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drm/i915: Implement GPU reset for g33 

g33 seems to sit somewhere between the 915/945/965 style and the
g4x style. The bits look like g4x, but we still need to do a full
reset including display.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-11-21 21:54:28 +02:00 committed by Daniel Vetter
parent 59ea90543f
commit 408d4b9e1f
2 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/i915/i915_drv.c
View File

@ -881,8 +881,8 @@ int i915_reset(struct drm_device *dev)
if (INTEL_INFO(dev)->gen > 5)
intel_reset_gt_powersave(dev);
if ((IS_GEN3(dev) && !IS_G33(dev)) ||
(IS_GEN4(dev) && !IS_G4X(dev))) {
if (IS_GEN3(dev) || (IS_GEN4(dev) && !IS_G4X(dev))) {
intel_runtime_pm_disable_interrupts(dev_priv);
intel_runtime_pm_enable_interrupts(dev_priv);

12
drivers/gpu/drm/i915/intel_uncore.c
View File

@ -1369,6 +1369,14 @@ static int g4x_reset_complete(struct drm_device *dev)
return (gdrst & GRDOM_RESET_ENABLE) == 0;
}
static int g33_do_reset(struct drm_device *dev)
{
/* FIXME spec says to turn off all planes and wait 1 usec before reset */
pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE);
return wait_for(g4x_reset_complete(dev), 500);
}
static int g4x_do_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -1452,7 +1460,9 @@ int intel_gpu_reset(struct drm_device *dev)
return ironlake_do_reset(dev);
else if (IS_G4X(dev))
return g4x_do_reset(dev);
else if (IS_GEN4(dev) || (IS_GEN3(dev) && !IS_G33(dev)))
else if (IS_G33(dev))
return g33_do_reset(dev);
else if (INTEL_INFO(dev)->gen >= 3)
return i915_do_reset(dev);
else
return -ENODEV;