Re: [PATCH 16/16] drm/msm/adreno: Expose a PARAM to check AQE support

Dmitry Baryshkov
2026-03-23T21:36:33Z

On Tue, Mar 24, 2026 at 01:42:28AM +0530, Akhil P Oommen wrote:
> AQE (Applicaton Qrisc Engine) is required to support VK ray-pipeline. Two
> conditions should be met to use this HW:
> 1. AQE firmware should be loaded and programmed
> 2. Preemption support
>
> Expose a new MSM_PARAM to allow userspace to query its support.
>
> Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 13 +++++++++++++
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 4 ++++
> drivers/gpu/drm/msm/adreno/adreno_gpu.h | 1 +
> include/uapi/drm/msm_drm.h | 1 +
> 4 files changed, 19 insertions(+)
>
> diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
> index 5c67294edc95..b99098792371 100644
> --- a/include/uapi/drm/msm_drm.h
> +++ b/include/uapi/drm/msm_drm.h
> @@ -117,6 +117,7 @@ struct drm_msm_timespec {
> * ioctl will throw -EPIPE.
> */
> #define MSM_PARAM_EN_VM_BIND 0x16 /* WO, once */
> +#define MSM_PARAM_AQE 0x17 /* RO */
>
> /* For backwards compat. The original support for preemption was based on
> * a single ring per priority level so # of priority levels equals the #
>

I think this also requires a version bump in msm_drv.c

--
With best wishes
Dmitry