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ACPI: bus: Indicate support for more than 16 p-states thru _OSC

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The code responsible for parsing the available p-states should
have no problems handling more than 16 p-states.

Indicate this by setting bit 10 ("Greater Than 16 p-state support")
when evaluating _OSC.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Armin Wolf 2024-03-09 21:13:07 +01:00 committed by Rafael J. Wysocki
parent 95d43290f1
commit 6e8345f23c
2 changed files with 2 additions and 0 deletions
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1
drivers/acpi/bus.c
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@ -321,6 +321,7 @@ static void acpi_bus_osc_negotiate_platform_control(void)
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_OVER_16_PSTATES_SUPPORT;
if (IS_ENABLED(CONFIG_ACPI_PRMT))
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT;
if (IS_ENABLED(CONFIG_ACPI_FFH))

1
include/linux/acpi.h
View File

@ -574,6 +574,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
#define OSC_SB_PCLPI_SUPPORT 0x00000080
#define OSC_SB_OSLPI_SUPPORT 0x00000100
#define OSC_SB_FAST_THERMAL_SAMPLING_SUPPORT 0x00000200
#define OSC_SB_OVER_16_PSTATES_SUPPORT 0x00000400
#define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000
#define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000
#define OSC_SB_CPC_FLEXIBLE_ADR_SPACE 0x00004000