Re: [PATCH v7 6/6] drm/panthor: Bump the driver version to 1.9

["Adrián Larumbe" <adrian.larumbe@collabora.com>]

Hi Jani,

On 15.04.2026 16:54, Jani Nikula wrote:
> On Wed, 15 Apr 2026, Adrián Larumbe <adrian.larumbe@collabora.com> wrote:
> > Bump the driver version to reflect the new MMU info query ioctl
> > parameter and the VM_BIND map sparse flag.
>
> You're not actually bumping the version, just adding to the comment.

Forgot to increase the driver's minor revision number, thanks for the catch.

> Does the version actually work for you for checking stuff? Do you have
> userspace checking it? Should it be some capability thing instead?

We absolutely need it because the UMD must be compatible with previous kernel versions,
which means in the case of sparse mappings, the old method of creating the dummy BO
in user mode and then having the Mesa driver do repeated mappings over it through
successive VM_BIND ioctl's must be available.

> BR,
> Jani.
>
> >
> > Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
> > ---
> >  drivers/gpu/drm/panthor/panthor_drv.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c
> > index a8090bc4e33c..c8fb63ede62c 100644
> > --- a/drivers/gpu/drm/panthor/panthor_drv.c
> > +++ b/drivers/gpu/drm/panthor/panthor_drv.c
> > @@ -1787,6 +1787,8 @@ static void panthor_debugfs_init(struct drm_minor *minor)
> >   *       - adds DRM_IOCTL_PANTHOR_BO_QUERY_INFO ioctl
> >   *       - adds drm_panthor_gpu_info::selected_coherency
> >   * - 1.8 - extends DEV_QUERY_TIMESTAMP_INFO with flags
> > + * - 1.9 - adds DRM_PANTHOR_DEV_QUERY_MMU_INFO query
> > + *       - adds DRM_PANTHOR_VM_BIND_OP_MAP_SPARSE flag
> >   */
> >  static const struct drm_driver panthor_drm_driver = {
> >  	.driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ |
>
> --
> Jani Nikula, Intel

Adrian Larumbe