Add support for RT5682 codec in machine driver.
Signed-off-by: Vijendar Mukunda <[email protected]>
---
v2->v3: updated SPDX license
v1->v2: updated kconfig, spdx license, removed unnecessary
initialization and updated comment
sound/soc/amd/Kconfig | 5 +-
sound/soc/amd/acp-da7219-max98357a.c | 380 +++++++++++++++++++++++++++++++----
2 files changed, 343 insertions(+), 42 deletions(-)
diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig
index a6ce000..43f5d29 100644
--- a/sound/soc/amd/Kconfig
+++ b/sound/soc/amd/Kconfig
@@ -5,14 +5,15 @@ config SND_SOC_AMD_ACP
This option enables ACP DMA support on AMD platform.
config SND_SOC_AMD_CZ_DA7219MX98357_MACH
- tristate "AMD CZ support for DA7219 and MAX9835"
+ tristate "AMD CZ support for DA7219, RT5682 and MAX9835"
select SND_SOC_DA7219
+ select SND_SOC_RT5682_I2C
select SND_SOC_MAX98357A
select SND_SOC_ADAU7002
select REGULATOR
depends on SND_SOC_AMD_ACP && I2C && GPIOLIB
help
- This option enables machine driver for DA7219 and MAX9835.
+ This option enables machine driver for DA7219, RT5682 and MAX9835.
config SND_SOC_AMD_CZ_RT5645_MACH
tristate "AMD CZ support for RT5645"
diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-da7219-max98357a.c
index 849288d..fb7aa74 100644
--- a/sound/soc/amd/acp-da7219-max98357a.c
+++ b/sound/soc/amd/acp-da7219-max98357a.c
@@ -1,27 +1,8 @@
-/*
- * Machine driver for AMD ACP Audio engine using DA7219 & MAX98357 codec
- *
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- */
+// SPDX-License-Identifier: MIT
+//
+// Machine driver for AMD ACP Audio engine using DA7219, RT5682 & MAX98357 codec
+//
+//Copyright 2017-2021 Advanced Micro Devices, Inc.
#include <sound/core.h>
#include <sound/soc.h>
@@ -41,14 +22,19 @@
#include "acp.h"
#include "../codecs/da7219.h"
#include "../codecs/da7219-aad.h"
+#include "../codecs/rt5682.h"
#define CZ_PLAT_CLK 48000000
#define DUAL_CHANNEL 2
+#define RT5682_PLL_FREQ (48000 * 512)
static struct snd_soc_jack cz_jack;
static struct clk *da7219_dai_wclk;
static struct clk *da7219_dai_bclk;
-extern bool bt_uart_enable;
+static struct clk *rt5682_dai_wclk;
+static struct clk *rt5682_dai_bclk;
+extern int bt_uart_enable;
+void *soc_is_rltk_max(struct device *dev);
static int cz_da7219_init(struct snd_soc_pcm_runtime *rtd)
{
@@ -128,6 +114,88 @@ static void da7219_clk_disable(void)
clk_disable_unprepare(da7219_dai_bclk);
}
+static int cz_rt5682_init(struct snd_soc_pcm_runtime *rtd)
+{
+ int ret;
+ struct snd_soc_card *card = rtd->card;
+ struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
+ struct snd_soc_component *component = codec_dai->component;
+
+ dev_info(codec_dai->dev, "codec dai name = %s\n", codec_dai->name);
+
+ /* Set codec sysclk */
+ ret = snd_soc_dai_set_sysclk(codec_dai, RT5682_SCLK_S_PLL2,
+ RT5682_PLL_FREQ, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ dev_err(codec_dai->dev,
+ "Failed to set rt5682 SYSCLK: %d\n", ret);
+ return ret;
+ }
+ /* set codec PLL */
+ ret = snd_soc_dai_set_pll(codec_dai, RT5682_PLL2, RT5682_PLL2_S_MCLK,
+ CZ_PLAT_CLK, RT5682_PLL_FREQ);
+ if (ret < 0) {
+ dev_err(codec_dai->dev, "can't set rt5682 PLL: %d\n", ret);
+ return ret;
+ }
+
+ rt5682_dai_wclk = devm_clk_get(component->dev, "rt5682-dai-wclk");
+ if (IS_ERR(rt5682_dai_wclk))
+ return PTR_ERR(rt5682_dai_wclk);
+
+ rt5682_dai_bclk = devm_clk_get(component->dev, "rt5682-dai-bclk");
+ if (IS_ERR(rt5682_dai_bclk))
+ return PTR_ERR(rt5682_dai_bclk);
+
+ ret = snd_soc_card_jack_new(card, "Headset Jack",
+ SND_JACK_HEADSET | SND_JACK_LINEOUT |
+ SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+ SND_JACK_BTN_2 | SND_JACK_BTN_3,
+ &cz_jack, NULL, 0);
+ if (ret) {
+ dev_err(card->dev, "HP jack creation failed %d\n", ret);
+ return ret;
+ }
+
+ snd_jack_set_key(cz_jack.jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
+ snd_jack_set_key(cz_jack.jack, SND_JACK_BTN_1, KEY_VOLUMEUP);
+ snd_jack_set_key(cz_jack.jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN);
+ snd_jack_set_key(cz_jack.jack, SND_JACK_BTN_3, KEY_VOICECOMMAND);
+
+ ret = snd_soc_component_set_jack(component, &cz_jack, NULL);
+ if (ret) {
+ dev_err(rtd->dev, "Headset Jack call-back failed: %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int rt5682_clk_enable(struct snd_pcm_substream *substream)
+{
+ int ret;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+
+ /*
+ * Set wclk to 48000 because the rate constraint of this driver is
+ * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is
+ * minimum of 64x the LRCLK sample rate." RT5682 is the only clk
+ * source so for all codecs we have to limit bclk to 64X lrclk.
