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ASoC: rt5682: Add CCF usage for providing I2S clks

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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.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Derek Fang
2020-02-18 21:51:51 +08:00
committed by Mark Brown
parent 7036810646
commit ebbfabc16d
3 changed files with 415 additions and 4 deletions
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8
include/sound/rt5682.h
View File

@@ -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