linux-kernel - [PATCH] thermal: intel_powerclamp: Return last requested state as cur

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Message-Id: <20230201210712.2170312-1-srinivas.pandruvada@linux.intel.com>
Date:   Wed,  1 Feb 2023 13:07:12 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     rafael@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        daniel.lezcano@...aro.org, rui.zhang@...el.com,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH] thermal: intel_powerclamp: Return last requested state as cur_state

When the user is reading cur_state from the thermal cooling device for
Intel powerclamp device:
- It returns the idle ratio from Package C-state counters when
there is active idle injection session.
- -1, when there is no active idle injection session.

This information is not very useful as the package C-state counters vary
a lot from read to read. Instead just return the last requested cur_state.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
 drivers/thermal/intel/intel_powerclamp.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c
index 2f4cbfdf26a0..72a45cf2708c 100644
--- a/drivers/thermal/intel/intel_powerclamp.c
+++ b/drivers/thermal/intel/intel_powerclamp.c
@@ -590,17 +590,7 @@ static int powerclamp_get_max_state(struct thermal_cooling_device *cdev,
 static int powerclamp_get_cur_state(struct thermal_cooling_device *cdev,
 				 unsigned long *state)
 {
-	if (clamping) {
-		if (poll_pkg_cstate_enable)
-			*state = pkg_cstate_ratio_cur;
-		else
-			*state = set_target_ratio;
-	} else {
-		/* to save power, do not poll idle ratio while not clamping */
-		*state = -1; /* indicates invalid state */
-	}
-
-	return 0;
+	return set_target_ratio;
 }
 
 static int powerclamp_set_cur_state(struct thermal_cooling_device *cdev,
-- 
2.39.1