ASoC: rt5682: Add CCF usage for providing I2S clks

There is a need to use RT5682 as DAI clock master for other codecs
within a platform, which means that the DAI clocks are required to
remain, regardless of whether the RT5682 is actually running
playback/capture.

The RT5682 CCF basic functions are implemented almost by the existing
internal functions and asoc apis. It needs a clk provider (rt5682 mclk)
to generate the bclk and wclk outputs.

The RT5682 CCF supports and restricts as below:
1. Fmt of DAI-AIF1 must be configured to master before using CCF.
2. Only accept a 48MHz clk as the clk provider.
3. Only provide a 48kHz wclk and a set of multiples of wclk as bclk.

There are some temporary limitations in this patch until a better
implementation.
Signed-off-by: Derek Fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1582033912-6841-1-git-send-email-derek.fang@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/rt5682.h

@@ -24,6 +24,12 @@ enum rt5682_jd_src {
 	RT5682_JD1,
 };
 
+enum rt5682_dai_clks {
+	RT5682_DAI_WCLK_IDX,
+	RT5682_DAI_BCLK_IDX,
+	RT5682_DAI_NUM_CLKS,
+};
+
 struct rt5682_platform_data {
 
 	int ldo1_en; /* GPIO for LDO1_EN */
@@ -32,6 +38,8 @@ struct rt5682_platform_data {
 	enum rt5682_dmic1_clk_pin dmic1_clk_pin;
 	enum rt5682_jd_src jd_src;
 	unsigned int btndet_delay;
+
+	const char *dai_clk_names[RT5682_DAI_NUM_CLKS];
 };
 
 #endif

sound/soc/codecs/rt5682.h

@@ -841,8 +841,8 @@
 #define RT5682_TDM_M_LP_INV			(0x1 << 1)
 #define RT5682_TDM_MS_MASK			(0x1 << 0)
 #define RT5682_TDM_MS_SFT			0
-#define RT5682_TDM_MS_M				(0x0 << 0)
-#define RT5682_TDM_MS_S				(0x1 << 0)
+#define RT5682_TDM_MS_S				(0x0 << 0)
+#define RT5682_TDM_MS_M				(0x1 << 0)
 
 /* Global Clock Control (0x0080) */
 #define RT5682_SCLK_SRC_MASK			(0x7 << 13)