linux-kernel - [PATCH AUTOSEL 6.1 11/22] ACPI: video: Add force

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Message-Id: <20221217152727.98061-11-sashal@kernel.org>
Date:   Sat, 17 Dec 2022 10:27:12 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Hans de Goede <hdegoede@...hat.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Sasha Levin <sashal@...nel.org>, rafael@...nel.org,
        linux-acpi@...r.kernel.org
Subject: [PATCH AUTOSEL 6.1 11/22] ACPI: video: Add force_vendor quirk for Sony Vaio PCG-FRV35

From: Hans de Goede <hdegoede@...hat.com>

[ Upstream commit 23735543eb228c604e59f99f2f5d13aa507e5db2 ]

The Sony Vaio PCG-FRV35 advertises both native and vendor backlight
control interfaces. With the upcoming changes to prefer native over
vendor acpi_video_get_backlight_type() will start returning native on
these laptops.

But the native radeon_bl0 interface does not work, where as the sony
vendor interface does work. Add a quirk to force use of the vendor
interface.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/acpi/video_detect.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 0ab98f2e484c..8e8b435b4c8c 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -237,6 +237,19 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		},
 	},
 
+	/*
+	 * Models which should use the vendor backlight interface,
+	 * because of broken native backlight control.
+	 */
+	{
+	 .callback = video_detect_force_vendor,
+	 /* Sony Vaio PCG-FRV35 */
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "PCG-FRV35"),
+		},
+	},
+
 	/*
 	 * Toshiba models with Transflective display, these need to use
 	 * the toshiba_acpi vendor driver for proper Transflective handling.
-- 
2.35.1