linux-kernel - Re: [REGRESSION] drm/amd/display: Add an hdmi_hpd_debounce_delay

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Message-ID: <aXp2FRLJh-7Q6TxS@earendel>
Date: Wed, 28 Jan 2026 15:48:21 -0500
From: Peter Colberg <pcolberg@...hat.com>
To: Alex Deucher <alexdeucher@...il.com>
Cc: Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Harry Wentland <harry.wentland@....com>,
	Leo Li <sunpeng.li@....com>, Rodrigo Siqueira <siqueira@...lia.com>,
	Ivan Lipski <ivan.lipski@....com>, amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	regressions@...ts.linux.dev,
	"Mario Limonciello (AMD)" <superm1@...nel.org>
Subject: Re: [REGRESSION] drm/amd/display: Add an hdmi_hpd_debounce_delay_ms
 module

On Wed, Jan 28, 2026 at 03:17:18PM -0500, Alex Deucher wrote:
> On Wed, Jan 28, 2026 at 3:09 PM Peter Colberg <pcolberg@...hat.com> wrote:
> >
> > Hi,
> >
> > I hit a regression introduced as part of v6.19-rc6 (and still present
> > in v6.19-rc7), where, upon unloading the amdgpu module, __flush_work()
> > is passed a work struct with the work function set to NULL. The issue
> > is seen with an AMD Radeon Pro W7900, but not an AMD Instinct MI210.
> 
> I think this should be fixed in:
> https://gitlab.freedesktop.org/agd5f/linux/-/commit/17b2c526fd8026d8e0f4c0e7f94fc517e3901589

That fix applied to v6.19-rc7 does indeed resolve the issue.

Thank you for the pointer and apologies for the noise.

Peter