ALSA: hda - Add generic pincfg initialization

Added the generic pincfg cache and save/restore functions.
Also introduced the pin-overriding via hwdep sysfs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 223 insertions, 9 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 98884bc8f35f..6fa871f66a72 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -682,11 +682,132 @@ static int read_widget_caps(struct hda_codec *codec, hda_nid_t fg_node)
         return 0;
 }
 
+/* read all pin default configurations and save codec->init_pins */
+static int read_pin_defaults(struct hda_codec *codec)
+{
+        int i;
+        hda_nid_t nid = codec->start_nid;
+
+        for (i = 0; i < codec->num_nodes; i++, nid++) {
+                struct hda_pincfg *pin;
+                unsigned int wcaps = get_wcaps(codec, nid);
+                unsigned int wid_type = (wcaps & AC_WCAP_TYPE) >>
+                                AC_WCAP_TYPE_SHIFT;
+                if (wid_type != AC_WID_PIN)
+                        continue;
+                pin = snd_array_new(&codec->init_pins);
+                if (!pin)
+                        return -ENOMEM;
+                pin->nid = nid;
+                pin->cfg = snd_hda_codec_read(codec, nid, 0,
+                                              AC_VERB_GET_CONFIG_DEFAULT, 0);
+        }
+        return 0;
+}
+
+/* look up the given pin config list and return the item matching with NID */
+static struct hda_pincfg *look_up_pincfg(struct hda_codec *codec,
+                                         struct snd_array *array,
+                                         hda_nid_t nid)
+{
+        int i;
+        for (i = 0; i < array->used; i++) {
+                struct hda_pincfg *pin = snd_array_elem(array, i);
+                if (pin->nid == nid)
+                        return pin;
+        }
+        return NULL;
+}
+
+/* write a config value for the given NID */
+static void set_pincfg(struct hda_codec *codec, hda_nid_t nid,
+                       unsigned int cfg)
+{
+        int i;
+        for (i = 0; i < 4; i++) {
+                snd_hda_codec_write(codec, nid, 0,
+                                    AC_VERB_SET_CONFIG_DEFAULT_BYTES_0 + i,
+                                    cfg & 0xff);
+                cfg >>= 8;
+        }
+}
+
+/* set the current pin config value for the given NID.
+ * the value is cached, and read via snd_hda_codec_get_pincfg()
+ */
+int snd_hda_add_pincfg(struct hda_codec *codec, struct snd_array *list,
+                       hda_nid_t nid, unsigned int cfg)
+{
+        struct hda_pincfg *pin;
+
+        pin = look_up_pincfg(codec, list, nid);
+        if (!pin) {
+                pin = snd_array_new(list);
+                if (!pin)
+                        return -ENOMEM;
+                pin->nid = nid;
+        }
+        pin->cfg = cfg;
+        set_pincfg(codec, nid, cfg);
+        return 0;
+}
+
+int snd_hda_codec_set_pincfg(struct hda_codec *codec,
+                             hda_nid_t nid, unsigned int cfg)
+{
+        return snd_hda_add_pincfg(codec, &codec->cur_pins, nid, cfg);
+}
+EXPORT_SYMBOL_HDA(snd_hda_codec_set_pincfg);
+
+/* get the current pin config value of the given pin NID */
+unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid)
+{
+        struct hda_pincfg *pin;
+
+        pin = look_up_pincfg(codec, &codec->cur_pins, nid);
+        if (pin)
+                return pin->cfg;
+#ifdef CONFIG_SND_HDA_HWDEP
+        pin = look_up_pincfg(codec, &codec->override_pins, nid);
+        if (pin)
+                return pin->cfg;
+#endif
+        pin = look_up_pincfg(codec, &codec->init_pins, nid);
+        if (pin)
+                return pin->cfg;
+        return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_codec_get_pincfg);
+
+/* restore all current pin configs */
+static void restore_pincfgs(struct hda_codec *codec)
+{
+        int i;
+        for (i = 0; i < codec->init_pins.used; i++) {
+                struct hda_pincfg *pin = snd_array_elem(&codec->init_pins, i);
+                set_pincfg(codec, pin->nid,
+                           snd_hda_codec_get_pincfg(codec, pin->nid));
+        }
+}
 
 static void init_hda_cache(struct hda_cache_rec *cache,
                            unsigned int record_size);
 static void free_hda_cache(struct hda_cache_rec *cache);
 
