diff options
| author |   Wang Xingchao <xingchao.wang@linux.intel.com> | 2013-05-30 22:07:11 +0800 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-06-06 17:32:16 +0200 |
| commit | a38911a3fede294e2adfd2deea8104dfbbd760c5 (patch) | |
| tree | 9262c62e16108554fb626cb04189d17e449bb938 /drivers/gpu/drm/i915/i915_dma.c | |
| parent | ALSA: hda - Add power-welll support for haswell HDA (diff) | |
| download | linux-dev-a38911a3fede294e2adfd2deea8104dfbbd760c5.tar.xz linux-dev-a38911a3fede294e2adfd2deea8104dfbbd760c5.zip | |
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>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 22534c3b4fe5..fd8898c8f8e3 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1656,6 +1656,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) /* Start out suspended */ dev_priv->mm.suspended = 1; + if (HAS_POWER_WELL(dev)) + i915_init_power_well(dev); + if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = i915_load_modeset_init(dev); if (ret < 0) { @@ -1712,6 +1715,9 @@ int i915_driver_unload(struct drm_device *dev) intel_gpu_ips_teardown(); + if (HAS_POWER_WELL(dev)) + i915_remove_power_well(dev); + i915_teardown_sysfs(dev); if (dev_priv->mm.inactive_shrinker.shrink) |