diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0064-ASoC-pcm512x-implement-set_tdm_slot-interface.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0064-ASoC-pcm512x-implement-set_tdm_slot-interface.patch | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0064-ASoC-pcm512x-implement-set_tdm_slot-interface.patch b/target/linux/brcm2708/patches-4.19/950-0064-ASoC-pcm512x-implement-set_tdm_slot-interface.patch deleted file mode 100644 index e656c05a55..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0064-ASoC-pcm512x-implement-set_tdm_slot-interface.patch +++ /dev/null @@ -1,80 +0,0 @@ -From 5fd7bb26ef791a7da1c0573b980ab4fe6b9c2641 Mon Sep 17 00:00:00 2001 -From: Matthias Reichl <hias@horus.com> -Date: Thu, 22 Feb 2018 11:55:06 +0100 -Subject: [PATCH] ASoC: pcm512x: implement set_tdm_slot interface - -PCM512x can accept data padded with additional BCLK cycles -but the driver currently lacks an interface to configure this. - -This leads to the problem that S24_LE format in master mode -can result in non-integer clock divisors and pcm512x running -at a rather off rate. - -For example 48kHz with 48fs BCLK and SCLK at 24.576MHz uses -a divisor of 10 (rounded down from 10.6666) and results in a -51.2kHz LRCLK. With 64fs BCLK a divisor of 8 is used and -LRCLK runs at exactly 48kHz. - -Fix this by providing a minimal set_tdm_slot implementation -so machine drivers can optionally configure custom BCLK ratios. - -Signed-off-by: Matthias Reichl <hias@horus.com> ---- - sound/soc/codecs/pcm512x.c | 28 +++++++++++++++++++++++++++- - 1 file changed, 27 insertions(+), 1 deletion(-) - ---- a/sound/soc/codecs/pcm512x.c -+++ b/sound/soc/codecs/pcm512x.c -@@ -53,6 +53,7 @@ struct pcm512x_priv { - unsigned long overclock_pll; - unsigned long overclock_dac; - unsigned long overclock_dsp; -+ int lrclk_div; - }; - - /* -@@ -851,7 +852,10 @@ static int pcm512x_set_dividers(struct s - int fssp; - int gpio; - -- lrclk_div = snd_soc_params_to_frame_size(params); -+ if (pcm512x->lrclk_div) -+ lrclk_div = pcm512x->lrclk_div; -+ else -+ lrclk_div = snd_soc_params_to_frame_size(params); - if (lrclk_div == 0) { - dev_err(dev, "No LRCLK?\n"); - return -EINVAL; -@@ -1319,10 +1323,32 @@ static int pcm512x_set_fmt(struct snd_so - return 0; - } - -+static int pcm512x_set_tdm_slot(struct snd_soc_dai *dai, -+ unsigned int tx_mask, unsigned int rx_mask, -+ int slots, int width) -+{ -+ struct snd_soc_component *component = dai->component; -+ struct pcm512x_priv *pcm512x = snd_soc_component_get_drvdata(component); -+ -+ switch (slots) { -+ case 0: -+ pcm512x->lrclk_div = 0; -+ return 0; -+ case 2: -+ if (tx_mask != 0x03 || rx_mask != 0x03) -+ return -EINVAL; -+ pcm512x->lrclk_div = slots * width; -+ return 0; -+ default: -+ return -EINVAL; -+ } -+} -+ - static const struct snd_soc_dai_ops pcm512x_dai_ops = { - .startup = pcm512x_dai_startup, - .hw_params = pcm512x_hw_params, - .set_fmt = pcm512x_set_fmt, -+ .set_tdm_slot = pcm512x_set_tdm_slot, - }; - - static struct snd_soc_dai_driver pcm512x_dai = { |