From 10212754a0d2c4b4ae951c04f154a82dd2a1f9c4 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sat, 18 Jun 2022 19:15:22 +0200
Subject: [PATCH] ACPI: video: Drop NL5x?U, PF4NU1F and PF5?U??
 acpi_backlight=native quirks

acpi_backlight=native is the default for these, but as the comment
explains the quirk was still necessary because even briefly registering
the acpi_video0 backlight; and then unregistering it once the native
driver showed up, was leading to issues.

After the "ACPI: video: Make backlight class device registration
a separate step" patch from earlier in this patch-series, we no
longer briefly register the acpi_video0 backlight on systems where
the native driver should be used.

So this is no longer an issue an the quirks are no longer needed.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=215683
Tested-by: Werner Sembach <wse@tuxedocomputers.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/acpi/video_detect.c | 92 +------------------------------------
 1 file changed, 1 insertion(+), 91 deletions(-)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index af2833b57b8b..789d5913c178 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -609,97 +609,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_BOARD_NAME, "N250P"),
 		},
 	},
-	/*
-	 * Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2 have both a
-	 * working native and video interface. However the default detection
-	 * mechanism first registers the video interface before unregistering
-	 * it again and switching to the native interface during boot. This
-	 * results in a dangling SBIOS request for backlight change for some
-	 * reason, causing the backlight to switch to ~2% once per boot on the
-	 * first power cord connect or disconnect event. Setting the native
-	 * interface explicitly circumvents this buggy behaviour, by avoiding
-	 * the unregistering process.
-	 */
-	{
-	.callback = video_detect_force_native,
-	.ident = "Clevo NL5xRU",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "Clevo NL5xRU",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
-		DMI_MATCH(DMI_BOARD_NAME, "AURA1501"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "Clevo NL5xRU",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
-		DMI_MATCH(DMI_BOARD_NAME, "EDUBOOK1502"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "Clevo NL5xNU",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"),
-		},
-	},
-	/*
-	 * The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10,
-	 * Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo
-	 * NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2. See the description
-	 * above.
-	 */
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF5PU1G",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "PF5PU1G"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF4NU1F",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "PF4NU1F"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF4NU1F",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
-		DMI_MATCH(DMI_BOARD_NAME, "PULSE1401"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF5NU1G",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "PF5NU1G"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF5NU1G",
-	.matches = {
-		DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"),
-		DMI_MATCH(DMI_BOARD_NAME, "PULSE1501"),
-		},
-	},
-	{
-	.callback = video_detect_force_native,
-	.ident = "TongFang PF5LUXG",
-	.matches = {
-		DMI_MATCH(DMI_BOARD_NAME, "PF5LUXG"),
-		},
-	},
+
 	/*
 	 * Desktops which falsely report a backlight and which our heuristics
 	 * for this do not catch.