Re: [RFC 3/8] thermal: Store thermal mode in a dedicated enum

From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: linux-pm@vger.kernel.org, Zhang Rui <rui.zhang@intel.com>,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Len Brown <lenb@kernel.org>, Jiri Pirko <jiri@mellanox.com>,
	Ido Schimmel <idosch@mellanox.com>,
	"David S . Miller" <davem@davemloft.net>,
	Peter Kaestle <peter@piie.net>,
	Darren Hart <dvhart@infradead.org>,
	Andy Shevchenko <andy@infradead.org>,
	Support Opensource <support.opensource@diasemi.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amit.kucheria@verdurent.com>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	Allison Randal <allison@lohutok.net>,
	Enrico Weigelt <info@metux.net>,
	Gayatri Kammela <gayatri.kammela@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-acpi@vger.kernel.org, netdev@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, kernel@collabora.com
Subject: Re: [RFC 3/8] thermal: Store thermal mode in a dedicated enum
Date: Wed, 15 Apr 2020 12:09:43 +0200
Message-ID: <4085ca11-5060-c786-93af-f77d6f5d6e60@samsung.com> (raw)
In-Reply-To: <20200407174926.23971-4-andrzej.p@collabora.com>

On 4/7/20 7:49 PM, Andrzej Pietrasiewicz wrote:
> Prepare for adding THERMAL_DEVICE_INITIAL mode.
> 
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
> ---
>  drivers/acpi/thermal.c                        | 27 +++++++++----------
>  drivers/platform/x86/acerhdf.c                | 12 ++++++---
>  .../intel/int340x_thermal/int3400_thermal.c   | 18 +++++--------
>  3 files changed, 27 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 19067a5e5293..a93b0412dd6b 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -172,7 +172,7 @@ struct acpi_thermal {
>  	struct acpi_thermal_trips trips;
>  	struct acpi_handle_list devices;
>  	struct thermal_zone_device *thermal_zone;
> -	int tz_enabled;
> +	enum thermal_device_mode mode;
>  	int kelvin_offset;	/* in millidegrees */
>  	struct work_struct thermal_check_work;
>  };
> @@ -500,7 +500,7 @@ static void acpi_thermal_check(void *data)
>  {
>  	struct acpi_thermal *tz = data;
>  
> -	if (!tz->tz_enabled)
> +	if (tz->mode != THERMAL_DEVICE_ENABLED)
>  		return;
>  
>  	thermal_zone_device_update(tz->thermal_zone,
> @@ -534,8 +534,7 @@ static int thermal_get_mode(struct thermal_zone_device *thermal,
>  	if (!tz)
>  		return -EINVAL;
>  
> -	*mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
> -		THERMAL_DEVICE_DISABLED;
> +	*mode = tz->mode;
>  
>  	return 0;
>  }
> @@ -544,27 +543,25 @@ static int thermal_set_mode(struct thermal_zone_device *thermal,
>  				enum thermal_device_mode mode)
>  {
>  	struct acpi_thermal *tz = thermal->devdata;
> -	int enable;
>  
>  	if (!tz)
>  		return -EINVAL;
>  
> +	if (mode != THERMAL_DEVICE_DISABLED &&
> +	    mode != THERMAL_DEVICE_ENABLED)
> +		return -EINVAL;
>  	/*
>  	 * enable/disable thermal management from ACPI thermal driver
>  	 */
> -	if (mode == THERMAL_DEVICE_ENABLED)
> -		enable = 1;
> -	else if (mode == THERMAL_DEVICE_DISABLED) {
> -		enable = 0;
> +	if (mode == THERMAL_DEVICE_DISABLED)
>  		pr_warn("thermal zone will be disabled\n");
> -	} else
> -		return -EINVAL;
>  
> -	if (enable != tz->tz_enabled) {
> -		tz->tz_enabled = enable;
> +	if (mode != tz->mode) {
> +		tz->mode = mode;
>  		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
>  			"%s kernel ACPI thermal control\n",
> -			tz->tz_enabled ? "Enable" : "Disable"));
> +			tz->mode == THERMAL_DEVICE_ENABLED ?
> +			"Enable" : "Disable"));
>  		acpi_thermal_check(tz);
>  	}
>  	return 0;
> @@ -913,7 +910,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
>  	if (ACPI_FAILURE(status))
>  		return -ENODEV;
>  
> -	tz->tz_enabled = 1;
> +	tz->mode = THERMAL_DEVICE_ENABLED;
>  
>  	dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
>  		 tz->thermal_zone->id);
> diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
> index d5188c1d688b..87e357017d4a 100644
> --- a/drivers/platform/x86/acerhdf.c
> +++ b/drivers/platform/x86/acerhdf.c
> @@ -65,8 +65,10 @@
>  
>  #ifdef START_IN_KERNEL_MODE
>  static int kernelmode = 1;
> +static enum thermal_device_mode thermal_mode = THERMAL_DEVICE_ENABLED;
>  #else
>  static int kernelmode;
> +static enum thermal_device_mode thermal_mode = THERMAL_DEVICE_DISABLED;
>  #endif
>  
>  static unsigned int interval = 10;
> @@ -416,8 +418,7 @@ static int acerhdf_get_mode(struct thermal_zone_device *thermal,
>  	if (verbose)
>  		pr_notice("kernel mode fan control %d\n", kernelmode);
>  
> -	*mode = (kernelmode) ? THERMAL_DEVICE_ENABLED
> -			     : THERMAL_DEVICE_DISABLED;
> +	*mode = thermal_mode;
>  
>  	return 0;
>  }
> @@ -435,10 +436,13 @@ static int acerhdf_set_mode(struct thermal_zone_device *thermal,
>  	    mode != THERMAL_DEVICE_ENABLED)
>  		return -EINVAL;
>  
> -	if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
> +	if (mode == THERMAL_DEVICE_DISABLED && kernelmode) {
>  		acerhdf_revert_to_bios_mode();
> -	else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
> +		thermal_mode = THERMAL_DEVICE_DISABLED;
> +	} else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode) {
>  		acerhdf_enable_kernelmode();
> +		thermal_mode = THERMAL_DEVICE_ENABLED;
> +	}
>  
>  	return 0;
>  }

