ASoC: Decouple DAPM from CODECs

Decoupling Dynamic Audio Power Management (DAPM) from codec devices is
required when developing ASoC further. Such as for other ASoC components to
have DAPM widgets or when extending DAPM to handle cross-device paths.

This patch decouples DAPM related variables from struct snd_soc_codec and
moves them to new struct snd_soc_dapm_context that is used to encapsulate
DAPM context of a device. ASoC core and API of DAPM functions are modified
to use DAPM context instead of codec.

This patch does not change current functionality and a large part of changes
come because of structure and internal API changes.

Core implementation is from Liam Girdwood <lrg@slimlogic.co.uk> with some
minor core changes, codecs and machine driver conversions from
Jarkko Nikula <jhnikula@gmail.com>.

Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Cc: Cliff Cai <cliff.cai@analog.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Timur Tabi <timur@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jassi Brar <jassi.brar@samsung.com>
Cc: Daniel Gloeckner <dg@emlix.com>
Cc: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c
index 13b979a71a7c..ac43b6088e2e 100644
--- a/sound/soc/codecs/wm8978.c
+++ b/sound/soc/codecs/wm8978.c
@@ -355,11 +355,12 @@ static const struct snd_soc_dapm_route audio_map[] = {
 
 static int wm8978_add_widgets(struct snd_soc_codec *codec)
 {
-        snd_soc_dapm_new_controls(codec, wm8978_dapm_widgets,
-                                  ARRAY_SIZE(wm8978_dapm_widgets));
+        struct snd_soc_dapm_context *dapm = &codec->dapm;
 
+        snd_soc_dapm_new_controls(dapm, wm8978_dapm_widgets,
+                                  ARRAY_SIZE(wm8978_dapm_widgets));
         /* set up the WM8978 audio map */
-        snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+        snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 
         return 0;
 }
@@ -837,7 +838,7 @@ static int wm8978_set_bias_level(struct snd_soc_codec *codec,
                 /* bit 3: enable bias, bit 2: enable I/O tie off buffer */
                 power1 |= 0xc;
 
-                if (codec->bias_level == SND_SOC_BIAS_OFF) {
+                if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
                         /* Initial cap charge at VMID 5k */
                         snd_soc_write(codec, WM8978_POWER_MANAGEMENT_1,
                                       power1 | 0x3);
@@ -857,7 +858,7 @@ static int wm8978_set_bias_level(struct snd_soc_codec *codec,
 
         dev_dbg(codec->dev, "%s: %d, %x\n", __func__, level, power1);
 
-        codec->bias_level = level;
+        codec->dapm.bias_level = level;
         return 0;
 }