From: Sibi Sankar <sibis-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
To: Jordan Crouse <jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
robdclark-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
linux-arm-msm-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: [PATCH] msm/gpu/a6xx: Force of_dma_configure to setup DMA for GMU
Date: Fri, 14 Sep 2018 21:48:05 +0530 [thread overview]
Message-ID: <1b3910a65cbc7ea779bac0455af473be@codeaurora.org> (raw)
In-Reply-To: <20180914150346.9340-1-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Tested-by: Sibi Sankar <sibis@codeaurora.org>
On 2018-09-14 20:33, Jordan Crouse wrote:
> 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@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;
--
-- Sibi Sankar --
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
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prev parent reply other threads:[~2018-09-14 16:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-14 15:03 [PATCH] msm/gpu/a6xx: Force of_dma_configure to setup DMA for GMU Jordan Crouse
[not found] ` <20180914150346.9340-1-jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-09-14 16:18 ` Sibi Sankar [this message]
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