arm: tegra: hda: support for suspend resume

adding support for suspend resume in hda driver

Bug 808190
Bug 808132

Original-Change-Id: I6f142312cffb990ce5dd724b93ecacfc9543e8ae
Reviewed-on: http://git-master/r/24617
Tested-by: Dara Ramesh <dramesh@nvidia.com>
Reviewed-by: Scott Peterson <speterson@nvidia.com>
Change-Id: Ibefd60e840c1bc7e3f646143434f071401f0b15d

3 files changed, 56 insertions, 37 deletions

diff --git a/sound/arm/tegra/hda_tegra.c b/sound/arm/tegra/hda_tegra.c
index 8d27fb05d2bd..af1c26c25fca 100644
--- a/sound/arm/tegra/hda_tegra.c
+++ b/sound/arm/tegra/hda_tegra.c
@@ -448,6 +448,27 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
 	return 0;
 }
 
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+/* power-up/down the controller */
+void azx_power_notify(struct hda_bus *bus)
+{
+	struct azx *chip = bus->private_data;
+	struct hda_codec *c;
+	int power_on = 0;
+
+	list_for_each_entry(c, &bus->codec_list, list) {
+		if (c->power_on) {
+			power_on = 1;
+			break;
+		}
+	}
+	if (power_on)
+		azx_init_chip(chip, 1);
+	else if (chip->running && power_save_controller &&
+		 !bus->power_keep_link_on)
+		azx_stop_chip(chip);
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
 
 
 #ifdef CONFIG_PM
@@ -456,22 +477,11 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
  */
 static int nv_tegra_hda_controller_suspend(struct platform_device *pdev)
 {
-#if 0
-	struct snd_card *card = dev_get_drvdata(&pdev->dev);
-	struct azx *chip = card->private_data;
-	clk_disable(chip->clk);
-#endif
-	return 0;
-}
+	clk_disable(clk_hda2hdmicodec);
+	clk_disable(clk_hda2codec);
+	clk_disable(clk_hda);
 
-static int nv_tegra_hda_controller_resume(struct platform_device *pdev)
-{
-#if 0
-	struct snd_card *card = dev_get_drvdata(&pdev->dev);
-	struct azx *chip = card->private_data;
-	clk_enable(chip->clk);
-#endif
-    return 0;
+	return 0;
 }
 
 static int nv_tegra_azx_suspend(struct platform_device *pdev,
@@ -496,6 +506,15 @@ static int nv_tegra_azx_suspend(struct platform_device *pdev,
 	return nv_tegra_hda_controller_suspend(pdev);
 }
 
+static int nv_tegra_hda_controller_resume(struct platform_device *pdev)
+{
+	clk_enable(clk_hda);
+	clk_enable(clk_hda2codec);
+	clk_enable(clk_hda2hdmicodec);
+
+	return 0;
+}
+
 static int nv_tegra_azx_resume(struct platform_device *pdev)
 {
 	struct snd_card *card = dev_get_drvdata(&pdev->dev);
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 6b5eb7642007..584ce9b2aaa0 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1340,6 +1340,28 @@ out_free:
 	return err;
 }
 
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+/* power-up/down the controller */
+void azx_power_notify(struct hda_bus *bus)
+{
+	struct azx *chip = bus->private_data;
+	struct hda_codec *c;
+	int power_on = 0;
+
+	list_for_each_entry(c, &bus->codec_list, list) {
+		if (c->power_on) {
+			power_on = 1;
+			break;
+		}
+	}
+	if (power_on)
+		azx_init_chip(chip, 1);
+	else if (chip->running && power_save_controller &&
+		 !bus->power_keep_link_on)
+		azx_stop_chip(chip);
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
+
 static void __devexit azx_remove(struct pci_dev *pci)
 {
 	snd_card_free(pci_get_drvdata(pci));
diff --git a/sound/pci/hda/lib_hda_intel.c b/sound/pci/hda/lib_hda_intel.c
index 293480b0308d..1bd917f26620 100644
--- a/sound/pci/hda/lib_hda_intel.c
+++ b/sound/pci/hda/lib_hda_intel.c
@@ -1333,28 +1333,6 @@ void azx_stop_chip(struct azx *chip)
 	chip->initialized = 0;
 }
 
-#ifdef CONFIG_SND_HDA_POWER_SAVE
-/* power-up/down the controller */
-void azx_power_notify(struct hda_bus *bus)
-{
-	struct azx *chip = bus->private_data;
-	struct hda_codec *c;
-	int power_on = 0;
-
-	list_for_each_entry(c, &bus->codec_list, list) {
-		if (c->power_on) {
-			power_on = 1;
-			break;
-		}
-	}
-	if (power_on)
-		azx_init_chip(chip, 1);
-	else if (chip->running && power_save_controller &&
-		 !bus->power_keep_link_on)
-		azx_stop_chip(chip);
-}
-#endif /* CONFIG_SND_HDA_POWER_SAVE */
-
 #ifdef CONFIG_PM
 /*
  * power management