lkml.org 
[lkml]   [2017]   [Jan]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.9 46/66] [media] v4l: tvp5150: Dont override output pinmuxing at stream on/off time
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

commit 79d6205a3f741c9fb89cfc47dfa0eddb1526726d upstream.

The s_stream() handler incorrectly writes the whole MISC_CTL register to
enable or disable the outputs, overriding the output pinmuxing
configuration. Fix it to only touch the output enable bits.

The CONF_SHARED_PIN register is also written by the same function,
resulting in muxing the INTREQ signal instead of the VBLK/GPCL signal on
the INTREQ/GPCL/VBLK pin. As the driver doesn't support interrupts this
is obviously incorrect, and breaks operation on other devices. Fix it by
removing the write.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/media/i2c/tvp5150.c | 31 ++++++++++++++++++-------------
1 file changed, 18 insertions(+), 13 deletions(-)

--- a/drivers/media/i2c/tvp5150.c
+++ b/drivers/media/i2c/tvp5150.c
@@ -1055,22 +1055,27 @@ static const struct media_entity_operati
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 = TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_CLOCK_OE;
+ int val;

- /* Output format: 8-bit 4:2:2 YUV with discrete sync */
- if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
- val = TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_SYNC_OE
- | TVP5150_MISC_CTL_CLOCK_OE;
+ /* Enable or disable the video output signals. */
+ val = tvp5150_read(sd, TVP5150_MISC_CTL);
+ if (val < 0)
+ return val;

- /* Initializes TVP5150 to its default values */
- /* # set PCLK (27MHz) */
- tvp5150_write(sd, TVP5150_CONF_SHARED_PIN, 0x00);
+ val &= ~(TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_SYNC_OE |
+ TVP5150_MISC_CTL_CLOCK_OE);

- if (enable)
- tvp5150_write(sd, TVP5150_MISC_CTL, val);
- else
- tvp5150_write(sd, TVP5150_MISC_CTL, 0x00);
+ if (enable) {
+ /*
+ * Enable the YCbCr and clock outputs. In discrete sync mode
+ * (non-BT.656) additionally enable the the sync outputs.
+ */
+ val |= TVP5150_MISC_CTL_YCBCR_OE | TVP5150_MISC_CTL_CLOCK_OE;
+ if (decoder->mbus_type == V4L2_MBUS_PARALLEL)
+ val |= TVP5150_MISC_CTL_SYNC_OE;
+ }
+
+ tvp5150_write(sd, TVP5150_MISC_CTL, val);

return 0;
}

\
 
 \ /
  Last update: 2017-01-31 06:55    [W:1.092 / U:0.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site