ALSA: hda: Release codec display power during shutdown/reboot

Similarly to the previous patch for the HDA controller make sure here
that codecs also drop the display power reference during shutdown and
reboot.

This fixes a power ref leaked WARN in i915 during shutdown if the HDA
driver is built with CONFIG_PM=n.

Suggested-by: Takashi Iwai <tiwai@suse.de>
References: https://gitlab.freedesktop.org/drm/intel/-/issues/3618
References: https://lore.kernel.org/intel-gfx/s5hzgvhngw6.wl-tiwai@suse.de
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://lore.kernel.org/r/20210623134601.2128663-2-imre.deak@intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: ideak

sound/pci/hda/hda_bind.c

@@ -167,8 +167,11 @@ static void hda_codec_driver_shutdown(struct device *dev)
 {
 	struct hda_codec *codec = dev_to_hda_codec(dev);
 
-	if (!pm_runtime_suspended(dev) && codec->patch_ops.reboot_notify)
-		codec->patch_ops.reboot_notify(codec);
+	if (!pm_runtime_suspended(dev)) {
+		if (codec->patch_ops.reboot_notify)
+			codec->patch_ops.reboot_notify(codec);
+		snd_hda_codec_display_power(codec, false);
+	}
 }
 
 int __hda_codec_driver_register(struct hda_codec_driver *drv, const char *name,

sound/pci/hda/hda_codec.c

@@ -798,7 +798,7 @@ static unsigned int hda_set_power_state(struct hda_codec *codec,
 				unsigned int power_state);
 
 /* enable/disable display power per codec */
-static void codec_display_power(struct hda_codec *codec, bool enable)
+void snd_hda_codec_display_power(struct hda_codec *codec, bool enable)
 {
 	if (codec->display_power_control)
 		snd_hdac_display_power(&codec->bus->core, codec->addr, enable);
@@ -810,7 +810,7 @@ void snd_hda_codec_register(struct hda_codec *codec)
 	if (codec->registered)
 		return;
 	if (device_is_registered(hda_codec_dev(codec))) {
-		codec_display_power(codec, true);
+		snd_hda_codec_display_power(codec, true);
 		pm_runtime_enable(hda_codec_dev(codec));
 		/* it was powered up in snd_hda_codec_new(), now all done */
 		snd_hda_power_down(codec);
@@ -836,7 +836,7 @@ static int snd_hda_codec_dev_free(struct snd_device *device)
 	 */
 	if (codec->core.type == HDA_DEV_LEGACY)
 		snd_hdac_device_unregister(&codec->core);
-	codec_display_power(codec, false);
+	snd_hda_codec_display_power(codec, false);
 
 	/*
 	 * In the case of ASoC HD-audio bus, the device refcount is released in
@@ -2893,7 +2893,7 @@ static int hda_codec_runtime_suspend(struct device *dev)
 	    (codec_has_clkstop(codec) && codec_has_epss(codec) &&
 	     (state & AC_PWRST_CLK_STOP_OK)))
 		snd_hdac_codec_link_down(&codec->core);
-	codec_display_power(codec, false);
+	snd_hda_codec_display_power(codec, false);
 	return 0;
 }
 
@@ -2905,7 +2905,7 @@ static int hda_codec_runtime_resume(struct device *dev)
 	if (!codec->card)
 		return 0;
 
-	codec_display_power(codec, true);
+	snd_hda_codec_display_power(codec, true);
 	snd_hdac_codec_link_up(&codec->core);
 	hda_call_codec_resume(codec);
 	pm_runtime_mark_last_busy(dev);

sound/pci/hda/hda_local.h

@@ -709,6 +709,8 @@ void snd_hdmi_write_eld_info(struct hdmi_eld *eld,
 #define SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE 80
 void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen);
 
+void snd_hda_codec_display_power(struct hda_codec *codec, bool enable);
+
 /*
  */
 #define codec_err(codec, fmt, args...) \