>>> >>> First of all protocol state: >>> ------------------------------ >>> 7.4.57 BKOPS_EN [163] >>> This field allows the _host_ to indicate to the device if it is >>> expected >>> to periodically manually start background operations by writing to the >>> BKOPS_START field. >>> >>> ...In order for the device to know if host is going to periodically >>> start >>> background operations, host shall set bit 0 of BKOPS_EN (EXT_CSD byte >>> [163]) to indicate that it is going to write to BKOPS_START >>> periodically. >>> The device may then delay some of its maintenance operations to when >>> host >>> writes to BKOPS_START. >>> ------------------------------ >>> >>> My card supports BKOPS (by reading Bit 0 of BKOPS_SUPPORT (EXT_CSD byte >>> [502]), but BKOPS_EN[163] is not set. So I suppose, original code to >>> set >>> BKOPS_EN[163] is needed, otherwise card will never delay its >>> maintenance >>> operations. >> >> >> Ok...i will add the code for setting BKOPS_EN bit in patch-v4. > I hope this features are provided from platform data. since it's not > mandatory for all devices This feature is mandatory for eMMC v4.5, but it may be enabled only when card supports BKOPS_SUPPORT[502] is set (and this one depend on device) Thanks, Kostya -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
