UPSTREAM: ASoC: simple card: Add mclk-fs property in dai-link
Add mclk-fs ratio property per dai-link sub node. This will
allow to manage several codecs with different ratio.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Bug: 25923642
Patchset: update upstream simple card at here.
(cherry picked from git.kernel.org torvalds/linux.git master
commit 85a4bfd895778960dc2d655087ac7ff442b6ab9e)
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Change-Id: I88c68eb826ecd82ca50b7ee09d2cf10e63ed8b7a
diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index 73bf314..cf3979e 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -16,7 +16,8 @@
connection's sink, the second being the connection's
source.
- simple-audio-card,mclk-fs : Multiplication factor between stream rate and codec
- mclk.
+ mclk. When defined, mclk-fs property defined in
+ dai-link sub nodes are ignored.
- simple-audio-card,hp-det-gpio : Reference to GPIO that signals when
headphones are attached.
- simple-audio-card,mic-det-gpio : Reference to GPIO that signals when
@@ -55,6 +56,9 @@
dai-link uses bit clock inversion.
- frame-inversion : bool property. Add this if the
dai-link uses frame clock inversion.
+- mclk-fs : Multiplication factor between stream
+ rate and codec mclk, applied only for
+ the dai-link.
For backward compatibility the frame-master and bitclock-master
properties can be used as booleans in codec subnode to indicate if the
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 8496efc..3ff76d4 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -26,6 +26,7 @@
struct simple_dai_props {
struct asoc_simple_dai cpu_dai;
struct asoc_simple_dai codec_dai;
+ unsigned int mclk_fs;
} *dai_props;
unsigned int mclk_fs;
int gpio_hp_det;
@@ -77,11 +78,18 @@
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
- unsigned int mclk;
+ struct simple_dai_props *dai_props =
+ &priv->dai_props[rtd - rtd->card->rtd];
+ unsigned int mclk, mclk_fs = 0;
int ret = 0;
- if (priv->mclk_fs) {
- mclk = params_rate(params) * priv->mclk_fs;
+ if (priv->mclk_fs)
+ mclk_fs = priv->mclk_fs;
+ else if (dai_props->mclk_fs)
+ mclk_fs = dai_props->mclk_fs;
+
+ if (mclk_fs) {
+ mclk = params_rate(params) * mclk_fs;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP)
@@ -322,6 +330,7 @@
char prop[128];
char *prefix = "";
int ret, cpu_args;
+ u32 val;
/* For single DAI link & old style of DT node */
if (is_top_level_node)
@@ -347,6 +356,9 @@
if (ret < 0)
goto dai_link_of_err;
+ if (!of_property_read_u32(node, "mclk-fs", &val))
+ dai_props->mclk_fs = val;
+
ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,
&dai_link->cpu_of_node,
&dai_link->cpu_dai_name,
