From: Daniel Baluta daniel.baluta@nxp.com
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 --- sound/soc/sof/imx/imx8m.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/sound/soc/sof/imx/imx8m.c b/sound/soc/sof/imx/imx8m.c index b050d4cf9cd5..9972ca8e6ec6 100644 --- a/sound/soc/sof/imx/imx8m.c +++ b/sound/soc/sof/imx/imx8m.c @@ -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);