[Intel-gfx] [PATCH v6 0/4] drm/i915/display: stop HPD workers before display driver unregister

[Andrzej Hajda]

Hi Imre, Jani, Ville,

Since one of CI test machines is back (bat-rpls-2) tests are regularly 
aborted on this machine due to bugs this patchset resolves [1], 
reviewing/merging these patches would allow to cure the situation on CI.

[1]: https://intel-gfx-ci.01.org/tree/drm-tip/bat-rpls-2.html

Regards
Andrzej

On 02.08.2022 14:24, Gwan-gyeong Mun wrote:
> Hi Jani, Ville and Imre,
> 
> If there are no problems after reviewing this patch series, could you 
> please merge it?
> 
> Many thanks,
> G.G.
> 
> On 7/22/22 3:51 PM, Andrzej Hajda wrote:
>> Hi Jani, Ville, Arun,
>>
>> This patchset is replacement of patch
>> "drm/i915/display: disable HPD workers before display driver 
>> unregister" [1].
>> Ive decided to split patch into two parts - fbdev and MST, there are 
>> different
>> issues.
>> Ive also dropped shutdown path, as it has slightly different 
>> requirements,
>> and more importantly I am not able to test properly.
>>
>> v2 (thx Arun for review):
>>    - reword of commit message (Arun)
>>    - intel_fbdev_hpd_set_suspend replaced with intel_fbdev_set_suspend 
>> (Arun)
>> v3:
>>    - new patch adding suspended flag, to handle
>>      https://gitlab.freedesktop.org/drm/intel/-/issues/5950
>> v4:
>>    - check suspend flag also in i915_digport_work_func
>> v5:
>>    - added patch blocking FB creation in case HPD is supended,
>>    - added R-B from Arun to patch 3, thx
>> v6:
>>    - finally, after getting direct access to bat-rpls-2, I have found 
>> the source of last WARN,
>>      intel_fbdev_hpd_set_suspend was not called in case of deferred 
>> setup, fixed in patch 2.
>>
>> [1]: https://patchwork.freedesktop.org/series/103811/
>>
>> Regards
>> Andrzej
>>
>>
>> Andrzej Hajda (4):
>>    drm/i915/hpd: postpone HPD cancel work after last user suspension
>>    drm/i915/fbdev: suspend HPD before fbdev unregistration
>>    drm/i915/display: add hotplug.suspended flag
>>    drm/i915/fbdev: do not create fbdev if HPD is suspended
>>
>>   drivers/gpu/drm/i915/display/intel_display.c |  3 +++
>>   drivers/gpu/drm/i915/display/intel_fbdev.c   | 12 ++++++++++--
>>   drivers/gpu/drm/i915/display/intel_hotplug.c | 11 ++++++++++-
>>   drivers/gpu/drm/i915/display/intel_hotplug.h |  2 +-
>>   drivers/gpu/drm/i915/i915_driver.c           |  4 ++--
>>   drivers/gpu/drm/i915/i915_drv.h              |  2 ++
>>   drivers/gpu/drm/i915/i915_irq.c              |  1 -
>>   7 files changed, 28 insertions(+), 7 deletions(-)
>>