The patch
ASoC: ti: davinci-mcasp: Add support for RIGHT_J format
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.4
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
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Thanks, Mark
From 816fe206138a7e3895c3a74fbd326a51df003f70 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi peter.ujfalusi@ti.com Date: Thu, 25 Jul 2019 11:34:11 +0300 Subject: [PATCH] ASoC: ti: davinci-mcasp: Add support for RIGHT_J format
The formater unit's rotation needs to be programmed differently for right aligned bus format to have the data moved to the correct place.
Take the opportunity and simplify the formater unit setup code.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@ti.com Link: https://lore.kernel.org/r/20190725083411.7211-1-peter.ujfalusi@ti.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/ti/davinci-mcasp.c | 43 ++++++++++++++++-------------------- 1 file changed, 19 insertions(+), 24 deletions(-)
diff --git a/sound/soc/ti/davinci-mcasp.c b/sound/soc/ti/davinci-mcasp.c index ac59b509ead5..09ba3d3c70a0 100644 --- a/sound/soc/ti/davinci-mcasp.c +++ b/sound/soc/ti/davinci-mcasp.c @@ -465,6 +465,7 @@ static int davinci_mcasp_set_dai_fmt(struct snd_soc_dai *cpu_dai, /* FS need to be inverted */ inv_fs = true; break; + case SND_SOC_DAIFMT_RIGHT_J: case SND_SOC_DAIFMT_LEFT_J: /* configure a full-word SYNC pulse (LRCLK) */ mcasp_set_bits(mcasp, DAVINCI_MCASP_TXFMCTL_REG, FSXDUR); @@ -758,34 +759,28 @@ static int davinci_config_channel_size(struct davinci_mcasp *mcasp, int sample_width) { u32 fmt; - u32 tx_rotate = (sample_width / 4) & 0x7; + u32 tx_rotate, rx_rotate, slot_width; u32 mask = (1ULL << sample_width) - 1; - u32 slot_width = sample_width; - - /* - * For captured data we should not rotate, inversion and masking is - * enoguh to get the data to the right position: - * Format data from bus after reverse (XRBUF) - * S16_LE: |LSB|MSB|xxx|xxx| |xxx|xxx|MSB|LSB| - * S24_3LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB| - * S24_LE: |LSB|DAT|MSB|xxx| |xxx|MSB|DAT|LSB| - * S32_LE: |LSB|DAT|DAT|MSB| |MSB|DAT|DAT|LSB| - */ - u32 rx_rotate = 0;
+ if (mcasp->slot_width) + slot_width = mcasp->slot_width; + else + slot_width = sample_width; /* - * Setting the tdm slot width either with set_clkdiv() or - * set_tdm_slot() allows us to for example send 32 bits per - * channel to the codec, while only 16 of them carry audio - * payload. + * TX rotation: + * right aligned formats: rotate w/ slot_width + * left aligned formats: rotate w/ sample_width + * + * RX rotation: + * right aligned formats: no rotation needed + * left aligned formats: rotate w/ (slot_width - sample_width) */ - if (mcasp->slot_width) { - /* - * When we have more bclk then it is needed for the - * data, we need to use the rotation to move the - * received samples to have correct alignment. - */ - slot_width = mcasp->slot_width; + if ((mcasp->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK) == + SND_SOC_DAIFMT_RIGHT_J) { + tx_rotate = (slot_width / 4) & 0x7; + rx_rotate = 0; + } else { + tx_rotate = (sample_width / 4) & 0x7; rx_rotate = (slot_width - sample_width) / 4; }