[Intel-gfx] [PATCH v3 0/3] Various retries for LSPCON

[Jani Nikula]

On Tue, 10 Oct 2017, "Sharma, Shashank" <shashank.sharma at intel.com> wrote:
> Regards
>
> Shashank
>
>
> On 10/10/2017 3:42 PM, Saarinen, Jani wrote:
>> Hi,
>>
>>> -----Original Message-----
>>> From: Intel-gfx [mailto:intel-gfx-bounces at lists.freedesktop.org] On Behalf
>>> Of Shashank Sharma
>>> Sent: tiistai 10. lokakuuta 2017 13.08
>>> To: intel-gfx at lists.freedesktop.org
>>> Subject: [Intel-gfx] [PATCH v3 0/3] Various retries for LSPCON
>>>
>>> This patch series adds various retries and delays in DRM and I915 layer, to
>>> handle some of the read failures while dealing with LSPCON devices.
>> Should we have reference to fdo bugs?
>> https://bugs.freedesktop.org/show_bug.cgi?id=102294
>> https://bugs.freedesktop.org/show_bug.cgi?id=102295
> Yes, sure seems like a good idea.
>> and what about this?
>> https://bugs.freedesktop.org/show_bug.cgi?id=102359
> This seems like one probable candidate :)

Pushed the series, thanks for the patches and review. Added a bunch of
likely Bugzilla links to all commits, didn't bother with mapping commits
and bugs. Probably the whole series is needed for most of them anyway.

BR,
Jani.


>
> - Shashank
>>> LSPCON devices are sometimes slow to respond and the vendores expect us
>>> to retry while probing the device.
>>>
>>> The typical scenarios are getting fixed / handled with this patch series are
>>> look like this failure during LSPCON
>>> suspend/resume:
>>> [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed
>>> [drm:lspcon_wait_mode [i915]] *ERROR* Error reading LSPCON mode
>>> [drm:drm_lspcon_get_mode] *ERROR* LSPCON read(0x80, 0x41) failed
>>> [drm:lspcon_change_mode.constprop.4 [i915]] *ERROR* Error reading
>>> LSPCON mode [drm:lspcon_resume [i915]] *ERROR* LSPCON resume failed
>>> Setting dangerous option reset - tainting kernel
>>>
>>> Shashank Sharma (3):
>>>    drm: Add retries for lspcon mode detection
>>>    drm/i915: Don't give up waiting on INVALID_MODE
>>>    drm/i915: Add retries for LSPCON detection
>>>
>>>   drivers/gpu/drm/drm_dp_dual_mode_helper.c | 16 +++++++++++++---
>>>   drivers/gpu/drm/i915/intel_lspcon.c       | 22 +++++++++++++++-------
>>>   2 files changed, 28 insertions(+), 10 deletions(-)
>>>
>>> --
>>> 2.7.4
>>
>> Jani Saarinen
>> Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
>>
>>
>
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-- 
Jani Nikula, Intel Open Source Technology Center