linux-kernel - Re: [PATCH v10 7/7] thermal:exynos:boost: Automatic enable/disable of BOOST feature (at Exynos4412)

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Message-id: <20131128140525.4026442d@amdc2363>
Date:	Thu, 28 Nov 2013 14:05:25 +0100
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <eduardo.valentin@...com>
Cc:	Lukasz Majewski <l.majewski@...sung.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>, durgadoss.r@...el.com,
	Amit Daniel Kachhap <amit.daniel@...sung.com>
Subject: Re: [PATCH v10 7/7] thermal:exynos:boost: Automatic enable/disable of
 BOOST feature (at Exynos4412)

Hi Eduardo, Zhang,

> This patch provides auto disable/enable operation for boost. It uses
> already present thermal infrastructure to provide boost hysteresis.
> A special set of TMU data has been defined for Exynos4412, which is
> only considered when BOOST is enabled.
> 
> Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
> 
> ---
> Changes for v10:
>     - Remove boost related code from thermal_core.c
>     - Use already present thermal infrastructure to provide thermal
> hysteresis
>     - Introduce special set of TMU data for BOOST


Eduardo, Zhang any comments on this patch?



> 
> Changes for v9:
>     - None
> 
> Changes for v8:
>     - Move cpufreq_boost_* stub functions definition (needed when
> cpufreq is not compiled in) to cpufreq.h at cpufreq core support
> commit
> 
> Changes for v7:
>     - None
> 
> Changes for v6:
>     - Disable boost only when supported and enabled
>     - Protect boost related thermal_zone_device struct fields with
> mutex
>     - Evaluate temperature trend during boost enable decision
>     - Create separate methods to handle boost enable/disable
>       (thermal_boost_{enable|disable}) operations
>     - Boost is disabled at any trip point passage (not only the non
> critical one)
>     - Add stub definitions for cpufreq boost functions used when
>       CONFIG_CPU_FREQ is NOT defined.
> 
> Changes for v5:
>     - Move boost disable code from cpu_cooling.c to thermal_core.c
>       (to handle_non_critical_trips)
>     - Extent struct thermal_zone_device by adding overheated bool flag
>     - Implement auto enable of boost after device cools down
>     - Introduce boost_polling flag, which indicates if thermal uses
> it's predefined pool delay or has woken up thermal workqueue only to
> wait until device cools down.
> 
> Changes for v4:
>     - New patch
> 
>  drivers/thermal/samsung/exynos_tmu_data.c |   47
> +++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+)
> 
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c
> b/drivers/thermal/samsung/exynos_tmu_data.c index 073c292..9346926
> 100644 --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -167,13 +167,60 @@ static const struct exynos_tmu_registers
> exynos4412_tmu_registers = { .features = (TMU_SUPPORT_EMULATION |
> TMU_SUPPORT_TRIM_RELOAD | \ TMU_SUPPORT_FALLING_TRIP |
> TMU_SUPPORT_READY_STATUS | \ TMU_SUPPORT_EMUL_TIME)
> +
> +#define EXYNOS4412_TMU_DATA_BOOST \
> +	.threshold_falling = 10, \
> +	.trigger_levels[0] = 70, \
> +	.trigger_levels[1] = 85, \
> +	.trigger_levels[2] = 103, \
> +	.trigger_levels[3] = 110, \
> +	.trigger_enable[0] = true, \
> +	.trigger_enable[1] = true, \
> +	.trigger_enable[2] = true, \
> +	.trigger_enable[3] = true, \
> +	.trigger_type[0] = THROTTLE_ACTIVE, \
> +	.trigger_type[1] = THROTTLE_ACTIVE, \
> +	.trigger_type[2] = THROTTLE_ACTIVE, \
> +	.trigger_type[3] = SW_TRIP, \
> +	.max_trigger_level = 4, \
> +	.gain = 8, \
> +	.reference_voltage = 16, \
> +	.noise_cancel_mode = 4, \
> +	.cal_type = TYPE_ONE_POINT_TRIMMING, \
> +	.efuse_value = 55, \
> +	.min_efuse_value = 40, \
> +	.max_efuse_value = 100, \
> +	.first_point_trim = 25, \
> +	.second_point_trim = 85, \
> +	.default_temp_offset = 50, \
> +	.freq_tab[0] = { \
> +		.freq_clip_max = 1400 * 1000, \
> +		.temp_level = 70, \
> +	}, \
> +	.freq_tab[1] = { \
> +		.freq_clip_max = 800 * 1000, \
> +		.temp_level = 85, \
> +	}, \
> +	.freq_tab[2] = { \
> +		.freq_clip_max = 200 * 1000, \
> +		.temp_level = 103, \
> +	}, \
> +	.freq_tab_count = 3, \
> +	.registers = &exynos4412_tmu_registers, \
> +	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD
> | \
> +			TMU_SUPPORT_FALLING_TRIP |
> TMU_SUPPORT_READY_STATUS | \
> +			TMU_SUPPORT_EMUL_TIME)
>  #endif
>  
>  #if defined(CONFIG_SOC_EXYNOS4412)
>  struct exynos_tmu_init_data const exynos4412_default_tmu_data = {
>  	.tmu_data = {
>  		{
> +#ifdef CONFIG_CPU_FREQ_BOOST_SW
> +			EXYNOS4412_TMU_DATA_BOOST,
> +#else
>  			EXYNOS4412_TMU_DATA,
> +#endif
>  			.type = SOC_ARCH_EXYNOS4412,
>  			.test_mux = EXYNOS4412_MUX_ADDR_VALUE,
>  		},
-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group

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