linux/include/drm/i915_powerwell.h
Wang Xingchao a38911a3fe i915/drm: Add private api for power well usage
Haswell Display audio depends on power well in graphic side, it should
request power well before use it and release power well after use.
I915 will not shutdown power well if it detects audio is using.
This patch protects display audio crash for Intel Haswell C3 stepping board.

Signed-off-by: Wang Xingchao <xingchao.wang@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-06-06 17:32:16 +02:00

37 lines
1.5 KiB
C

/**************************************************************************
*
* Copyright 2013 Intel Inc.
* All Rights Reserved.
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**************************************************************************/
#ifndef _I915_POWERWELL_H_
#define _I915_POWERWELL_H_
/* For use by hda_i915 driver */
extern void i915_request_power_well(void);
extern void i915_release_power_well(void);
#endif /* _I915_POWERWELL_H_ */