linux-kernel - [PATCH v2 2/4] thermal: power_allocator: respect upper and lower bounds for cooling device

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Message-Id: <20201015112441.4056-3-lukasz.luba@arm.com>
Date:   Thu, 15 Oct 2020 12:24:39 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Cc:     daniel.lezcano@...aro.org, amitk@...nel.org,
        Dietmar.Eggemann@....com, lukasz.luba@....com,
        michael.kao@...iatek.com, rui.zhang@...el.com
Subject: [PATCH v2 2/4] thermal: power_allocator: respect upper and lower bounds for cooling device

The thermal cooling device specified in DT might be instantiated for
a thermal zone trip point with a limited set of OPPs to operate on. This
configuration should be supported by Intelligent Power Allocation (IPA),
since it is a standard for other governors. Change the code and allow IPA
to get power value of lower and upper bound set for a given cooling
device.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 drivers/thermal/gov_power_allocator.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/gov_power_allocator.c b/drivers/thermal/gov_power_allocator.c
index ab0be26f0816..eb8c9afadf19 100644
--- a/drivers/thermal/gov_power_allocator.c
+++ b/drivers/thermal/gov_power_allocator.c
@@ -96,7 +96,10 @@ static u32 estimate_sustainable_power(struct thermal_zone_device *tz)
 		if (instance->trip != params->trip_max_desired_temperature)
 			continue;
 
-		if (power_actor_get_min_power(cdev, &min_power))
+		if (!cdev_is_power_actor(cdev))
+			continue;
+
+		if (cdev->ops->state2power(cdev, instance->upper, &min_power))
 			continue;
 
 		sustainable_power += min_power;
@@ -398,7 +401,8 @@ static int allocate_power(struct thermal_zone_device *tz,
 
 		weighted_req_power[i] = frac_to_int(weight * req_power[i]);
 
-		if (power_actor_get_max_power(cdev, &max_power[i]))
+		if (cdev->ops->state2power(cdev, instance->lower,
+					   &max_power[i]))
 			continue;
 
 		total_req_power += req_power[i];
-- 
2.17.1