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[media] adv7842: support g_edid ioctl 

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Martin Bugge 2013-12-05 12:14:02 -03:00 committed by Mauro Carvalho Chehab
parent 6e9071f268
commit 245b2b678c
1 changed files with 41 additions and 0 deletions
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41
drivers/media/i2c/adv7842.c
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@ -1910,6 +1910,46 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
return 0;
}
static int adv7842_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_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;
if (!edid->edid)
return -EINVAL;
switch (edid->pad) {
case ADV7842_EDID_PORT_A:
case ADV7842_EDID_PORT_B:
if (state->hdmi_edid.present & (0x04 << edid->pad))
data = state->hdmi_edid.edid;
break;
case ADV7842_EDID_PORT_VGA:
if (state->vga_edid.present)
data = state->vga_edid.edid;
break;
default:
return -EINVAL;
}
if (!data)
return -ENODATA;
memcpy(edid->edid,
data + edid->start_block * 128,
edid->blocks * 128);
return 0;
}
static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *e)
{
struct adv7842_state *state = to_state(sd);
@ -2722,6 +2762,7 @@ static const struct v4l2_subdev_video_ops adv7842_video_ops = {
};
static const struct v4l2_subdev_pad_ops adv7842_pad_ops = {
.get_edid = adv7842_get_edid,
.set_edid = adv7842_set_edid,
};