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-rw-r--r--sound/pci/hda/hda_codec.h1
-rw-r--r--sound/pci/hda/hda_proc.c34
2 files changed, 33 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 2b5d19e48a27..ab2a444ba501 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -361,6 +361,7 @@ struct hda_codec {
unsigned int epss:1; /* supporting EPSS? */
unsigned int cached_write:1; /* write only to caches */
unsigned int dp_mst:1; /* support DP1.2 Multi-stream transport */
+ unsigned int dump_coef:1; /* dump processing coefs in codec proc file */
#ifdef CONFIG_PM
unsigned int power_on :1; /* current (global) power-state */
unsigned int d3_stop_clk:1; /* support D3 operation without BCLK */
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index a8cb22eec89e..ce5a6da83419 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -24,9 +24,14 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
+#include <linux/module.h>
#include "hda_codec.h"
#include "hda_local.h"
+static int dump_coef = -1;
+module_param(dump_coef, int, 0644);
+MODULE_PARM_DESC(dump_coef, "Dump processing coefficients in codec proc file (-1=auto, 0=disable, 1=enable)");
+
static char *bits_names(unsigned int bits, char *names[], int size)
{
int i, n;
@@ -488,14 +493,39 @@ static void print_unsol_cap(struct snd_info_buffer *buffer,
(unsol & AC_UNSOL_ENABLED) ? 1 : 0);
}
+static inline bool can_dump_coef(struct hda_codec *codec)
+{
+ switch (dump_coef) {
+ case 0: return false;
+ case 1: return true;
+ default: return codec->dump_coef;
+ }
+}
+
static void print_proc_caps(struct snd_info_buffer *buffer,
struct hda_codec *codec, hda_nid_t nid)
{
+ unsigned int i, ncoeff, oldindex;
unsigned int proc_caps = snd_hda_param_read(codec, nid,
AC_PAR_PROC_CAP);
+ 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);
+
+ if (!can_dump_coef(codec))
+ return;
+
+ /* Note: This is racy - another process could run in parallel and change
+ the coef index too. */
+ oldindex = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_COEF_INDEX, 0);
+ for (i = 0; i < ncoeff; i++) {
+ unsigned int val;
+ 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, " Coeff 0x%02x: 0x%04x\n", i, val);
+ }
+ snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_COEF_INDEX, oldindex);
}
static void print_conn_list(struct snd_info_buffer *buffer,