[alsa-devel] [PATCH V2] ALSA: hda - add power states information in proc

[Wang Xingchao]

add more power states information:
- reset status
- clock stop ok
- power states error

Output like:
Power: setting=D0, actual=D0, Error, Clock-stop-OK, Setting-reset

Signed-off-by: Wang Xingchao <xingchao.wang at intel.com>
---
 sound/pci/hda/hda_codec.h |    3 +++
 sound/pci/hda/hda_proc.c  |    9 ++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 4fc3960..71864cdd 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -323,6 +323,9 @@ enum {
 #define AC_PWRST_D1			0x01
 #define AC_PWRST_D2			0x02
 #define AC_PWRST_D3			0x03
+#define AC_PWRST_ERROR                  (1<<8)
+#define AC_PWRST_CLK_STOP_OK            (1<<9)
+#define AC_PWRST_SETTING_RESET          (1<<10)
 
 /* Processing capabilies */
 #define AC_PCAP_BENIGN			(1<<0)
diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c
index e59e2f0..79d0188 100644
--- a/sound/pci/hda/hda_proc.c
+++ b/sound/pci/hda/hda_proc.c
@@ -455,10 +455,17 @@ static void print_power_state(struct snd_info_buffer *buffer,
 		snd_iprintf(buffer, "  Power states: %s\n",
 			    bits_names(sup, names, ARRAY_SIZE(names)));
 
-	snd_iprintf(buffer, "  Power: setting=%s, actual=%s\n",
+	snd_iprintf(buffer, "  Power: setting=%s, actual=%s",
 		    get_pwr_state(pwr & AC_PWRST_SETTING),
 		    get_pwr_state((pwr & AC_PWRST_ACTUAL) >>
 				  AC_PWRST_ACTUAL_SHIFT));
+	if (pwr & AC_PWRST_ERROR)
+		snd_iprintf(buffer, " , Error");
+	if (pwr & AC_PWRST_CLK_STOP_OK)
+		snd_iprintf(buffer, " , Clock-stop-OK");
+	if (pwr & AC_PWRST_SETTING_RESET)
+		snd_iprintf(buffer, " , Setting-reset");
+	snd_iprintf(buffer, "\n");
 }
 
 static void print_unsol_cap(struct snd_info_buffer *buffer,
-- 
1.7.9.5