[PATCH RFC 10/13] drm/msm: initialize LPAC ring

[Konrad Dybcio]

On 7/5/26 9:13 PM, Anna Maniscalco wrote:
> Program all the register needed to start up LPAC and send initialization
> sequence.
> 
> Additionally, now that the LPAC ring is live, make the code aware of it.
> 
> Signed-off-by: Anna Maniscalco <anna.maniscalco2000 at gmail.com>
> ---

I believe some/all of these writes need to be guarded by if (has_lpac),
as many GPUs lack these registers and there may be side effects on
others


[...]

>  		a6xx_gpu->shadow = msm_gem_kernel_new(gpu->dev,
> -						      sizeof(u32) * gpu->nr_rings,
> +						      sizeof(u32) * (gpu->nr_rings + !!gpu->lpac_rb),

Should we rename nr_rings to something like nr_XXX_rings
where XXX is some uarch-generic (i.e. not SQE because we also
support pre-a6xx) name for the main number cruncher?

Konrad