linux-kernel - Re: [PATCH] remoteproc: imx_dsp_rproc: add module parameter to ignore ready flag from remote processor

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Date:   Tue, 17 Jan 2023 11:09:16 +0200
From:   Iuliana Prodan <iuliana.prodan@....com>
To:     "S.J. Wang" <shengjiu.wang@....com>,
        "Iuliana Prodan (OSS)" <iuliana.prodan@....nxp.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Daniel Baluta <daniel.baluta@....com>,
        SOF-Team <sof-team@...eams.nxp.com>,
        MPU AUDIOSW-AUDIOSW <Mpuaudiosw@....com>
Cc:     dl-linux-imx <linux-imx@....com>,
        "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH] remoteproc: imx_dsp_rproc: add module parameter to ignore
 ready flag from remote processor

On 1/17/2023 9:36 AM, S.J. Wang wrote:
>> 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 "ignoreready" 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@....com>
>> ---
>>   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..ec298f8b019f 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_ignoreready =
>> +IMX_DSP_IGNORE_REMOTE_READY; module_param_named(ignoreready,
>> +imx_dsp_rproc_ignoreready, int, 0644); MODULE_PARM_DESC(ignoreready,
>> +		 "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(31)
> Can we use a close bit with REMOTE_IS_READY,  like BIT(1)?

Sure, I'll send a v2.

Thanks,

Iulia