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Commit 775b07de authored by Koro Chen's avatar Koro Chen Committed by Mark Brown
Browse files

ASoC: mediatek: Add suspend/resume callbacks 



This adds suspend/resume callbacks, which are common for each DAI.
To be able to continue the last playback/capture after resume
when suspend was done during a playback/capture, in the callbacks
we do backup/restore of registers which were set before prepare stage.
Registers to be backup/restore are defined in a backup list array.

Signed-off-by: default avatarKoro Chen <koro.chen@mediatek.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 27bc1dd2

sound/soc/mediatek/mtk-afe-common.h

+0 −8
Original line number Diff line number Diff line
@@ -98,12 +98,4 @@ struct mtk_afe_memif { 
	const struct mtk_afe_irq_data *irqdata;

};



struct mtk_afe {

	/* address for ioremap audio hardware register */

	void __iomem *base_addr;

	struct device *dev;

	struct regmap *regmap;

	struct mtk_afe_memif memif[MTK_AFE_MEMIF_NUM];

	struct clk *clocks[MTK_CLK_NUM];

};

#endif

sound/soc/mediatek/mtk-afe-pcm.c

+77 −0
Original line number Diff line number Diff line
@@ -45,18 +45,21 @@ 
/* Memory interface */

#define AFE_DL1_BASE		0x0040

#define AFE_DL1_CUR		0x0044

#define AFE_DL1_END		0x0048

#define AFE_DL2_BASE		0x0050

#define AFE_DL2_CUR		0x0054

#define AFE_AWB_BASE		0x0070

#define AFE_AWB_CUR		0x007c

#define AFE_VUL_BASE		0x0080

#define AFE_VUL_CUR		0x008c

#define AFE_VUL_END		0x0088

#define AFE_DAI_BASE		0x0090

#define AFE_DAI_CUR		0x009c

#define AFE_MOD_PCM_BASE	0x0330

#define AFE_MOD_PCM_CUR		0x033c

#define AFE_HDMI_OUT_BASE	0x0374

#define AFE_HDMI_OUT_CUR	0x0378

#define AFE_HDMI_OUT_END	0x037c



#define AFE_ADDA2_TOP_CON0	0x0600
@@ -127,6 +130,34 @@ enum afe_tdm_ch_start { 
	AFE_TDM_CH_ZERO,

};



static const unsigned int mtk_afe_backup_list[] = {

	AUDIO_TOP_CON0,

	AFE_CONN1,

	AFE_CONN2,

	AFE_CONN7,

	AFE_CONN8,

	AFE_DAC_CON1,

	AFE_DL1_BASE,

	AFE_DL1_END,

	AFE_VUL_BASE,

	AFE_VUL_END,

	AFE_HDMI_OUT_BASE,

	AFE_HDMI_OUT_END,

	AFE_HDMI_CONN0,

	AFE_DAC_CON0,

};



struct mtk_afe {

	/* address for ioremap audio hardware register */

	void __iomem *base_addr;

	struct device *dev;

	struct regmap *regmap;

	struct mtk_afe_memif memif[MTK_AFE_MEMIF_NUM];

	struct clk *clocks[MTK_CLK_NUM];

	unsigned int backup_regs[ARRAY_SIZE(mtk_afe_backup_list)];

	bool suspended;

};



static const struct snd_pcm_hardware mtk_afe_hardware = {

	.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |

		 SNDRV_PCM_INFO_MMAP_VALID),
@@ -722,11 +753,53 @@ static const struct snd_soc_dai_ops mtk_afe_hdmi_ops = { 


};



static int mtk_afe_runtime_suspend(struct device *dev);

static int mtk_afe_runtime_resume(struct device *dev);



static int mtk_afe_dai_suspend(struct snd_soc_dai *dai)

{

	struct mtk_afe *afe = snd_soc_dai_get_drvdata(dai);

	int i;



	dev_dbg(afe->dev, "%s\n", __func__);

	if (pm_runtime_status_suspended(afe->dev) || afe->suspended)

		return 0;



	for (i = 0; i < ARRAY_SIZE(mtk_afe_backup_list); i++)

		regmap_read(afe->regmap, mtk_afe_backup_list[i],

			    &afe->backup_regs[i]);



	afe->suspended = true;

	mtk_afe_runtime_suspend(afe->dev);

	return 0;

}



static int mtk_afe_dai_resume(struct snd_soc_dai *dai)

{

	struct mtk_afe *afe = snd_soc_dai_get_drvdata(dai);

	int i = 0;



	dev_dbg(afe->dev, "%s\n", __func__);

	if (pm_runtime_status_suspended(afe->dev) || !afe->suspended)

		return 0;



	mtk_afe_runtime_resume(afe->dev);



	for (i = 0; i < ARRAY_SIZE(mtk_afe_backup_list); i++)

		regmap_write(afe->regmap, mtk_afe_backup_list[i],

			     afe->backup_regs[i]);



	afe->suspended = false;

	return 0;

}



static struct snd_soc_dai_driver mtk_afe_pcm_dais[] = {

	/* FE DAIs: memory intefaces to CPU */

	{

		.name = "DL1", /* downlink 1 */

		.id = MTK_AFE_MEMIF_DL1,

		.suspend = mtk_afe_dai_suspend,

		.resume = mtk_afe_dai_resume,

		.playback = {

			.stream_name = "DL1",

			.channels_min = 1,
@@ -738,6 +811,8 @@ static struct snd_soc_dai_driver mtk_afe_pcm_dais[] = { 
	}, {

		.name = "VUL", /* voice uplink */

		.id = MTK_AFE_MEMIF_VUL,

		.suspend = mtk_afe_dai_suspend,

		.resume = mtk_afe_dai_resume,

		.capture = {

			.stream_name = "VUL",

			.channels_min = 1,
@@ -774,6 +849,8 @@ static struct snd_soc_dai_driver mtk_afe_hdmi_dais[] = { 
	{

		.name = "HDMI",

		.id = MTK_AFE_MEMIF_HDMI,

		.suspend = mtk_afe_dai_suspend,

		.resume = mtk_afe_dai_resume,

		.playback = {

			.stream_name = "HDMI",

			.channels_min = 2,