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Message-ID: <1437557975-48183-1-git-send-email-koro.chen@mediatek.com>
Date: Wed, 22 Jul 2015 17:39:35 +0800
From: Koro Chen <koro.chen@...iatek.com>
To: <matthias.bgg@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
<tiwai@...e.de>, <lgirdwood@...il.com>
CC: <srv_heupstream@...iatek.com>,
<linux-mediatek@...ts.infradead.org>, <s.hauer@...gutronix.de>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>,
Koro Chen <koro.chen@...iatek.com>
Subject: [PATCH] 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: Koro Chen <koro.chen@...iatek.com>
---
sound/soc/mediatek/mtk-afe-common.h | 8 ----
sound/soc/mediatek/mtk-afe-pcm.c | 77 +++++++++++++++++++++++++++++++++++++
2 files changed, 77 insertions(+), 8 deletions(-)
diff --git a/sound/soc/mediatek/mtk-afe-common.h b/sound/soc/mediatek/mtk-afe-common.h
index a88b175..cc4393c 100644
--- a/sound/soc/mediatek/mtk-afe-common.h
+++ b/sound/soc/mediatek/mtk-afe-common.h
@@ -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
diff --git a/sound/soc/mediatek/mtk-afe-pcm.c b/sound/soc/mediatek/mtk-afe-pcm.c
index de38d2e..55471ee 100644
--- a/sound/soc/mediatek/mtk-afe-pcm.c
+++ b/sound/soc/mediatek/mtk-afe-pcm.c
@@ -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,
--
1.8.1.1.dirty
--
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