Re: [PATCH 3/4] drm: nova: Add GETPARAM parameter to read the GPU chipset

[Danilo Krummrich]

On Mon Jul 6, 2026 at 7:34 AM CEST, Alistair Popple wrote:
> @@ -31,7 +31,6 @@ pub(crate) struct Nova<'bound> {
>  
>  /// DRM registration data, accessible from ioctl handlers via the 
> registration guard.
>  pub(crate) struct DrmRegData<'bound> {
> -    #[allow(dead_code)]

Forgot to mention that in the previous patch, please use expect instead.

> @@ -12,11 +12,11 @@
>      types::CovariantForLt, //
>  };
>  
> +use crate::gpu::Chipset;
>  use crate::gpu::Gpu;

Vertical import style.

> @@ -25,6 +25,13 @@ extern "C" {
>   */
>  #define NOVA_GETPARAM_VRAM_BAR_SIZE  0x1
>  
> +/*
> + * NOVA_GETPARAM_GPU_CHIPSET
> + *
> + * Query the GPU chipset architecture/implementation.
> + */
> +#define NOVA_GETPARAM_GPU_CHIPSET    0x2

We could provide an enum for the chipset values and use it in the definition of
nova-core's Chipset type, which guarantees a single source of truth.

        define_chipset!({
            TU102 = uapi::NOVA_CHIPSET_TU102,
            TU104 = uapi::NOVA_CHIPSET_TU104,
            // ...
        });