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Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works.

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Hi Eric,

On Wed, Sep 25, 2024 at 07:54:40AM +0200, Eric wrote:
> Hi,
> 
> new bisect done !
> 
> On 24/09/2024 21:05, Salvatore Bonaccorso wrote:
> > Hi,
> > 
> > On Tue, Sep 24, 2024 at 08:17:34PM +0200, Eric wrote:
> > > > On 22/09/2024 21:22, Eric wrote:
> > > > The bisect is complete and yields this result
> > > > 
> > > > 15115033f056cbd7649b8e1806287f71bdb7ce5c is the first bad commit
> > > > commit 15115033f056cbd7649b8e1806287f71bdb7ce5c
> > > > Author: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> > > > Date:   Fri Jul 26 20:17:10 2024 +0200
> > > > 
> > > >      ice: don't busy wait for Rx queue disable in ice_qp_dis()
> > > > 
> > > > 
> > > > I posted too early ... looking back I found that nonsensical. Turns out on that last commit I had made a mistake. I suspect I booted on the wrong kernel that time.
> > > > I'll redo the last few rounds and post only after checking that the "first bad commit" indeed is bad.
> > > > Sorry for the noise
> > No problem, and thanks for the update. Yes I was confused once I saw
> > your mail and did not saw a relation of this to your HDMI sound issue.
> 
> Now, that one make a lot more sense (even though I wouldn't know how to
> handle this, it is clearly related) :
> 
> 
> 92afcc310038ebe5d66c689bb0bf418f5451201c is the first bad commit
> commit 92afcc310038ebe5d66c689bb0bf418f5451201c
> Author: Takashi Iwai <tiwai@suse.de>
> Date:   Wed Jul 31 19:05:15 2024 +0200
> 
>     ALSA: hda: Conditionally use snooping for AMD HDMI
> 
>     [ Upstream commit 478689b5990deb626a0b3f1ebf165979914d6be4 ]
> 
>     The recent regression report revealed that the use of WC pages for AMD
>     HDMI device together with AMD IOMMU leads to unexpected truncation or
>     noises.  The issue seems triggered by the change in the kernel core
>     memory allocation that enables IOMMU driver to use always S/G
>     buffers.  Meanwhile, the use of WC pages has been a workaround for the
>     similar issue with standard pages in the past.  So, now we need to
>     apply the workaround conditionally, namely, only when IOMMU isn't in
>     place.
> 
>     This patch modifies the workaround code to check the DMA ops at first
>     and apply the snoop-off only when needed.
> 
>     Fixes: f5ff79fddf0e ("dma-mapping: remove CONFIG_DMA_REMAP")
>     Link: https://bugzilla.kernel.org/show_bug.cgi?id=219087
>     Link: https://patch.msgid.link/20240731170521.31714-1-tiwai@suse.de
>     Signed-off-by: Takashi Iwai <tiwai@suse.de>
>     Signed-off-by: Sasha Levin <sashal@kernel.org>
> 
>  sound/pci/hda/hda_controller.h |  2 +-
>  sound/pci/hda/hda_intel.c      | 10 +++++++++-
> 
>  2 files changed, 10 insertions(+), 2 deletions(-)
> 
> 
> Regards

Awesome, thanks for the bisect.

Let's see how we can move from here on to report it to upstream with
your case.

Regards,
Salvatore

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Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric Degenetais <eric.4.debian@grabatoulnz.fr> - 2024-09-15 14:00 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-21 00:00 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Salvatore Bonaccorso <carnil@debian.org> - 2024-09-22 21:00 +0200
    Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-22 21:30 +0200
      Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-24 17:50 +0200
      Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-24 20:30 +0200
        Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Salvatore Bonaccorso <carnil@debian.org> - 2024-09-24 21:10 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Salvatore Bonaccorso <carnil@debian.org> - 2024-09-25 18:30 +0200
    Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-26 16:00 +0200
      Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Salvatore Bonaccorso <carnil@debian.org> - 2024-09-28 15:30 +0200
        Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-09-28 19:00 +0200
  Bug#1081833: [eric.4.debian@grabatoulnz.fr: Re: Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works.] Salvatore Bonaccorso <carnil@debian.org> - 2024-09-25 18:30 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Skye White <skye-debian@skyewhite.ca> - 2024-09-28 23:50 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Skye White <skye-debian@skyewhite.ca> - 2024-09-30 16:50 +0200
  Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-10-02 00:00 +0200
    Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Salvatore Bonaccorso <carnil@debian.org> - 2024-10-03 07:50 +0200
      Bug#1081833: linux-image-6.1.0-25-amd64: regression on linux-image-6.1.0-25.amd64 regular cracks in HDMI sound during playback - 6.1.0-23 works. Eric <eric.4.debian@grabatoulnz.fr> - 2024-10-05 15:40 +0200

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