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ASoC: SOF: imx8m: Implement DSP start

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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: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Pierre-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: Mark Brown <broonie@kernel.org>
This commit is contained in:
Daniel Baluta 2021-11-19 11:43:18 +02:00 committed by Mark Brown
parent a73b493d8e
commit 9ba23717b2
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GPG Key ID: 24D68B725D5487D0
1 changed files with 24 additions and 1 deletions
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25
sound/soc/sof/imx/imx8m.c
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@ -6,10 +6,13 @@
// //
// Hardware interface for audio DSP on i.MX8M // Hardware interface for audio DSP on i.MX8M
#include <linux/bits.h>
#include <linux/firmware.h> #include <linux/firmware.h>
#include <linux/mfd/syscon.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <linux/of_irq.h> #include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/module.h> #include <linux/module.h>
#include <sound/sof.h> #include <sound/sof.h>
@ -29,6 +32,14 @@ static struct clk_bulk_data imx8m_dsp_clks[] = {
{ .id = "core" }, { .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 imx8m_priv {
struct device *dev; struct device *dev;
struct snd_sof_dev *sdev; struct snd_sof_dev *sdev;
@ -38,6 +49,8 @@ struct imx8m_priv {
struct platform_device *ipc_dev; struct platform_device *ipc_dev;
struct imx_clocks *clks; struct imx_clocks *clks;
struct regmap *regmap;
}; };
static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev) 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) 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; return 0;
} }
@ -187,6 +203,13 @@ static int imx8m_probe(struct snd_sof_dev *sdev)
/* set default mailbox offset for FW ready message */ /* set default mailbox offset for FW ready message */
sdev->dsp_box.offset = MBOX_OFFSET; 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 */ /* init clocks info */
priv->clks->dsp_clks = imx8m_dsp_clks; priv->clks->dsp_clks = imx8m_dsp_clks;
priv->clks->num_dsp_clks = ARRAY_SIZE(imx8m_dsp_clks); priv->clks->num_dsp_clks = ARRAY_SIZE(imx8m_dsp_clks);