linux-kernel - [PATCH 3/5] ACPI: bus: Indicate support for the Generic Event Device thru

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Message-Id: <20240309201310.7548-4-W_Armin@gmx.de>
Date: Sat,  9 Mar 2024 21:13:08 +0100
From: Armin Wolf <W_Armin@....de>
To: rafael@...nel.org,
	lenb@...nel.org
Cc: linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] ACPI: bus: Indicate support for the Generic Event Device thru _OSC

A device driver for the Generic Event Device (ACPI0013) already
exists for quite some time, but support for it was never reported
thru _OSC.

Fix this by setting bit 11 ("Generic Event Device support") when
evaluating _OSC.

Fixes: 3db80c230da1 ("ACPI: implement Generic Event Device")
Signed-off-by: Armin Wolf <W_Armin@....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 d5b0e80dc48e..0c48b603098a 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -322,6 +322,7 @@ 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;
+	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GED_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 baa07b5a717f..aa26259a28b8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -575,6 +575,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 #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_GED_SUPPORT			0x00000800
 #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