[media] ks0127: fix querystd

Return V4L2_STD_UNKNOWN if no signal is detected.
Otherwise AND the standard mask with the detected standards.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/i2c/ks0127.c b/drivers/media/i2c/ks0127.c
index b5223e850a26fb5437755138c1474fa158dc31eb..c3e94ae82c03028ff48e9eec1719938b8849e8e0 100644 (file)
--- a/drivers/media/i2c/ks0127.c
+++ b/drivers/media/i2c/ks0127.c
@@ -609,17 +609,24 @@ static int ks0127_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd
 {
        int stat = V4L2_IN_ST_NO_SIGNAL;
        u8 status;
-       v4l2_std_id std = V4L2_STD_ALL;
+       v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
 
        status = ks0127_read(sd, KS_STAT);
        if (!(status & 0x20))            /* NOVID not set */
                stat = 0;
-       if (!(status & 0x01))                 /* CLOCK set */
+       if (!(status & 0x01)) {               /* CLOCK set */
                stat |= V4L2_IN_ST_NO_COLOR;
-       if ((status & 0x08))               /* PALDET set */
-               std = V4L2_STD_PAL;
+               std = V4L2_STD_UNKNOWN;
+       } else {
+               if ((status & 0x08))               /* PALDET set */
+                       std &= V4L2_STD_PAL;
+               else
+                       std &= V4L2_STD_NTSC;
+       }
+       if ((status & 0x10))               /* PALDET set */
+               std &= V4L2_STD_525_60;
        else
-               std = V4L2_STD_NTSC;
+               std &= V4L2_STD_625_50;
        if (pstd)
                *pstd = std;
        if (pstatus)