Re: [PATCH] scsi: ufs: Allow RTT negotiation

[Bean Huo <huobean@xxxxxxxxx>]

Avri,

On 02.05.24 3:19 PM, Avri Altman wrote:
> +	/* RTT override makes sense only for UFS-4.0 and above */
> +	if (dev_info->wspecversion < 0x400)
> +		return;
> +
> +	rtt = min_t(int, desc_buf[DEVICE_DESC_PARAM_RTT_CAP], hba->nortt);
> +	/* rtt is 2 after manufacturing */
> +	if (rtt < 3)
> +		return;
> +
> +	if (ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_WRITE_ATTR,
> +				    QUERY_ATTR_IDN_MAX_NUM_OF_RTT, 0, 0, &rtt))
> +		dev_err(hba->dev, "failed writing bMaxNumOfRTT\n");
> +}

bMaxNumOfRTT is Persistent Property,  do we need to re-write every time 
power cycle?

Kind regards,

Bean