linux-kernel - [PATCH v2 14/26] ALSA: hda: cs35l41: Save Subsystem ID inside CS35L41 Driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220509214703.4482-15-vitalyr@opensource.cirrus.com>
Date:   Mon, 9 May 2022 22:46:51 +0100
From:   Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Mark Brown <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v2 14/26] ALSA: hda: cs35l41: Save Subsystem ID inside CS35L41 Driver

From: Stefan Binding <sbinding@...nsource.cirrus.com>

The Subsystem ID is read from the HDA driver, and will
be used by the CS35L41 driver to be able to uniquely
identify the laptop, which is required to be able to
define firmware to be used by specific models.

Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
---
 sound/pci/hda/cs35l41_hda.c   | 3 +++
 sound/pci/hda/cs35l41_hda.h   | 1 +
 sound/pci/hda/hda_component.h | 1 +
 sound/pci/hda/patch_realtek.c | 1 +
 4 files changed, 6 insertions(+)

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index fe2ba03e602b..c235b899aa04 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -346,6 +346,9 @@ static int cs35l41_hda_bind(struct device *dev, struct device *master, void *mas
 		return -EBUSY;
 
 	comps->dev = dev;
+	if (!cs35l41->acpi_subsystem_id)
+		cs35l41->acpi_subsystem_id = devm_kasprintf(dev, GFP_KERNEL,
+							    "%.8x", comps->subsystem_id);
 	cs35l41->codec = comps->codec;
 	strscpy(comps->name, dev_name(dev), sizeof(comps->name));
 	comps->playback_hook = cs35l41_hda_playback_hook;
diff --git a/sound/pci/hda/cs35l41_hda.h b/sound/pci/hda/cs35l41_hda.h
index 03c5f14631dd..b8352088a5cb 100644
--- a/sound/pci/hda/cs35l41_hda.h
+++ b/sound/pci/hda/cs35l41_hda.h
@@ -42,6 +42,7 @@ struct cs35l41_hda {
 	int channel_index;
 	unsigned volatile long irq_errors;
 	const char *amp_name;
+	const char *acpi_subsystem_id;
 	struct regmap_irq_chip_data *irq_data;
 	bool firmware_running;
 	bool halo_initialized;
diff --git a/sound/pci/hda/hda_component.h b/sound/pci/hda/hda_component.h
index 534e845b9cd1..fa6df52e7855 100644
--- a/sound/pci/hda/hda_component.h
+++ b/sound/pci/hda/hda_component.h
@@ -14,6 +14,7 @@
 struct hda_component {
 	struct device *dev;
 	char name[HDA_MAX_NAME_SIZE];
+	int subsystem_id;
 	struct hda_codec *codec;
 	void (*playback_hook)(struct device *dev, int action);
 };
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 3220f9f59e21..13ddece6096a 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6631,6 +6631,7 @@ static void cs35l41_generic_fixup(struct hda_codec *cdc, int action, const char
 			if (!name)
 				return;
 			spec->comps[i].codec = cdc;
+			spec->comps[i].subsystem_id = cdc->core.subsystem_id;
 			component_match_add(dev, &spec->match, component_compare_dev_name, name);
 		}
 		ret = component_master_add_with_match(dev, &comp_master_ops, spec->match);
-- 
2.34.1