[Intel-gfx] [PATCH] drm/i915/audio: Fix audio detection issue on GLK

[Jani Nikula]

On Sun, 08 Apr 2018, Gaurav K Singh <gaurav.k.singh at intel.com> wrote:
> On Geminilake, sometimes audio card is not getting
> detected after reboot. This is a spurious issue happening on
> Geminilake. 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 GLK. Extending this fix to GLK as well.
>
> Tested by Du,Wenkai on GLK board.
>
> Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_audio.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index 656f6c931341..73b1e0b96f88 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -729,7 +729,8 @@ 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) && !IS_BROXTON(dev_priv))
> +	if (!IS_GEN9_BC(dev_priv) && !IS_BROXTON(dev_priv) &&
> +						!IS_GEMINILAKE(dev_priv))

That could be written as

	if (!IS_GEN9_BC(dev_priv) && !IS_GEN9_LP(dev_priv))

which in turn could just be written as

	if (!IS_GEN9(dev_priv))

...but since GLK has gen 10 display, so I'm wondering if the same issue
will be present in gen 10 too, and whether this should just become

	if (INTEL_GEN(dev_priv) < 9)

BR,
Jani.



>  		return;
>  
>  	i915_audio_component_get_power(kdev);

-- 
Jani Nikula, Intel Open Source Technology Center