Unverified Commit 424d6d1a authored by YC Hung's avatar YC Hung Committed by Mark Brown
Browse files

ASoC: SOF: mediatek: Add mt8195 dsp clock support 



Add adsp clock on/off support on mt8195 platform.

Signed-off-by: default avatarYC Hung <yc.hung@mediatek.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20211118100749.54628-8-daniel.baluta@oss.nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 24d75049

sound/soc/sof/mediatek/adsp_helper.h

+1 −1
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ struct adsp_priv { 
	struct mbox_controller *adsp_mbox;



	struct mtk_adsp_chip_info *adsp;



	struct clk **clk;

	u32 (*ap2adsp_addr)(u32 addr, void *data);

	u32 (*adsp2ap_addr)(u32 addr, void *data);

sound/soc/sof/mediatek/mt8195/Makefile

+1 −1
Original line number Diff line number Diff line 
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)

snd-sof-mt8195-objs := mt8195.o mt8195-loader.o

snd-sof-mt8195-objs := mt8195.o mt8195-clk.o mt8195-loader.o

obj-$(CONFIG_SND_SOC_SOF_MT8195) += snd-sof-mt8195.o

sound/soc/sof/mediatek/mt8195/mt8195-clk.c

0 → 100644
+158 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)

//

// Copyright(c) 2021 Mediatek Corporation. All rights reserved.

//

// Author: YC Hung <yc.hung@mediatek.com>

//

// Hardware interface for mt8195 DSP clock



#include <linux/clk.h>

#include <linux/pm_runtime.h>

#include <linux/io.h>

#include "mt8195.h"

#include "mt8195-clk.h"

#include "../adsp_helper.h"

#include "../../sof-audio.h"



static const char *adsp_clks[ADSP_CLK_MAX] = {

	[CLK_TOP_ADSP] = "adsp_sel",

	[CLK_TOP_CLK26M] = "clk26m_ck",

	[CLK_TOP_AUDIO_LOCAL_BUS] = "audio_local_bus",

	[CLK_TOP_MAINPLL_D7_D2] = "mainpll_d7_d2",

	[CLK_SCP_ADSP_AUDIODSP] = "scp_adsp_audiodsp",

	[CLK_TOP_AUDIO_H] = "audio_h",

};



int mt8195_adsp_init_clock(struct snd_sof_dev *sdev)

{

	struct device *dev = sdev->dev;

	struct adsp_priv *priv = sdev->pdata->hw_pdata;

	int i;



	priv->clk = devm_kcalloc(dev, ADSP_CLK_MAX, sizeof(*priv->clk), GFP_KERNEL);



	if (!priv->clk)

		return -ENOMEM;



	for (i = 0; i < ADSP_CLK_MAX; i++) {

		priv->clk[i] = devm_clk_get(dev, adsp_clks[i]);

		if (IS_ERR(priv->clk[i]))

			return PTR_ERR(priv->clk[i]);

	}



	return 0;

}



static int adsp_enable_all_clock(struct snd_sof_dev *sdev)

{

	struct device *dev = sdev->dev;

	struct adsp_priv *priv = sdev->pdata->hw_pdata;

	int ret;



	ret = clk_prepare_enable(priv->clk[CLK_TOP_MAINPLL_D7_D2]);

	if (ret) {

		dev_err(dev, "%s clk_prepare_enable(mainpll_d7_d2) fail %d\n",

			__func__, ret);

		return ret;

	}



	ret = clk_prepare_enable(priv->clk[CLK_TOP_ADSP]);

	if (ret) {

		dev_err(dev, "%s clk_prepare_enable(adsp_sel) fail %d\n",

			__func__, ret);

		goto disable_mainpll_d7_d2_clk;

	}



	ret = clk_prepare_enable(priv->clk[CLK_TOP_AUDIO_LOCAL_BUS]);

	if (ret) {

		dev_err(dev, "%s clk_prepare_enable(audio_local_bus) fail %d\n",

			__func__, ret);

		goto disable_dsp_sel_clk;

	}



	ret = clk_prepare_enable(priv->clk[CLK_SCP_ADSP_AUDIODSP]);

	if (ret) {

		dev_err(dev, "%s clk_prepare_enable(scp_adsp_audiodsp) fail %d\n",

			__func__, ret);

		goto disable_audio_local_bus_clk;

	}



	ret = clk_prepare_enable(priv->clk[CLK_TOP_AUDIO_H]);

	if (ret) {

		dev_err(dev, "%s clk_prepare_enable(audio_h) fail %d\n",

			__func__, ret);

		goto disable_scp_adsp_audiodsp_clk;

	}



	return 0;



disable_scp_adsp_audiodsp_clk:

	clk_disable_unprepare(priv->clk[CLK_SCP_ADSP_AUDIODSP]);

disable_audio_local_bus_clk:

	clk_disable_unprepare(priv->clk[CLK_TOP_AUDIO_LOCAL_BUS]);

disable_dsp_sel_clk:

	clk_disable_unprepare(priv->clk[CLK_TOP_ADSP]);

disable_mainpll_d7_d2_clk:

	clk_disable_unprepare(priv->clk[CLK_TOP_MAINPLL_D7_D2]);



	return ret;

