[Intel-gfx] [PATCH 12/11] drm/i915: Reinitialize HPD after runtime D3

[Paulo Zanoni]

2015-08-19 15:13 GMT-03:00  <ville.syrjala at linux.intel.com>:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Runtime suspends disabled all interrupts, so in order to get them back
> fully we need to also do the HPD irq setup on runtime resume. Except
> on VLV/CHV where the display interrupt initialization is part of the
> display power well powerup.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 1d88745..4bbd3b7 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -1549,6 +1549,15 @@ static int intel_runtime_resume(struct device *device)
>         gen6_update_ring_freq(dev);
>
>         intel_runtime_pm_enable_interrupts(dev_priv);
> +
> +       /*
> +        * On VLV/CHV display interrupts are part of the display
> +        * power well, so hpd is reinitialized from there. For
> +        * everyone else do it here.
> +        */
> +       if (!IS_VALLEYVIEW(dev_priv))
> +               intel_hpd_init(dev_priv);

Maybe we should put this inside intel_runtime_pm_enable_interrupts()?
Either way: Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>

> +
>         intel_enable_gt_powersave(dev);
>
>         if (ret)
> --
> 2.4.6
>
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-- 
Paulo Zanoni