renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-22 12:14:01 +08:00
Code

[media] em28xx: make em28xx_set_outfmt() working with EM25xx family bridges

Browse Source 
Streaming doesn't work with the EM2765 if bit 5 of the output format register
0x27 is set.
It's actually not clear if really has to be set for the other chips, but for
now let's keep it to avoid regressions and add a comment to the code.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Frank Schaefer 2013-03-26 13:38:39 -03:00 committed by Mauro Carvalho Chehab
parent e507e0e513
commit c8c39796c4
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/media/usb/em28xx/em28xx-core.c
View File

@ -697,12 +697,23 @@ int em28xx_vbi_supported(struct em28xx *dev)
int em28xx_set_outfmt(struct em28xx *dev)
{
int ret;
u8 vinctrl;
u8 fmt, vinctrl;
ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT,
dev->format->reg | 0x20, 0xff);
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)