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[v3,0/2] Add support for _TFP and change throttle pctg

Message ID 20231006153612.5851-1-sumitg@nvidia.com
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Series Add support for _TFP and change throttle pctg | expand

Message

Sumit Gupta Oct. 6, 2023, 3:36 p.m. UTC 
This patch set adds two improvements to get a finer control over the
impact of thermal throttling on performance.

 1) Patch 1: Adds support to read "Thermal fast Sampling Period (_TFP)"
    ACPI object and use it over "Thermal Sampling Period (_TSP)" for
    Passive cooling if both are present.

 2) Patch 2: Adds support to reduce the CPUFREQ reduction percentage
    and not always cause throttling in steps of "20%" for Tegra241 SoC.

Both patches can be applied independently.

---
v2[2] -> v3:
- Patch1: rebased on top of linux-next.
- Patch2: use __read_mostly for the cpufreq_thermal_* variables.
	: add static to new function acpi_thermal_cpufreq_config_nvidia.
	: add null function if CONFIG_HAVE_ARM_SMCCC_DISCOVERY undefined 
	: removed redundant parenthesis.

v1[1] -> v2:
- Patch1: add ACPI spec section info in commit description and rebased.
- Patch2: add info about hardware in the commit description.
	: switched CPUFREQ THERMAL tuning macros to static variables.
	: update the tunings for Tegra241 SoC only using soc_id check.

Jeff Brasen (1):
  ACPI: thermal: Add Thermal fast Sampling Period (_TFP) support

Srikar Srimath Tirumala (1):
  ACPI: processor: reduce CPUFREQ thermal reduction pctg for Tegra241

 drivers/acpi/processor_thermal.c | 43 +++++++++++++++++++++++++++++---
 drivers/acpi/thermal.c           | 17 ++++++++-----
 2 files changed, 51 insertions(+), 9 deletions(-)

[2] https://lore.kernel.org/lkml/20230913164659.9345-1-sumitg@nvidia.com/ 
[1] https://lore.kernel.org/lkml/20230817093011.1378-1-sumitg@nvidia.com/