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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /include/sound/soc-dai.h
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'include/sound/soc-dai.h')
-rw-r--r--include/sound/soc-dai.h19
1 files changed, 17 insertions, 2 deletions
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 2df96b138..212eaaf17 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -48,10 +48,25 @@ struct snd_compr_stream;
#define SND_SOC_DAIFMT_GATED (0 << 4) /* clock is gated */
/*
- * DAI hardware signal inversions.
+ * DAI hardware signal polarity.
*
* Specifies whether the DAI can also support inverted clocks for the specified
* format.
+ *
+ * BCLK:
+ * - "normal" polarity means signal is available at rising edge of BCLK
+ * - "inverted" polarity means signal is available at falling edge of BCLK
+ *
+ * FSYNC "normal" polarity depends on the frame format:
+ * - I2S: frame consists of left then right channel data. Left channel starts
+ * with falling FSYNC edge, right channel starts with rising FSYNC edge.
+ * - Left/Right Justified: frame consists of left then right channel data.
+ * Left channel starts with rising FSYNC edge, right channel starts with
+ * falling FSYNC edge.
+ * - DSP A/B: Frame starts with rising FSYNC edge.
+ * - AC97: Frame starts with rising FSYNC edge.
+ *
+ * "Negative" FSYNC polarity is the one opposite of "normal" polarity.
*/
#define SND_SOC_DAIFMT_NB_NF (0 << 8) /* normal bit clock + frame */
#define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
@@ -214,7 +229,7 @@ struct snd_soc_dai_driver {
int (*suspend)(struct snd_soc_dai *dai);
int (*resume)(struct snd_soc_dai *dai);
/* compress dai */
- bool compress_dai;
+ int (*compress_new)(struct snd_soc_pcm_runtime *rtd, int num);
/* DAI is also used for the control bus */
bool bus_control;