+/* restore the initial pin cfgs and release all pincfg lists */
+static void restore_init_pincfgs(struct hda_codec *codec)
+{
+        /* first free cur_pins and override_pins, then call restore_pincfg
+         * so that only the values in init_pins are restored
+         */
+        snd_array_free(&codec->cur_pins);
+#ifdef CONFIG_SND_HDA_HWDEP
+        snd_array_free(&codec->override_pins);
+#endif
+        restore_pincfgs(codec);
+        snd_array_free(&codec->init_pins);
+}
+
 /*
  * codec destructor
  */
@@ -694,6 +815,7 @@ static void snd_hda_codec_free(struct hda_codec *codec)
 {
         if (!codec)
                 return;
+        restore_init_pincfgs(codec);
 #ifdef CONFIG_SND_HDA_POWER_SAVE
         cancel_delayed_work(&codec->power_work);
         flush_workqueue(codec->bus->workq);
@@ -751,6 +873,8 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr
         init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
         init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));
         snd_array_init(&codec->mixers, sizeof(struct snd_kcontrol *), 32);
+        snd_array_init(&codec->init_pins, sizeof(struct hda_pincfg), 16);
+        snd_array_init(&codec->cur_pins, sizeof(struct hda_pincfg), 16);
         if (codec->bus->modelname) {
                 codec->modelname = kstrdup(codec->bus->modelname, GFP_KERNEL);
                 if (!codec->modelname) {
@@ -787,15 +911,18 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr
         setup_fg_nodes(codec);
         if (!codec->afg && !codec->mfg) {
                 snd_printdd("hda_codec: no AFG or MFG node found\n");
-                snd_hda_codec_free(codec);
-                return -ENODEV;
+                err = -ENODEV;
+                goto error;
         }
 
-        if (read_widget_caps(codec, codec->afg ? codec->afg : codec->mfg) < 0) {
+        err = read_widget_caps(codec, codec->afg ? codec->afg : codec->mfg);
+        if (err < 0) {
                 snd_printk(KERN_ERR "hda_codec: cannot malloc\n");
-                snd_hda_codec_free(codec);
-                return -ENOMEM;
+                goto error;
         }
+        err = read_pin_defaults(codec);
+        if (err < 0)
+                goto error;
 
         if (!codec->subsystem_id) {
                 hda_nid_t nid = codec->afg ? codec->afg : codec->mfg;
@@ -808,10 +935,8 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr
 
         if (do_init) {
                 err = snd_hda_codec_configure(codec);
-                if (err < 0) {
-                        snd_hda_codec_free(codec);
-                        return err;
-                }
+                if (err < 0)
+                        goto error;
         }
         snd_hda_codec_proc_new(codec);
 
@@ -824,6 +949,10 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr
         if (codecp)
                 *codecp = codec;
         return 0;
+
+ error:
+        snd_hda_codec_free(codec);
+        return err;
 }
 EXPORT_SYMBOL_HDA(snd_hda_codec_new);
 
@@ -1334,6 +1463,9 @@ void snd_hda_codec_reset(struct hda_codec *codec)
         free_hda_cache(&codec->cmd_cache);
         init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
         init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));
+        /* free only cur_pins so that init_pins + override_pins are restored */
+        snd_array_free(&codec->cur_pins);
+        restore_pincfgs(codec);
         codec->num_pcms = 0;
         codec->pcm_info = NULL;
         codec->preset = NULL;
@@ -2175,6 +2307,7 @@ static void hda_call_codec_resume(struct hda_codec *codec)
         hda_set_power_state(codec,
                             codec->afg ? codec->afg : codec->mfg,
                             AC_PWRST_D0);
+        restore_pincfgs(codec); /* restore all current pin configs */
         hda_exec_init_verbs(codec);
         if (codec->patch_ops.resume)
                 codec->patch_ops.resume(codec);
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 09a332ada0c6..6d01a8058f0a 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -778,11 +778,14 @@ struct hda_codec {
         unsigned short spdif_ctls;      /* SPDIF control bits */
         unsigned int spdif_in_enable;   /* SPDIF input enable? */
         hda_nid_t *slave_dig_outs; /* optional digital out slave widgets */
+        struct snd_array init_pins;     /* initial (BIOS) pin configurations */
+        struct snd_array cur_pins;      /* current pin configurations */
 
