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authorStefan Binding <sbinding@opensource.cirrus.com>2022-06-30 03:23:22 +0300
committerTakashi Iwai <tiwai@suse.de>2022-07-14 12:19:37 +0300
commit3233b978af23f11b4ad4f7f11a9a64bd05702b1f (patch)
tree6715f638b90154bcb77d23baf4f5fd88a7bd76b1
parent89422df9548002adfffb73799cebe4909cfc8902 (diff)
downloadlinux-3233b978af23f11b4ad4f7f11a9a64bd05702b1f.tar.xz
ALSA: hda: hda_cs_dsp_ctl: Add Library to support CS_DSP ALSA controls
The cs35l41 part contains a DSP which is able to run firmware. The cs_dsp library can be used to control the DSP. These controls can be exposed to userspace using ALSA controls. This library adds apis to be able to interface between cs_dsp and hda drivers and expose the relevant controls as ALSA controls. [ Note: the dependency of CONFIG_SND_HDA_CS_DSP_CONTROLS Kconfig is corrected. Also, this Kconfig isn't enabled now but will be actually enabled in a later patch -- tiwai ] Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com> Link: https://lore.kernel.org/r/20220630002335.366545-2-vitalyr@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--MAINTAINERS1
-rw-r--r--sound/pci/hda/Kconfig4
-rw-r--r--sound/pci/hda/Makefile2
-rw-r--r--sound/pci/hda/hda_cs_dsp_ctl.c193
-rw-r--r--sound/pci/hda/hda_cs_dsp_ctl.h33
5 files changed, 233 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 5582019bb0f0..e0fb3e3f6fde 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4755,6 +4755,7 @@ S: Maintained
F: Documentation/devicetree/bindings/sound/cirrus,cs*
F: include/dt-bindings/sound/cs*
F: sound/pci/hda/cs*
+F: sound/pci/hda/hda_cs_dsp_ctl.*
F: sound/soc/codecs/cs*
CIRRUS LOGIC DSP FIRMWARE DRIVER
diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index 8b73a12d356f..a17803953222 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -96,6 +96,10 @@ config SND_HDA_SCODEC_CS35L41
select SND_HDA_GENERIC
select REGMAP_IRQ
+config SND_HDA_CS_DSP_CONTROLS
+ tristate
+ select CS_DSP
+
config SND_HDA_SCODEC_CS35L41_I2C
tristate "Build CS35L41 HD-audio side codec support for I2C Bus"
depends on I2C
diff --git a/sound/pci/hda/Makefile b/sound/pci/hda/Makefile
index 3e7bc608d45f..00d306104484 100644
--- a/sound/pci/hda/Makefile
+++ b/sound/pci/hda/Makefile
@@ -31,6 +31,7 @@ snd-hda-codec-hdmi-objs := patch_hdmi.o hda_eld.o
snd-hda-scodec-cs35l41-objs := cs35l41_hda.o
snd-hda-scodec-cs35l41-i2c-objs := cs35l41_hda_i2c.o
snd-hda-scodec-cs35l41-spi-objs := cs35l41_hda_spi.o
+snd-hda-cs-dsp-ctls-objs := hda_cs_dsp_ctl.o
# common driver
obj-$(CONFIG_SND_HDA) := snd-hda-codec.o
@@ -54,6 +55,7 @@ obj-$(CONFIG_SND_HDA_CODEC_HDMI) += snd-hda-codec-hdmi.o
obj-$(CONFIG_SND_HDA_SCODEC_CS35L41) += snd-hda-scodec-cs35l41.o
obj-$(CONFIG_SND_HDA_SCODEC_CS35L41_I2C) += snd-hda-scodec-cs35l41-i2c.o
obj-$(CONFIG_SND_HDA_SCODEC_CS35L41_SPI) += snd-hda-scodec-cs35l41-spi.o
+obj-$(CONFIG_SND_HDA_CS_DSP_CONTROLS) += snd-hda-cs-dsp-ctls.o
# this must be the last entry after codec drivers;
# otherwise the codec patches won't be hooked before the PCI probe
diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c
new file mode 100644
index 000000000000..74e2c5bd1b08
--- /dev/null
+++ b/sound/pci/hda/hda_cs_dsp_ctl.c
@@ -0,0 +1,193 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// HDA DSP ALSA Control Driver
+//
+// Copyright 2022 Cirrus Logic, Inc.
