After a gpu reset we need to re-init some of the hw state we only
initialize when modeset is enabled, like rc6, hw contexts or render/GT
core clock gating and workaround register settings.
Note that this patch has a small change in the resume code:
- rc6 on gen6+ is only restored for the modeset case (for more
consistency with other callsites). This is no problem because recent
kernels refuse to load drm/i915 without kms on gen6+
- rc6/emon on ilk is only restored for the modeset case. This is no
problem because rc6 is disabled by default on ilk, and ums on ilk
has never really been a supported option outside of horrible rhel
backports.
v2: Chris Wilson noticed that we not only fail to restore the clock
gating settings after gpu reset.
v3: Move the call to modeset_init_hw in _reset out of the
struct_mutext protected area - other callers don't hold it, too.
Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/i915_drv.c | 5 +++++
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_suspend.c | 12 +-----------
drivers/gpu/drm/i915/intel_display.c | 29 ++++++++++++++++++-----------
4 files changed, 25 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 96f8efc..ccfdc81 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -851,9 +851,14 @@ int i915_reset(struct drm_device *dev, u8 flags)
i915_gem_init_ppgtt(dev);
mutex_unlock(&dev->struct_mutex);
+
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ intel_modeset_init_hw(dev);
+
drm_irq_uninstall(dev);
drm_mode_config_reset(dev);
drm_irq_install(dev);
+
mutex_lock(&dev->struct_mutex);
}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7dcdccb..ed2d235 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1429,6 +1429,7 @@ static inline void intel_unregister_dsm_handler(void) { return; }
#endif /* CONFIG_ACPI */
/* modesetting */
+extern void intel_modeset_init_hw(struct drm_device *dev);
extern void intel_modeset_init(struct drm_device *dev);
extern void intel_modeset_gem_init(struct drm_device *dev);
extern void intel_modeset_cleanup(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 2b5eb22..0c3e3bf 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -879,17 +879,7 @@ int i915_restore_state(struct drm_device *dev)
mutex_unlock(&dev->struct_mutex);
if (drm_core_check_feature(dev, DRIVER_MODESET))
- intel_init_clock_gating(dev);
-
- if (IS_IRONLAKE_M(dev)) {
- ironlake_enable_drps(dev);
- intel_init_emon(dev);
- }
-
- if (INTEL_INFO(dev)->gen >= 6) {
- gen6_enable_rps(dev_priv);
- gen6_update_ring_freq(dev_priv);
- }
+ intel_modeset_init_hw(dev);
mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 42dbe14..a1f2d19 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9532,6 +9532,23 @@ static void i915_disable_vga(struct drm_device *dev)
POSTING_READ(vga_reg);
}
+void intel_modeset_init_hw(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ intel_init_clock_gating(dev);
+
+ if (IS_IRONLAKE_M(dev)) {
+ ironlake_enable_drps(dev);
+ intel_init_emon(dev);
+ }
+
+ if (IS_GEN6(dev) || IS_GEN7(dev)) {
+ gen6_enable_rps(dev_priv);
+ gen6_update_ring_freq(dev_priv);
+ }
+}
+
void intel_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -9577,17 +9594,7 @@ void intel_modeset_init(struct drm_device *dev)
i915_disable_vga(dev);
intel_setup_outputs(dev);
- intel_init_clock_gating(dev);
-
- if (IS_IRONLAKE_M(dev)) {
- ironlake_enable_drps(dev);
- intel_init_emon(dev);
- }
-
- if (IS_GEN6(dev) || IS_GEN7(dev)) {
- gen6_enable_rps(dev_priv);
- gen6_update_ring_freq(dev_priv);
- }
+ intel_modeset_init_hw(dev);
INIT_WORK(&dev_priv->idle_work, intel_idle_update);
setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
--
1.7.9.1
