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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>
This commit is contained in:
Christian Schmidt 2011-12-19 20:03:38 +01:00 committed by Dave Airlie
parent 54ac76f851
commit a0ab734d62
1 changed files with 22 additions and 19 deletions
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41
drivers/gpu/drm/drm_edid.c
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@ -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;