Hi Randall, > I am working on Android phone. > The idea is to enable write hint for Turbo write UFS feature. Turbo > write feature in UFS 3.x is under discussion in JEDEC JC-64. This > patch is the under-lying framework for supporting this feature. OK, but we can't blindly go setting GROUP NUMBER to a non-zero value. That'll break a massive amount of devices which will fail READ/WRITE commands with INVALID FIELD IN CDB. So aside from requiring the device to report GROUP_SUP=1, we'll need some sort of indication that this device supports the UFS Turbo Write feature. If you are engaged with JEDEC on this, please tell them we'll need a VPD page, a mode page, or something similar to use as trigger to entertain enabling this feature. -- Martin K. Petersen Oracle Linux Engineering
