This patch is helpful for tracking down bugs without having all
information about the chip.
--
David Henningsson, Canonical Ltd.
http://launchpad.net/~diwic
>From 568a3c0e45396cf6cfd8e8dac13f76f756c7e3f3 Mon Sep 17 00:00:00 2001
From: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
Date: Thu, 19 Aug 2010 18:40:44 +0200
Subject: [PATCH 1/2] Show processing coefficients in codec proc file
Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
---
sound/pci/hda/hda_proc.c | 16 ++++++++++++++--
1 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index f025200..88e40f0 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -467,11 +467,23 @@ static void print_unsol_cap(struct snd_info_buffer *buffer,
static void print_proc_caps(struct snd_info_buffer *buffer,
struct hda_codec *codec, hda_nid_t nid)
{
+ int i, val;
unsigned int proc_caps = snd_hda_param_read(codec, nid,
AC_PAR_PROC_CAP);
+ unsigned int ncoeff = (proc_caps & AC_PCAP_NUM_COEF) >>
+ AC_PCAP_NUM_COEF_SHIFT;
+
snd_iprintf(buffer, " Processing caps: benign=%d, ncoeff=%d\n",
- proc_caps & AC_PCAP_BENIGN,
- (proc_caps & AC_PCAP_NUM_COEF) >> AC_PCAP_NUM_COEF_SHIFT);
+ proc_caps & AC_PCAP_BENIGN, ncoeff);
+ for (i = 0; i < ncoeff; i++) {
+ snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_COEF_INDEX,
+ i);
+ val = snd_hda_codec_read(codec, nid, 0,
+ AC_VERB_GET_PROC_COEF, 0);
+ snd_iprintf(buffer, " Processing coef %d: 0x%x\n", i,
+ val);
+ }
+
}
static void print_conn_list(struct snd_info_buffer *buffer,
--
1.7.0.4
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