[dvblast-devel] [PATCH] Increase DVR buffer size to avoid overruns

[Marian Ďurkovič]

On Fri, Nov 13, 2009 at 05:21:49PM +0100, Marian Ďurkovič wrote:
> Hi,
> 
>   attached patch prevents DVR overruns on DVB-S2 cards when using
> dvblastctl ... fe_status 

Just for the record, ioctl(...,FE_READ_BER,...) from STB0899 frontend
takes > 500 msec due to this braindead code in the kernel driver:

                        /* average 5 BER values */
                        for (i = 0; i < 5; i++) {
                                msleep(100);
                                lsb = stb0899_read_reg(state, STB0899_ECNT1L);
                                msb = stb0899_read_reg(state, STB0899_ECNT1M);
                                *ber += MAKEWORD16(msb, lsb);
                        }
                        *ber /= 5;

    With kind regards,

         M.