linux-kernel - [PATCH 3/4] ACPI: OSI: Remove Linux-HPI-Hybrid-Graphics

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Date:   Tue, 23 Aug 2022 13:51:33 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <rafael@...nel.org>, Len Brown <lenb@...nel.org>
CC:     <nouveau@...ts.freedesktop.org>, <hdegoede@...hat.com>,
        <ddadap@...dia.com>, <Dell.Client.Kernel@...l.com>,
        <kai.heng.feng@...onical.com>, <kherbst@...hat.com>,
        Mario Limonciello <mario.limonciello@....com>,
        Lyude Paul <lyude@...hat.com>, <linux-acpi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/4] ACPI: OSI: Remove Linux-HPI-Hybrid-Graphics _OSI string

This string was introduced because drivers for NVIDIA hardware
didn't handle mux control properly.  This was fixed by commit 8e55f99c510f
("drm/i915: Invoke another _DSM to enable MUX on HP Workstation laptops").
So vendors shouldn't be using this string to modify ASL anymore.

Suggested-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
Reviewed-by: Lyude Paul <lyude@...hat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/acpi/osi.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c
index 0d635eec87c4..d4405e1ca9b9 100644
--- a/drivers/acpi/osi.c
+++ b/drivers/acpi/osi.c
@@ -44,13 +44,6 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
 	{"Processor Device", true},
 	{"3.0 _SCP Extensions", true},
 	{"Processor Aggregator Device", true},
-	/*
-	 * Linux-HPI-Hybrid-Graphics is used by BIOS to enable dGPU to
-	 * output video directly to external monitors on HP Inc. mobile
-	 * workstations as Nvidia and AMD VGA drivers provide limited
-	 * hybrid graphics supports.
-	 */
-	{"Linux-HPI-Hybrid-Graphics", true},
 };
 
 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
-- 
2.34.1