[PATCH v2 04/11] drm/msm: adreno: add GMU_BW_VOTE feature flag

[Rob Clark]

On Tue, Nov 19, 2024 at 9:56 AM Neil Armstrong
<neil.armstrong at linaro.org> wrote:
>
> The Adreno GMU Management Unit (GNU) can also scale the DDR Bandwidth

nit, s/GNU/GMU/

> along the Frequency and Power Domain level, but by default we leave the
> OPP core vote for the interconnect ddr path.
>
> While scaling via the interconnect path was sufficient, newer GPUs
> like the A750 requires specific vote paremeters and bandwidth to
> achieve full functionality.
>
> While the feature will require some data in a6xx_info, it's safer
> to only enable tested platforms with this flag first.
>
> Add a new feature enabling DDR Bandwidth vote via GMU.
>
> Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
> ---
>  drivers/gpu/drm/msm/adreno/adreno_gpu.h | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index 4702d4cfca3b58fb3cbb25cb6805f1c19be2ebcb..394b96eb6c83354ae008b15b562bedb96cd391dd 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -58,6 +58,7 @@ enum adreno_family {
>  #define ADRENO_FEAT_HAS_HW_APRIV               BIT(0)
>  #define ADRENO_FEAT_HAS_CACHED_COHERENT                BIT(1)
>  #define ADRENO_FEAT_PREEMPTION                 BIT(2)
> +#define ADRENO_FEAT_GMU_BW_VOTE                        BIT(3)
>
>  /* Helper for formating the chip_id in the way that userspace tools like
>   * crashdec expect.
>
> --
> 2.34.1
>