As there is no datasheet, we can only follow the patent description https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/au88x0/au8820.h#n26
FIG. 15c is a diagrammatic block diagram of a mode register 382 of sub- buffer table 380(3) of FIG. 15b. Mode register 382 includes a check for fault flag 382(a), a had fault flag 382(b), a data format register 382(c), a read/write flag 382(d), an interrupt enable flag 382(e) and a current position register 382(f). Based upon the current sub-buffer and information about the previous value of the current sub-buffer table the CPU can determine that the peripheral has moved on to the next data segment. CPU 210 may then update the sub-buffer table. Current position register 382(f) is initially set by CPU 210 when the DMA channel is first established to indicate where to begin reading (or writing) data 150 from main memory 212 within the current data segment (e.g., 150(3)). During the process of retrieving data 150 from main memory 212, DMA engine 372 keeps track of the next location to be read from in the current data segment (e.g., 150(3)). The location of the next piece of data is stored in current position register 382(f). Thus, current position register 382(f) typically contains an offset address relative to the address of the current data segment (e.g., 150(3)). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1551041 Title: snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384, period size = 1024 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1551041/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
