From 91a8f1ea4bd98a7de888f7d56e28b72cc0c63ca1 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Mon, 25 Jul 2011 20:26:19 +1000 Subject: [PATCH] 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 --- drivers/gpu/drm/nouveau/nouveau_fence.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c index c919cfc..81116cf 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); -- 2.7.4