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ASoC: mediatek: Add suspend/resume callbacks

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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: Koro Chen <koro.chen@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Koro Chen 2015-07-22 17:39:35 +08:00 committed by Mark Brown
parent 27bc1dd244
commit 775b07de4f
2 changed files with 77 additions and 8 deletions
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8
sound/soc/mediatek/mtk-afe-common.h
View file

@ -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

77
sound/soc/mediatek/mtk-afe-pcm.c
View file

@ -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,