From: Jakob Bornecrantz <jakob@xxxxxxxxxx>
This fixes kernel panics when running the vbltest from the drm repo. We
can't just skip initializing the vblank system since it sets up certain
state for us, see: "vmwgfx: Enable use of the vblank system."
Signed-off-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 ++
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 2 ++
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 19 +++++++++++++++++++
3 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index e07dcf4..b8eb8cd 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1069,6 +1069,8 @@ static struct drm_driver driver = {
.irq_uninstall = vmw_irq_uninstall,
.irq_handler = vmw_irq_handler,
.get_vblank_counter = vmw_get_vblank_counter,
+ .enable_vblank = vmw_enable_vblank,
+ .disable_vblank = vmw_disable_vblank,
.reclaim_buffers_locked = NULL,
.ioctls = vmw_ioctls,
.num_ioctls = DRM_ARRAY_SIZE(vmw_ioctls),
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 0e9b2ce..30589d0 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -618,6 +618,8 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
uint32_t pitch,
uint32_t height);
u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc);
+int vmw_enable_vblank(struct drm_device *dev, int crtc);
+void vmw_disable_vblank(struct drm_device *dev, int crtc);
int vmw_kms_present(struct vmw_private *dev_priv,
struct drm_file *file_priv,
struct vmw_framebuffer *vfb,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 2421d0c..39b99db 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1459,11 +1459,30 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
return ((u64) pitch * (u64) height) < (u64) dev_priv->vram_size;
}
+
+/**
+ * Function called by DRM code called with vbl_lock held.
+ */
u32 vmw_get_vblank_counter(struct drm_device *dev, int crtc)
{
return 0;
}
+/**
+ * Function called by DRM code called with vbl_lock held.
+ */
+int vmw_enable_vblank(struct drm_device *dev, int crtc)
+{
+ return -ENOSYS;
+}
+
+/**
+ * Function called by DRM code called with vbl_lock held.
+ */
+void vmw_disable_vblank(struct drm_device *dev, int crtc)
+{
+}
+
/*
* Small shared kms functions.
--
1.7.4.4
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