i915/drm: Add private api for power well usage

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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>

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Wang Xingchao 2013-05-30 22:07:11 +08:00 • committed by Daniel Vetter

parent 99a2008d0b

commit a38911a3fe

5 changed files with 132 additions and 7 deletions

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include/drm/i915_powerwell.h

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