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[media] tvp514x: s_routing should just change routing, not try to detect a signal 

The s_routing function should not try to detect a signal. It is a really
bad idea to try to detect a valid video signal and return an error if
you can't. Changing input should do just that and nothing more.
Also don't power on the ADCs on s_routing, instead do that on querystd.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Tested-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-09-20 09:06:33 -03:00 committed by Mauro Carvalho Chehab
parent 0d4f35f3f0
commit c389648a92
1 changed files with 6 additions and 71 deletions
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77
drivers/media/i2c/tvp514x.c
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@ -519,6 +519,12 @@ static int tvp514x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std_id)
*std_id = V4L2_STD_UNKNOWN;
/* To query the standard the TVP514x must power on the ADCs. */
if (!decoder->streaming) {
tvp514x_s_stream(sd, 1);
msleep(LOCK_RETRY_DELAY);
}
/* query the current standard */
current_std = tvp514x_query_current_std(sd);
if (current_std == STD_INVALID)
@ -625,25 +631,12 @@ static int tvp514x_s_routing(struct v4l2_subdev *sd,
int err;
enum tvp514x_input input_sel;
enum tvp514x_output output_sel;
u8 sync_lock_status, lock_mask;
int try_count = LOCK_RETRY_COUNT;
if ((input >= INPUT_INVALID) ||
(output >= OUTPUT_INVALID))
/* Index out of bound */
return -EINVAL;
/*
* For the sequence streamon -> streamoff and again s_input
* it fails to lock the signal, since streamoff puts TVP514x
* into power off state which leads to failure in sub-sequent s_input.
*
* So power up the TVP514x device here, since it is important to lock
* the signal at this stage.
*/
if (!decoder->streaming)
tvp514x_s_stream(sd, 1);
input_sel = input;
output_sel = output;
@ -660,64 +653,6 @@ static int tvp514x_s_routing(struct v4l2_subdev *sd,
decoder->tvp514x_regs[REG_INPUT_SEL].val = input_sel;
decoder->tvp514x_regs[REG_OUTPUT_FORMATTER1].val = output_sel;
/* Clear status */
msleep(LOCK_RETRY_DELAY);
err =
tvp514x_write_reg(sd, REG_CLEAR_LOST_LOCK, 0x01);
if (err)
return err;
switch (input_sel) {
case INPUT_CVBS_VI1A:
case INPUT_CVBS_VI1B:
case INPUT_CVBS_VI1C:
case INPUT_CVBS_VI2A:
case INPUT_CVBS_VI2B:
case INPUT_CVBS_VI2C:
case INPUT_CVBS_VI3A:
case INPUT_CVBS_VI3B:
case INPUT_CVBS_VI3C:
case INPUT_CVBS_VI4A:
lock_mask = STATUS_CLR_SUBCAR_LOCK_BIT |
STATUS_HORZ_SYNC_LOCK_BIT |
STATUS_VIRT_SYNC_LOCK_BIT;
break;
case INPUT_SVIDEO_VI2A_VI1A:
case INPUT_SVIDEO_VI2B_VI1B:
case INPUT_SVIDEO_VI2C_VI1C:
case INPUT_SVIDEO_VI2A_VI3A:
case INPUT_SVIDEO_VI2B_VI3B:
case INPUT_SVIDEO_VI2C_VI3C:
case INPUT_SVIDEO_VI4A_VI1A:
case INPUT_SVIDEO_VI4A_VI1B:
case INPUT_SVIDEO_VI4A_VI1C:
case INPUT_SVIDEO_VI4A_VI3A:
case INPUT_SVIDEO_VI4A_VI3B:
case INPUT_SVIDEO_VI4A_VI3C:
lock_mask = STATUS_HORZ_SYNC_LOCK_BIT |
STATUS_VIRT_SYNC_LOCK_BIT;
break;
/* Need to add other interfaces*/
default:
return -EINVAL;
}
while (try_count-- > 0) {
/* Allow decoder to sync up with new input */
msleep(LOCK_RETRY_DELAY);
sync_lock_status = tvp514x_read_reg(sd,
REG_STATUS1);
if (lock_mask == (sync_lock_status & lock_mask))
/* Input detected */
break;
}
if (try_count < 0)
return -EINVAL;
decoder->input = input;
decoder->output = output;