Hi, this patch is what i need to use Paul's pxa-ssp.c I2S enchancements on my board.
Basically, it doesn't enforce the "fake" network mode, as i dont need it. And i need _real_ network mode, so i prefer to set SSCR0_MOD only when really using network mode.
And it uses PXA_SSP_FRM_??FS to actually set SSCR0_DataSize() too. This allows me to use 32bit frames for 16 bit stereo audio. (No, I don't want to fake network mode for this, and SSCR0_MOD doesn't work as expected when PXA is slave).
This patch is incremental to the recent patch from Paul Shen.
Signed-off-by: Daniel Ribeiro drwyrm@gmail.com
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c index ed0906e..762cb93 100644 --- a/sound/soc/pxa/pxa-ssp.c +++ b/sound/soc/pxa/pxa-ssp.c @@ -579,7 +579,7 @@ static int pxa_ssp_set_dai_fmt(struct snd_soc_dai *cpu_dai, switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: case SND_SOC_DAIFMT_LEFT_J: - sscr0 |= SSCR0_PSP | SSCR0_MOD; + sscr0 |= SSCR0_PSP; sscr1 |= SSCR1_RWOT | SSCR1_TRAIL;
/* See hw_params() */ @@ -655,7 +655,7 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream, int dma = 0, chn = params_channels(params); u32 sscr0; u32 sspsp; - int frame_width; + int frame_width = 0; int width = snd_pcm_format_physical_width(params_format(params)); int ttsa = ssp_read_reg(ssp, SSTSA) & 0xf;
@@ -698,7 +698,6 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream, sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16)); break; } - ssp_write_reg(ssp, SSCR0, sscr0);
switch (priv->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: @@ -742,6 +741,15 @@ static int pxa_ssp_hw_params(struct snd_pcm_substream *substream, break; }
+ if (frame_width) { + sscr0 &= ~(SSCR0_EDSS | SSCR0_DataSize(16)); + if (frame_width % 48 == 0) + sscr0 |= SSCR0_EDSS | SSCR0_DataSize(8); + else + sscr0 |= SSCR0_EDSS | SSCR0_DataSize(16); + } + ssp_write_reg(ssp, SSCR0, sscr0); + /* When we use a network mode, we always require TDM slots * - complain loudly and fail if they've not been set up yet. */