Messages in this thread | | | Date | Mon, 19 Sep 2022 17:23:11 +0200 | Subject | Re: [REGRESSION 5.19.x] AMD HD-audio devices missing on 5.19 #forregzbot | From | Thorsten Leemhuis <> |
| |
TWIMC: this mail is primarily send for documentation purposes and for regzbot, my Linux kernel regression tracking bot. These mails usually contain '#forregzbot' in the subject, to make them easy to spot and filter.
On 24.08.22 09:13, Thorsten Leemhuis wrote:
> On 22.08.22 16:12, Takashi Iwai wrote: >> >> we've received regression reports about the missing HD-audio devices >> on AMD platforms, and this turned out to be caused by the commit >> 512881eacfa72c2136b27b9934b7b27504a9efc2 >> bus: platform,amba,fsl-mc,PCI: Add device DMA ownership management >> >> The details are found in openSUSE bugzilla: >> https://bugzilla.suse.com/show_bug.cgi?id=1202492 >> >> The problem seems to be that HD-audio (both onboard analog and HDMI) >> PCI devices are assigned to the same IOMMU group as AMD graphics PCI >> device, and once after the AMDGPU is initialized beforehand, those >> audio devices can't be probed since iommu_device_use_default_domain() >> returns -EBUSY. >> >> I'm not sure whether it's specific to PCI bus due to the assignment >> logic of those IOMMU groups, or it's about the handling of the active >> domain assignment. In anyway, disabling IOMMU works around the >> problem, and passing driver_managed_dma flag to the HD-audio driver >> was also confirmed to work around it, too. >> >> The problem persists with 6.0-rc1 kernel. >> >> If you have / can give any fix patch or debug patch, let me know; I'll >> build test kernels and ask the reporters. > > Thanks for the report. To be sure below issue doesn't fall through the > cracks unnoticed, I'm adding it to regzbot, my Linux kernel regression > tracking bot: > > #regzbot introduced 512881eacfa72c2136b27b99 ^ > https://bugzilla.suse.com/show_bug.cgi?id=1202492 > #regzbot title AMD HD-audio devices missing on 5.19 > #regzbot ignore-activity
#regzbot fixed-by: 2380f1e8195ef612deea
| |