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SubjectRe: [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@samsung.com>
> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.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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