ALSA: hda: make global snd_print_pcm_bits()

Introduce a global function snd_print_pcm_bits() and use it in the ELD code.
Signed-off-by: NWu Fengguang <wfg@linux.intel.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_eld.c

@@ -455,7 +455,7 @@ void snd_hdmi_show_eld(struct hdmi_eld *e)
 static void hdmi_print_sad_info(int i, struct cea_sad *a,
 				struct snd_info_buffer *buffer)
 {
-	char buf[80];
+	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
 
 	snd_iprintf(buffer, "sad%d_coding_type\t[0x%x] %s\n",
 			i, a->format, cea_audio_coding_type_names[a->format]);
@@ -464,9 +464,11 @@ static void hdmi_print_sad_info(int i, struct cea_sad *a,
 	snd_print_pcm_rates(a->rates, buf, sizeof(buf));
 	snd_iprintf(buffer, "sad%d_rates\t\t[0x%x]%s\n", i, a->rates, buf);
 
-	if (a->format == AUDIO_CODING_TYPE_LPCM)
-		snd_iprintf(buffer, "sad%d_bits\t\t0x%x\n",
-							i, a->sample_bits);
+	if (a->format == AUDIO_CODING_TYPE_LPCM) {
+		snd_print_pcm_bits(a->sample_bits, buf, sizeof(buf));
+		snd_iprintf(buffer, "sad%d_bits\t\t[0x%x]%s\n",
+							i, a->sample_bits, buf);
+	}
 
 	if (a->max_bitrate)
 		snd_iprintf(buffer, "sad%d_max_bitrate\t%d\n",

sound/pci/hda/hda_local.h

@@ -287,6 +287,9 @@ static inline int snd_hda_codec_proc_new(struct hda_codec *codec) { return 0; }
 #define SND_PRINT_RATES_ADVISED_BUFSIZE	80
 void snd_print_pcm_rates(int pcm, char *buf, int buflen);
 
+#define SND_PRINT_BITS_ADVISED_BUFSIZE	16
+void snd_print_pcm_bits(int pcm, char *buf, int buflen);
+
 /*
  * Misc
  */

sound/pci/hda/hda_proc.c

@@ -107,23 +107,33 @@ void snd_print_pcm_rates(int pcm, char *buf, int buflen)
 static void print_pcm_rates(struct snd_info_buffer *buffer, unsigned int pcm)
 {
 	char buf[SND_PRINT_RATES_ADVISED_BUFSIZE];
+
 	pcm &= AC_SUPPCM_RATES;
 	snd_iprintf(buffer, "    rates [0x%x]:", pcm);
 	snd_print_pcm_rates(pcm, buf, sizeof(buf));
 	snd_iprintf(buffer, "%s\n", buf);
 }
 
-static void print_pcm_bits(struct snd_info_buffer *buffer, unsigned int pcm)
+void snd_print_pcm_bits(int pcm, char *buf, int buflen)
 {
 	static unsigned int bits[] = { 8, 16, 20, 24, 32 };
-	int i;
+	int i, j;
+
+	for (i = 0, j = 0; i < ARRAY_SIZE(bits); i++)
+		if (pcm & (1 << i))
+			j += snprintf(buf + j, buflen - j,  " %d", bits[i]);
+
+	buf[j] = '\0'; /* necessary when j == 0 */
+}
+
+static void print_pcm_bits(struct snd_info_buffer *buffer, unsigned int pcm)
+{
+	char buf[SND_PRINT_BITS_ADVISED_BUFSIZE];
 
 	pcm = (pcm >> 16) & 0xff;
 	snd_iprintf(buffer, "    bits [0x%x]:", pcm);
-	for (i = 0; i < ARRAY_SIZE(bits); i++)
-		if (pcm & (1 << i))
-			snd_iprintf(buffer, " %d", bits[i]);
-	snd_iprintf(buffer, "\n");
+	snd_print_pcm_bits(pcm, buf, sizeof(buf));
+	snd_iprintf(buffer, "%s\n", buf);
 }
 
 static void print_pcm_formats(struct snd_info_buffer *buffer,