ALSA: hda - Allow runtime PM for controller if component notifier is used

Currently we disallow the runtime PM of the HD-audio controller if
it's bound with HDMI/DP on Nvidia / AMD unless it's for dGPU.  This is
for keeping the link up to get the proper notification for ELD
hotplug.

As explained in the commit 37a3a98ef601 ("ALSA: hda - Enable runtime
PM only for discrete GPU"), this keep-power-up behavior is rather a
stop-gap solution until the ELD notification via audio component.
And now we finally got the audio component for these graphics drivers
via commit ade49db337a9 ("ALSA: hda/hdmi - Allow audio component for
AMD/ATI and Nvidia HDMI"), so it's time to change.

This patch makes HD-audio controller again runtime-suspendable when
the device gets bound with audio component in HDMI codec driver.  For
making it easier to access from the codec driver, move the flag into
the common hda_bus object instead of hda_intel flag.  Also rename it
to keep_power, to indicate the actual meaning.

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

1 files changed, 5 insertions, 6 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 4496fce21300..91e71be42fa4 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -356,7 +356,7 @@ enum {
  */
 #ifdef SUPPORT_VGA_SWITCHEROO
 #define use_vga_switcheroo(chip)	((chip)->use_vga_switcheroo)
-#define needs_eld_notify_link(chip)	((chip)->need_eld_notify_link)
+#define needs_eld_notify_link(chip)	((chip)->bus.keep_power)
 #else
 #define use_vga_switcheroo(chip)	0
 #define needs_eld_notify_link(chip)	false
@@ -1145,7 +1145,7 @@ static int azx_runtime_idle(struct device *dev)
 		return -EBUSY;
 
 	/* ELD notification gets broken when HD-audio bus is off */
-	if (needs_eld_notify_link(hda))
+	if (needs_eld_notify_link(chip))
 		return -EBUSY;
 
 	return 0;
@@ -1256,7 +1256,7 @@ static void setup_vga_switcheroo_runtime_pm(struct azx *chip)
 	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
 	struct hda_codec *codec;
 
-	if (hda->use_vga_switcheroo && !hda->need_eld_notify_link) {
+	if (hda->use_vga_switcheroo && !needs_eld_notify_link(chip)) {
 		list_for_each_codec(codec, &chip->bus)
 			codec->auto_runtime_pm = 1;
 		/* reset the power save setup */
@@ -1270,10 +1270,9 @@ static void azx_vs_gpu_bound(struct pci_dev *pci,
 {
 	struct snd_card *card = pci_get_drvdata(pci);
 	struct azx *chip = card->private_data;
-	struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
 
 	if (client_id == VGA_SWITCHEROO_DIS)
-		hda->need_eld_notify_link = 0;
+		chip->bus.keep_power = 0;
 	setup_vga_switcheroo_runtime_pm(chip);
 }
 
@@ -1285,7 +1284,7 @@ static void init_vga_switcheroo(struct azx *chip)
 		dev_info(chip->card->dev,
 			 "Handle vga_switcheroo audio client\n");
 		hda->use_vga_switcheroo = 1;
-		hda->need_eld_notify_link = 1; /* cleared in gpu_bound op */
+		chip->bus.keep_power = 1; /* cleared in either gpu_bound op or codec probe */
 		chip->driver_caps |= AZX_DCAPS_PM_RUNTIME;
 		pci_dev_put(p);
 	}