ASoC: omap-hdmi-audio: Set buffer bytes step constraint to 128

Set buffer bytes step constraint to 128. A matching constraint has
already been set to period size. This helps PCM setup to tolerate ALSA
clients that set the PCM hw params in unusual order.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/sound/soc/omap/omap-hdmi-audio.c b/sound/soc/omap/omap-hdmi-audio.c
index aeef25c0cb3d..584b2372339e 100644
--- a/sound/soc/omap/omap-hdmi-audio.c
+++ b/sound/soc/omap/omap-hdmi-audio.c
@@ -81,7 +81,15 @@ static int hdmi_dai_startup(struct snd_pcm_substream *substream,
         ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
                                          SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
         if (ret < 0) {
-                dev_err(dai->dev, "could not apply constraint\n");
+                dev_err(dai->dev, "Could not apply period constraint: %d\n",
+                        ret);
+                return ret;
+        }
+        ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
+                                         SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128);
+        if (ret < 0) {
+                dev_err(dai->dev, "Could not apply buffer constraint: %d\n",
+                        ret);
                 return ret;
         }