[PATCH v3] remoteproc: imx_dsp_rproc: add module parameter to ignore ready flag from remote processor

[S.J. Wang]

> 
> There are cases when we want to test a simple "hello world"
> application on the DSP and we don't have IPC between the cores.
> Therefore, skip the wait for remote processor to start.
> 
> Added "ignore_dsp_ready" flag while inserting the module to ignore remote
> processor reply after start.
> By default, this is off - do not ignore reply from rproc.
> 
> Signed-off-by: Iuliana Prodan <iuliana.prodan at nxp.com>

Acked-by: Shengjiu Wang <shengjiu.wang at gmail.com>

Best regards
Wang Shengjiu
> 
> ---
> Changes since v2
> - s/ignoreready/ignore_dsp_ready
> 
> Changes since v1
> - change BIT(31) to BIT(1) for REMOTE_SKIP_WAIT
> 
> ---
>  drivers/remoteproc/imx_dsp_rproc.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/remoteproc/imx_dsp_rproc.c
> b/drivers/remoteproc/imx_dsp_rproc.c
> index 95da1cbefacf..22e2ef068c67 100644
> --- a/drivers/remoteproc/imx_dsp_rproc.c
> +++ b/drivers/remoteproc/imx_dsp_rproc.c
> @@ -26,9 +26,20 @@
>  #include "remoteproc_elf_helpers.h"
>  #include "remoteproc_internal.h"
> 
> +#define IMX_DSP_IGNORE_REMOTE_READY		0
> +
> +/*
> + * Module parameters
> + */
> +static unsigned int imx_dsp_rproc_ignore_ready =
> +IMX_DSP_IGNORE_REMOTE_READY;
> module_param_named(ignore_dsp_ready,
> +imx_dsp_rproc_ignore_ready, int, 0644);
> MODULE_PARM_DESC(ignore_dsp_ready,
> +		 "Ignore remote proc reply after start, default is 0 (off).");
> +
>  #define DSP_RPROC_CLK_MAX			5
> 
>  #define REMOTE_IS_READY				BIT(0)
> +#define REMOTE_SKIP_WAIT			BIT(1)
>  #define REMOTE_READY_WAIT_MAX_RETRIES		500
> 
>  /* att flags */
> @@ -285,6 +296,9 @@ static int imx_dsp_rproc_ready(struct rproc *rproc)
>  	if (!priv->rxdb_ch)
>  		return 0;
> 
> +	if (priv->flags & REMOTE_SKIP_WAIT)
> +		return 0;
> +
>  	for (i = 0; i < REMOTE_READY_WAIT_MAX_RETRIES; i++) {
>  		if (priv->flags & REMOTE_IS_READY)
>  			return 0;
> @@ -903,6 +917,9 @@ static int imx_dsp_rproc_probe(struct
> platform_device *pdev)
>  	priv->rproc = rproc;
>  	priv->dsp_dcfg = dsp_dcfg;
> 
> +	if (imx_dsp_rproc_ignore_ready)
> +		priv->flags |= REMOTE_SKIP_WAIT;
> +
>  	dev_set_drvdata(dev, rproc);
> 
>  	INIT_WORK(&priv->rproc_work, imx_dsp_rproc_vq_work);
> --
> 2.17.1