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| author | Sam Day <me@samcday.com> | 2026-09-26 16:17:13 +1000 |
|---|---|---|
| committer | Rob Clark <robin.clark@oss.qualcomm.com> | 2026-09-27 08:18:22 -0700 |
| commit | b5434691654441448c6d20a8ba887e29d3f81042 (patch) | |
| tree | 14093b2553b180df6a18a625b201a6d4184dc7bf /tools/lib/python/kdoc/python_version.py | |
| parent | 81878aa1a2f551f51a3d3aef2a9509503ec34d8b (diff) | |
drm/msm/a3xx: fix VBIF halt mask for A306/A306A
A306 and A306A implement only three VBIF XIN halt request bits.
Consequently, waiting for the full 6-bit A3xx mask times out and
prevents runtime suspend.
This issue was reproduced on a DragonBoard 410c: the request reads back
as 0x7 and the acknowledgment as 0x00070007 - the poll eventually
returns -ETIMEDOUT, and a3xx_pm_suspend fails with -EBUSY.
The downstream kgsl driver corroborates this (see link). Since the
single-character difference between A3XX_VBIF_XIN_HALT_CTRL0_MASK and
A30X_VBIF_XIN_HALT_CTRL0_MASK could be confusing to read, the narrowed
GENMASK is instead defined inline in a3xx_vbif_halt().
Fixes: be0e82b8e0c9 ("drm/msm/a3xx: Drain VBIF before GPU suspend")
Link: https://android.googlesource.com/kernel/msm/+/c90c7feeca2f5839ad6824f816c0bd207602a2f4/drivers/gpu/msm/adreno_a3xx.c#637
Assisted-by: LLM
Signed-off-by: Sam Day <me@samcday.com>
Patchwork: https://patchwork.freedesktop.org/patch/756513/
Message-ID: <20260926-a306-vbif-mask-v1-1-2bae5e81c05a@samcday.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions