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authorChristian Schmidt <schmidt@digadd.de>2011-12-19 20:03:38 +0100
committerDave Airlie <airlied@redhat.com>2011-12-20 09:51:06 +0000
commita0ab734d62ef4c35ffa5e39f9ec1e6d6284f05fa (patch)
treef543a4b51b76585d2befd5552a7265955d3b9b58 /drivers
parent54ac76f851a1789b047b74a8e14980f2dd1ac749 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/drm_edid.c41
1 files changed, 22 insertions, 19 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 2283631c9a5..478b122ad1b 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;