ASoC: SOF: mediatek: Add mt8195 dsp clock support

Add adsp clock on/off support on mt8195 platform.

Signed-off-by: YC Hung <yc.hung@mediatek.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20211118100749.54628-8-daniel.baluta@oss.nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sof/mediatek/adsp_helper.h b/sound/soc/sof/mediatek/adsp_helper.h
index 346953dd22db9016f1044ef7d3c1495e707af0d3..6734e2c0c6b1cfeca18d96c093c4082881ba578e 100644 (file)
--- a/sound/soc/sof/mediatek/adsp_helper.h
+++ b/sound/soc/sof/mediatek/adsp_helper.h
@@ -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);
 

diff --git a/sound/soc/sof/mediatek/mt8195/Makefile b/sound/soc/sof/mediatek/mt8195/Makefile
index 66cdc0e7bf3cbe8651cba48e3dfd3219857b1462..afc4f21fccc504d53e4a853e2f64af9e082ade46 100644 (file)
--- a/sound/soc/sof/mediatek/mt8195/Makefile
+++ b/sound/soc/sof/mediatek/mt8195/Makefile
@@ -1,3 +1,3 @@
 # 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

diff --git a/sound/soc/sof/mediatek/mt8195/mt8195-clk.c b/sound/soc/sof/mediatek/mt8195/mt8195-clk.c
new file mode 100644 (file)
index 0000000..6bcb4b9
--- /dev/null
+++ b/sound/soc/sof/mediatek/mt8195/mt8195-clk.c
@@ -0,0 +1,158 @@
+// 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);
+}
+

diff --git a/sound/soc/sof/mediatek/mt8195/mt8195-clk.h b/sound/soc/sof/mediatek/mt8195/mt8195-clk.h
new file mode 100644 (file)
index 0000000..9cc0573
--- /dev/null
+++ b/sound/soc/sof/mediatek/mt8195/mt8195-clk.h
@@ -0,0 +1,28 @@
+/* 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

diff --git a/sound/soc/sof/mediatek/mt8195/mt8195.c b/sound/soc/sof/mediatek/mt8195/mt8195.c
index 99075598a35ae3f363651be267a6799d893b60b8..5bfae9379ac8d7fd231090cb95b258311721bc65 100644 (file)
--- a/sound/soc/sof/mediatek/mt8195/mt8195.c
+++ b/sound/soc/sof/mediatek/mt8195/mt8195.c
@@ -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 */