[Intel-gfx] [PATCH 0/3] Fixes for HPD

[Lyude]

Forgot to mention, Ville: if you could get me an example of how to get
vlv into an infinite loop with these patches I'd appreciate that. I
haven't been able to reproduce this at all with the Valleyview machine
I've got here.

On Fri, 2016-06-17 at 17:58 -0400, Lyude wrote:
> These are a couple of patches intended to fix one of the big problems
> we have
> with a lot of chipsets on i915 right now: in the various forms of
> suspend we
> use in the driver, many of them break HPD while active and can lead
> to some
> seriously confusing situations where they can't get their monitors to
> turn on.
> 
> The patches here for fixing Valleyview need to be used with Ville
> Syrjälä's
> patchset for (partially?) preventing valleyview from getting in an
> infinite hpd
> detect loop when doing polling:
> 
> https://patchwork.freedesktop.org/series/5884/
> 
> It should also be noted some of these are resends, since the original
> patches
> never got picked up by patchwork
> 
> Lyude (3):
>   drm/i915/vlv: Make intel_crt_reset() per-encoder
>   drm/i915/vlv: Reset the ADPA in vlv_display_power_well_init()
>   drm/i915: Enable polling when we don't have hpd
> 
> Cc: stable at vger.kernel.org
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter at intel.com>
> 
>  drivers/gpu/drm/i915/i915_drv.c         |  7 +++-
>  drivers/gpu/drm/i915/i915_drv.h         |  3 ++
>  drivers/gpu/drm/i915/intel_crt.c        | 10 ++---
>  drivers/gpu/drm/i915/intel_drv.h        |  4 +-
>  drivers/gpu/drm/i915/intel_hotplug.c    | 69
> ++++++++++++++++++++++++++++-----
>  drivers/gpu/drm/i915/intel_runtime_pm.c | 10 +++++
>  6 files changed, 86 insertions(+), 17 deletions(-)
> 
-- 
Cheers,
	Lyude