[PATCH v3 03/14] drm/panthor: Add the device logical block

[Boris Brezillon]

On Thu, 7 Dec 2023 09:12:43 +0100
Boris Brezillon <boris.brezillon at collabora.com> wrote:

> On Wed, 6 Dec 2023 16:55:42 +0000
> Steven Price <steven.price at arm.com> wrote:
> 
> > On 04/12/2023 17:32, Boris Brezillon wrote:  
> > > The panthor driver is designed in a modular way, where each logical
> > > block is dealing with a specific HW-block or software feature. In order
> > > for those blocks to communicate with each other, we need a central
> > > panthor_device collecting all the blocks, and exposing some common
> > > features, like interrupt handling, power management, reset, ...
> > > 
> > > This what this panthor_device logical block is about.
> > > 
> > > v3:
> > > - Add acks for the MIT+GPL2 relicensing
> > > - Fix 32-bit support
> > > - Shorten the sections protected by panthor_device::pm::mmio_lock to fix
> > >   lock ordering issues.
> > > - Rename panthor_device::pm::lock into panthor_device::pm::mmio_lock to
> > >   better reflect what this lock is protecting
> > > - Use dev_err_probe()
> > > - Make sure we call drm_dev_exit() when something fails half-way in
> > >   panthor_device_reset_work()
> > > - Replace CSF_GPU_LATEST_FLUSH_ID_DEFAULT with a constant '1' and a
> > >   comment to explain. Also remove setting the dummy flush ID on suspend.
> > > - Remove drm_WARN_ON() in panthor_exception_name()
> > > - Check pirq->suspended in panthor_xxx_irq_raw_handler()
> > > 
> > > Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
> > > Signed-off-by: Steven Price <steven.price at arm.com>
> > > Acked-by: Steven Price <steven.price at arm.com> # MIT+GPL2 relicensing,Arm
> > > Acked-by: Grant Likely <grant.likely at linaro.org> # MIT+GPL2 relicensing,Linaro
> > > Acked-by: Boris Brezillon <boris.brezillon at collabora.com> # MIT+GPL2 relicensing,Collabora    
> > 
> > We still have the "FIXME: this is racy"  
> 
> Yeah, I still didn't find a proper solution for that.

This [1] should fix the race condition in the unplug path.

[1]https://gitlab.freedesktop.org/panfrost/linux/-/commit/b79b28069e524ae7fea22a9a158b870eab2d5f9a