mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

[media] cx25840: fix cx25840_s_stream for cx2388x and cx231xx 

For those two devices the code wrote to addresses 0x115/6, but on
those devices those addresses have nothing to do with power controls.
So clearly this never worked. Rather than writing to bogus addresses,
just do nothing for the cx2388x and cx231xx.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2015-11-30 10:26:35 -02:00 committed by Mauro Carvalho Chehab
parent 499ebed3ec
commit e69d89420e
1 changed files with 19 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/media/i2c/cx25840/cx25840-core.c
View File

@ -1716,26 +1716,27 @@ static int cx25840_s_stream(struct v4l2_subdev *sd, int enable)
v4l_dbg(1, cx25840_debug, client, "%s video output\n",
enable ? "enable" : "disable");
/*
* It's not clear what should be done for these devices.
* The original code used the same addresses as for the cx25840, but
* those addresses do something else entirely on the cx2388x and
* cx231xx. Since it never did anything in the first place, just do
* nothing.
*/
if (is_cx2388x(state) || is_cx231xx(state))
return 0;
if (enable) {
if (is_cx2388x(state) || is_cx231xx(state)) {
v = cx25840_read(client, 0x421) | 0x0b;
cx25840_write(client, 0x421, v);
} else {
v = cx25840_read(client, 0x115) | 0x0c;
cx25840_write(client, 0x115, v);
v = cx25840_read(client, 0x116) | 0x04;
cx25840_write(client, 0x116, v);
}
v = cx25840_read(client, 0x115) | 0x0c;
cx25840_write(client, 0x115, v);
v = cx25840_read(client, 0x116) | 0x04;
cx25840_write(client, 0x116, v);
} else {
if (is_cx2388x(state) || is_cx231xx(state)) {
v = cx25840_read(client, 0x421) & ~(0x0b);
cx25840_write(client, 0x421, v);
} else {
v = cx25840_read(client, 0x115) & ~(0x0c);
cx25840_write(client, 0x115, v);
v = cx25840_read(client, 0x116) & ~(0x04);
cx25840_write(client, 0x116, v);
}
v = cx25840_read(client, 0x115) & ~(0x0c);
cx25840_write(client, 0x115, v);
v = cx25840_read(client, 0x116) & ~(0x04);
cx25840_write(client, 0x116, v);
}
return 0;
}