On 06/07/18 15:30, Asutosh Das wrote:
> From: Sujit Reddy Thumma <sthumma@xxxxxxxxxxxxxx>
>
> Override auto suspend tunables for UFS device LUNs during
> initialization so as to efficiently manage background operations
> and the power consumption.
>
> Signed-off-by: Sujit Reddy Thumma <sthumma@xxxxxxxxxxxxxx>
> Signed-off-by: Gilad Broner <gbroner@xxxxxxxxxxxxxx>
> Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/scsi/ufs/ufshcd.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 77e2b3e..b03f3ea 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -89,6 +89,9 @@
> /* Interrupt aggregation default timeout, unit: 40us */
> #define INT_AGGR_DEF_TO 0x02
>
> +/* default value of auto suspend is 3 seconds */
> +#define UFSHCD_AUTO_SUSPEND_DELAY_MS 3000 /* millisecs */
> +
> #define ufshcd_toggle_vreg(_dev, _vreg, _on) \
> ({ \
> int _ret; \
> @@ -4528,6 +4531,9 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
> blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1);
> blk_queue_max_segment_size(q, PRDT_DATA_BYTE_COUNT_MAX);
>
> + sdev->autosuspend_delay = UFSHCD_AUTO_SUSPEND_DELAY_MS;
> + sdev->use_rpm_auto = 1;
> +
> return 0;
> }
>
>
