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[media] adv7842: fix G/S_EDID behavior 

Make this pass the v4l2-compliance test.

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 09:34:55 -03:00 committed by Mauro Carvalho Chehab
parent 47efeb52f7
commit c909e5ba6b
1 changed files with 20 additions and 14 deletions
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34
drivers/media/i2c/adv7842.c
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@ -2028,16 +2028,7 @@ static int adv7842_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
struct adv7842_state *state = to_state(sd);
u8 *data = NULL;
if (edid->pad > ADV7842_EDID_PORT_VGA)
return -EINVAL;
if (edid->blocks == 0)
return -EINVAL;
if (edid->blocks > 2)
return -EINVAL;
if (edid->start_block > 1)
return -EINVAL;
if (edid->start_block == 1)
edid->blocks = 1;
memset(edid->reserved, 0, sizeof(edid->reserved));
switch (edid->pad) {
case ADV7842_EDID_PORT_A:
@ -2052,12 +2043,23 @@ static int adv7842_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
default:
return -EINVAL;
}
if (edid->start_block == 0 && edid->blocks == 0) {
edid->blocks = data ? 2 : 0;
return 0;
}
if (!data)
return -ENODATA;
memcpy(edid->edid,
data + edid->start_block * 128,
edid->blocks * 128);
if (edid->start_block >= 2)
return -EINVAL;
if (edid->start_block + edid->blocks > 2)
edid->blocks = 2 - edid->start_block;
memcpy(edid->edid, data + edid->start_block * 128, edid->blocks * 128);
return 0;
}
@ -2066,12 +2068,16 @@ static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *e)
struct adv7842_state *state = to_state(sd);
int err = 0;
memset(e->reserved, 0, sizeof(e->reserved));
if (e->pad > ADV7842_EDID_PORT_VGA)
return -EINVAL;
if (e->start_block != 0)
return -EINVAL;
if (e->blocks > 2)
if (e->blocks > 2) {
e->blocks = 2;
return -E2BIG;
}
/* todo, per edid */
state->aspect_ratio = v4l2_calc_aspect_ratio(e->edid[0x15],