linux/drivers/accel
Jacek Lawrynowicz 28083ff18d accel/ivpu: Fix DevTLB errors on suspend/resume and recovery
Issue IP reset before shutdown in order to
complete all upstream requests to the SOC.
Without this DevTLB is complaining about
incomplete transactions and NPU cannot resume from
suspend.
This problem is only happening on recent IFWI
releases.

IP reset in rare corner cases can mess up PCI
configuration, so save it before the reset.
After this happens it is also impossible to
issue PLL requests and D0->D3->D0 cycle is needed
to recover the NPU. Add WP 0 request on power up,
so the PUNIT is always notified about NPU reset.

Use D0/D3 cycle for recovery as it can recover
from failed IP reset and FLR cannot.

Fixes: 3f7c063492 ("accel/ivpu/37xx: Fix hangs related to MMIO reset")
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240207102446.3126981-1-jacek.lawrynowicz@linux.intel.com
2024-02-12 09:00:44 +01:00
..
habanalabs drm-next for 6.8: 2024-01-12 11:32:19 -08:00
ivpu accel/ivpu: Fix DevTLB errors on suspend/resume and recovery 2024-02-12 09:00:44 +01:00
qaic drm-next for 6.8: 2024-01-12 11:32:19 -08:00
drm_accel.c accel: Include <drm/drm_auth.h> 2023-12-06 10:08:09 +01:00
Kconfig accel/qaic: Add qaic driver to the build system 2023-04-06 08:23:03 +02:00
Makefile accel/qaic: Add qaic driver to the build system 2023-04-06 08:23:03 +02:00