}



static void adsp_disable_all_clock(struct snd_sof_dev *sdev)

{

	struct adsp_priv *priv = sdev->pdata->hw_pdata;



	clk_disable_unprepare(priv->clk[CLK_TOP_AUDIO_H]);

	clk_disable_unprepare(priv->clk[CLK_SCP_ADSP_AUDIODSP]);

	clk_disable_unprepare(priv->clk[CLK_TOP_AUDIO_LOCAL_BUS]);

	clk_disable_unprepare(priv->clk[CLK_TOP_ADSP]);

	clk_disable_unprepare(priv->clk[CLK_TOP_MAINPLL_D7_D2]);

}



static int adsp_default_clk_init(struct snd_sof_dev *sdev, bool enable)

{

	struct device *dev = sdev->dev;

	struct adsp_priv *priv = sdev->pdata->hw_pdata;

	int ret;



	dev_dbg(dev, "%s: %s\n", __func__, enable ? "on" : "off");



	if (enable) {

		ret = clk_set_parent(priv->clk[CLK_TOP_ADSP],

				     priv->clk[CLK_TOP_CLK26M]);

		if (ret) {

			dev_err(dev, "failed to set dsp_sel to clk26m: %d\n", ret);

			return ret;

		}



		ret = clk_set_parent(priv->clk[CLK_TOP_AUDIO_LOCAL_BUS],

				     priv->clk[CLK_TOP_MAINPLL_D7_D2]);

		if (ret) {

			dev_err(dev, "set audio_local_bus failed %d\n", ret);

			return ret;

		}



		ret = adsp_enable_all_clock(sdev);

		if (ret) {

			dev_err(dev, "failed to adsp_enable_clock: %d\n", ret);

			return ret;

		}

	} else {

		adsp_disable_all_clock(sdev);

	}



	return 0;

}



int adsp_clock_on(struct snd_sof_dev *sdev)

{

	/* Open ADSP clock */

	return adsp_default_clk_init(sdev, 1);

}



int adsp_clock_off(struct snd_sof_dev *sdev)

{

	/* Close ADSP clock */

	return adsp_default_clk_init(sdev, 0);

}

sound/soc/sof/mediatek/mt8195/mt8195-clk.h

0 → 100644
+28 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */



/*

 * Copyright (c) 2021 MediaTek Corporation. All rights reserved.

 *

 *  Header file for the mt8195 DSP clock  definition

 */



#ifndef __MT8195_CLK_H

#define __MT8195_CLK_H



struct snd_sof_dev;



/*DSP clock*/

enum adsp_clk_id {

	CLK_TOP_ADSP,

	CLK_TOP_CLK26M,

	CLK_TOP_AUDIO_LOCAL_BUS,

	CLK_TOP_MAINPLL_D7_D2,

	CLK_SCP_ADSP_AUDIODSP,

	CLK_TOP_AUDIO_H,

	ADSP_CLK_MAX

};



int mt8195_adsp_init_clock(struct snd_sof_dev *sdev);

int adsp_clock_on(struct snd_sof_dev *sdev);

int adsp_clock_off(struct snd_sof_dev *sdev);

#endif

sound/soc/sof/mediatek/mt8195/mt8195.c

+20 −2
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include "../adsp_helper.h"

#include "../mediatek-ops.h"

#include "mt8195.h"

#include "mt8195-clk.h"



static int platform_parse_resource(struct platform_device *pdev, void *data)

{
@@ -231,10 +232,22 @@ static int mt8195_dsp_probe(struct snd_sof_dev *sdev) 
	if (ret)

		return ret;



	ret = mt8195_adsp_init_clock(sdev);

	if (ret) {

		dev_err(sdev->dev, "mt8195_adsp_init_clock failed\n");

		return -EINVAL;

	}



	ret = adsp_clock_on(sdev);

	if (ret) {

		dev_err(sdev->dev, "adsp_clock_on fail!\n");

		return -EINVAL;

	}



	ret = adsp_sram_power_on(sdev->dev, true);

	if (ret) {

		dev_err(sdev->dev, "adsp_sram_power_on fail!\n");

		return ret;

		goto exit_clk_disable;

	}



	ret = adsp_memory_remap_init(&pdev->dev, priv->adsp);
@@ -282,6 +295,8 @@ static int mt8195_dsp_probe(struct snd_sof_dev *sdev) 


err_adsp_sram_power_off:

	adsp_sram_power_on(&pdev->dev, false);

exit_clk_disable:

	adsp_clock_off(sdev);



	return ret;

}
@@ -290,7 +305,10 @@ static int mt8195_dsp_remove(struct snd_sof_dev *sdev) 
{

	struct platform_device *pdev = container_of(sdev->dev, struct platform_device, dev);



	return adsp_sram_power_on(&pdev->dev, false);

	adsp_sram_power_on(&pdev->dev, false);

	adsp_clock_off(sdev);



	return 0;

}



/* on mt8195 there is 1 to 1 match between type and BAR idx */