From 5b8620bb84b2f66b7a776fbfc0d273f6c78d969c Mon Sep 17 00:00:00 2001 From: Mengdong Lin Date: Thu, 5 Dec 2013 18:35:48 -0500 Subject: [PATCH] ALSA: hda - skip depop delay before D3 for Haswell and Valleyview2 display codec This patch skips the default depop delay before D3 for Haswell (10 ms) and Valleyview2 (100 ms) display codec, to reduce codec suspend time. The analog part of display audio is implemented in the external display. Some displays have weak pop noise while others not when suspending, no matter there is the default delay or not. Signed-off-by: Mengdong Lin Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_hdmi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 4098196..1bd637b 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2247,6 +2247,10 @@ static int patch_generic_hdmi(struct hda_codec *codec) intel_haswell_fixup_enable_dp12(codec); } + if (is_haswell(codec) || is_valleyview(codec)) { + codec->depop_delay = 0; + } + if (hdmi_parse_codec(codec) < 0) { codec->spec = NULL; kfree(spec); -- 2.7.4