From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?=
 <emulatorman@parabola.nu>
Date: Thu, 20 Oct 2016 00:10:27 -0300
Subject: Linux-libre 4.8.2-gnu

---
 sound/soc/intel/atom/sst/sst_acpi.c | 44 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

(limited to 'sound/soc/intel/atom/sst')

diff --git a/sound/soc/intel/atom/sst/sst_acpi.c b/sound/soc/intel/atom/sst/sst_acpi.c
index cbdda5d7d..aaf6d6579 100644
--- a/sound/soc/intel/atom/sst/sst_acpi.c
+++ b/sound/soc/intel/atom/sst/sst_acpi.c
@@ -28,6 +28,7 @@
 #include <linux/firmware.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_qos.h>
+#include <linux/dmi.h>
 #include <linux/acpi.h>
 #include <asm/platform_sst_audio.h>
 #include <sound/core.h>
@@ -237,6 +238,9 @@ static int sst_acpi_probe(struct platform_device *pdev)
 		dev_err(dev, "No matching machine driver found\n");
 		return -ENODEV;
 	}
+	if (mach->machine_quirk)
+		mach = mach->machine_quirk(mach);
+
 	pdata = mach->pdata;
 
 	ret = kstrtouint(id->id, 16, &dev_id);
@@ -320,6 +324,44 @@ static int sst_acpi_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static unsigned long cht_machine_id;
+
+#define CHT_SURFACE_MACH 1
+
+static int cht_surface_quirk_cb(const struct dmi_system_id *id)
+{
+	cht_machine_id = CHT_SURFACE_MACH;
+	return 1;
+}
+
+
+static const struct dmi_system_id cht_table[] = {
+	{
+		.callback = cht_surface_quirk_cb,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Surface 3"),
+		},
+	},
+};
+
+
+static struct sst_acpi_mach cht_surface_mach = {
+	"10EC5640", "cht-bsw-rt5645", "/*(DEBLOBBED)*/", "cht-bsw", NULL,
+								&chv_platform_data };
+
+static struct sst_acpi_mach *cht_quirk(void *arg)
+{
+	struct sst_acpi_mach *mach = arg;
+
+	dmi_check_system(cht_table);
+
+	if (cht_machine_id == CHT_SURFACE_MACH)
+		return &cht_surface_mach;
+	else
+		return mach;
+}
+
 static struct sst_acpi_mach sst_acpi_bytcr[] = {
 	{"10EC5640", "bytcr_rt5640", "/*(DEBLOBBED)*/", "bytcr_rt5640", NULL,
 						&byt_rvp_platform_data },
@@ -343,7 +385,7 @@ static struct sst_acpi_mach sst_acpi_chv[] = {
 	{"193C9890", "cht-bsw-max98090", "/*(DEBLOBBED)*/", "cht-bsw", NULL,
 						&chv_platform_data },
 	/* some CHT-T platforms rely on RT5640, use Baytrail machine driver */
-	{"10EC5640", "bytcr_rt5640", "/*(DEBLOBBED)*/", "bytcr_rt5640", NULL,
+	{"10EC5640", "bytcr_rt5640", "/*(DEBLOBBED)*/", "bytcr_rt5640", cht_quirk,
 						&chv_platform_data },
 
 	{},
-- 
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