ASoC: Intel: eve: Enable mclk and ssp sclk early

rt5663 and rt5514 needs mclk/sclk early to synchronize its internal
clocks.

Signed-off-by: Naveen M <naveen.m@intel.com>
Signed-off-by: Harsha Priya <harshapriya.n@intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/1571070480-25666-1-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/Kconfig b/sound/soc/intel/boards/Kconfig
index 5c27f7a..5e0e7db 100644 (file)
--- a/sound/soc/intel/boards/Kconfig
+++ b/sound/soc/intel/boards/Kconfig
@@ -320,6 +320,7 @@ config SND_SOC_INTEL_KBL_RT5663_RT5514_MAX98927_MACH
         select SND_SOC_RT5514_SPI
         select SND_SOC_MAX98927
         select SND_SOC_HDAC_HDMI
+       select SND_SOC_INTEL_SKYLAKE_SSP_CLK
         help
           This adds support for ASoC Onboard Codec I2S machine driver. This will
           create an alsa sound card for RT5663 + RT5514 + MAX98927.

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 74dda87..dc09a85 100644 (file)
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -22,6 +22,9 @@
 #include "../../codecs/rt5514.h"
 #include "../../codecs/rt5663.h"
 #include "../../codecs/hdac_hdmi.h"
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
 
 #define KBL_REALTEK_CODEC_DAI "rt5663-aif"
 #define KBL_REALTEK_DMIC_CODEC_DAI "rt5514-aif1"
@@ -50,6 +53,8 @@ struct kbl_codec_private {
        struct snd_soc_jack kabylake_headset;
        struct list_head hdmi_pcm_list;
        struct snd_soc_jack kabylake_hdmi[2];
+       struct clk *mclk;
+       struct clk *sclk;
 };
 
 enum {
@@ -71,6 +76,61 @@ static const struct snd_kcontrol_new kabylake_controls[] = {
        SOC_DAPM_PIN_SWITCH("DMIC"),
 };
 
+static int platform_clock_control(struct snd_soc_dapm_widget *w,
+                       struct snd_kcontrol *k, int  event)
+{
+       struct snd_soc_dapm_context *dapm = w->dapm;
+       struct snd_soc_card *card = dapm->card;
+       struct kbl_codec_private *priv = snd_soc_card_get_drvdata(card);
+       int ret = 0;
+
+       /*
+        * MCLK/SCLK need to be ON early for a successful synchronization of
+        * codec internal clock. And the clocks are turned off during
+        * POST_PMD after the stream is stopped.
+        */
+       switch (event) {
+       case SND_SOC_DAPM_PRE_PMU:
+               /* Enable MCLK */
+               ret = clk_set_rate(priv->mclk, 24000000);
+               if (ret < 0) {
+                       dev_err(card->dev, "Can't set rate for mclk, err: %d\n",
+                               ret);
+                       return ret;
+               }
+
+               ret = clk_prepare_enable(priv->mclk);
+               if (ret < 0) {
+                       dev_err(card->dev, "Can't enable mclk, err: %d\n", ret);
+                       return ret;
+               }
+
+               /* Enable SCLK */
+               ret = clk_set_rate(priv->sclk, 3072000);
+               if (ret < 0) {
+                       dev_err(card->dev, "Can't set rate for sclk, err: %d\n",
+                               ret);
+                       clk_disable_unprepare(priv->mclk);
+                       return ret;
+               }
+
+               ret = clk_prepare_enable(priv->sclk);
+               if (ret < 0) {
+                       dev_err(card->dev, "Can't enable sclk, err: %d\n", ret);
+                       clk_disable_unprepare(priv->mclk);
+               }
+               break;
+       case SND_SOC_DAPM_POST_PMD:
+               clk_disable_unprepare(priv->mclk);
+               clk_disable_unprepare(priv->sclk);
+               break;
+       default:
+               return 0;
+       }
+
+       return 0;
+}
+
 static const struct snd_soc_dapm_widget kabylake_widgets[] = {
        SND_SOC_DAPM_HP("Headphone Jack", NULL),
        SND_SOC_DAPM_MIC("Headset Mic", NULL),
@@ -79,11 +139,15 @@ static const struct snd_soc_dapm_widget kabylake_widgets[] = {
        SND_SOC_DAPM_MIC("DMIC", NULL),
        SND_SOC_DAPM_SPK("HDMI1", NULL),
        SND_SOC_DAPM_SPK("HDMI2", NULL),
+       SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
+                       platform_clock_control, SND_SOC_DAPM_PRE_PMU |
+                       SND_SOC_DAPM_POST_PMD),
 
 };
 
 static const struct snd_soc_dapm_route kabylake_map[] = {
        /* Headphones */
+       { "Headphone Jack", NULL, "Platform Clock" },
        { "Headphone Jack", NULL, "HPOL" },
        { "Headphone Jack", NULL, "HPOR" },
 
@@ -92,6 +156,7 @@ static const struct snd_soc_dapm_route kabylake_map[] = {
        { "Right Spk", NULL, "Right BE_OUT" },
 
        /* other jacks */
+       { "Headset Mic", NULL, "Platform Clock" },
        { "IN1P", NULL, "Headset Mic" },
        { "IN1N", NULL, "Headset Mic" },
 
@@ -643,6 +708,7 @@ static int kabylake_audio_probe(struct platform_device *pdev)
 {
        struct kbl_codec_private *ctx;
        struct snd_soc_acpi_mach *mach;
+       int ret = 0;
 
        ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
        if (!ctx)
@@ -658,6 +724,34 @@ static int kabylake_audio_probe(struct platform_device *pdev)
                dmic_constraints = mach->mach_params.dmic_num == 2 ?
                        &constraints_dmic_2ch : &constraints_dmic_channels;
 
+       ctx->mclk = devm_clk_get(&pdev->dev, "ssp1_mclk");
+       if (IS_ERR(ctx->mclk)) {
+               ret = PTR_ERR(ctx->mclk);
+               if (ret == -ENOENT) {
+                       dev_info(&pdev->dev,
+                               "Failed to get ssp1_mclk, defer probe\n");
+                       return -EPROBE_DEFER;
+               }
+
+               dev_err(&pdev->dev, "Failed to get ssp1_mclk with err:%d\n",
+                                                               ret);
+               return ret;
+       }
+
+       ctx->sclk = devm_clk_get(&pdev->dev, "ssp1_sclk");
+       if (IS_ERR(ctx->sclk)) {
+               ret = PTR_ERR(ctx->sclk);
+               if (ret == -ENOENT) {
+                       dev_info(&pdev->dev,
+                               "Failed to get ssp1_sclk, defer probe\n");
+                       return -EPROBE_DEFER;
+               }
+
+               dev_err(&pdev->dev, "Failed to get ssp1_sclk with err:%d\n",
+                                                               ret);
+               return ret;
+       }
+
        return devm_snd_soc_register_card(&pdev->dev, &kabylake_audio_card);
 }