From: Ben Skeggs Date: Mon, 25 Jul 2011 10:26:19 +0000 (+1000) Subject: drm/nouveau: workaround semaphore hw bug causing unnecessary interrupts X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=91a8f1ea4bd98a7de888f7d56e28b72cc0c63ca1;p=linux-beck.git 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 --- diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c index c919cfc8f2fd..81116cfea275 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fence.c +++ b/drivers/gpu/drm/nouveau/nouveau_fence.c @@ -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);