+ */
+ clk_set_rate(rt5682_dai_wclk, 48000);
+ clk_set_rate(rt5682_dai_bclk, 48000 * 64);
+ ret = clk_prepare_enable(rt5682_dai_bclk);
+ if (ret < 0) {
+ dev_err(rtd->dev, "can't enable master clock %d\n", ret);
+ return ret;
+ }
+ return ret;
+}
+
+static void rt5682_clk_disable(void)
+{
+ clk_disable_unprepare(rt5682_dai_bclk);
+}
+
static const unsigned int channels[] = {
DUAL_CHANNEL,
};
@@ -260,6 +328,118 @@ static void cz_da7219_shutdown(struct snd_pcm_substream *substream)
da7219_clk_disable();
}
+static int cz_rt5682_play_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ /*
+ * On this platform for PCM device we support stereo
+ */
+
+ runtime->hw.channels_max = DUAL_CHANNEL;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+
+ machine->play_i2s_instance = I2S_SP_INSTANCE;
+ return rt5682_clk_enable(substream);
+}
+
+static int cz_rt5682_cap_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ /*
+ * On this platform for PCM device we support stereo
+ */
+
+ runtime->hw.channels_max = DUAL_CHANNEL;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+
+ machine->cap_i2s_instance = I2S_SP_INSTANCE;
+ machine->capture_channel = CAP_CHANNEL1;
+ return rt5682_clk_enable(substream);
+}
+
+static int cz_rt5682_max_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ /*
+ * On this platform for PCM device we support stereo
+ */
+
+ runtime->hw.channels_max = DUAL_CHANNEL;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+
+ machine->play_i2s_instance = I2S_BT_INSTANCE;
+ return rt5682_clk_enable(substream);
+}
+
+static int cz_rt5682_dmic0_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ /*
+ * On this platform for PCM device we support stereo
+ */
+
+ runtime->hw.channels_max = DUAL_CHANNEL;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+
+ machine->cap_i2s_instance = I2S_BT_INSTANCE;
+ return rt5682_clk_enable(substream);
+}
+
+static int cz_rt5682_dmic1_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct snd_soc_card *card = rtd->card;
+ struct acp_platform_info *machine = snd_soc_card_get_drvdata(card);
+
+ /*
+ * On this platform for PCM device we support stereo
+ */
+
+ runtime->hw.channels_max = DUAL_CHANNEL;
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+ snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+
+ machine->cap_i2s_instance = I2S_SP_INSTANCE;
+ machine->capture_channel = CAP_CHANNEL0;
+ return rt5682_clk_enable(substream);
+}
+
+static void cz_rt5682_shutdown(struct snd_pcm_substream *substream)
+{
+ rt5682_clk_disable();
+}
+
static const struct snd_soc_ops cz_da7219_play_ops = {
.startup = cz_da7219_play_startup,
.shutdown = cz_da7219_shutdown,
@@ -285,6 +465,31 @@ static const struct snd_soc_ops cz_dmic1_cap_ops = {
.shutdown = cz_da7219_shutdown,
};
+static const struct snd_soc_ops cz_rt5682_play_ops = {
+ .startup = cz_rt5682_play_startup,
+ .shutdown = cz_rt5682_shutdown,
+};
+
+static const struct snd_soc_ops cz_rt5682_cap_ops = {
+ .startup = cz_rt5682_cap_startup,
+ .shutdown = cz_rt5682_shutdown,
+};
+
+static const struct snd_soc_ops cz_rt5682_max_play_ops = {
+ .startup = cz_rt5682_max_startup,
+ .shutdown = cz_rt5682_shutdown,
+};
+
+static const struct snd_soc_ops cz_rt5682_dmic0_cap_ops = {
+ .startup = cz_rt5682_dmic0_startup,
