diff options
Diffstat (limited to 'drivers/media/video/cx25840/cx25840-firmware.c')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-firmware.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/media/video/cx25840/cx25840-firmware.c b/drivers/media/video/cx25840/cx25840-firmware.c index e1a7823d82cdee..f59ced181c553a 100644 --- a/drivers/media/video/cx25840/cx25840-firmware.c +++ b/drivers/media/video/cx25840/cx25840-firmware.c @@ -20,11 +20,22 @@ #include <linux/i2c-algo-bit.h> #include <linux/firmware.h> #include <media/v4l2-common.h> +#include <media/cx25840.h> -#include "cx25840.h" +#include "cx25840-core.h" #define FWFILE "v4l-cx25840.fw" -#define FWSEND 1024 + +/* + * Mike Isely <isely@pobox.com> - The FWSEND parameter controls the + * size of the firmware chunks sent down the I2C bus to the chip. + * Previously this had been set to 1024 but unfortunately some I2C + * implementations can't transfer data in such big gulps. + * Specifically, the pvrusb2 driver has a hard limit of around 60 + * bytes, due to the encapsulation there of I2C traffic into USB + * messages. So we have to significantly reduce this parameter. + */ +#define FWSEND 48 #define FWDEV(x) &((x)->adapter->dev) |