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drm/panfrost: Avoid cache flush after perfcnt sample in fully coherent systems

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If the GPU and CPU are fully coherent, then there's no need to flush the
GPU caches after a perfcnt sample is made available.

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patch.msgid.link/20261012-claude-fixes-v15-13-bc0a6c498553@collabora.com
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
This commit is contained in:
Adrián Larumbe 2026-10-12 15:48:05 +01:00
parent 711a34a56d
commit 9373cdddb5
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/panfrost/panfrost_perfcnt.c
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@ -52,7 +52,10 @@ void panfrost_perfcnt_clean_cache_done(struct panfrost_device *pfdev)
void panfrost_perfcnt_sample_done(struct panfrost_device *pfdev)
{
gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES);
if (pfdev->features.selected_coherency != COHERENCY_ACE)
gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES);
else
complete(&pfdev->perfcnt->dump_comp);
}
static int panfrost_perfcnt_dump_locked(struct panfrost_device *pfdev)