+ .shutdown = cz_rt5682_shutdown,
+};
+
+static const struct snd_soc_ops cz_rt5682_dmic1_cap_ops = {
+ .startup = cz_rt5682_dmic1_startup,
+ .shutdown = cz_rt5682_shutdown,
+};
+
SND_SOC_DAILINK_DEF(designware1,
DAILINK_COMP_ARRAY(COMP_CPU("designware-i2s.1.auto")));
SND_SOC_DAILINK_DEF(designware2,
@@ -294,6 +499,8 @@ SND_SOC_DAILINK_DEF(designware3,
SND_SOC_DAILINK_DEF(dlgs,
DAILINK_COMP_ARRAY(COMP_CODEC("i2c-DLGS7219:00", "da7219-hifi")));
+SND_SOC_DAILINK_DEF(rt5682,
+ DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10EC5682:00", "rt5682-aif1")));
SND_SOC_DAILINK_DEF(mx,
DAILINK_COMP_ARRAY(COMP_CODEC("MX98357A:00", "HiFi")));
SND_SOC_DAILINK_DEF(adau,
@@ -353,6 +560,57 @@ static struct snd_soc_dai_link cz_dai_7219_98357[] = {
},
};
+static struct snd_soc_dai_link cz_dai_5682_98357[] = {
+ {
+ .name = "amd-rt5682-play",
+ .stream_name = "Playback",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM,
+ .init = cz_rt5682_init,
+ .dpcm_playback = 1,
+ .ops = &cz_rt5682_play_ops,
+ SND_SOC_DAILINK_REG(designware1, rt5682, platform),
+ },
+ {
+ .name = "amd-rt5682-cap",
+ .stream_name = "Capture",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM,
+ .dpcm_capture = 1,
+ .ops = &cz_rt5682_cap_ops,
+ SND_SOC_DAILINK_REG(designware2, rt5682, platform),
+ },
+ {
+ .name = "amd-max98357-play",
+ .stream_name = "HiFi Playback",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM,
+ .dpcm_playback = 1,
+ .ops = &cz_rt5682_max_play_ops,
+ SND_SOC_DAILINK_REG(designware3, mx, platform),
+ },
+ {
+ /* C panel DMIC */
+ .name = "dmic0",
+ .stream_name = "DMIC0 Capture",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM,
+ .dpcm_capture = 1,
+ .ops = &cz_rt5682_dmic0_cap_ops,
+ SND_SOC_DAILINK_REG(designware3, adau, platform),
+ },
+ {
+ /* A/B panel DMIC */
+ .name = "dmic1",
+ .stream_name = "DMIC1 Capture",
+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
+ | SND_SOC_DAIFMT_CBM_CFM,
+ .dpcm_capture = 1,
+ .ops = &cz_rt5682_dmic1_cap_ops,
+ SND_SOC_DAILINK_REG(designware2, adau, platform),
+ },
+};
+
static const struct snd_soc_dapm_widget cz_widgets[] = {
SND_SOC_DAPM_HP("Headphones", NULL),
SND_SOC_DAPM_SPK("Speakers", NULL),
@@ -368,6 +626,14 @@ static const struct snd_soc_dapm_route cz_audio_route[] = {
{"PDM_DAT", NULL, "Int Mic"},
};
+static const struct snd_soc_dapm_route cz_rt5682_audio_route[] = {
+ {"Headphones", NULL, "HPOL"},
+ {"Headphones", NULL, "HPOR"},
+ {"IN1P", NULL, "Headset Mic"},
+ {"Speakers", NULL, "Speaker"},
+ {"PDM_DAT", NULL, "Int Mic"},
+};
+
static const struct snd_kcontrol_new cz_mc_controls[] = {
SOC_DAPM_PIN_SWITCH("Headphones"),
SOC_DAPM_PIN_SWITCH("Speakers"),
@@ -388,6 +654,28 @@ static struct snd_soc_card cz_card = {
.num_controls = ARRAY_SIZE(cz_mc_controls),
};
+static struct snd_soc_card cz_rt5682_card = {
+ .name = "acpr5682m98357",
+ .owner = THIS_MODULE,
+ .dai_link = cz_dai_5682_98357,
+ .num_links = ARRAY_SIZE(cz_dai_5682_98357),
+ .dapm_widgets = cz_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(cz_widgets),
+ .dapm_routes = cz_rt5682_audio_route,
+ .controls = cz_mc_controls,
+ .num_controls = ARRAY_SIZE(cz_mc_controls),
+};
+
+void *soc_is_rltk_max(struct device *dev)
+{
+ const struct acpi_device_id *match;
+
