From: Clemens Ladisch <clemens@ladisch.de>
Date: Fri, 7 Sep 2007 08:44:13 +0000 (+0200)
Subject: [ALSA] cmipci: add msbits constraint for 24-bit format
X-Git-Tag: v2.6.24-rc1~832^2~89
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=57bd68b8b18608cf2729f97fcb984b8521d19551;p=linux.git

[ALSA] cmipci: add msbits constraint for 24-bit format

Add a msbits constraint to the SPDIF output device to indicate that
S32_LE samples use only 24 bits for data.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
---

diff --git a/sound/pci/cmipci.c b/sound/pci/cmipci.c
index a8d6b54143fa..78a23984eac7 100644
--- a/sound/pci/cmipci.c
+++ b/sound/pci/cmipci.c
@@ -1599,8 +1599,10 @@ static int snd_cmipci_playback_spdif_open(struct snd_pcm_substream *substream)
 		return err;
 	if (cm->can_ac3_hw) {
 		runtime->hw = snd_cmipci_playback_spdif;
-		if (cm->chip_version >= 37)
+		if (cm->chip_version >= 37) {
 			runtime->hw.formats |= SNDRV_PCM_FMTBIT_S32_LE;
+			snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
+		}
 		if (cm->chip_version == 68) {
 			runtime->hw.rates |= SNDRV_PCM_RATE_88200 |
 					     SNDRV_PCM_RATE_96000;