openwrt/target/linux/bcm27xx/patches-4.19/950-0187-rpi-wm8804-soundcard-configure-wm8804-clocks-only-on.patch
Adrian Schmutzler 7d7aa2fd92 brcm2708: rename target to bcm27xx
This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-14 14:10:51 +01:00

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1.4 KiB
Diff

From f6b133a056e8fde7f4707e2874e204c7d5d671a2 Mon Sep 17 00:00:00 2001
From: Matthias Reichl <hias@horus.com>
Date: Sun, 18 Nov 2018 15:32:28 +0100
Subject: [PATCH] rpi-wm8804-soundcard: configure wm8804 clocks only on
rate change
This should avoid clicks when stopping and immediately afterwards
starting a stream with the same samplerate as before.
Signed-off-by: Matthias Reichl <hias@horus.com>
---
sound/soc/bcm/rpi-wm8804-soundcard.c | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/sound/soc/bcm/rpi-wm8804-soundcard.c
+++ b/sound/soc/bcm/rpi-wm8804-soundcard.c
@@ -64,6 +64,7 @@ struct snd_rpi_wm8804_drvdata {
static struct gpio_desc *snd_clk44gpio;
static struct gpio_desc *snd_clk48gpio;
+static int wm8804_samplerate = 0;
#define CLK_44EN_RATE 22579200UL
#define CLK_48EN_RATE 24576000UL
@@ -117,6 +118,12 @@ static int snd_rpi_wm8804_hw_params(stru
struct wm8804_clk_cfg clk_cfg;
int samplerate = params_rate(params);
+ if (samplerate == wm8804_samplerate)
+ return 0;
+
+ /* clear until all clocks are setup properly */
+ wm8804_samplerate = 0;
+
snd_rpi_wm8804_clk_cfg(samplerate, &clk_cfg);
pr_debug("%s samplerate: %d mclk_freq: %u mclk_div: %u sysclk: %u\n",
@@ -163,6 +170,8 @@ static int snd_rpi_wm8804_hw_params(stru
return ret;
}
+ wm8804_samplerate = samplerate;
+
/* set sampling frequency status bits */
snd_soc_component_update_bits(component, WM8804_SPDTX4, 0x0f,
sampling_freq);