[PATCH 1/2] pmdomain/rockchip: skip QoS operations for idle-only domains

[Daniel Bozeman <daniel@orb.net>]

Idle-only power domains (pwr_mask == 0) cannot actually be powered
on or off. rockchip_do_pmu_set_power_domain() already returns early
for these domains, but rockchip_pd_power() still attempts QoS save
and idle requests before reaching that check.

On RK3528, the idle-only domains (PD_RKVENC, PD_VO, PD_VPU) have
QoS registers that may be inaccessible when the generic power domain
framework attempts to power them off, leading to synchronous external
aborts.

Return early from rockchip_pd_power() when pwr_mask is zero, matching
the existing guard in rockchip_do_pmu_set_power_domain().

Fixes: 1fe767a56c32 ("soc: rockchip: power-domain: allow domains only handling idle requests")
Signed-off-by: Daniel Bozeman <daniel@orb.net>
---
 drivers/pmdomain/rockchip/pm-domains.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
index 490bbb1d1d..2eecae092a 100644
--- a/drivers/pmdomain/rockchip/pm-domains.c
+++ b/drivers/pmdomain/rockchip/pm-domains.c
@@ -640,6 +640,9 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 	if (rockchip_pmu_domain_is_on(pd) == power_on)
 		return 0;
 
+	if (pd->info->pwr_mask == 0)
+		return 0;
+
 	ret = clk_bulk_enable(pd->num_clks, pd->clks);
 	if (ret < 0) {
 		dev_err(pmu->dev, "failed to enable clocks\n");

base-commit: bc330699801d3b4f99110365512caed5adcfaca3
-- 
2.43.0