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>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 44abd7b..5066fd1 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -881,8 +881,8 @@
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);
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 68dc320..cf8ecc0 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1369,6 +1369,14 @@
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 @@
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;