+//
+// Author: Stefan Binding <sbinding@opensource.cirrus.com>
+
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <linux/firmware/cirrus/cs_dsp.h>
+#include <linux/firmware/cirrus/wmfw.h>
+#include "hda_cs_dsp_ctl.h"
+
+#define ADSP_MAX_STD_CTRL_SIZE 512
+
+struct hda_cs_dsp_coeff_ctl {
+ struct cs_dsp_coeff_ctl *cs_ctl;
+ struct snd_card *card;
+ struct snd_kcontrol *kctl;
+};
+
+static const char * const hda_cs_dsp_fw_text[HDA_CS_DSP_NUM_FW] = {
+ [HDA_CS_DSP_FW_SPK_PROT] = "Prot",
+ [HDA_CS_DSP_FW_SPK_CALI] = "Cali",
+ [HDA_CS_DSP_FW_SPK_DIAG] = "Diag",
+ [HDA_CS_DSP_FW_MISC] = "Misc",
+};
+
+static int hda_cs_dsp_coeff_info(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
+{
+ struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
+ struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = cs_ctl->len;
+
+ return 0;
+}
+
+static int hda_cs_dsp_coeff_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
+ struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
+ char *p = ucontrol->value.bytes.data;
+ int ret = 0;
+
+ mutex_lock(&cs_ctl->dsp->pwr_lock);
+ ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, p, cs_ctl->len);
+ mutex_unlock(&cs_ctl->dsp->pwr_lock);
+
+ return ret;
+}
+
+static int hda_cs_dsp_coeff_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
+ struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
+ char *p = ucontrol->value.bytes.data;
+ int ret;
+
+ mutex_lock(&cs_ctl->dsp->pwr_lock);
+ ret = cs_dsp_coeff_read_ctrl(cs_ctl, 0, p, cs_ctl->len);
+ mutex_unlock(&cs_ctl->dsp->pwr_lock);
+
+ return ret;
+}
+
+static unsigned int wmfw_convert_flags(unsigned int in)
+{
+ unsigned int out, rd, wr, vol;
+
+ rd = SNDRV_CTL_ELEM_ACCESS_READ;
+ wr = SNDRV_CTL_ELEM_ACCESS_WRITE;
+ vol = SNDRV_CTL_ELEM_ACCESS_VOLATILE;
+
+ out = 0;
+
+ if (in) {
+ out |= rd;
+ if (in & WMFW_CTL_FLAG_WRITEABLE)
+ out |= wr;
+ if (in & WMFW_CTL_FLAG_VOLATILE)
+ out |= vol;
+ } else {
+ out |= rd | wr | vol;
+ }
+
+ return out;
+}
+
+static int hda_cs_dsp_add_kcontrol(struct hda_cs_dsp_coeff_ctl *ctl, const char *name)
+{
+ struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
+ struct snd_kcontrol_new kcontrol = {0};
+ struct snd_kcontrol *kctl;
+ int ret = 0;
+
+ if (cs_ctl->len > ADSP_MAX_STD_CTRL_SIZE) {
+ dev_err(cs_ctl->dsp->dev, "KControl %s: length %zu exceeds maximum %d\n", name,
+ cs_ctl->len, ADSP_MAX_STD_CTRL_SIZE);
+ return -EINVAL;
+ }
+
+ kcontrol.name = name;
+ kcontrol.info = hda_cs_dsp_coeff_info;
+ kcontrol.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ kcontrol.access = wmfw_convert_flags(cs_ctl->flags);
+ kcontrol.get = hda_cs_dsp_coeff_get;
+ kcontrol.put = hda_cs_dsp_coeff_put;
+
+ /* Save ctl inside private_data, ctl is owned by cs_dsp,
+ * and will be freed when cs_dsp removes the control */
+ kctl = snd_ctl_new1(&kcontrol, (void *)ctl);
+ if (!kctl) {
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ ret = snd_ctl_add(ctl->card, kctl);
+ if (ret) {
+ dev_err(cs_ctl->dsp->dev, "Failed to add KControl %s = %d\n", kcontrol.name, ret);
