Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Maxim Mikityanskiy <maxtram95@gmail.com>,
        Hans de Goede <hdegoede@redhat.com>,
        Sasha Levin <sashal@kernel.org>, alexhung@gmail.com,
        markgross@kernel.org, platform-driver-x86@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 23/31] platform/x86/intel/hid: Add HP Dragonfly G2 to VGBS DMI quirks
Date:   Sun, 13 Aug 2023 12:05:56 -0400
Message-Id: <20230813160605.1080385-23-sashal@kernel.org>
In-Reply-To: <20230813160605.1080385-1-sashal@kernel.org>
References: <20230813160605.1080385-1-sashal@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Maxim Mikityanskiy <maxtram95@gmail.com>

[ Upstream commit 7783e97f8558ad7a4d1748922461bc88483fbcdf ]

HP Elite Dragonfly G2 (a convertible laptop/tablet) has a reliable VGBS
method. If VGBS is not called on boot, the firmware sends an initial
0xcd event shortly after calling the BTNL method, but only if the device
is booted in the laptop mode. However, if the device is booted in the
tablet mode and VGBS is not called, there is no initial 0xcc event, and
the input device for SW_TABLET_MODE is not registered up until the user
turns the device into the laptop mode.

Call VGBS on boot on this device to get the initial state of
SW_TABLET_MODE in a reliable way.

Tested with BIOS 1.13.1.

Signed-off-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Link: https://lore.kernel.org/r/20230716183213.64173-1-maxtram95@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/x86/intel/hid.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/platform/x86/intel/hid.c b/drivers/platform/x86/intel/hid.c
index 73ecbdfcfb7c0..f59a3cc9767b9 100644
--- a/drivers/platform/x86/intel/hid.c
+++ b/drivers/platform/x86/intel/hid.c
@@ -138,6 +138,12 @@ static const struct dmi_system_id dmi_vgbs_allow_list[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Surface Go"),
 		},
 	},
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP Elite Dragonfly G2 Notebook PC"),
+		},
+	},
 	{ }
 };
 
-- 
2.40.1