On Wed, 11 Dec 2024 08:54:14 +0100
Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> wrote:
> Hello,
>
> Here's a collection of patches improving robustness to failures in
> the device resume/suspend path. Those failures are pretty hard to
> reproduce (happens once in a while on a deqp-vk run), so I used a
> mechanism to fake them.
>
> Faking a FW boot failure is kinda tricky though, which means the
> last patch has only been partially tested:
> - the fast reset path is well tested because that's the default on
> a device suspend
> - the slow reset has been tested with a hack replacing fast resets
> by slow resets
> - the fast -> slow reset fallback has been tested by faking boot
> failures after a fast reset, but these are not real, which means
> we can't really validate if the MCU recovers fine after a slow
> reset
>
> On the other hand, this implementation doesn't look like it could
> do more harm than the current one (the only difference is the
> extra GPU soft-reset that happens between the fast and slow FW
> boot).
>
> Nothing major changed in v3. Each patch contains a changelog, if
> you're interested.
>
> Regards,
>
> Boris
>
> Boris Brezillon (5):
> drm/panthor: Preserve the result returned by panthor_fw_resume()
> drm/panthor: Be robust against runtime PM resume failures in the
> suspend path
> drm/panthor: Ignore devfreq_{suspend,resume}_device() failures
> drm/panthor: Be robust against resume failures
> drm/panthor: Fix the fast-reset logic
Queued to drm-misc-next.
>
> drivers/gpu/drm/panthor/panthor_devfreq.c | 12 ++--
> drivers/gpu/drm/panthor/panthor_devfreq.h | 4 +-
> drivers/gpu/drm/panthor/panthor_device.c | 68 ++++++++++-------------
> drivers/gpu/drm/panthor/panthor_device.h | 37 ++++++++++++
> drivers/gpu/drm/panthor/panthor_drv.c | 2 +-
> drivers/gpu/drm/panthor/panthor_fw.c | 68 +++++++----------------
> drivers/gpu/drm/panthor/panthor_gpu.c | 14 +++--
> drivers/gpu/drm/panthor/panthor_mmu.c | 3 +-
> drivers/gpu/drm/panthor/panthor_sched.c | 4 +-
> 9 files changed, 107 insertions(+), 105 deletions(-)
>
