linux-kernel - Re: [PATCH v5 00/10] drm: zynqmp_dp: IRQ cleanups and debugfs support

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Message-ID: <5c5aa8ae-75c4-4f0f-ad19-50ad57c61216@linux.dev>
Date: Mon, 17 Jun 2024 10:48:58 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 dri-devel@...ts.freedesktop.org
Cc: linux-arm-kernel@...ts.infradead.org, David Airlie <airlied@...il.com>,
 linux-kernel@...r.kernel.org, Daniel Vetter <daniel@...ll.ch>,
 Michal Simek <michal.simek@....com>
Subject: Re: [PATCH v5 00/10] drm: zynqmp_dp: IRQ cleanups and debugfs support

On 6/17/24 03:47, Tomi Valkeinen wrote:
> Hi Sean,
> 
> On 03/05/2024 22:29, Sean Anderson wrote:
>> This series cleans up the zyqnmp_dp IRQ and locking situation. Once
>> that's done, it adds debugfs support. The intent is to enable compliance
>> testing or to help debug signal-integrity issues.
>>
>> Last time I discussed converting the HPD work(s) to a threaded IRQ. I
>> did not end up doing that for this series since the steps would be
>>
>> - Add locking
>> - Move link retraining to a work function
>> - Harden the IRQ
>> - Merge the works into a threaded IRQ (omitted)
>>
>> Which with the exception of the final step is the same as leaving those
>> works as-is. Conversion to a threaded IRQ can be done as a follow-up.
> 
> I tested this, and the "drm: zynqmp_dp: Convert to a hard IRQ" causes a hang for me when unloading the drivers. Unfortunately I'm not in the condition to debug it at the moment.
> 
> I have picked the first three patches into drm-misc-next, though, to decrease the number of patches in the series a bit. They looked independent and safe enough to apply.

Are you running into [1]?

--Sean

[1] https://lore.kernel.org/dri-devel/4d8f4c9b-2efb-4774-9a37-2f257f79b2c9@linux.dev/