6.8-stable review patch. If anyone has any objections, please let me know.
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From: Armin Wolf W_Armin@gmx.de
[ Upstream commit 95d43290f1e476b3be782dd17642e452d0436266 ]
The ACPI thermal driver already uses the _TPF ACPI method to retrieve precise sampling time values, but this is not reported thru _OSC.
Fix this by setting bit 9 ("Fast Thermal Sampling support") when evaluating _OSC.
Fixes: a2ee7581afd5 ("ACPI: thermal: Add Thermal fast Sampling Period (_TFP) support") Signed-off-by: Armin Wolf W_Armin@gmx.de Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/bus.c | 2 ++ include/linux/acpi.h | 1 + 2 files changed, 3 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 569bd15f211be..9c5fc12fc13cb 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -316,6 +316,8 @@ static void acpi_bus_osc_negotiate_platform_control(void) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; + if (IS_ENABLED(CONFIG_ACPI_THERMAL)) + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_FAST_THERMAL_SAMPLING_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index b7165e52b3c68..e4f4fb67ab55a 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -573,6 +573,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); #define OSC_SB_CPCV2_SUPPORT 0x00000040 #define OSC_SB_PCLPI_SUPPORT 0x00000080 #define OSC_SB_OSLPI_SUPPORT 0x00000100 +#define OSC_SB_FAST_THERMAL_SAMPLING_SUPPORT 0x00000200 #define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000 #define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000 #define OSC_SB_CPC_FLEXIBLE_ADR_SPACE 0x00004000