Il giorno domenica 30 agosto 2015 13:55:14 UTC+2, Alexis Jeandet ha scritto: > > Hi Andrea, > > Indeed my song is mono, so that may explain the issue. > > ok
> I also continued to investigate the code from Marcus, which if I > understood correctly, is based on your code. I got some successful results > also with this code. I think that Marcus wanted to merge the two structures > sunxi_priv > and sunxi_i2s_info and remove the sunxi_iis instance. > yes; the sunxi_iis is a leftover of the original legacy AW driver and the useful fields should be folded into the "private" data structure of the relevant alsa module. > There is still some points I don't get yet, if I understand correctly the > UDA is supposed to generate the sysclock with it's own PLL from bclk? > IIRC it's a PLL from the "left right" clock (ie frame rate 44.1 or 48 KHz) and the proper UDA register is set when there's WSPLL=1 on device tree.. > Then you have to set the multiplication factor on the UDA? For each song? > for earch sample rate.. > Or you just set it to 256 or 128fs and then just focus on i2s interface? > In this case 24 bits resolution wouldn't be possible? > the bit clock is a multiple of the FS changing when you have different bit resolutions. > Don't understand yet what ALSA does exactly, and I didn't check what is > done on i2c side. > > Best regards, > Alexis. > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
