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path: root/sound/pci/hda/hda_intel.c
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Diffstat (limited to 'sound/pci/hda/hda_intel.c')
-rw-r--r--sound/pci/hda/hda_intel.c158
1 files changed, 123 insertions, 35 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index ebb442dcc02..7be3a9b5533 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -75,6 +75,7 @@ MODULE_PARM_DESC(single_cmd, "Use single command to communicate with codecs "
module_param(enable_msi, int, 0);
MODULE_PARM_DESC(enable_msi, "Enable Message Signaled Interrupt (MSI)");
+/* power_save option is defined in hda_codec.c */
/* just for backward compatibility */
static int enable;
@@ -102,6 +103,18 @@ MODULE_DESCRIPTION("Intel HDA driver");
#define SFX "hda-intel: "
/*
+ * build flags
+ */
+
+/*
+ * reset the HD-audio controller in power save mode.
+ * this may give more power-saving, but will take longer time to
+ * wake up.
+ */
+#define HDA_POWER_SAVE_RESET_CONTROLLER
+
+
+/*
* registers
*/
#define ICH6_REG_GCAP 0x00
@@ -345,6 +358,7 @@ struct azx {
/* flags */
int position_fix;
+ unsigned int running :1;
unsigned int initialized :1;
unsigned int single_cmd :1;
unsigned int polling_mode :1;
@@ -665,6 +679,9 @@ static unsigned int azx_get_response(struct hda_codec *codec)
return azx_rirb_get_response(codec);
}
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+static void azx_power_notify(struct hda_codec *codec);
+#endif
/* reset codec link */
static int azx_reset(struct azx *chip)
@@ -790,19 +807,12 @@ static void azx_stream_stop(struct azx *chip, struct azx_dev *azx_dev)
/*
- * initialize the chip
+ * reset and start the controller registers
*/
static void azx_init_chip(struct azx *chip)
{
- unsigned char reg;
-
- /* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
- * TCSEL == Traffic Class Select Register, which sets PCI express QOS
- * Ensuring these bits are 0 clears playback static on some HD Audio
- * codecs
- */
- pci_read_config_byte (chip->pci, ICH6_PCIREG_TCSEL, &reg);
- pci_write_config_byte(chip->pci, ICH6_PCIREG_TCSEL, reg & 0xf8);
+ if (chip->initialized)
+ return;
/* reset controller */
azx_reset(chip);
@@ -819,22 +829,45 @@ static void azx_init_chip(struct azx *chip)
azx_writel(chip, DPLBASE, (u32)chip->posbuf.addr);
azx_writel(chip, DPUBASE, upper_32bit(chip->posbuf.addr));
+ chip->initialized = 1;
+}
+
+/*
+ * initialize the PCI registers
+ */
+/* update bits in a PCI register byte */
+static void update_pci_byte(struct pci_dev *pci, unsigned int reg,
+ unsigned char mask, unsigned char val)
+{
+ unsigned char data;
+
+ pci_read_config_byte(pci, reg, &data);
+ data &= ~mask;
+ data |= (val & mask);
+ pci_write_config_byte(pci, reg, data);
+}
+
+static void azx_init_pci(struct azx *chip)
+{
+ /* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
+ * TCSEL == Traffic Class Select Register, which sets PCI express QOS
+ * Ensuring these bits are 0 clears playback static on some HD Audio
+ * codecs
+ */
+ update_pci_byte(chip->pci, ICH6_PCIREG_TCSEL, 0x07, 0);
+
switch (chip->driver_type) {
case AZX_DRIVER_ATI:
/* For ATI SB450 azalia HD audio, we need to enable snoop */
- pci_read_config_byte(chip->pci,
- ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR,
- &reg);
- pci_write_config_byte(chip->pci,
- ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR,
- (reg & 0xf8) |
- ATI_SB450_HDAUDIO_ENABLE_SNOOP);
+ update_pci_byte(chip->pci,
+ ATI_SB450_HDAUDIO_MISC_CNTR2_ADDR,
+ 0x07, ATI_SB450_HDAUDIO_ENABLE_SNOOP);
break;
case AZX_DRIVER_NVIDIA:
/* For NVIDIA HDA, enable snoop */
- pci_read_config_byte(chip->pci,NVIDIA_HDA_TRANSREG_ADDR, &reg);
- pci_write_config_byte(chip->pci,NVIDIA_HDA_TRANSREG_ADDR,
- (reg & 0xf0) | NVIDIA_HDA_ENABLE_COHBITS);
+ update_pci_byte(chip->pci,
+ NVIDIA_HDA_TRANSREG_ADDR,
+ 0x0f, NVIDIA_HDA_ENABLE_COHBITS);
break;
}
}
@@ -1007,6 +1040,9 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
bus_temp.pci = chip->pci;
bus_temp.ops.command = azx_send_cmd;
bus_temp.ops.get_response = azx_get_response;
