thermal: intel: intel_pch: Improve cooling log

JIRA: https://issues.redhat.com/browse/RHEL-79821



commit 68de0ae4d6b5ea675b835e4a6b00f52a26cd7f0c
Author: Zhang Rui <rui.zhang@intel.com>
Date:   Thu May 30 23:17:04 2024 +0800

    thermal: intel: intel_pch: Improve cooling log

    The intel_pch_thermal cooling mechanism currently only provides one of
    the following final conclusions:
    1. intel_pch_thermal 0000:00:12.0: CPU-PCH is cool [48C]
    2. intel_pch_thermal 0000:00:12.0: CPU-PCH is cool [49C] after 30700 ms delay
    3. intel_pch_thermal 0000:00:12.0: CPU-PCH is hot [60C] after 60000 ms delay. S0ix might fail
    4. intel_pch_thermal 0000:00:12.0: Wakeup event detected, abort cooling

    This does not provide sufficient context about what is happening,
    especially for case 4.

    Add one line log to indicate when PCH overheats and the cooling delay
    has started.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: David Arcari <darcari@redhat.com>

drivers/thermal/intel/intel_pch_thermal.c

@@ -298,6 +298,11 @@ static int intel_pch_thermal_suspend_noirq(struct device *device)
 	/* Get the PCH current temperature value */
 	pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP));
 
+	if (pch_cur_temp >= pch_thr_temp)
+		dev_warn(&ptd->pdev->dev,
+			"CPU-PCH current temp [%dC] higher than the threshold temp [%dC], S0ix might fail. Start cooling...\n",
+			pch_cur_temp, pch_thr_temp);
+
 	/*
 	 * If current PCH temperature is higher than configured PCH threshold
 	 * value, run some delay loop with sleep to let the current temperature