summary'>refs'>logtreecommitdiff'>stats
path: '>root//'>sys-kernel/boest-v5.0.15//'>raspberrypi//0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch
diff options
context:
space:
mode:
Diffstat (limited to 'sys-kernel/boest-v5.0.15/raspberrypi/0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch')
--rw-r--r--sys-kernel/boest-v5.0.15/raspberrypi/0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch8383
1 files changed, 83 insertions, 0 deletions
diff --git a/sys-kernel/boest-v5.0.15/raspberrypi/0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch b/sys-kernel/boest-v5.0.15/raspberrypi/0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch
new file mode 100644
index 00000000..92970053
--- /dev/null
+++ b/sys-kernel/boest-v5.0.15/raspberrypi/0062-ASoC-pcm512x-implement-set_tdm_slot-interface.patch
@@ -0,0 +1,83 @@
+From 3f9ab0b70e1747576080bacd11b6bdbe6d4fe776 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Thu, 22 Feb 2018 11:55:06 +0100
+Subject: [PATCH 062/194] 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(-)
+
+diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
+index 4cc24a5d5c31..e6523e74fdd9 100644
+--- a/sound/soc/codecs/pcm512x.c
++++ b/sound/soc/codecs/pcm512x.c
+@@ -55,6 +55,7 @@ struct pcm512x_priv {
+ unsigned long overclock_dsp;
+ int mute;
+ struct mutex mutex;
++ int lrclk_div;
+ };
+
+ /*
+@@ -915,7 +916,10 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
+ 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;
+@@ -1430,11 +1434,33 @@ static int pcm512x_digital_mute(struct snd_soc_dai *dai, int mute)
+ return ret;
+ }
+
++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,
+ .digital_mute = pcm512x_digital_mute,
++ .set_tdm_slot = pcm512x_set_tdm_slot,
+ };
+
+ static struct snd_soc_dai_driver pcm512x_dai = {