From 5f1e71b1cc2cc788c0f452772e2ce5e7430c40c2 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Tue, 18 Nov 2008 11:47:53 +0800 Subject: ALSA: ELD proc interface for HDMI sinks Create /proc/asound/card/eld# to reflect the audio configurations and capabilities of the attached HDMI sink. Some notes: - Shall we show an empty file if the ELD content is not valid? Well it's not that simple. There could be partially populated ELD, and there may be malformed ELD provided by buggy drivers/monitors. So expose ELD as it is. - The ELD retrieval routines rely on the Intel HDA interface, others are/could be universal and independent ones. - How do we name the proc file? If there are going to be two HDMI pins per codec, then the current naming scheme (eld#) will fail. Luckily the user space dependencies should be minimal, so it would be trivial to do the rename if that happens. - The ELD proc file content is designed to be easy for scripts and human reading. Its lines all have the pattern: \t[\t]* where is a keyword in c language, while could be any contents, including white spaces. could also be a null value. Signed-off-by: Wu Fengguang Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_intelhdmi.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sound/pci/hda/patch_intelhdmi.c') diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c index 489278d3d773..c95abc47614f 100644 --- a/sound/pci/hda/patch_intelhdmi.c +++ b/sound/pci/hda/patch_intelhdmi.c @@ -446,6 +446,8 @@ static int patch_intel_hdmi(struct hda_codec *codec) codec->spec = spec; codec->patch_ops = intel_hdmi_patch_ops; + snd_hda_eld_proc_new(codec, &spec->sink); + return 0; } -- cgit v1.2.3