[PATCH v3 3/3] ALSA: hda: add support for Huawei WMI micmute LED

Ayman Bagabas
2018-11-08T17:17:49Z

Some of Huawei laptops come with a LED in the micmute key. This patch
enables and disable this LED accordingly.

Signed-off-by: Ayman Bagabas <ayman.bagabas@gmail.com>
---
drivers/platform/x86/huawei_wmi.c | 1 +
include/linux/platform_data/x86/huawei_wmi.h | 9 ++++
sound/pci/hda/huawei_wmi_helper.c | 47 ++++++++++++++++++++
sound/pci/hda/patch_realtek.c | 13 +++++-
4 files changed, 69 insertions(+), 1 deletion(-)
create mode 100644 include/linux/platform_data/x86/huawei_wmi.h
create mode 100644 sound/pci/hda/huawei_wmi_helper.c

diff --git a/drivers/platform/x86/huawei_wmi.c b/drivers/platform/x86/huawei_wmi.c
index 658c44ab2126..f06aa967c311 100644
--- a/drivers/platform/x86/huawei_wmi.c
+++ b/drivers/platform/x86/huawei_wmi.c
@@ -23,6 +23,7 @@
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/module.h>
+#include <linux/platform_data/x86/huawei_wmi.h>

MODULE_AUTHOR("Ayman Bagabas <ayman.bagabas@gmail.com>");
MODULE_DESCRIPTION("Huawei WMI hotkeys");
diff --git a/include/linux/platform_data/x86/huawei_wmi.h b/include/linux/platform_data/x86/huawei_wmi.h
new file mode 100644
index 000000000000..dd251780ee5c
--- /dev/null
+++ b/include/linux/platform_data/x86/huawei_wmi.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#if IS_ENABLED(CONFIG_HUAWEI_LAPTOP)
+#ifndef __HUAWEI_WMI_H__
+#define __HUAWEI_WMI_H__
+
+int huawei_wmi_micmute_led_set(bool on);
+
+#endif
+#endif
diff --git a/sound/pci/hda/huawei_wmi_helper.c b/sound/pci/hda/huawei_wmi_helper.c
new file mode 100644
index 000000000000..7c91f914ffba
--- /dev/null
+++ b/sound/pci/hda/huawei_wmi_helper.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Helper functions for Huawei WMI micmute LED;
+ * to be included from codec driver
+ */
+
+#if IS_ENABLED(CONFIG_HUAWEI_LAPTOP)
+#include <linux/platform_data/x86/huawei_wmi.h>
+
+static int (*huawei_wmi_micmute_led_set_func)(bool);
+
+static void update_huawei_wmi_micmute_led(struct hda_codec *codec)
+{
+ struct hda_gen_spec *spec = codec->spec;
+ huawei_wmi_micmute_led_set_func(spec->micmute_led.led_value);
+}
+
+static void alc_fixup_huawei_wmi(struct hda_codec *codec,
+ const struct hda_fixup *fix, int action)
+{
+ bool removefunc = false;
+
+ if (action == HDA_FIXUP_ACT_PROBE) {
+ if (!huawei_wmi_micmute_led_set_func)
+ huawei_wmi_micmute_led_set_func = symbol_request(huawei_wmi_micmute_led_set);
+ if (!huawei_wmi_micmute_led_set_func) {
+ codec_warn(codec, "Failed to find huawei_wmi symbol huawei_wmi_micmute_led_set\n");
+ return;
+ }
+
+ removefunc = (huawei_wmi_micmute_led_set_func(false) < 0)
+ || (snd_hda_gen_add_micmute_led(codec, update_huawei_wmi_micmute_led) < 0);
+ }
+
+ if (huawei_wmi_micmute_led_set_func && (action == HDA_FIXUP_ACT_FREE || removefunc)) {
+ symbol_put(huawei_wmi_micmute_led_set);
+ huawei_wmi_micmute_led_set_func = NULL;
+ }
+}
+
+#else
+
+static void alc_fixup_huawei_wmi(struct hda_codec *codec,
+ const struct hda_fixup *fix, int action)
+{
+}
+
+#endif
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index ed6c9c79ce46..a0fdcfb0b635 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5374,6 +5374,9 @@ static void alc_fixup_thinkpad_acpi(struct hda_codec *codec,
/* for alc295_fixup_hp_top_speakers */
#include "hp_x360_helper.c"

+/* for alc_fixup_huawei_micmute_led */
+#include "huawei_wmi_helper.c"
+
enum {
ALC269_FIXUP_SONY_VAIO,
ALC275_FIXUP_SONY_VAIO_GPIO2,
@@ -5494,6 +5497,7 @@ enum {
ALC255_FIXUP_DUMMY_LINEOUT_VERB,
ALC255_FIXUP_DELL_HEADSET_MIC,
ALC256_FIXUP_HUAWEI_MBXP_PINS,
+ ALC256_FIXUP_HUAWEI_WMI_MICMUTE_LED,
ALC295_FIXUP_HP_X360,
ALC221_FIXUP_HP_HEADSET_MIC,
};
@@ -5765,6 +5769,10 @@ static const struct hda_fixup alc269_fixups[] = {
.chained = true,
.chain_id = ALC269_FIXUP_HEADSET_MIC
},
+ [ALC256_FIXUP_HUAWEI_WMI_MICMUTE_LED] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc_fixup_huawei_wmi
+ },
[ALC256_FIXUP_HUAWEI_MBXP_PINS] = {
.type = HDA_FIXUP_PINS,
.v.pins = (const struct hda_pintbl[]) {
@@ -5779,7 +5787,9 @@ static const struct hda_fixup alc269_fixups[] = {
{0x1e, 0x411111f0},
{0x21, 0x04211020},
{ }
- }
+ },
+ .chained = true,
+ .chain_id = ALC256_FIXUP_HUAWEI_WMI_MICMUTE_LED
},
[ALC269_FIXUP_ASUS_X101_FUNC] = {
.type = HDA_FIXUP_FUNC,
@@ -6609,6 +6619,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
SND_PCI_QUIRK(0x17aa, 0x5109, "Thinkpad", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
SND_PCI_QUIRK(0x17aa, 0x511e, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
SND_PCI_QUIRK(0x17aa, 0x511f, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
+ SND_PCI_QUIRK(0x19e5, 0x3200, "Huawei MBX", ALC256_FIXUP_HUAWEI_WMI_MICMUTE_LED),
SND_PCI_QUIRK(0x19e5, 0x3204, "Huawei MBXP", ALC256_FIXUP_HUAWEI_MBXP_PINS),
SND_PCI_QUIRK(0x17aa, 0x3bf8, "Quanta FL1", ALC269_FIXUP_PCM_44K),
SND_PCI_QUIRK(0x17aa, 0x9e54, "LENOVO NB", ALC269_FIXUP_LENOVO_EAPD),
--
2.17.2