ALSA: x86: Support S32 format

The hardware has the support for the left-aligned 24bit format in
32bit packet.  This corresponds to S32 format in ALSA.  We need to set
the msbits restriction as well to inform user-space that only MSB
24bit are available.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index 80b1ab9..e8f8be2 100644 (file)
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -135,7 +135,8 @@ static const struct snd_pcm_hardware had_pcm_hardware = {
                SNDRV_PCM_INFO_MMAP |
                SNDRV_PCM_INFO_MMAP_VALID |
                SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
-       .formats = SNDRV_PCM_FMTBIT_S24,
+       .formats = (SNDRV_PCM_FMTBIT_S24_LE |
+                   SNDRV_PCM_FMTBIT_S32_LE),
        .rates = SNDRV_PCM_RATE_32000 |
                SNDRV_PCM_RATE_44100 |
                SNDRV_PCM_RATE_48000 |
@@ -249,7 +250,6 @@ static int had_prog_status_reg(struct snd_pcm_substream *substream,
        union aud_cfg cfg_val = {.regval = 0};
        union aud_ch_status_0 ch_stat0 = {.regval = 0};
        union aud_ch_status_1 ch_stat1 = {.regval = 0};
-       int format;
 
        ch_stat0.regx.lpcm_id = (intelhaddata->aes_bits &
                                          IEC958_AES0_NONAUDIO) >> 1;
@@ -289,17 +289,20 @@ static int had_prog_status_reg(struct snd_pcm_substream *substream,
        had_write_register(intelhaddata,
                           AUD_CH_STATUS_0, ch_stat0.regval);
 
-       format = substream->runtime->format;
-
-       if (format == SNDRV_PCM_FORMAT_S16_LE) {
+       switch (substream->runtime->format) {
+#if 0 /* FIXME: not supported yet */
+       case SNDRV_PCM_FORMAT_S16_LE:
                ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_20;
                ch_stat1.regx.wrd_len = SMPL_WIDTH_16BITS;
-       } else if (format == SNDRV_PCM_FORMAT_S24_LE) {
+               break;
+#endif
+       case SNDRV_PCM_FORMAT_S24_LE:
+       case SNDRV_PCM_FORMAT_S32_LE:
                ch_stat1.regx.max_wrd_len = MAX_SMPL_WIDTH_24;
                ch_stat1.regx.wrd_len = SMPL_WIDTH_24BITS;
-       } else {
-               ch_stat1.regx.max_wrd_len = 0;
-               ch_stat1.regx.wrd_len = 0;
+               break;
+       default:
+               return -EINVAL;
        }
 
        had_write_register(intelhaddata,
@@ -333,6 +336,9 @@ static int had_init_audio_ctrl(struct snd_pcm_substream *substream,
        else
                cfg_val.regx.layout = LAYOUT1;
 
+       if (substream->runtime->format == SNDRV_PCM_FORMAT_S32_LE)
+               cfg_val.regx.left_align = 1;
+
        cfg_val.regx.val_bit = 1;
 
        /* fix up the DP bits */
@@ -1050,6 +1056,10 @@ static int had_pcm_open(struct snd_pcm_substream *substream)
        if (retval < 0)
                goto error;
 
+       retval = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
+       if (retval < 0)
+               goto error;
+
        /* expose PCM substream */
        spin_lock_irq(&intelhaddata->had_spinlock);
        intelhaddata->stream_info.substream = substream;