[alsa-devel] [RFC PATCH v3 1/7] drm/i915: setup bridge for HDMI LPE audio driver

[Pierre-Louis Bossart]

On 11/24/16 7:31 AM, Ville Syrjälä wrote:
>> +static void lpe_audio_irq_unmask(struct irq_data *d)
>> +{
>> +	struct drm_device *dev = d->chip_data;
>> +	struct drm_i915_private *dev_priv = to_i915(dev);
>> +	unsigned long irqflags;
>> +	u32 val = (I915_LPE_PIPE_A_INTERRUPT |
>> +		I915_LPE_PIPE_B_INTERRUPT |
>> +		I915_LPE_PIPE_C_INTERRUPT);
> No pipe C on vlv.

Yes but does it hurt to set this bit? If the hardware is not present 
then there is no side effect, is there?