[PATCH] msm/gpu/a6xx: Force of_dma_configure to setup DMA for GMU

Jordan Crouse jcrouse at codeaurora.org
Fri Sep 14 15:03:46 UTC 2018

The point of the 'force_dma' parameter for of_dma_configure
is to force the device to be set up even if DMA capability is
not described by the firmware which is exactly the use case
 we have for GMU - we need SMMU to get set up but we have no
other dma capabilities since memory is managed by the GPU
driver. Currently we pass false so of_dma_configure() fails
and subsequently GMU and GPU probe does as well.

Fixes: 4b565ca5a2c ("drm/msm: Add A6XX device support")
Signed-off-by: Jordan Crouse <jcrouse at codeaurora.org>
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index bbb8126ec5c5..cbaca366fc20 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -1140,7 +1140,7 @@ int a6xx_gmu_probe(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 	gmu->dev = &pdev->dev;
-	of_dma_configure(gmu->dev, node, false);
+	of_dma_configure(gmu->dev, node, true);
 	/* Fow now, don't do anything fancy until we get our feet under us */
 	gmu->idle_level = GMU_IDLE_STATE_ACTIVE;

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