[PATCH] Fix 96000 SPDIF out from Audigy 2 P16V.

[PATCH] Fix 96000 SPDIF out from Audigy 2 P16V.

[James Courtier-Dutton]

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This allows one to output at 96000 to the SPDIF using the P16V chip.
Note: The sample phase is wrong when using the P16V chip, but at least 
no resampling is done.

Signoff: James Courtier-Dutton

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Index: alsa-driver/alsa-kernel/pci/emu10k1/p16v.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/emu10k1/p16v.c,v
retrieving revision 1.1
diff -u -r1.1 p16v.c
--- alsa-driver/alsa-kernel/pci/emu10k1/p16v.c	13 Mar 2005 12:17:10 -0000	1.1
+++ alsa-driver/alsa-kernel/pci/emu10k1/p16v.c	19 Mar 2005 15:57:46 -0000
@@ -229,22 +229,24 @@
 	u32 *table_base = (u32 *)(emu->p16v_buffer.area+(8*16*channel));
 	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
 	int i;
+	u32 tmp;
 	
         //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
         //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
 	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->p16v_buffer.addr, emu->p16v_buffer.area, emu->p16v_buffer.bytes);
+	tmp = snd_emu10k1_ptr_read(emu, A_SPDIF_SAMPLERATE, channel);
         switch (runtime->rate) {
 	case 44100:
-	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, 0x8000); /* FIXME: This will change the capture rate as well! */
+	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe000) | 0x8000); /* FIXME: This will change the capture rate as well! */
 	  break;
 	case 48000:
-	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, 0x1000); /* FIXME: This will change the capture rate as well! */
+	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe000) | 0x0000); /* FIXME: This will change the capture rate as well! */
 	  break;
 	case 96000:
-	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, 0x4000); /* FIXME: This will change the capture rate as well! */
+	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe000) | 0x4000); /* FIXME: This will change the capture rate as well! */
 	  break;
 	case 192000:
-	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, 0x2000); /* FIXME: This will change the capture rate as well! */
+	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe000) | 0x2000); /* FIXME: This will change the capture rate as well! */
 	  break;
 	default:
 	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, 0x0000); /* FIXME: This will change the capture rate as well! */

Re: [PATCH] Fix 96000 SPDIF out from Audigy 2 P16V.

[Takashi Iwai]

At Sat, 19 Mar 2005 16:02:13 +0000,
James Courtier-Dutton wrote:
> 
> This allows one to output at 96000 to the SPDIF using the P16V chip.
> Note: The sample phase is wrong when using the P16V chip, but at least 
> no resampling is done.
> 
> Signoff: James Courtier-Dutton

Applied to CVS.  Thanks.


Takashi


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