linux-kernel - Re: [PATCH v6 8/8] remoteproc: qcom: Update QDSP6 out-of-reset timeout value

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Message-ID: <64d65ee2-1aa4-7e9f-db0c-b4d592574916@quicinc.com>
Date:   Mon, 19 Sep 2022 19:50:56 +0530
From:   Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
To:     Sibi Sankar <quic_sibis@...cinc.com>,
        <linux-remoteproc@...r.kernel.org>, <agross@...nel.org>,
        <bjorn.andersson@...aro.org>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <robh+dt@...nel.org>,
        <quic_plai@...cinc.com>, <bgoswami@...cinc.com>, <perex@...ex.cz>,
        <tiwai@...e.com>, <srinivas.kandagatla@...aro.org>,
        <quic_rohkumar@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <swboyd@...omium.org>,
        <judyhsiao@...omium.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v6 8/8] remoteproc: qcom: Update QDSP6 out-of-reset
 timeout value


On 9/14/2022 3:15 PM, Sibi Sankar wrote:
Thanks for Your time Sibi Sankar!!!
>
> On 9/8/22 6:53 PM, Srinivasa Rao Mandadapu wrote:
>> Update QDSP6 out-of-reset timeout value to 1 second, as sometimes
>> ADSP boot failing on SC7280 based platforms with existing value.
>> Also add few micro seconds sleep after enabling boot core
>> start register.
>
> Please do check if the timeout that you hit is due to lack of
> required clock/bus scaling. If so increasing the timeout would
> be just an interim hack and might stop working in the future.
Okay. Will check and update it as per new findings.
>
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
>> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
>> ---
>>   drivers/remoteproc/qcom_q6v5_adsp.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c 
>> b/drivers/remoteproc/qcom_q6v5_adsp.c
>> index e55d593..4414e23 100644
>> --- a/drivers/remoteproc/qcom_q6v5_adsp.c
>> +++ b/drivers/remoteproc/qcom_q6v5_adsp.c
>> @@ -34,7 +34,7 @@
>>   /* time out value */
>>   #define ACK_TIMEOUT            1000
>>   #define ACK_TIMEOUT_US            1000000
>> -#define BOOT_FSM_TIMEOUT        10000
>> +#define BOOT_FSM_TIMEOUT        1000000
>>   /* mask values */
>>   #define EVB_MASK            GENMASK(27, 4)
>>   /*QDSP6SS register offsets*/
>> @@ -422,13 +422,14 @@ static int adsp_start(struct rproc *rproc)
>>         /* De-assert QDSP6 stop core. QDSP6 will execute after out of 
>> reset */
>>       writel(LPASS_BOOT_CORE_START, adsp->qdsp6ss_base + 
>> CORE_START_REG);
>> +    usleep_range(100, 110);
>>         /* Trigger boot FSM to start QDSP6 */
>>       writel(LPASS_BOOT_CMD_START, adsp->qdsp6ss_base + BOOT_CMD_REG);
>>         /* Wait for core to come out of reset */
>>       ret = readl_poll_timeout(adsp->qdsp6ss_base + BOOT_STATUS_REG,
>> -            val, (val & BIT(0)) != 0, 10, BOOT_FSM_TIMEOUT);
>> +            val, (val & BIT(0)) != 0, 100, BOOT_FSM_TIMEOUT);
>>       if (ret) {
>>           dev_err(adsp->dev, "failed to bootup adsp\n");
>>           goto disable_adsp_clks;
>>