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snd/hda, drm/i915: Track the display_power_status using a cookie

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drm/i915 is tracking all wakeref owners with a cookie in order to
identify leaks. To that end, each rpm acquisition ops->get_power is
assigned a cookie which should be passed to ops->put_power to signify
its release (and removal from the list of wakeref owners). As snd/hda is
already using a bool to track current status of display_power extending
that to an unsigned long to hold the boolean cookie is a trivial
extension, and will quell all doubt that snd/hda is the cause of the
device runtime pm leaks.

v2: Keep using the power abstraction for local wakeref tracking.
v3: BUILD_BUG_ON impedance mismatch

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Jani Nikula <jani.nikula@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190213152109.16997-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-02-13 15:21:09 +00:00
parent 290248c27c
commit d31c85fc86
4 changed files with 32 additions and 18 deletions
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7
include/drm/drm_audio_component.h
View file

@ -18,14 +18,17 @@ struct drm_audio_component_ops {
* @get_power: get the POWER_DOMAIN_AUDIO power well
*
* Request the power well to be turned on.
*
* Returns a wakeref cookie to be passed back to the corresponding
* call to @put_power.
*/
void (*get_power)(struct device *);
unsigned long (*get_power)(struct device *);
/**
* @put_power: put the POWER_DOMAIN_AUDIO power well
*
* Allow the power well to be turned off.
*/
void (*put_power)(struct device *);
void (*put_power)(struct device *, unsigned long);
/**
* @codec_wake_override: Enable/disable codec wake signal
*/