[alsa-devel] [PATCH 1/2] ALSA: hdmi - poll eld at resume time

[Wang Xingchao]

Hdmi driver may not receive intrinsic event from gfx side when
it's in runtime suspend mode. There's no ELD info when exit from
runtime suspend. This patch avoid missing ELD info.

Signed-off-by: Wang Xingchao <xingchao.wang at linux.intel.com>
---
 sound/pci/hda/patch_hdmi.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 7803ddd..cb8ac66 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1868,12 +1868,33 @@ static void generic_hdmi_free(struct hda_codec *codec)
 	kfree(spec);
 }
 
+#ifdef CONFIG_PM
+static int generic_hdmi_resume(struct hda_codec *codec)
+{
+	struct hdmi_spec *spec = codec->spec;
+	int pin_idx;
+
+	generic_hdmi_init(codec);
+	snd_hda_codec_resume_amp(codec);
+	snd_hda_codec_resume_cache(codec);
+
+	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
+		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
+		hdmi_present_sense(per_pin, 1);
+	}
+	return 0;
+}
+#endif
+
 static const struct hda_codec_ops generic_hdmi_patch_ops = {
 	.init			= generic_hdmi_init,
 	.free			= generic_hdmi_free,
 	.build_pcms		= generic_hdmi_build_pcms,
 	.build_controls		= generic_hdmi_build_controls,
 	.unsol_event		= hdmi_unsol_event,
+#ifdef CONFIG_PM
+	.resume 		= generic_hdmi_resume,
+#endif
 };
 
 
-- 
1.8.1.2