Hi,
> owner@xxxxxxxxxxxxxxx] On Behalf Of Jarkko Lavinen
> 2: Disable smartidle mode while suspending (workaround)
This was the work around we had in internal trees for a long time.
However Madhu C. recently updated this based on an internal investigation. It is required to reset the command pin to clear the system for sleep. This allows retention to work.
The non-idle work around when profiled showed it was taking a huge amount of time for the clock re-enable to work. This actually would noticeably reduce MMC throughput when doing aggressive clock cutting in the driver and increase power usage.
+ } else {
+ OMAP_HSMMC_WRITE(host->base, SYSCTL,
+ OMAP_HSMMC_READ(host->base, SYSCTL) | SRD);
+ while (OMAP_HSMMC_READ(host->base, SYSCTL) & SRD) ;
If you use a really long time out then perhaps it doesn't matter. But if you try and be aggressive it will hurt you.
Regards,
Richard W.
��.n��������+%������w��{.n�����{�������ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
