[PATCH v3 5/7] drm/msm: adreno: enable GMU bandwidth for A740 and A750

[Konrad Dybcio]

On 28.11.2024 11:25 AM, Neil Armstrong wrote:
> Now all the DDR bandwidth voting via the GPU Management Unit (GMU)
> is in place, declare the Bus Control Modules (BCMs) and the
> corresponding parameters in the GPU info struct and add the
> GMU_BW_VOTE feature bit to enable it.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_catalog.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
> index 0c560e84ad5a53bb4e8a49ba4e153ce9cf33f7ae..edffb7737a97b268bb2986d557969e651988a344 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
> @@ -1388,6 +1388,17 @@ static const struct adreno_info a7xx_gpus[] = {
>  			.pwrup_reglist = &a7xx_pwrup_reglist,
>  			.gmu_chipid = 0x7020100,
>  			.gmu_cgc_mode = 0x00020202,
> +			.bcms = (const struct a6xx_bcm[]) {
> +				{ .name = "SH0", .buswidth = 16 },
> +				{ .name = "MC0", .buswidth = 4 },
> +				{
> +					.name = "ACV",
> +					.fixed = true,
> +					.perfmode = BIT(3),
> +					.perfmode_bw = 16500000,
> +				},
> +				{ /* sentinel */ },
> +			},

This is not going to fly the second there's two SoCs implementing the
same GPU with a difference in bus topology. I think we could add
something like drvdata to ICC nodes and use it for BCMs on icc-rpmh.
Then, we could retrieve it from the interconnect path we get from the
dt node. It would also reduce duplication.

Konrad