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From:   Mario Limonciello <mario.limonciello@amd.com>
To:     <mario.limonciello@amd.com>, <linux-kernel@vger.kernel.org>
CC:     Hans de Goede <hdegoede@redhat.com>,
        Luya Tshimbalanga <luya@fedoraproject.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>, <linux-acpi@vger.kernel.org>
Subject: [PATCH] ACPI / x86: Add a quirk for Dell Inspiron 14 2-in-1 for StorageD3Enable
Date:   Thu, 15 Sep 2022 13:23:14 -0500
Message-ID: <20220915182315.276-1-mario.limonciello@amd.com>
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Dell Inspiron 14 2-in-1 has two ACPI nodes under GPP1 both with _ADR of
0, both without _HID.  It's ambiguous which the kernel should take, but
it seems to take "DEV0".  Unfortunately "DEV0" is missing the device
property `StorageD3Enable` which is present on "NVME".

To avoid this causing problems for suspend, add a quirk for this system
to behave like `StorageD3Enable` property was found.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=216440
Reported-and-tested-by: Luya Tshimbalanga <luya@fedoraproject.org>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
I had attempted to modify the heuristics for when two ACPI devices
have the same _ADR to prefer the one with a _DSD, but this wasn't enough
of a help. As the ACPI node doesn't contain anything valuable besides
the _DSD, it seems that a quirk for the system is a fine enough solution.

 drivers/acpi/x86/utils.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index 664070fc8349..d7cdd8406c84 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -207,9 +207,26 @@ static const struct x86_cpu_id storage_d3_cpu_ids[] = {
 	{}
 };
 
+static const struct dmi_system_id force_storage_d3_dmi[] = {
+	{
+		/*
+		 * _ADR is ambiguous between GPP1.DEV0 and GPP1.NVME
+		 * but .NVME is needed to get StorageD3Enable node
+		 * https://bugzilla.kernel.org/show_bug.cgi?id=216440
+		 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 14 7425 2-in-1"),
+		}
+	},
+	{}
+};
+
 bool force_storage_d3(void)
 {
-	return x86_match_cpu(storage_d3_cpu_ids);
+	const struct dmi_system_id *dmi_id = dmi_first_match(force_storage_d3_dmi);
+
+	return dmi_id || x86_match_cpu(storage_d3_cpu_ids);
 }
 
 /*
-- 
2.34.1