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90 lines
2.0 KiB
Diff
90 lines
2.0 KiB
Diff
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From dfc04900c40eb14f9364d56e96db2cc3340a1f21 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 3 Jan 2024 14:43:43 +0000
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Subject: [PATCH] ASoC: dwc: Defer bclk_ratio handling to hw_params
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bclk_ratio is only a factor in clock producer mode, and needs to
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override the default value of num_channels * sample_size.
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Move the bclk_ratio handling into the hw_params method, only latching
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the value in set_bclk_ratio, to address both of those matters.
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See: https://github.com/raspberrypi/linux/issues/5817
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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sound/soc/dwc/dwc-i2s.c | 38 +++++++++++++++++++++-----------------
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sound/soc/dwc/local.h | 1 +
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2 files changed, 22 insertions(+), 17 deletions(-)
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--- a/sound/soc/dwc/dwc-i2s.c
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+++ b/sound/soc/dwc/dwc-i2s.c
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@@ -263,6 +263,25 @@ static int dw_i2s_hw_params(struct snd_p
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return -EINVAL;
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}
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+ if ((dev->capability & DW_I2S_MASTER) && dev->bclk_ratio) {
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+ switch (dev->bclk_ratio) {
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+ case 32:
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+ dev->ccr = 0x00;
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+ break;
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+
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+ case 48:
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+ dev->ccr = 0x08;
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+ break;
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+
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+ case 64:
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+ dev->ccr = 0x10;
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+ break;
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+
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+ default:
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+ return -EINVAL;
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+ }
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+ }
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+
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config->chan_nr = params_channels(params);
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switch (config->chan_nr) {
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@@ -436,23 +455,7 @@ static int dw_i2s_set_bclk_ratio(struct
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dev_dbg(dev->dev, "%s(%d)\n", __func__, ratio);
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- switch (ratio) {
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- case 32:
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- dev->ccr = 0x00;
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- break;
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-
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- case 48:
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- dev->ccr = 0x08;
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- break;
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-
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- case 64:
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- dev->ccr = 0x10;
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- break;
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- default:
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- return -EINVAL;
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- }
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-
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- i2s_write_reg(dev->i2s_base, CCR, dev->ccr);
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+ dev->bclk_ratio = ratio;
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return 0;
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}
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@@ -746,6 +749,7 @@ static int dw_i2s_probe(struct platform_
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}
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}
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+ dev->bclk_ratio = 0;
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dev->i2s_reg_comp1 = I2S_COMP_PARAM_1;
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dev->i2s_reg_comp2 = I2S_COMP_PARAM_2;
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if (pdata) {
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--- a/sound/soc/dwc/local.h
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+++ b/sound/soc/dwc/local.h
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@@ -107,6 +107,7 @@ struct dw_i2s_dev {
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unsigned int quirks;
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unsigned int i2s_reg_comp1;
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unsigned int i2s_reg_comp2;
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+ unsigned int bclk_ratio;
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struct device *dev;
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u32 ccr;
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u32 xfer_resolution;
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