[Intel-gfx] [PATCH 09/10] drm/i915: remove modeset reset from i915_reset

[Daniel Vetter]

On gen4+ we don't reset the display unit, so resetting the complete
modeset state should not be necessary.

We can't do reset on gen3 anyway, which leaves us with gen2 reset:
According to Chris Wilson, that doesn't work so great, so he suggested
we just ignore that. If the need ever arrises, we can re-add it later
on.

Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/i915_drv.c |   10 ----------
 1 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 0c97b9b..7a09c28 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -902,21 +902,11 @@ int i915_reset(struct drm_device *dev)
 			intel_modeset_init_hw(dev);
 
 		drm_irq_uninstall(dev);
-		drm_mode_config_reset(dev);
 		drm_irq_install(dev);
 	} else {
 		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.
-	 */
-	mutex_lock(&dev->mode_config.mutex);
-	drm_helper_resume_force_mode(dev);
-	mutex_unlock(&dev->mode_config.mutex);
-
 	return 0;
 }
 
-- 
1.7.9