From: Armin Wolf <W_Armin@gmx.de>
To: rafael@kernel.org, lenb@kernel.org
Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/5] ACPI: bus: Indicate support for more than 16 p-states thru _OSC
Date: Sat, 9 Mar 2024 21:13:07 +0100 [thread overview]
Message-ID: <20240309201310.7548-3-W_Armin@gmx.de> (raw)
In-Reply-To: <20240309201310.7548-1-W_Armin@gmx.de>
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>
---
drivers/acpi/bus.c | 1 +
include/linux/acpi.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 9c13a4e43fa8..d5b0e80dc48e 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -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))
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 7727ebbc4219..baa07b5a717f 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -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
--
2.39.2
next prev parent reply other threads:[~2024-03-09 20:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-09 20:13 [PATCH 0/5] ACPI: bus: _OSC fixes Armin Wolf
2024-03-09 20:13 ` [PATCH 1/5] ACPI: bus: Indicate support for _TFP thru _OSC Armin Wolf
2024-03-09 20:13 ` Armin Wolf [this message]
2024-03-09 20:13 ` [PATCH 3/5] ACPI: bus: Indicate support for the Generic Event Device " Armin Wolf
2024-03-09 20:13 ` [PATCH 4/5] ACPI: Fix Generic Initiator Affinity _OSC bit Armin Wolf
2024-03-09 20:13 ` [PATCH 5/5] ACPI: bus: Indicate support for IRQ ResourceSource thru _OSC Armin Wolf
2024-03-12 20:10 ` [PATCH 0/5] ACPI: bus: _OSC fixes Rafael J. Wysocki
2024-03-13 22:28 ` Armin Wolf
2024-03-27 15:41 ` Rafael J. Wysocki
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