+ match = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!match)
+ return NULL;
+ return (void *)match->driver_data;
+}
+
static struct regulator_consumer_supply acp_da7219_supplies[] = {
REGULATOR_SUPPLY("VDD", "i2c-DLGS7219:00"),
REGULATOR_SUPPLY("VDDMIC", "i2c-DLGS7219:00"),
@@ -425,29 +713,39 @@ static int cz_probe(struct platform_device *pdev)
struct snd_soc_card *card;
struct acp_platform_info *machine;
struct regulator_dev *rdev;
-
- acp_da7219_cfg.dev = &pdev->dev;
- rdev = devm_regulator_register(&pdev->dev, &acp_da7219_desc,
- &acp_da7219_cfg);
- if (IS_ERR(rdev)) {
- dev_err(&pdev->dev, "Failed to register regulator: %d\n",
- (int)PTR_ERR(rdev));
- return -EINVAL;
+ struct device *dev = &pdev->dev;
+
+ card = (struct snd_soc_card *)soc_is_rltk_max(dev);
+ if (!card)
+ return -ENODEV;
+ if (!strcmp(card->name, "acpd7219m98357")) {
+ acp_da7219_cfg.dev = &pdev->dev;
+ rdev = devm_regulator_register(&pdev->dev, &acp_da7219_desc,
+ &acp_da7219_cfg);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "Failed to register regulator: %d\n",
+ (int)PTR_ERR(rdev));
+ return -EINVAL;
+ }
}
machine = devm_kzalloc(&pdev->dev, sizeof(struct acp_platform_info),
GFP_KERNEL);
if (!machine)
return -ENOMEM;
- card = &cz_card;
- cz_card.dev = &pdev->dev;
+ card->dev = &pdev->dev;
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, machine);
- ret = devm_snd_soc_register_card(&pdev->dev, &cz_card);
+ ret = devm_snd_soc_register_card(&pdev->dev, card);
if (ret) {
- dev_err(&pdev->dev,
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
"devm_snd_soc_register_card(%s) failed: %d\n",
- cz_card.name, ret);
+ card->name, ret);
+ else
+ dev_dbg(&pdev->dev,
+ "devm_snd_soc_register_card(%s) probe deferred: %d\n",
+ card->name, ret);
return ret;
}
bt_uart_enable = !device_property_read_bool(&pdev->dev,
@@ -457,7 +755,8 @@ static int cz_probe(struct platform_device *pdev)
#ifdef CONFIG_ACPI
static const struct acpi_device_id cz_audio_acpi_match[] = {
- { "AMD7219", 0 },
+ { "AMD7219", (unsigned long)&cz_card },
+ { "AMDI5682", (unsigned long)&cz_rt5682_card},
{},
};
MODULE_DEVICE_TABLE(acpi, cz_audio_acpi_match);
@@ -475,5 +774,6 @@ static struct platform_driver cz_pcm_driver = {
module_platform_driver(cz_pcm_driver);
MODULE_AUTHOR("[email protected]");
-MODULE_DESCRIPTION("DA7219 & MAX98357A audio support");
+MODULE_AUTHOR("[email protected]");
+MODULE_DESCRIPTION("DA7219, RT5682 & MAX98357A audio support");
MODULE_LICENSE("GPL v2");
--
2.7.4
> +static int rt5682_clk_enable(struct snd_pcm_substream *substream)
> +{
> + int ret;
> + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
> +
> + /*
> + * Set wclk to 48000 because the rate constraint of this driver is
> + * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is
> + * minimum of 64x the LRCLK sample rate." RT5682 is the only clk
> + * source so for all codecs we have to limit bclk to 64X lrclk.
> + */
> + clk_set_rate(rt5682_dai_wclk, 48000);
> + clk_set_rate(rt5682_dai_bclk, 48000 * 64);
> + ret = clk_prepare_enable(rt5682_dai_bclk);
> + if (ret < 0) {
> + dev_err(rtd->dev, "can't enable master clock %d\n", ret);
> + return ret;
> + }
> + return ret;
> +}
Out of curiosity, is there a reason why you use clk_prepare_enable() for
the bclk but not for the wclk?
