[Intel-gfx] [PATCH] drm: i915: Fix audio issue on BXT

[Pandiyan, Dhinakaran]

On Thu, 2018-01-04 at 00:48 +0530, Gaurav K Singh wrote:
> From: Gaurav Singh <gaurav.k.singh at intel.com>
> 
> On Apollolake, with stress test warm reboot, audio card
> was not getting enumerated after reboot. This was a

The problem looks similar to
https://lists.freedesktop.org/archives/intel-gfx/2017-October/144495.html

although the proposed solutions are vastly different. I have Cc'd some
more people. 

> spurious issue happening on Apollolake. HW codec and
> HD audio controller link was going out of sync for which
> there was a fix in i915 driver but was not getting invoked
> for BXT. Extending this fix to BXT as well.
> 
> Tested on apollolake chromebook by stress test warm reboot
> with 2500 iterations.
> 
> Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_audio.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index f1502a0188eb..c71c04e1c3f6 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -729,7 +729,7 @@ static void i915_audio_component_codec_wake_override(struct device *kdev,
>  	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
>  	u32 tmp;
>  
> -	if (!IS_GEN9_BC(dev_priv))
> +	if (!IS_GEN9_BC(dev_priv) && !IS_BROXTON(dev_priv))

IS_GEN9()? GLK might need this too.


>  		return;
>  
>  	i915_audio_component_get_power(kdev);