ASoC: Improve WM8994 digital power sequencing

On WM8994 revision D and earlier ensure optimal sequencing with
simultaneous usage of AIF1 and AIF2 by tying the signals together
so if paths through both are connected the streams are started
simultaneously.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: stable@kernel.org

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 3e308ad97ddfd05d4303a03792354fede3a706c5..37b8aa8a680f39645b07965e9e72d49c67a6f8b3 100644 (file)
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -1584,6 +1584,13 @@ static const struct snd_soc_dapm_route intercon[] = {
        { "Right Headphone Mux", "DAC", "DAC1R" },
 };
 
+static const struct snd_soc_dapm_route wm8994_revd_intercon[] = {
+       { "AIF1DACDAT", NULL, "AIF2DACDAT" },
+       { "AIF2DACDAT", NULL, "AIF1DACDAT" },
+       { "AIF1ADCDAT", NULL, "AIF2ADCDAT" },
+       { "AIF2ADCDAT", NULL, "AIF1ADCDAT" },
+};
+
 static const struct snd_soc_dapm_route wm8994_intercon[] = {
        { "AIF2DACL", NULL, "AIF2DAC Mux" },
        { "AIF2DACR", NULL, "AIF2DAC Mux" },
@@ -3135,6 +3142,11 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec)
        case WM8994:
                snd_soc_dapm_add_routes(dapm, wm8994_intercon,
                                        ARRAY_SIZE(wm8994_intercon));
+
+               if (wm8994->revision < 4)
+                       snd_soc_dapm_add_routes(dapm, wm8994_revd_intercon,
+                                               ARRAY_SIZE(wm8994_revd_intercon));
+                       
                break;
        case WM8958:
                snd_soc_dapm_add_routes(dapm, wm8958_intercon,