FIG. 15e is a diagrammatic block diagram of a control register of FIG. 15d, in accordance with one embodiment. Control register 384(c) includes a sub-buffer enable interrupt flag 384(c)(0), a stop flag 384(c)(1) and a next segment pointer 384(c)(2). Sub-buffer enable interrupt flag 384(c)(0) typically serves a similar function as enable interrupt flag 382(f), except on the data segment level rather than the channel level.
... Stop flag 384(c)(1) typically indicates whether the data segment pointed to by data segment pointer 384 is the last data segment 150(n). When stop flag 384(c)(1) is set DMA engine 372 will cease operations for the particular DMA channel and the associated FIFO 306 after all the contents of the particular data segment has been read and processed. If stop flag 384(c)(1) is reset then DMA engine 372 may continue to the next data segment in the sequence. In theory, stop flag should be set at the last period how do the driver know which period is the last one? https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/core?id=48d882978eb0a15547093b4542a82b5c22548041 -- 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
