1 files changed, 142 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);