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[media] tvp5150: Fix breakage for serial usage

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changeset 460b6c0831 ("tvp5150: Add s_stream subdev operation
support") broke for em28xx-based devices with uses tvp5150. On those
devices, touching the TVP5150_MISC_CTL register causes em28xx to stop
streaming.

I suspect that it uses the 27 MHz clock provided by tvp5150 to feed
em28xx. So, change the logic to do nothing on s_stream if the tvp5150 is
not set up to work with V4L2_MBUS_PARALLEL.

Tested with Hauppauge WinTV USB 2 model 42012 Rev. C186
(USB ID: 2040:4200).

Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-01-25 14:39:34 -02:00
parent 27524ff8cd
commit 47de9bf893
1 changed files with 4 additions and 5 deletions
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9
drivers/media/i2c/tvp5150.c
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@ -975,19 +975,18 @@ static int tvp5150_g_mbus_config(struct v4l2_subdev *sd,
static int tvp5150_s_stream(struct v4l2_subdev *sd, int enable)
{
struct tvp5150 *decoder = to_tvp5150(sd);
/* Output format: 8-bit ITU-R BT.656 with embedded syncs */
int val = 0x09;
/* Output format: 8-bit 4:2:2 YUV with discrete sync */
if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
val = 0x0d;
if (decoder->mbus_type != V4L2_MBUS_PARALLEL)
return 0;
/* Initializes TVP5150 to its default values */
/* # set PCLK (27MHz) */
tvp5150_write(sd, TVP5150_CONF_SHARED_PIN, 0x00);
/* Output format: 8-bit ITU-R BT.656 with embedded syncs */
if (enable)
tvp5150_write(sd, TVP5150_MISC_CTL, val);
tvp5150_write(sd, TVP5150_MISC_CTL, 0x09);
else
tvp5150_write(sd, TVP5150_MISC_CTL, 0x00);