The conversion missed:

* handling of "force_bios" and force_product" kernel parameters:

	if (force_bios[0]) {
		version = force_bios;
		pr_info("forcing BIOS version: %s\n", version);
		kernelmode = 0;
	}

	if (force_product[0]) {
		product = force_product;
		pr_info("forcing BIOS product: %s\n", product);
		kernelmode = 0;
	}

* acerhdf_revert_to_bios_mode() call on error in acerhdf_set_cur_state()

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> index 634b943e9e3d..fcbd1b14fa74 100644
> --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> @@ -44,7 +44,7 @@ static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
>  struct int3400_thermal_priv {
>  	struct acpi_device *adev;
>  	struct thermal_zone_device *thermal;
> -	int mode;
> +	enum thermal_device_mode mode;
>  	int art_count;
>  	struct art *arts;
>  	int trt_count;
> @@ -247,24 +247,20 @@ static int int3400_thermal_set_mode(struct thermal_zone_device *thermal,
>  				enum thermal_device_mode mode)
>  {
>  	struct int3400_thermal_priv *priv = thermal->devdata;
> -	bool enable;
>  	int result = 0;
>  
>  	if (!priv)
>  		return -EINVAL;
>  
> -	if (mode == THERMAL_DEVICE_ENABLED)
> -		enable = true;
> -	else if (mode == THERMAL_DEVICE_DISABLED)
> -		enable = false;
> -	else
> +	if (mode != THERMAL_DEVICE_ENABLED &&
> +	    mode != THERMAL_DEVICE_DISABLED)
>  		return -EINVAL;
>  
> -	if (enable != priv->mode) {
> -		priv->mode = enable;
> +	if (mode != priv->mode) {
> +		priv->mode = mode;
>  		result = int3400_thermal_run_osc(priv->adev->handle,
> -						 priv->current_uuid_index,
> -						 enable);
> +						priv->current_uuid_index,
> +						mode == THERMAL_DEVICE_ENABLED);
>  	}
>  	return result;
>  }
> 