Re: ESS 1688

[Rene Herman <rene.herman@keyaccess.nl>]

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On 24-02-08 10:50, Rene Herman wrote:

> Not yet, but I confirm the bug. I'll try and see of I can locate
> anything. No ETA available.

Can you try if applying the attached makes things work as you'd expect with 
respect to the recording levels? Over here it seems to, although I get the 
feeling we might as well rename the control "Distortion Levels" as keeping 
it at 0 is the only sensible thing.

Even if this works, it's not a final fix, just to confirm. Given that you 
posted to alsa-user... if you're not setup to apply this patch (to any semi 
recent source) and recompile the driver I hope someone can help.

With respect to the duplex issue -- there seem to be no docs for 688 and 
1688 which is a bit of a problem.

Rene.

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diff --git a/sound/isa/es1688/es1688_lib.c b/sound/isa/es1688/es1688_lib.c
index 5c26d49..eb35267 100644
--- a/sound/isa/es1688/es1688_lib.c
+++ b/sound/isa/es1688/es1688_lib.c
@@ -368,9 +368,11 @@ static int snd_es1688_playback_prepare(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 	unsigned int count = snd_pcm_lib_period_bytes(substream);
+	int tmp;
 
 	chip->dma_size = size;
 	spin_lock_irqsave(&chip->reg_lock, flags);
+	tmp = snd_es1688_read(chip, 0xb4);
 	snd_es1688_reset(chip);
 	snd_es1688_set_rate(chip, substream);
 	snd_es1688_write(chip, 0xb8, 4);	/* auto init DMA mode */
@@ -403,6 +405,7 @@ static int snd_es1688_playback_prepare(struct snd_pcm_substream *substream)
 	}
 	snd_es1688_write(chip, 0xb1, (snd_es1688_read(chip, 0xb1) & 0x0f) | 0x50);
 	snd_es1688_write(chip, 0xb2, (snd_es1688_read(chip, 0xb2) & 0x0f) | 0x50);
+	snd_es1688_write(chip, 0xb4, tmp);
 	snd_es1688_dsp_command(chip, ES1688_DSP_CMD_SPKON);
 	spin_unlock_irqrestore(&chip->reg_lock, flags);
 	/* --- */
@@ -429,9 +432,11 @@ static int snd_es1688_capture_prepare(struct snd_pcm_substream *substream)
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 	unsigned int count = snd_pcm_lib_period_bytes(substream);
+	int tmp;
 
 	chip->dma_size = size;
 	spin_lock_irqsave(&chip->reg_lock, flags);
+	tmp = snd_es1688_read(chip, 0xb4);
 	snd_es1688_reset(chip);
 	snd_es1688_set_rate(chip, substream);
 	snd_es1688_dsp_command(chip, ES1688_DSP_CMD_SPKOFF);
@@ -461,6 +466,7 @@ static int snd_es1688_capture_prepare(struct snd_pcm_substream *substream)
 	}
 	snd_es1688_write(chip, 0xb1, (snd_es1688_read(chip, 0xb1) & 0x0f) | 0x50);
 	snd_es1688_write(chip, 0xb2, (snd_es1688_read(chip, 0xb2) & 0x0f) | 0x50);
+	snd_es1688_write(chip, 0xb4, tmp);
 	spin_unlock_irqrestore(&chip->reg_lock, flags);
 	/* --- */
 	count = -count;

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