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[media] adv7511: fix G/S_EDID behavior 

This fixes the v4l2-compliance failures.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-11-07 09:34:56 -03:00 committed by Mauro Carvalho Chehab
parent c909e5ba6b
commit c81285ae47
1 changed files with 14 additions and 7 deletions
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21
drivers/media/i2c/adv7511.c
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@ -779,21 +779,28 @@ static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
{
struct adv7511_state *state = get_adv7511_state(sd);
memset(edid->reserved, 0, sizeof(edid->reserved));
if (edid->pad != 0)
return -EINVAL;
if ((edid->blocks == 0) || (edid->blocks > 256))
return -EINVAL;
if (!state->edid.segments) {
v4l2_dbg(1, debug, sd, "EDID segment 0 not found\n");
return -ENODATA;
if (edid->start_block == 0 && edid->blocks == 0) {
edid->blocks = state->edid.segments * 2;
return 0;
}
if (state->edid.segments == 0)
return -ENODATA;
if (edid->start_block >= state->edid.segments * 2)
return -E2BIG;
if ((edid->blocks + edid->start_block) >= state->edid.segments * 2)
return -EINVAL;
if (edid->start_block + edid->blocks > state->edid.segments * 2)
edid->blocks = state->edid.segments * 2 - edid->start_block;
memcpy(edid->edid, &state->edid.data[edid->start_block * 128],
128 * edid->blocks);
return 0;
}