 #ifdef CONFIG_SND_HDA_HWDEP
         struct snd_hwdep *hwdep;        /* assigned hwdep device */
         struct snd_array init_verbs;    /* additional init verbs */
         struct snd_array hints;         /* additional hints */
+        struct snd_array override_pins; /* default pin configs to override */
 #endif
 
         /* misc flags */
@@ -855,6 +858,18 @@ void snd_hda_codec_resume_cache(struct hda_codec *codec);
 #define snd_hda_sequence_write_cache    snd_hda_sequence_write
 #endif
 
+/* the struct for codec->pin_configs */
+struct hda_pincfg {
+        hda_nid_t nid;
+        unsigned int cfg;
+};
+
+unsigned int snd_hda_codec_get_pincfg(struct hda_codec *codec, hda_nid_t nid);
+int snd_hda_codec_set_pincfg(struct hda_codec *codec, hda_nid_t nid,
+                             unsigned int cfg);
+int snd_hda_add_pincfg(struct hda_codec *codec, struct snd_array *list,
+                       hda_nid_t nid, unsigned int cfg); /* for hwdep */
+
 /*
  * Mixer
  */
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 4ae51dcb81af..71039a6dec28 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -109,6 +109,7 @@ static void clear_hwdep_elements(struct hda_codec *codec)
         for (i = 0; i < codec->hints.used; i++, head++)
                 kfree(*head);
         snd_array_free(&codec->hints);
+        snd_array_free(&codec->override_pins);
 }
 
 static void hwdep_free(struct snd_hwdep *hwdep)
@@ -141,6 +142,7 @@ int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec)
 
         snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
         snd_array_init(&codec->hints, sizeof(char *), 32);
+        snd_array_init(&codec->override_pins, sizeof(struct hda_pincfg), 16);
 
         return 0;
 }
@@ -316,6 +318,67 @@ static ssize_t hints_store(struct device *dev,
         return count;
 }
 
+static ssize_t pin_configs_show(struct hda_codec *codec,
+                                struct snd_array *list,
+                                char *buf)
+{
+        int i, len = 0;
+        for (i = 0; i < list->used; i++) {
+                struct hda_pincfg *pin = snd_array_elem(list, i);
+                len += sprintf(buf + len, "0x%02x 0x%08x\n",
+                               pin->nid, pin->cfg);
+        }
+        return len;
+}
+
+static ssize_t init_pin_configs_show(struct device *dev,
+                                     struct device_attribute *attr,
+                                     char *buf)
+{
+        struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+        struct hda_codec *codec = hwdep->private_data;
+        return pin_configs_show(codec, &codec->init_pins, buf);
+}
+
+static ssize_t override_pin_configs_show(struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+        struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+        struct hda_codec *codec = hwdep->private_data;
+        return pin_configs_show(codec, &codec->override_pins, buf);
+}
+
+static ssize_t cur_pin_configs_show(struct device *dev,
+                                    struct device_attribute *attr,
+                                    char *buf)
+{
+        struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+        struct hda_codec *codec = hwdep->private_data;
+        return pin_configs_show(codec, &codec->cur_pins, buf);
+}
+
+#define MAX_PIN_CONFIGS         32
+
+static ssize_t override_pin_configs_store(struct device *dev,
+                                          struct device_attribute *attr,
+                                          const char *buf, size_t count)
+{
+        struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+        struct hda_codec *codec = hwdep->private_data;
+        int nid, cfg;
+        int err;
+
+        if (sscanf(buf, "%i %i", &nid, &cfg) != 2)
+                return -EINVAL;
+        if (!nid)
+                return -EINVAL;
+        err = snd_hda_add_pincfg(codec, &codec->override_pins, nid, cfg);
+        if (err < 0)
+                return err;
+        return count;
+}
+
 #define CODEC_ATTR_RW(type) \
         __ATTR(type, 0644, type##_show, type##_store)
 #define CODEC_ATTR_RO(type) \
@@ -333,6 +396,9 @@ static struct device_attribute codec_attrs[] = {
         CODEC_ATTR_RW(modelname),
         CODEC_ATTR_WO(init_verbs),
         CODEC_ATTR_WO(hints),
+        CODEC_ATTR_RO(init_pin_configs),
+        CODEC_ATTR_RW(override_pin_configs),
+        CODEC_ATTR_RO(cur_pin_configs),
         CODEC_ATTR_WO(reconfig),
         CODEC_ATTR_WO(clear),
 };