[PATCH] drm/amdgpu/gmc10: adjust gart size for parts that support S/G display

[Christian König]

Am 07.07.22 um 22:55 schrieb Alex Deucher:
> For GMC 10 parts which support scatter/gather display (display
> from system memory), we should allocate a larger gart size
> to better handler larger displays.  This mirrors what we already
> do for GMC 9 parts.
>
> v2: fix typo (Alex)
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

Acked-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c | 17 ++++++++++++++---
>   1 file changed, 14 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> index 25d5743ae91b..1772f006c61a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
> @@ -834,10 +834,21 @@ static int gmc_v10_0_mc_init(struct amdgpu_device *adev)
>   		adev->gmc.visible_vram_size = adev->gmc.real_vram_size;
>   
>   	/* set the gart size */
> -	if (amdgpu_gart_size == -1)
> -		adev->gmc.gart_size = 512ULL << 20;
> -	else
> +	if (amdgpu_gart_size == -1) {
> +		switch (adev->ip_versions[GC_HWIP][0]) {
> +		default:
> +			adev->gmc.gart_size = 512ULL << 20;
> +			break;
> +		case IP_VERSION(10, 3, 1):   /* DCE SG support */
> +		case IP_VERSION(10, 3, 3):   /* DCE SG support */
> +		case IP_VERSION(10, 3, 6):   /* DCE SG support */
> +		case IP_VERSION(10, 3, 7):   /* DCE SG support */
> +			adev->gmc.gart_size = 1024ULL << 20;
> +			break;
> +		}
> +	} else {
>   		adev->gmc.gart_size = (u64)amdgpu_gart_size << 20;
> +	}
>   
>   	gmc_v10_0_vram_gtt_location(adev, &adev->gmc);
>