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 Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1551041 Title: snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384, period size = 1024 Status in alsa-driver package in Ubuntu: Triaged Bug description: Kernel oops in a new installed system, that I configuring ... ProblemType: KernelOops DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-8-generic 4.4.0-8.23 ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2 Uname: Linux 4.4.0-8-generic i686 NonfreeKernelModules: nvidia Annotation: Your system might become unstable now and might need to be restarted. ApportVersion: 2.20-0ubuntu3 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: olle 1606 F.... pulseaudio /dev/snd/controlC0: olle 1606 F.... pulseaudio Date: Mon Feb 29 00:00:56 2016 Failure: oops HibernationDevice: RESUME=UUID=03bed9e9-e39b-4107-8cd6-c2612af9a6aa InstallationDate: Installed on 2016-02-28 (0 days ago) InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Alpha i386 (20160226) IwConfig: enp31s0 no wireless extensions. lo no wireless extensions. MachineType: Hewlett-Packard HP xw8400 Workstation ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic root=UUID=2160f8ed-4aa3-4243-b5d6-f87c1967e253 ro quiet splash PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu9 RfKill: SourcePackage: linux Title: snd_au8820 0000:01:04.0: BUG: , pos = 16386, buffer size = 16384, period size = 1024 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/09/2009 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 786D5 v02.37 dmi.board.name: 0A08h dmi.board.vendor: Hewlett-Packard dmi.board.version: NA dmi.chassis.asset.tag: CZC722497N dmi.chassis.type: 6 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr786D5v02.37:bd07/09/2009:svnHewlett-Packard:pnHPxw8400Workstation:pvr:rvnHewlett-Packard:rn0A08h:rvrNA:cvnHewlett-Packard:ct6:cvr: dmi.product.name: HP xw8400 Workstation dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1551041/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