+ return ret;
+ }
+
+ dev_dbg(cs_ctl->dsp->dev, "Added KControl: %s\n", kcontrol.name);
+ ctl->kctl = kctl;
+
+ return 0;
+}
+
+int hda_cs_dsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl, struct hda_cs_dsp_ctl_info *info)
+{
+ struct cs_dsp *cs_dsp = cs_ctl->dsp;
+ char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
+ struct hda_cs_dsp_coeff_ctl *ctl;
+ const char *region_name;
+ int ret;
+
+ if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
+ return 0;
+
+ region_name = cs_dsp_mem_region_name(cs_ctl->alg_region.type);
+ if (!region_name) {
+ dev_err(cs_dsp->dev, "Unknown region type: %d\n", cs_ctl->alg_region.type);
+ return -EINVAL;
+ }
+
+ ret = scnprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN, "%s %s %.12s %x", info->device_name,
+ cs_dsp->name, hda_cs_dsp_fw_text[info->fw_type], cs_ctl->alg_region.alg);
+
+ if (cs_ctl->subname) {
+ int avail = SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret - 2;
+ int skip = 0;
+
+ /* Truncate the subname from the start if it is too long */
+ if (cs_ctl->subname_len > avail)
+ skip = cs_ctl->subname_len - avail;
+
+ snprintf(name + ret, SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret,
+ " %.*s", cs_ctl->subname_len - skip, cs_ctl->subname + skip);
+ }
+
+ ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
+ if (!ctl)
+ return -ENOMEM;
+
+ ctl->cs_ctl = cs_ctl;
+ ctl->card = info->card;
+ cs_ctl->priv = ctl;
+
+ ret = hda_cs_dsp_add_kcontrol(ctl, name);
+ if (ret) {
+ dev_err(cs_dsp->dev, "Error (%d) adding control %s\n", ret, name);
+ kfree(ctl);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_add, SND_HDA_CS_DSP_CONTROLS);
+
+void hda_cs_dsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl)
+{
+ struct hda_cs_dsp_coeff_ctl *ctl = cs_ctl->priv;
+
+ kfree(ctl);
+}
+EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_remove, SND_HDA_CS_DSP_CONTROLS);
+
+MODULE_DESCRIPTION("CS_DSP ALSA Control HDA Library");
+MODULE_AUTHOR("Stefan Binding, <sbinding@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/pci/hda/hda_cs_dsp_ctl.h b/sound/pci/hda/hda_cs_dsp_ctl.h
new file mode 100644
index 000000000000..1c6d0fc9a2cc
--- /dev/null
+++ b/sound/pci/hda/hda_cs_dsp_ctl.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * HDA DSP ALSA Control Driver
+ *
+ * Copyright 2022 Cirrus Logic, Inc.
+ *
+ * Author: Stefan Binding <sbinding@opensource.cirrus.com>
+ */
+
+#ifndef __HDA_CS_DSP_CTL_H__
+#define __HDA_CS_DSP_CTL_H__
+
+#include <sound/soc.h>
+#include <linux/firmware/cirrus/cs_dsp.h>
+
+enum hda_cs_dsp_fw_id {
+ HDA_CS_DSP_FW_SPK_PROT,
+ HDA_CS_DSP_FW_SPK_CALI,
+ HDA_CS_DSP_FW_SPK_DIAG,
+ HDA_CS_DSP_FW_MISC,
+ HDA_CS_DSP_NUM_FW
+};
+
+struct hda_cs_dsp_ctl_info {
+ struct snd_card *card;
+ enum hda_cs_dsp_fw_id fw_type;
+ const char *device_name;
+};
+
+int hda_cs_dsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl, struct hda_cs_dsp_ctl_info *info);
+void hda_cs_dsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl);
+
+#endif /*__HDA_CS_DSP_CTL_H__*/