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drm/i915: simplify i915_reset a bit

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- need_display is always true, scrap it.
- don't reacquire the mutex to do nothing after having restored the
  gem state.

Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-04-27 15:17:41 +02:00
parent d54423037f
commit bcbc324a21
1 changed files with 5 additions and 14 deletions
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19
drivers/gpu/drm/i915/i915_drv.c
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@ -787,11 +787,6 @@ static int gen6_do_reset(struct drm_device *dev, u8 flags)
int i915_reset(struct drm_device *dev, u8 flags)
{
drm_i915_private_t *dev_priv = dev->dev_private;
/*
* We really should only reset the display subsystem if we actually
* need to
*/
bool need_display = true;
int ret;
if (!i915_try_reset)
@ -865,22 +860,18 @@ int i915_reset(struct drm_device *dev, u8 flags)
drm_irq_uninstall(dev);
drm_mode_config_reset(dev);
drm_irq_install(dev);
mutex_lock(&dev->struct_mutex);
} else {
mutex_unlock(&dev->struct_mutex);
}
mutex_unlock(&dev->struct_mutex);
/*
* Perform a full modeset as on later generations, e.g. Ironlake, we may
* need to retrain the display link and cannot just restore the register
* values.
*/
if (need_display) {
mutex_lock(&dev->mode_config.mutex);
drm_helper_resume_force_mode(dev);
mutex_unlock(&dev->mode_config.mutex);
}
mutex_lock(&dev->mode_config.mutex);
drm_helper_resume_force_mode(dev);
mutex_unlock(&dev->mode_config.mutex);
return 0;
}