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.
---
v3[3] -> 4:
- Patch 2: move ARM code from generic to new file 'thermal_cpufreq.c'.
: get 'cpufreq_thermal_pctg' value for Tegra241 from new file.
: move dummy/null function to 'acpi.h'.
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/arm64/Makefile | 1 +
drivers/acpi/arm64/thermal_cpufreq.c | 20 ++++++++++++++++
drivers/acpi/processor_thermal.c | 35 +++++++++++++++++++++++++---
drivers/acpi/thermal.c | 17 +++++++++-----
include/linux/acpi.h | 9 +++++++
5 files changed, 73 insertions(+), 9 deletions(-)
create mode 100644 drivers/acpi/arm64/thermal_cpufreq.c
[3] https://lore.kernel.org/linux-acpi/20231006153612.5851-1-sumitg@xxxxxxxxxx/
[2] https://lore.kernel.org/lkml/20230913164659.9345-1-sumitg@xxxxxxxxxx/
[1] https://lore.kernel.org/lkml/20230817093011.1378-1-sumitg@xxxxxxxxxx/
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2.17.1
