Unverified Commit 9ba23717 authored by Daniel Baluta's avatar Daniel Baluta Committed by Mark Brown
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ASoC: SOF: imx8m: Implement DSP start 



On i.MX8M DSP is controlled via a set of registers
from Audio MIX. This patches gets a reference (via regmap)
to Audio Mix registers and implements DSP start.

Signed-off-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20211119094319.81674-5-daniel.baluta@oss.nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a73b493d

sound/soc/sof/imx/imx8m.c

+24 −1
Original line number Diff line number Diff line
@@ -6,10 +6,13 @@ 
//

// Hardware interface for audio DSP on i.MX8M



#include <linux/bits.h>

#include <linux/firmware.h>

#include <linux/mfd/syscon.h>

#include <linux/of_platform.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/regmap.h>



#include <linux/module.h>

#include <sound/sof.h>
@@ -29,6 +32,14 @@ static struct clk_bulk_data imx8m_dsp_clks[] = { 
	{ .id = "core" },

};



/* DSP audio mix registers */

#define AudioDSP_REG0	0x100

#define AudioDSP_REG1	0x104

#define AudioDSP_REG2	0x108

#define AudioDSP_REG3	0x10c



#define AudioDSP_REG2_RUNSTALL	BIT(5)



struct imx8m_priv {

	struct device *dev;

	struct snd_sof_dev *sdev;
@@ -38,6 +49,8 @@ struct imx8m_priv { 
	struct platform_device *ipc_dev;



	struct imx_clocks *clks;



	struct regmap *regmap;

};



static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev)
@@ -96,7 +109,10 @@ static int imx8m_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg) 
 */

static int imx8m_run(struct snd_sof_dev *sdev)

{

	/* TODO: start DSP using Audio MIX bits */

	struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;



	regmap_update_bits(priv->regmap, AudioDSP_REG2, AudioDSP_REG2_RUNSTALL, 0);



	return 0;

}
@@ -187,6 +203,13 @@ static int imx8m_probe(struct snd_sof_dev *sdev) 
	/* set default mailbox offset for FW ready message */

	sdev->dsp_box.offset = MBOX_OFFSET;



	priv->regmap = syscon_regmap_lookup_by_compatible("fsl,dsp-ctrl");

	if (IS_ERR(priv->regmap)) {

		dev_err(sdev->dev, "cannot find dsp-ctrl registers");

		ret = PTR_ERR(priv->regmap);

		goto exit_pdev_unregister;

	}



	/* init clocks info */

	priv->clks->dsp_clks = imx8m_dsp_clks;

	priv->clks->num_dsp_clks = ARRAY_SIZE(imx8m_dsp_clks);