drm/msm/a3xx: Add hangcheck progress detection

A3xx has no progress callback, so the hangcheck declares a lockup as soon
as a submit is still running when the timer expires, no matter whether
the CP is advancing. On A306 a piglit tex-miplevel-selection run is a
single submit of about 58k draws that takes 1.2-1.3 s to complete, and it
gets reset partway through on every run. With the hangcheck period raised
to 10 s the same runs pass without a hang.

Compare the CP IB1/IB2 base and remaining size between timer expirations,
like a6xx does. On A306 these move on every 20 ms sample while such a
submit executes and read zero when idle. The prefetch queues are small
(32 and 64 for IB1 and IB2), so buffered data does not hide progress for
long.

Assisted-by: LLM
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/757301/
Message-ID: <20260930-adreno-progress-v2-2-3882f0fcd7b4@oss.qualcomm.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

0 files changed, 0 insertions, 0 deletions