (patch) | |
| tree | f543a4b51b76585d2befd5552a7265955d3b9b58 | |
| parent | 54ac76f851a1789b047b74a8e14980f2dd1ac749 (diff) | |
| download | linux-a0ab734d62ef4c35ffa5e39f9ec1e6d6284f05fa.tar.xz | |
drm_edid_to_eld: check for CEA data blocks only from structure revision 3 on
CEA datablocks are only defined from revision 3 onwards. Only check for
them if the revision says so.
Signed-of-by: Christian Schmidt <schmidt@digadd.de>
Tested-by: James Cloos <cloos@jhcloos.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 2283631c9a51..478b122ad1ba 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1474,26 +1474,29 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) eld[18] = edid->prod_code[0]; eld[19] = edid->prod_code[1]; - for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { - dbl = db[0] & 0x1f; - - switch ((db[0] & 0xe0) >> 5) { - case AUDIO_BLOCK: /* Audio Data Block, contains SADs */ - sad_count = dbl / 3; - memcpy(eld + 20 + mnl, &db[1], dbl); - break; - case SPEAKER_BLOCK: /* Speaker Allocation Data Block */ - eld[7] = db[1]; - break; - case VENDOR_BLOCK: - /* HDMI Vendor-Specific Data Block */ - if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0) - parse_hdmi_vsdb(connector, db); - break; - default: - break; + if (cea[1] >= 3) + for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { + dbl = db[0] & 0x1f; + + switch ((db[0] & 0xe0) >> 5) { + case AUDIO_BLOCK: + /* Audio Data Block, contains SADs */ + sad_count = dbl / 3; + memcpy(eld + 20 + mnl, &db[1], dbl); + break; + case SPEAKER_BLOCK: + /* Speaker Allocation Data Block */ + eld[7] = db[1]; + break; + case VENDOR_BLOCK: + /* HDMI Vendor-Specific Data Block */ + if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0) + parse_hdmi_vsdb(connector, db); + break; + default: + break; + } } - } eld[5] |= sad_count << 4; eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; |