From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A50F97C for ; Mon, 19 Sep 2022 15:23:13 +0000 (UTC) Received: from [2a02:8108:963f:de38:eca4:7d19:f9a2:22c5]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1oaIc3-0001M2-Dm; Mon, 19 Sep 2022 17:23:11 +0200 Message-ID: Date: Mon, 19 Sep 2022 17:23:11 +0200 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.1 Subject: Re: [REGRESSION 5.19.x] AMD HD-audio devices missing on 5.19 #forregzbot Content-Language: en-US, de-DE From: Thorsten Leemhuis To: regressions@lists.linux.dev Cc: linux-kernel@vger.kernel.org References: <874jy4cqok.wl-tiwai@suse.de> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1663600993;48343573; X-HE-SMSGID: 1oaIc3-0001M2-Dm 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