[Intel-gfx] [PATCH 07/10] drm/i915: Warn if irq_mask isn't ~0 during vlv/cvh display irq postinstall

[Imre Deak]

On ma, 2016-04-11 at 16:56 +0300, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> We expect vlv_display_irq_reset() to have been called prior to
> vlv_display_irq_postinstall() so let's WARN if that isn't the case.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Imre Deak <imre.deak at intel.com>

> ---
>  drivers/gpu/drm/i915/i915_irq.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c
> b/drivers/gpu/drm/i915/i915_irq.c
> index f6815e47d8de..872f93dc68ff 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -3318,6 +3318,9 @@ static void vlv_display_irq_postinstall(struct
> drm_i915_private *dev_priv)
>  		I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
>  	if (IS_CHERRYVIEW(dev_priv))
>  		enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
> +
> +	WARN_ON(dev_priv->irq_mask != ~0);
> +
>  	dev_priv->irq_mask = ~enable_mask;
>  
>  	GEN5_IRQ_INIT(VLV_, dev_priv->irq_mask, enable_mask);