drm/radeon: skip async dma init on r6xx

The hw is buggy and it's not currently used, but it's
currently still initialized by the driver.  Skip the init.
Skipping init also seems to improve stability with dpm on
some r6xx asics.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=66963

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

2 files changed, 6 insertions, 23 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 3dce370adc1..4d69d1745d5 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2612,6 +2612,11 @@ int r600_cp_resume(struct radeon_device *rdev)
 		ring->ready = false;
 		return r;
 	}
+
+	/* RV7xx+ uses dma for paging */
+	if (rdev->family < CHIP_RV770)
+		radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
+
 	return 0;
 }
 
@@ -2895,12 +2900,6 @@ static int r600_startup(struct radeon_device *rdev)
 		return r;
 	}
 
-	r = radeon_fence_driver_start_ring(rdev, R600_RING_TYPE_DMA_INDEX);
-	if (r) {
-		dev_err(rdev->dev, "failed initializing DMA fences (%d).\n", r);
-		return r;
-	}
-
 	/* Enable IRQ */
 	if (!rdev->irq.installed) {
 		r = radeon_irq_kms_init(rdev);
@@ -2922,12 +2921,6 @@ static int r600_startup(struct radeon_device *rdev)
 	if (r)
 		return r;
 
-	ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
-	r = radeon_ring_init(rdev, ring, ring->ring_size, R600_WB_DMA_RPTR_OFFSET,
-			     DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0));
-	if (r)
-		return r;
-
 	r = r600_cp_load_microcode(rdev);
 	if (r)
 		return r;
@@ -2935,10 +2928,6 @@ static int r600_startup(struct radeon_device *rdev)
 	if (r)
 		return r;
 
-	r = r600_dma_resume(rdev);
-	if (r)
-		return r;
-
 	r = radeon_ib_pool_init(rdev);
 	if (r) {
 		dev_err(rdev->dev, "IB initialization failed (%d).\n", r);
@@ -2997,7 +2986,6 @@ int r600_suspend(struct radeon_device *rdev)
 	radeon_pm_suspend(rdev);
 	r600_audio_fini(rdev);
 	r600_cp_stop(rdev);
-	r600_dma_stop(rdev);
 	r600_irq_suspend(rdev);
 	radeon_wb_disable(rdev);
 	r600_pcie_gart_disable(rdev);
@@ -3077,9 +3065,6 @@ int r600_init(struct radeon_device *rdev)
 	rdev->ring[RADEON_RING_TYPE_GFX_INDEX].ring_obj = NULL;
 	r600_ring_init(rdev, &rdev->ring[RADEON_RING_TYPE_GFX_INDEX], 1024 * 1024);
 
-	rdev->ring[R600_RING_TYPE_DMA_INDEX].ring_obj = NULL;
-	r600_ring_init(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX], 64 * 1024);
-
 	rdev->ih.ring_obj = NULL;
 	r600_ih_ring_init(rdev, 64 * 1024);
 
@@ -3092,7 +3077,6 @@ int r600_init(struct radeon_device *rdev)
 	if (r) {
 		dev_err(rdev->dev, "disabling GPU acceleration\n");
 		r600_cp_fini(rdev);
-		r600_dma_fini(rdev);
 		r600_irq_fini(rdev);
 		radeon_wb_fini(rdev);
 		radeon_ib_pool_fini(rdev);
@@ -3109,7 +3093,6 @@ void r600_fini(struct radeon_device *rdev)
 	radeon_pm_fini(rdev);
 	r600_audio_fini(rdev);
 	r600_cp_fini(rdev);
-	r600_dma_fini(rdev);
 	r600_irq_fini(rdev);
 	radeon_wb_fini(rdev);
 	radeon_ib_pool_fini(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index a8e3342fd4a..dfb5a1db87d 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -138,7 +138,7 @@ static int radeon_cs_get_ring(struct radeon_cs_parser *p, u32 ring, s32 priority
 				p->ring = R600_RING_TYPE_DMA_INDEX;
 			else
 				p->ring = CAYMAN_RING_TYPE_DMA1_INDEX;
-		} else if (p->rdev->family >= CHIP_R600) {
+		} else if (p->rdev->family >= CHIP_RV770) {
 			p->ring = R600_RING_TYPE_DMA_INDEX;
 		} else {
 			return -EINVAL;