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

[Saarinen, Jani]

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
and what about this?
https://bugs.freedesktop.org/show_bug.cgi?id=102359

> 
> 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