A few months ago, hans de Goede and I where talking about the behavior of HPI on eMMC modules. We came to the conclusion that more often then not, the mmc chipset might be the problem and not the eMMC module itself. To remedy this the broken-hpi parameter is now also checked on the chipset level.
On the sunxi platform, all the eMMC users with emmc modules that support HPI need the broken-hpi flag, indicating that the sunxi mmc controller is likely not properly supporting HPI. We disable this on the chipset level for these chipsets. As for the broken-hpi flag in the devicetree's, those should in theory be removed from the boards in question in a separate patch when in agreement, as technically, the eMMC module supports HPI just fine and thus the we are lying about what really is broken. This was tested on an OLinuXino Lime2 with 4GB industrial grade Micron eMMC flash. Olliver Schinagl (2): mmc: core: Improve marking broken HPI through devicetree mmc: sunxi: Mark the HPI of the mmc controller broken by default drivers/mmc/core/host.c | 2 ++ drivers/mmc/core/mmc.c | 2 +- drivers/mmc/host/sunxi-mmc.c | 4 ++-- include/linux/mmc/host.h | 1 + 4 files changed, 6 insertions(+), 3 deletions(-) -- 2.8.0.rc3
