On 3/3/25 1:35 PM, Boris Brezillon wrote:
Hi,
This looks like it has been part of a R50 release of the DDK, which is recent
enough to consider it up-to-date. The issues you're seeing with fast resume are
probably due to some integration issues or other quirks.
Boris has the most recent experience with playing with fast resume, maybe
he can share some tips on where to add messages in Panthor to try to debug
your problem.
If you end up with fast_reset=true, that means the FW claims it entered
a suspend state from which is can resume quickly (fast-reset), and in
that case, we're only supposed to power on the L2 block at resume time
AFAIK. If there's a component that can tell us more, it's probably the
FW, unfortunately, it doesn't tell us much through the FW interface,
especially if it's not booting properly. Do you hit this error [1]
without this patch, and if you do, what's the status reported there?
[1]https://elixir.bootlin.com/linux/v6.14-rc4/source/drivers/gpu/drm/panthor/panthor_fw.c#L1051
Sorry for the late reply. I get the following, so I think the status is
"fatal" ?
panthor 4d900000.gpu: [drm] clock rate = 1000000000
panthor 4d900000.gpu: EM: created perf domain
panthor 4d900000.gpu: [drm] mali-g310 id 0xac74 major 0x0 minor 0x0
status 0x1
panthor 4d900000.gpu: [drm] Features: L2:0x7110306 Tiler:0x809 Mem:0x1
MMU:0x2830 AS:0xff
panthor 4d900000.gpu: [drm] shader_present=0x1 l2_present=0x1
tiler_present=0x1
panthor 4d900000.gpu: [drm] Firmware protected mode entry not be
supported, ignoring
panthor 4d900000.gpu: [drm] Firmware git sha:
8e5cfcfec20cc8aff8509d37e72babc935d34a3b
panthor 4d900000.gpu: [drm] CSF FW using interface v1.1.0, Features 0x0
Instrumentation features 0x71
[drm] Initialized panthor 1.3.0 for 4d900000.gpu on minor 0
panthor 4d900000.gpu: [drm] *ERROR* Failed to boot MCU (status=fatal)
panthor 4d900000.gpu: [drm] *ERROR* FW fast reset failed
panthor 4d900000.gpu: [drm] *ERROR* Fast reset failed, trying a slow reset
panthor 4d900000.gpu: [drm] *ERROR* Failed to boot MCU (status=fatal)
panthor 4d900000.gpu: [drm] *ERROR* FW slow reset failed