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+ bus_temp.ops.pm_notify = azx_power_notify;
+#endif
err = snd_hda_bus_new(chip->card, &bus_temp, &chip->bus);
if (err < 0)
@@ -1128,9 +1164,11 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
128);
snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
128);
+ snd_hda_power_up(apcm->codec);
err = hinfo->ops.open(hinfo, apcm->codec, substream);
if (err < 0) {
azx_release_device(azx_dev);
+ snd_hda_power_down(apcm->codec);
mutex_unlock(&chip->open_mutex);
return err;
}
@@ -1159,6 +1197,7 @@ static int azx_pcm_close(struct snd_pcm_substream *substream)
spin_unlock_irqrestore(&chip->reg_lock, flags);
azx_release_device(azx_dev);
hinfo->ops.close(hinfo, apcm->codec, substream);
+ snd_hda_power_down(apcm->codec);
mutex_unlock(&chip->open_mutex);
return 0;
}
@@ -1459,6 +1498,48 @@ static int azx_acquire_irq(struct azx *chip, int do_disconnect)
}
+static void azx_stop_chip(struct azx *chip)
+{
+ if (chip->initialized)
+ return;
+
+ /* disable interrupts */
+ azx_int_disable(chip);
+ azx_int_clear(chip);
+
+ /* disable CORB/RIRB */
+ azx_free_cmd_io(chip);
+
+ /* disable position buffer */
+ azx_writel(chip, DPLBASE, 0);
+ azx_writel(chip, DPUBASE, 0);
+
+ chip->initialized = 0;
+}
+
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+/* power-up/down the controller */
+static void azx_power_notify(struct hda_codec *codec)
+{
+ struct azx *chip = codec->bus->private_data;
+ struct hda_codec *c;
+ int power_on = 0;
+
+ list_for_each_entry(c, &codec->bus->codec_list, list) {
+ if (c->power_on) {
+ power_on = 1;
+ break;
+ }
+ }
+ if (power_on)
+ azx_init_chip(chip);
+#ifdef HDA_POWER_SAVE_RESET_CONTROLLER
+ else if (chip->running)
+ azx_stop_chip(chip);
+#endif
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
+
#ifdef CONFIG_PM
/*
* power management
@@ -1473,7 +1554,7 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state)
for (i = 0; i < chip->pcm_devs; i++)
snd_pcm_suspend_all(chip->pcm[i]);
snd_hda_suspend(chip->bus, state);
- azx_free_cmd_io(chip);
+ azx_stop_chip(chip);
if (chip->irq >= 0) {
synchronize_irq(chip->irq);
free_irq(chip->irq, chip);
@@ -1506,8 +1587,12 @@ static int azx_resume(struct pci_dev *pci)
chip->msi = 0;
if (azx_acquire_irq(chip, 1) < 0)
return -EIO;
+ azx_init_pci(chip);
+#ifndef CONFIG_SND_HDA_POWER_SAVE
+ /* the explicit resume is needed only when POWER_SAVE isn't set */
azx_init_chip(chip);
snd_hda_resume(chip->bus);
+#endif
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
@@ -1521,20 +1606,9 @@ static int azx_free(struct azx *chip)
{
if (chip->initialized) {
int i;
-
for (i = 0; i < chip->num_streams; i++)
azx_stream_stop(chip, &chip->azx_dev[i]);
-
- /* disable interrupts */
- azx_int_disable(chip);
- azx_int_clear(chip);
-
- /* disable CORB/RIRB */
- azx_free_cmd_io(chip);
-
- /* disable position buffer */
- azx_writel(chip, DPLBASE, 0);
- azx_writel(chip, DPUBASE, 0);
+ azx_stop_chip(chip);
}
if (chip->irq >= 0) {
@@ -1720,10 +1794,9 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
azx_init_stream(chip);
/* initialize chip */
+ azx_init_pci(chip);
azx_init_chip(chip);
- chip->initialized = 1;
-
/* codec detection */
if (!chip->codec_mask) {
snd_printk(KERN_ERR SFX "no codecs found!\n");
@@ -1750,6 +1823,19 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
return err;
}
+static void power_down_all_codecs(struct azx *chip)
+{
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+ /* The codecs were powered up in snd_hda_codec_new().
+ * Now all initialization done, so turn them down if possible
+ */
+ struct hda_codec *codec;
+ list_for_each_entry(codec, &chip->bus->codec_list, list) {
+ snd_hda_power_down(codec);
+ }
+#endif
+}
+
static int __devinit azx_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
@@ -1800,6 +1886,8 @@ static int __devinit azx_probe(struct pci_dev *pci,
}
pci_set_drvdata(pci, card);
+ chip->running = 1;
+ power_down_all_codecs(chip);
return err;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-09 02:23:19 +0000