On 15/03/21 9:30 pm, Pierre-Louis Bossart wrote:
>
>> +static int rt5682_clk_enable(struct snd_pcm_substream *substream)
>> +{
>> + int ret;
>> + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
>> +
>> + /*
>> + * Set wclk to 48000 because the rate constraint of this driver is
>> + * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is
>> + * minimum of 64x the LRCLK sample rate." RT5682 is the only clk
>> + * source so for all codecs we have to limit bclk to 64X lrclk.
>> + */
>> + clk_set_rate(rt5682_dai_wclk, 48000);
>> + clk_set_rate(rt5682_dai_bclk, 48000 * 64);
>> + ret = clk_prepare_enable(rt5682_dai_bclk);
>> + if (ret < 0) {
>> + dev_err(rtd->dev, "can't enable master clock %d\n", ret);
>> + return ret;
>> + }
>> + return ret;
>> +}
>
> Out of curiosity, is there a reason why you use clk_prepare_enable() for
> the bclk but not for the wclk?These changes were shared by codec vendor as an initial patch.
We should use clk_prepare_enable() for wclk not for bclk.
We will update and share the new patch.
On 3/16/21 8:37 AM, Mukunda,Vijendar wrote:
>
>
> On 15/03/21 9:30 pm, Pierre-Louis Bossart wrote:
>>
>>> +static int rt5682_clk_enable(struct snd_pcm_substream *substream)
>>> +{
>>> + int ret;
>>> + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
>>> +
>>> + /*
>>> + * Set wclk to 48000 because the rate constraint of this driver is
>>> + * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is
>>> + * minimum of 64x the LRCLK sample rate." RT5682 is the only clk
>>> + * source so for all codecs we have to limit bclk to 64X lrclk.
>>> + */
>>> + clk_set_rate(rt5682_dai_wclk, 48000);
>>> + clk_set_rate(rt5682_dai_bclk, 48000 * 64);
>>> + ret = clk_prepare_enable(rt5682_dai_bclk);
>>> + if (ret < 0) {
>>> + dev_err(rtd->dev, "can't enable master clock %d\n", ret);
>>> + return ret;
>>> + }
>>> + return ret;
>>> +}
>>
>> Out of curiosity, is there a reason why you use clk_prepare_enable()
>> for the bclk but not for the wclk?These changes were shared by codec
>> vendor as an initial patch.
> We should use clk_prepare_enable() for wclk not for bclk.
> We will update and share the new patch.
Well the question remains: if you have two clocks and only enable one,
why do you need to get two clocks.
Also this patch was modeled after the da7219 case, where the same open
applies.
> On 3/16/21 8:37 AM, Mukunda,Vijendar wrote:
> >
> >
> > On 15/03/21 9:30 pm, Pierre-Louis Bossart wrote:
> >>
> >>> +static int rt5682_clk_enable(struct snd_pcm_substream *substream) {
> >>> + int ret;
> >>> + struct snd_soc_pcm_runtime *rtd =
> >>> +asoc_substream_to_rtd(substream);
> >>> +
> >>> + /*
> >>> + * Set wclk to 48000 because the rate constraint of this driver
> >>> +is
> >>> + * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate
> >>> +that is
> >>> + * minimum of 64x the LRCLK sample rate." RT5682 is the only
> >>> +clk
> >>> + * source so for all codecs we have to limit bclk to 64X lrclk.
> >>> + */
> >>> + clk_set_rate(rt5682_dai_wclk, 48000);
> >>> + clk_set_rate(rt5682_dai_bclk, 48000 * 64);
> >>> + ret = clk_prepare_enable(rt5682_dai_bclk);
> >>> + if (ret < 0) {
> >>> + dev_err(rtd->dev, "can't enable master clock %d\n", ret);
> >>> + return ret;
> >>> + }
> >>> + return ret;
> >>> +}
> >>
> >> Out of curiosity, is there a reason why you use clk_prepare_enable()
> >> for the bclk but not for the wclk?These changes were shared by codec
> >> vendor as an initial patch.
> > We should use clk_prepare_enable() for wclk not for bclk.
> > We will update and share the new patch.
>
> Well the question remains: if you have two clocks and only enable one, why do
> you need to get two clocks.
>
> Also this patch was modeled after the da7219 case, where the same open
> applies.
The RT5682 could set the wclk and bclk separately.
The bclk could set the different ratios (32/64/128/256).
However, only the wclk of DAI clock has the .prepare callback function to enable the related power.
The next patch should update the clk_prepare_enable() for wclk.
> ------Please consider the environment before printing this e-mail.