6.8-stable review patch. If anyone has any objections, please let me know.
------------------
From: Armin Wolf <W_Armin@xxxxxx>
[ 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@xxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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
--
2.43.0
