openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

V4L/DVB (5886): zr36067: Fix problem setting norms 

The zr36067 driver doesn't make a distinction between the different sub-types
of NTSC, PAL, or SECAM norms.  For example, when the enum std ioctl returns
the PAL standard it returns PAL_BG|PAL_DK|PAL_H|PAL_I.

When setting the norm, it required the bitmask to match exactly the set of
norms used during the enumeration.  If just one norm was specified, for
example PAL_BG or NTSC_M, it would fail.  This violates the V4L2 spec,
"VIDIOC_S_STD accepts *one* or more flags..."

The key thing to realize is that V4L2_STD_PAL is not one bit, it is multiple
bits.  It's ok to call S_STD with any *one* of those bits, but the driver was
requiring *all* of them.

This fixes the S_STD function so that it will accept any set of one or more
PAL norms as PAL, and the same for NTSC and SECAM.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Ronald S. Bultje <rbultje@ronald.bitfreak.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Trent Piepho 2007-07-17 18:29:42 -03:00 committed by Mauro Carvalho Chehab
parent 9c837fb692
commit c812b67ca4
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/media/video/zoran_driver.c
View File

@ -3704,11 +3704,11 @@ zoran_do_ioctl (struct inode *inode,
dprintk(3, KERN_DEBUG "%s: VIDIOC_S_STD - norm=0x%llx\n",
ZR_DEVNAME(zr), (unsigned long long)*std);
if (*std == V4L2_STD_PAL)
if ((*std & V4L2_STD_PAL) && !(*std & ~V4L2_STD_PAL))
norm = VIDEO_MODE_PAL;
else if (*std == V4L2_STD_NTSC)
else if ((*std & V4L2_STD_NTSC) && !(*std & ~V4L2_STD_NTSC))
norm = VIDEO_MODE_NTSC;
else if (*std == V4L2_STD_SECAM)
else if ((*std & V4L2_STD_SECAM) && !(*std & ~V4L2_STD_SECAM))
norm = VIDEO_MODE_SECAM;
else if (*std == V4L2_STD_ALL)
norm = VIDEO_MODE_AUTO;