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drm/v3d: Clean caches before runtime suspend

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On runtime suspend, clean the V3D caches before suspending so all dirty
lines are written back to memory before the power domain is shut down.

Fixes several system hangs reported in [1][2][3].

Closes: https://github.com/raspberrypi/linux/issues/7381 [1]
Closes: https://github.com/raspberrypi/linux/issues/7396 [2]
Closes: https://github.com/raspberrypi/linux/issues/7397 [3]
Fixes: 458f2a712a ("drm/v3d: Introduce Runtime Power Management")
Link: https://patch.msgid.link/20260530-v3d-fix-rpi4-freezes-v1-3-c2c8307da6ce@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Maíra Canal 2026-05-30 15:37:44 -03:00
parent 257adf5ea6
commit b81e8b02e8
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GPG Key ID: 3FF30E8A7688FAAA
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/v3d/v3d_power.c
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@ -52,6 +52,8 @@ int v3d_power_suspend(struct device *dev)
v3d_irq_disable(v3d);
v3d_clean_caches(v3d);
ret = v3d_suspend_sms(v3d);
if (ret) {
v3d_irq_enable(v3d);