diff options
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-core.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c index b2dcb3d1342d..575a46a18e1f 100644 --- a/drivers/media/usb/em28xx/em28xx-core.c +++ b/drivers/media/usb/em28xx/em28xx-core.c @@ -697,12 +697,23 @@ int em28xx_vbi_supported(struct em28xx *dev) int em28xx_set_outfmt(struct em28xx *dev) { int ret; - u8 vinctrl; - - ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT, - dev->format->reg | 0x20, 0xff); + u8 fmt, vinctrl; + + fmt = dev->format->reg; + if (!dev->is_em25xx) + fmt |= 0x20; + /* + * NOTE: it's not clear if this is really needed ! + * The datasheets say bit 5 is a reserved bit and devices seem to work + * fine without it. But the Windows driver sets it for em2710/50+em28xx + * devices and we've always been setting it, too. + * + * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, + * it's likely used for an additional (compressed ?) format there. + */ + ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); if (ret < 0) - return ret; + return ret; ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, dev->vinmode); if (ret < 0) |
