openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/nouveau: workaround semaphore hw bug causing unnecessary interrupts 

The HW will only accept the DMA_FROM_MEMORY class for DMA_SEMAPHORE without
asking the driver to intervene.

It appears that semaphores will work correctly even without DMA_IN_MEMORY,
so lets avoid the large amount of interrupts generated by x-chan sync.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-07-25 20:26:19 +10:00
parent afb0c796d8
commit 91a8f1ea4b
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/nouveau/nouveau_fence.c
View File

@ -519,7 +519,7 @@ nouveau_fence_channel_init(struct nouveau_channel *chan)
if (USE_SEMA(dev) && dev_priv->chipset < 0x84) {
struct ttm_mem_reg *mem = &dev_priv->fence.bo->bo.mem;
ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_IN_MEMORY,
ret = nouveau_gpuobj_dma_new(chan, NV_CLASS_DMA_FROM_MEMORY,
mem->start << PAGE_SHIFT,
mem->size, NV_MEM_ACCESS_RW,
NV_MEM_TARGET_VRAM, &obj);