[PATCH v3 0/2] Two small perfcnt fixes for Panfrost

[Adrián Larumbe]

To: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
To: Rob Herring <robh@xxxxxxxxxx>
To: Steven Price <steven.price@xxxxxxx>
To: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
To: Maxime Ripard <mripard@xxxxxxxxxx>
To: Thomas Zimmermann <tzimmermann@xxxxxxx>
To: David Airlie <airlied@xxxxxxxxx>
To: Simona Vetter <simona@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>

First fix makes sure cycle counter is enabled when starting a new
session. This is required by some profiling frameworks like
Perfetto. Second fix deals with a recently-introduced race condition.

---
Changes in v3:
- Removed atomic-variable non-equality check altogether.
- Minor commitm messages changes and adding trailers.
- Link to v2: https://patch.msgid.link/20261103-panfrost-reset-races-fixes-v2-0-454207b1d4e3@xxxxxxxxxxxxx

Changes in v2:
- Added review trailers.
- Removed warning from cycle count reference check.
- Link to v1: https://patch.msgid.link/20261015-panfrost-reset-races-fixes-v1-0-bb74c1786a0b@xxxxxxxxxxxxx

To: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
To: Rob Herring <robh@xxxxxxxxxx>
To: Steven Price <steven.price@xxxxxxx>
To: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
To: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
To: Maxime Ripard <mripard@xxxxxxxxxx>
To: Thomas Zimmermann <tzimmermann@xxxxxxx>
To: David Airlie <airlied@xxxxxxxxx>
To: Simona Vetter <simona@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

---
Adrián Larumbe (1):
      drm/panfrost: Fix race when restoring reset state in perfcnt

Boris Brezillon (1):
      drm/panfrost: Enable cycle counting when perfcnt is enabled

 drivers/gpu/drm/panfrost/panfrost_gpu.c     |  7 +++----
 drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 18 ++++++++++--------
 2 files changed, 13 insertions(+), 12 deletions(-)
---
base-commit: 6f7098738fff3ec7393f924343188cb8e6ebc5d2
change-id: 20261014-panfrost-reset-races-fixes-6f5f2459dc9b

Best regards,
--  
Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>