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authorZhenyu Wang <zhenyuw@linux.intel.com>2009-11-25 13:09:39 +0800
committerEric Anholt <eric@anholt.net>2010-01-12 15:07:34 -0800
commitb9241ea31fae4887104e5d1b3b18f4009c25a0c4 (patch)
treedbaea468aaf9d957ec2924ca6c7cc9501f963ca8
parent7c3f0a2726fed78e0e0afe3b6fc3c1f5b298e447 (diff)
downloadop-kernel-dev-b9241ea31fae4887104e5d1b3b18f4009c25a0c4.zip
op-kernel-dev-b9241ea31fae4887104e5d1b3b18f4009c25a0c4.tar.gz
drm/i915: Don't wait interruptible for possible plane buffer flush
When we setup buffer for display plane, we'll check any pending required GPU flush and possible make interruptible wait for flush complete. But that wait would be most possibly to fail in case of signals received for X process, which will then fail modeset process and put display engine in unconsistent state. The result could be blank screen or CPU hang, and DDX driver would always turn on outputs DPMS after whatever modeset fails or not. So this one creates new helper for setup display plane buffer, and when needing flush using uninterruptible wait for that. This one should fix bug like https://bugs.freedesktop.org/show_bug.cgi?id=24009. Also fixing mode switch stress test on Ironlake. Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by: Eric Anholt <eric@anholt.net>
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h1
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c51
-rw-r--r--drivers/gpu/drm/i915/intel_display.c2
3 files changed, 53 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 29dd676..445c49c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -864,6 +864,7 @@ int i915_do_wait_request(struct drm_device *dev, uint32_t seqno, int interruptib
int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
int i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj,
int write);
+int i915_gem_object_set_to_display_plane(struct drm_gem_object *obj);
int i915_gem_attach_phys_object(struct drm_device *dev,
struct drm_gem_object *obj, int id);
void i915_gem_detach_phys_object(struct drm_device *dev,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2748609..0f4afa3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2837,6 +2837,57 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write)
return 0;
}
+/*
+ * Prepare buffer for display plane. Use uninterruptible for possible flush
+ * wait, as in modesetting process we're not supposed to be interrupted.
+ */
+int
+i915_gem_object_set_to_display_plane(struct drm_gem_object *obj)
+{
+ struct drm_device *dev = obj->dev;
+ struct drm_i915_gem_object *obj_priv = obj->driver_private;
+ uint32_t old_write_domain, old_read_domains;
+ int ret;
+
+ /* Not valid to be called on unbound objects. */
+ if (obj_priv->gtt_space == NULL)
+ return -EINVAL;
+
+ i915_gem_object_flush_gpu_write_domain(obj);
+
+ /* Wait on any GPU rendering and flushing to occur. */
+ if (obj_priv->active) {
+#if WATCH_BUF
+ DRM_INFO("%s: object %p wait for seqno %08x\n",
+ __func__, obj, obj_priv->last_rendering_seqno);
+#endif
+ ret = i915_do_wait_request(dev, obj_priv->last_rendering_seqno, 0);
+ if (ret != 0)
+ return ret;
+ }
+
+ old_write_domain = obj->write_domain;
+ old_read_domains = obj->read_domains;
+
+ obj->read_domains &= I915_GEM_DOMAIN_GTT;
+
+ i915_gem_object_flush_cpu_write_domain(obj);
+
+ /* It should now be out of any other write domains, and we can update
+ * the domain values for our changes.
+ */
+ BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
+ obj->read_domains |= I915_GEM_DOMAIN_GTT;
+ obj->write_domain = I915_GEM_DOMAIN_GTT;
+ obj_priv->dirty = 1;
+
+ trace_i915_gem_object_change_domain(obj,
+ old_read_domains,
+ old_write_domain);
+
+ return 0;
+}
+
/**
* Moves a single object to the CPU read, and possibly write domain.
*
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 42e8c03..4b96a54 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1207,7 +1207,7 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
return ret;
}
- ret = i915_gem_object_set_to_gtt_domain(obj, 1);
+ ret = i915_gem_object_set_to_display_plane(obj);
if (ret != 0) {
i915_gem_object_unpin(obj);
mutex_unlock(&dev->struct_mutex);
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