[PATCH 0/4] drm/panfrost: Plumb cycle counters to userspace

[Alyssa Rosenzweig]

Hi Tomeu,

> Will this be enough to implement GL_TIMESTAMP and GL_TIME_ELAPSED queries?
> 
> Guess the DDK implements these as WRITE_VALUE jobs, and there's also a soft
> job BASE_JD_REQ_SOFT_DUMP_CPU_GPU_TIME that I guess is used for
> glGet*(GL_TIMESTAMP). Other DRM drivers use an ioctl for that instead.

For anything implemented as WRITE_VALUE jobs, this is necessary and
sufficient on the kernel side. If an out-of-band soft job or ioctl is
truly needed (I haven't looked), of course that needs additional piping.

Thanks,

Alyssa