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[media] saa7115: improve querystd handling for the saa7115

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The saa7115 has better PAL/NTSC detection, so it can detect PAL even
though the chip is currently set up for NTSC.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-03-10 09:59:37 -03:00 committed by Mauro Carvalho Chehab
parent a0fc58868b
commit c875dee536
1 changed files with 28 additions and 28 deletions
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56
drivers/media/i2c/saa7115.c
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@ -1360,6 +1360,34 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
*/
reg1f = saa711x_read(sd, R_1F_STATUS_BYTE_2_VD_DEC);
if (state->ident == V4L2_IDENT_SAA7115) {
reg1e = saa711x_read(sd, R_1E_STATUS_BYTE_1_VD_DEC);
v4l2_dbg(1, debug, sd, "Status byte 1 (0x1e)=0x%02x\n", reg1e);
switch (reg1e & 0x03) {
case 1:
*std &= V4L2_STD_NTSC;
break;
case 2:
/*
* V4L2_STD_PAL just cover the european PAL standards.
* This is wrong, as the device could also be using an
* other PAL standard.
*/
*std &= V4L2_STD_PAL | V4L2_STD_PAL_N | V4L2_STD_PAL_Nc |
V4L2_STD_PAL_M | V4L2_STD_PAL_60;
break;
case 3:
*std &= V4L2_STD_SECAM;
break;
default:
/* Can't detect anything */
break;
}
}
v4l2_dbg(1, debug, sd, "Status byte 2 (0x1f)=0x%02x\n", reg1f);
/* horizontal/vertical not locked */
@ -1371,34 +1399,6 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
else
*std &= V4L2_STD_625_50;
if (state->ident != V4L2_IDENT_SAA7115)
goto ret;
reg1e = saa711x_read(sd, R_1E_STATUS_BYTE_1_VD_DEC);
switch (reg1e & 0x03) {
case 1:
*std &= V4L2_STD_NTSC;
break;
case 2:
/*
* V4L2_STD_PAL just cover the european PAL standards.
* This is wrong, as the device could also be using an
* other PAL standard.
*/
*std &= V4L2_STD_PAL | V4L2_STD_PAL_N | V4L2_STD_PAL_Nc |
V4L2_STD_PAL_M | V4L2_STD_PAL_60;
break;
case 3:
*std &= V4L2_STD_SECAM;
break;
default:
/* Can't detect anything */
break;
}
v4l2_dbg(1, debug, sd, "Status byte 1 (0x1e)=0x%02x\n", reg1e);
ret:
v4l2_dbg(1, debug, sd, "detected std mask = %08Lx\n", *std);