[PATCH] ARM: OMAP: Really apply audio L/R channel interchange fix

>>12) ALSA Audio L/R Channel Interchanges fix
>>http://linux.omap.com/pipermail/linux-omap-open-source/2005-December/005971.html

Can you check if this is really applied? Using most recent git I can
still apply it ;-)
There were two similiar patches: One for OSS (is applied, number 7 of
the list) and this one for ALSA.

sound/arm/omap-aic23.c

@@ -34,6 +34,8 @@
  *
  * 2005-07-29   INdT Kernel Team - Alsa driver for omap osk. Creation of new 
  *                                 file omap-aic23.c
+ *
+ * 2005-12-18   Dirk Behme      - Added L/R Channel Interchange fix as proposed by Ajaya Babu
  */
 
 #include <linux/config.h>
@@ -156,6 +158,20 @@ static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 	.mask = 0,
 };
 
+/*
+ * HW interface start and stop helper functions
+ */
+static int audio_ifc_start(void)
+{
+	omap_mcbsp_start(AUDIO_MCBSP);
+	return 0;
+}
+
+static int audio_ifc_stop(void)
+{
+	omap_mcbsp_stop(AUDIO_MCBSP);
+	return 0;
+}
 
 /*
  * Codec/mcbsp init and configuration section
@@ -243,12 +259,20 @@ static void omap_aic23_audio_init(struct snd_card_omap_aic23 *omap_aic23)
 	    SNDRV_PCM_STREAM_PLAYBACK;
 	omap_aic23->s[SNDRV_PCM_STREAM_PLAYBACK].dma_dev =
 	    OMAP_DMA_MCBSP1_TX;
+	omap_aic23->s[SNDRV_PCM_STREAM_PLAYBACK].hw_start =
+	    audio_ifc_start;
+	omap_aic23->s[SNDRV_PCM_STREAM_PLAYBACK].hw_stop =
+	    audio_ifc_stop;
 
 	omap_aic23->s[SNDRV_PCM_STREAM_CAPTURE].id = "Alsa AIC23 in";
 	omap_aic23->s[SNDRV_PCM_STREAM_CAPTURE].stream_id =
 	    SNDRV_PCM_STREAM_CAPTURE;
 	omap_aic23->s[SNDRV_PCM_STREAM_CAPTURE].dma_dev =
 	    OMAP_DMA_MCBSP1_RX;
+	omap_aic23->s[SNDRV_PCM_STREAM_CAPTURE].hw_start =
+	    audio_ifc_start;
+	omap_aic23->s[SNDRV_PCM_STREAM_CAPTURE].hw_stop =
+	    audio_ifc_stop;
 
 	/* configuring the McBSP */
 	omap_mcbsp_request(AUDIO_MCBSP);

sound/arm/omap-aic23.h

@@ -34,6 +34,7 @@
  *  					original version based in sa1100 driver
  *  					and omap oss driver.
  *
+ *  2005-12-18   Dirk Behme      - Added L/R Channel Interchange fix as proposed by Ajaya Babu
  */
 
 #ifndef __OMAP_AIC23_H
@@ -85,6 +86,8 @@ struct audio_stream {
 	snd_pcm_substream_t *stream;	/* the pcm stream */
 	unsigned linked:1;	/* dma channels linked */
 	int offset;		/* store start position of the last period in the alsa buffer */
+	int (*hw_start)(void);  /* interface to start HW interface, e.g. McBSP */
+	int (*hw_stop)(void);   /* interface to stop HW interface, e.g. McBSP */
 };
 
 /*

sound/arm/omap-alsa-dma.c

@@ -35,6 +35,8 @@
  * 				   omap-audio-dma-intfc.c oss file. Support for aic23 codec.
  * 				   Removal of buffer handling (Alsa does that), modifications
  *	in dma handling and port to alsa structures.
+ *
+ * 2005-12-18   Dirk Behme      - Added L/R Channel Interchange fix as proposed by Ajaya Babu
  */
 
 #include <linux/config.h>
@@ -356,8 +358,10 @@ static int audio_start_dma_chain(struct audio_stream *s)
 	int channel = s->lch[s->dma_q_head];
 	FN_IN;
 	if (!s->started) {
+	 s->hw_stop();	    /* stops McBSP Interface */
 		omap_start_dma(channel);
 		s->started = 1;
+		s->hw_start();	   /* start McBSP interface */
 	}
 	/* else the dma itself will progress forward with out our help */
 	FN_OUT(0);