diff options
| author | Frank Schaefer <fschaefer.oss@googlemail.com> | 2013-02-10 16:05:11 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-04 14:30:18 -0300 |
| commit | 8168532712fe0c662f22180755fb89103a2e6558 (patch) | |
| tree | c057eae582bb97b1e457f2b2f233b0c60b76e2c7 /drivers | |
| parent | 84e902aa05b628b940c4a17ea2c92ec4fbcffc18 (diff) | |
[media] em28xx: introduce #define for maximum supported scaling values (register 0x30-0x33)
The maximum supported scaling value for registers 0x30+0x31 (horizontal scaling)
and 0x32+0x33 (vertical scaling) is 0x3fff, which corresponds to 20% of the
input frame size.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-reg.h | 2 | ||||
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-video.c | 8 |
2 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-reg.h b/drivers/media/usb/em28xx/em28xx-reg.h index 885089e22bcd..0a3cb04fbeae 100644 --- a/drivers/media/usb/em28xx/em28xx-reg.h +++ b/drivers/media/usb/em28xx/em28xx-reg.h @@ -152,6 +152,8 @@ #define EM28XX_R31_HSCALEHIGH 0x31 #define EM28XX_R32_VSCALELOW 0x32 #define EM28XX_R33_VSCALEHIGH 0x33 +#define EM28XX_HVSCALE_MAX 0x3fff /* => 20% */ + #define EM28XX_R34_VBI_START_H 0x34 #define EM28XX_R35_VBI_START_V 0x35 #define EM28XX_R36_VBI_WIDTH 0x36 diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c index 6d261232278c..9451e1ed0ec8 100644 --- a/drivers/media/usb/em28xx/em28xx-video.c +++ b/drivers/media/usb/em28xx/em28xx-video.c @@ -807,12 +807,12 @@ static void get_scale(struct em28xx *dev, unsigned int maxh = norm_maxh(dev); *hscale = (((unsigned long)maxw) << 12) / width - 4096L; - if (*hscale >= 0x4000) - *hscale = 0x3fff; + if (*hscale > EM28XX_HVSCALE_MAX) + *hscale = EM28XX_HVSCALE_MAX; *vscale = (((unsigned long)maxh) << 12) / height - 4096L; - if (*vscale >= 0x4000) - *vscale = 0x3fff; + if (*vscale > EM28XX_HVSCALE_MAX) + *vscale = EM28XX_HVSCALE_MAX; } /* ------------------------------------------------------------------ |