[PATCH 1/3] ASoC: Intel: sof_sdw: Add lookup of quirk using PCI subsystem ID

[Bard Liao <yung-chuan.liao@linux.intel.com>]

From: Richard Fitzgerald <rf@opensource.cirrus.com>

Add lookup of PCI subsystem vendor:device ID to find a quirk.

The subsystem ID (SSID) is part of the PCI specification to uniquely
identify a particular system-specific implementation of a hardware
device.

Unlike DMI information, it identifies the sound hardware itself, rather
than a specific model of PC. SSID can be more reliable and stable than
DMI strings, and is preferred by some vendors as the way to identify
the actual sound hardware.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 sound/soc/intel/boards/sof_sdw.c | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_sdw.c
index b0d35fda7b17..381fae5943fe 100644
--- a/sound/soc/intel/boards/sof_sdw.c
+++ b/sound/soc/intel/boards/sof_sdw.c
@@ -13,6 +13,7 @@
 #include <linux/soundwire/sdw.h>
 #include <linux/soundwire/sdw_type.h>
 #include <linux/soundwire/sdw_intel.h>
+#include <sound/core.h>
 #include <sound/soc-acpi.h>
 #include "sof_sdw_common.h"
 #include "../../codecs/rt711.h"
@@ -751,6 +752,22 @@ static const struct dmi_system_id sof_sdw_quirk_table[] = {
 	{}
 };
 
+static const struct snd_pci_quirk sof_sdw_ssid_quirk_table[] = {
+	{}
+};
+
+static void sof_sdw_check_ssid_quirk(const struct snd_soc_acpi_mach *mach)
+{
+	const struct snd_pci_quirk *quirk_entry;
+
+	quirk_entry = snd_pci_quirk_lookup_id(mach->mach_params.subsystem_vendor,
+					      mach->mach_params.subsystem_device,
+					      sof_sdw_ssid_quirk_table);
+
+	if (quirk_entry)
+		sof_sdw_quirk = quirk_entry->value;
+}
+
 static struct snd_soc_dai_link_component platform_component[] = {
 	{
 		/* name might be overridden during probe */
@@ -1278,6 +1295,13 @@ static int mc_probe(struct platform_device *pdev)
 
 	snd_soc_card_set_drvdata(card, ctx);
 
+	if (mach->mach_params.subsystem_id_set) {
+		snd_soc_card_set_pci_ssid(card,
+					  mach->mach_params.subsystem_vendor,
+					  mach->mach_params.subsystem_device);
+		sof_sdw_check_ssid_quirk(mach);
+	}
+
 	dmi_check_system(sof_sdw_quirk_table);
 
 	if (quirk_override != -1) {
@@ -1293,12 +1317,6 @@ static int mc_probe(struct platform_device *pdev)
 	for (i = 0; i < ctx->codec_info_list_count; i++)
 		codec_info_list[i].amp_num = 0;
 
-	if (mach->mach_params.subsystem_id_set) {
-		snd_soc_card_set_pci_ssid(card,
-					  mach->mach_params.subsystem_vendor,
-					  mach->mach_params.subsystem_device);
-	}
-
 	ret = sof_card_dai_links_create(card);
 	if (ret < 0)
 		return ret;
-- 
2.43.0