target/linux/bcm27xx/patches-4.19/950-0740-rpi-wm8804-soundcard-Fixed-MCLKDIV-for-Allo-Digione.patch

   1 From 09ad53f0267e4b5433c27c77b3945d584ac0a6ba Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 22 Oct 2019 08:47:29 +0100
   4 Subject: [PATCH] rpi-wm8804-soundcard: Fixed MCLKDIV for Allo Digione
   5
   6 The Allo Digione board wants a fixed MCLKDIV of 256.
   7
   8 See: https://github.com/raspberrypi/linux/issues/3296
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  sound/soc/bcm/rpi-wm8804-soundcard.c | 10 +++++++---
  13  1 file changed, 7 insertions(+), 3 deletions(-)
  14
  15 --- a/sound/soc/bcm/rpi-wm8804-soundcard.c
  16 +++ b/sound/soc/bcm/rpi-wm8804-soundcard.c
  17 @@ -66,6 +66,11 @@ static struct gpio_desc *snd_clk44gpio;
  18  static struct gpio_desc *snd_clk48gpio;
  19  static int wm8804_samplerate = 0;
  20
  21 +/* Forward declarations */
  22 +static struct snd_soc_dai_link snd_allo_digione_dai[];
  23 +static struct snd_soc_card snd_rpi_wm8804;
  24 +
  25 +
  26  #define CLK_44EN_RATE 22579200UL
  27  #define CLK_48EN_RATE 24576000UL
  28
  29 @@ -90,11 +95,10 @@ static unsigned int snd_rpi_wm8804_enabl
  30  static void snd_rpi_wm8804_clk_cfg(unsigned int samplerate,
  31                 struct wm8804_clk_cfg *clk_cfg)
  32  {
  33 -       clk_cfg->mclk_freq = 0;
  34 -       clk_cfg->mclk_div = 1;
  35         clk_cfg->sysclk_freq = 27000000;
  36
  37 -       if (samplerate <= 96000) {
  38 +       if (samplerate <= 96000 ||
  39 +           snd_rpi_wm8804.dai_link == snd_allo_digione_dai) {
  40                 clk_cfg->mclk_freq = samplerate * 256;
  41                 clk_cfg->mclk_div = WM8804_MCLKDIV_256FS;
  42         } else {