From: Ye Zhang ye.zhang@rock-chips.com
The issue occurs when the devfreq cooling device uses the EM power model and the get_real_power() callback is provided by the driver.
The EM power table is sorted ascending，can't index the table by cooling device state，so convert cooling state to performance state by dfc->max_state - dfc->capped_state.
Fixes: 615510fe13bd ("thermal: devfreq_cooling: remove old power model and use EM") Cc: 5.11+ stable@vger.kernel.org # 5.11+ Signed-off-by: Ye Zhang ye.zhang@rock-chips.com Reviewed-by: Dhruva Gole d-gole@ti.com Reviewed-by: Lukasz Luba lukasz.luba@arm.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Lukasz Luba lukasz.luba@arm.com ---
Hi Greg,
I have solved small backporting conflict to that v5.15. The patch is based on tag v5.15.99 and it's for this failing backport: https://lore.kernel.org/stable/2024033050-imitation-unmixed-ef53@gregkh/
Regards, Lukasz Luba
drivers/thermal/devfreq_cooling.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c index d38a80adec733..5be79b5d788e5 100644 --- a/drivers/thermal/devfreq_cooling.c +++ b/drivers/thermal/devfreq_cooling.c @@ -199,7 +199,7 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd
res = dfc->power_ops->get_real_power(df, power, freq, voltage); if (!res) { - state = dfc->capped_state; + state = dfc->max_state - dfc->capped_state; dfc->res_util = dfc->em_pd->table[state].power; dfc->res_util *= SCALE_ERROR_MITIGATION;