linux-kernel - [PATCH 1/4] ACPI: OSI: Remove Linux-Dell-Video

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Date:   Tue, 23 Aug 2022 13:51:31 -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 1/4] ACPI: OSI: Remove Linux-Dell-Video _OSI string

This string was introduced because drivers for NVIDIA hardware
had bugs supporting RTD3 in the past.  Thoes bugs have been fixed
by commit 5775b843a619 ("PCI: Restore config space on runtime resume
despite being unbound"). so vendors shouldn't be using this string
to modify ASL anymore.

Reviewed-by: Lyude Paul <lyude@...hat.com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/acpi/osi.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/acpi/osi.c b/drivers/acpi/osi.c
index 9f6853809138..c2f6b2f553d9 100644
--- a/drivers/acpi/osi.c
+++ b/drivers/acpi/osi.c
@@ -44,15 +44,6 @@ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
 	{"Processor Device", true},
 	{"3.0 _SCP Extensions", true},
 	{"Processor Aggregator Device", true},
-	/*
-	 * Linux-Dell-Video is used by BIOS to disable RTD3 for NVidia graphics
-	 * cards as RTD3 is not supported by drivers now.  Systems with NVidia
-	 * cards will hang without RTD3 disabled.
-	 *
-	 * Once NVidia drivers officially support RTD3, this _OSI strings can
-	 * be removed if both new and old graphics cards are supported.
-	 */
-	{"Linux-Dell-Video", true},
 	/*
 	 * Linux-Lenovo-NV-HDMI-Audio is used by BIOS to power on NVidia's HDMI
 	 * audio device which is turned off for power-saving in Windows OS.
-- 
2.34.1