Re: [PATCH 7/7] drm/msm/A6xx: Enable preemption for A7xx targets

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On Thu, Aug 15, 2024 at 08:26:17PM +0200, Antonino Maniscalco wrote:
> Initialize with 4 rings to enable preemption.
> 
> Signed-off-by: Antonino Maniscalco <antomani103@xxxxxxxxx>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 86357016db8d..dfcbe08f2161 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -2598,7 +2598,7 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
>  	}
>  
>  	if (is_a7xx)
> -		ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs_a7xx, 1);
> +		ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs_a7xx, 4);

Ideally, we should test each a7x target before enabling preemption
support. We don't know for sure if the save-restore list is accurate or the firmware
used has all the necessary support for preemption.

-Akhil.

>  	else if (adreno_has_gmu_wrapper(adreno_gpu))
>  		ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs_gmuwrapper, 1);
>  	else
> 
> -- 
> 2.46.0
> 
> 




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