sparc dbri: recording is back

From: Krzysztof Helt ([email protected])

This patch fixes recording after convertion to ring buffered driver. It also contains smaller fixes to the conversion.

---

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@@ -610,10 +610,10 @@ CPU interrupt to signal completion.
 
 Since the DBRI can run in parallel with the CPU, several means of
 synchronization present themselves. The method implemented here is only
-to use the dbri_cmdwait() to wait for execution of batch of sent commands.
+use of the dbri_cmdwait() to wait for execution of batch of sent commands.
 
 A circular command buffer is used here. A new command is being added 
-while other can be executed. The scheme works by adding two WAIT commands
+while another can be executed. The scheme works by adding two WAIT commands
 after each sent batch of commands. When the next batch is prepared it is
 added after the WAIT commands then the WAITs are replaced with single JUMP
 command to the new batch. The the DBRI is forced to reread the last WAIT 

@@ -689,13 +689,13 @@ static void dbri_cmdsend(struct snd_dbri
 	*(dbri->cmdptr) = DBRI_CMD(D_JUMP, 0, 0);
 
 #ifdef DBRI_DEBUG
-	if (cmd > dbri->cmdptr )
+	if (cmd > dbri->cmdptr ) {
 		s32 *ptr;
 
 		for (ptr = dbri->cmdptr; ptr < cmd+2; ptr++) {
 			dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr);
 		}
-	else {
+	} else {
 		s32 *ptr = dbri->cmdptr;
 
 		dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr);

@@ -1141,13 +1141,9 @@ static int setup_descs(struct snd_dbri *
 		return -1;
 	}
 
-	if (streamno == DBRI_PLAY) {
-		dbri->dma->desc[last_desc].word1 |=
-		    DBRI_TD_F | DBRI_TD_B;
-		dbri->dma->desc[last_desc].nda =
-		    dbri->dma_dvma + dbri_dma_off(desc, first_desc);
-		dbri->next_desc[last_desc] = first_desc;
-	}
+	dbri->dma->desc[last_desc].nda =
+	    dbri->dma_dvma + dbri_dma_off(desc, first_desc);
+	dbri->next_desc[last_desc] = first_desc;
 	dbri->pipes[info->pipe].first_desc = first_desc;
 	dbri->pipes[info->pipe].desc = first_desc;
 

@@ -1639,7 +1635,6 @@ static void xmit_descs(struct snd_dbri *
 	if (dbri == NULL)
 		return;		/* Disabled */
 
-	/* First check the recording stream for buffer overflow */
 	info = &dbri->stream_info[DBRI_REC];
 	spin_lock_irqsave(&dbri->lock, flags);
 

@@ -1649,27 +1644,20 @@ static void xmit_descs(struct snd_dbri *
 		dprintk(D_DESC, "xmit_descs rec @ TD %d\n", first_td);
 
 		/* Stream could be closed by the time we run. */
-		if (first_td < 0) {
-			goto play;
-		}
-
-		cmd = dbri_cmdlock(dbri, 2);
-		*(cmd++) = DBRI_CMD(D_SDP, 0,
-				    dbri->pipes[info->pipe].sdp
-				    | D_SDP_P | D_SDP_EVERY | D_SDP_C);
-		*(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td);
-		dbri_cmdsend(dbri, cmd, 2);
+		if (first_td >= 0) {
+			cmd = dbri_cmdlock(dbri, 2);
+			*(cmd++) = DBRI_CMD(D_SDP, 0,
+					    dbri->pipes[info->pipe].sdp
+					    | D_SDP_P | D_SDP_EVERY | D_SDP_C);
+			*(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td);
+			dbri_cmdsend(dbri, cmd, 2);
 
-		/* Reset our admin of the pipe & bytes read. */
-		dbri->pipes[info->pipe].desc = first_td;
+			/* Reset our admin of the pipe. */
+			dbri->pipes[info->pipe].desc = first_td;
+		}
 	}
 
-play:
-	spin_unlock_irqrestore(&dbri->lock, flags);
-
-	/* Now check the playback stream for buffer underflow */
 	info = &dbri->stream_info[DBRI_PLAY];
-	spin_lock_irqsave(&dbri->lock, flags);
 
 	if (info->pipe >= 0) {
 		first_td = dbri->pipes[info->pipe].first_desc;

@@ -1685,7 +1673,7 @@ play:
 			*(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td);
 			dbri_cmdsend(dbri, cmd, 2);
 
-			/* Reset our admin of the pipe & bytes written. */
+			/* Reset our admin of the pipe. */
 			dbri->pipes[info->pipe].desc = first_td;
 		}
 	}

@@ -1755,7 +1743,6 @@ static void reception_complete_intr(stru
 		return;
 	}
 
-	dbri->dma->desc[rd].ba = 0;
 	dbri->pipes[pipe].desc = dbri->next_desc[rd];
 	status = dbri->dma->desc[rd].word1;
 	dbri->dma->desc[rd].word1 = 0;	/* Reset it for next time. */

@@ -1768,18 +1755,6 @@ static void reception_complete_intr(stru
 	dprintk(D_INT, "Recv RD %d, status 0x%02x, len %d\n",
 		rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status));
 
-	/* On the last TD, transmit them all again. */
-#if 0
-	if (dbri->next_desc[rd] == -1) {
-		if (info->left > info->size) {
-			printk(KERN_WARNING
-			       "%d bytes recorded in %d size buffer.\n",
-			       info->left, info->size);
-		}
-		tasklet_schedule(&xmit_descs_task);
-	}
-#endif
-
 	/* Notify ALSA */
 	if (spin_is_locked(&dbri->lock)) {
 		spin_unlock(&dbri->lock);

@@ -2159,7 +2139,7 @@ static snd_pcm_uframes_t snd_dbri_pointe
 	snd_pcm_uframes_t ret;
 
 	ret = bytes_to_frames(substream->runtime, info->offset)
-		% substream->runtime->buffer_size;
+		% (substream->runtime->buffer_size + 1);
 	dprintk(D_USR, "I/O pointer: %ld frames of %ld.\n",
 		ret, substream->runtime->buffer_size);
 	return ret;

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At Wed, 23 Aug 2006 20:10:35 +0200,

Dnia 23-08-2006 o godz. 20:16 Takashi Iwai napisał(a):

to me.

I will recheck if recording works without this change. The last returned pointer value is equal to buffer_size. Your email implies that 0 means "I have full buffer filled with data".

Regards,
Krzysztof

----------------------------------------------------
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At Thu, 24 Aug 2006 08:09:26 +0200,

No, pointer callback returns the current processing DMA position in the ring buffer (called hw_ptr). It doesn't mean how many samples remain.

The amount of remaining sample is calculated in PCM core layer. The PCM layer remembers how many samples are put in the buffer (= appl_ptr), then can easily calculate the remaining samples by (appl_ptr - hw_ptr).

Takashi

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From: Krzysztof Helt ([email protected])

This patch fixes sound recording after the driver convertion to ring buffered version. It also contains small clean ups to the driver.

---

This is repost of the patch against current HG tree. It contains part of the 13th patch as it really belong to this one.

The 12th patch is the same as I posted it (there is no need to change it). Should I repost it as well?

Regards,
Krzysztof

----------------------------------------------------
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--part44ef3a2db03f0--

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Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

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At Fri, 25 Aug 2006 19:58:05 +0200,

Thanks, applied now.

Already applied together with this patch.

Takashi

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642