Hi Johan,
On Thu, 12 Oct 2023 at 04:19, Johan Jonker jbx6244@gmail.com wrote:
On 10/2/23 03:16, Simon Glass wrote:
Hi Johan,
On Thu, 28 Sept 2023 at 12:51, Johan Jonker jbx6244@gmail.com wrote:
Prepare a rkmtd UCLASS in use for writing Rockchip boot blocks in combination with existing userspace tools and rockusb command.
Signed-off-by: Johan Jonker jbx6244@gmail.com Reviewed-by: Kever Yang kever.yang@rock-chips.com
disk/part.c | 4 ++++ drivers/block/blk-uclass.c | 1 + include/dm/uclass-id.h | 1 + 3 files changed, 6 insertions(+)
A new uclass should have a sandbox test and a header file or some other docs describing it.
Hi Simon, Mark,
Found by git bisect. This serie worked fine till this patch was applied:
blk: Add bounce buffer support to read/write operations https://source.denx.de/u-boot/u-boot/-/commit/75191f75bce45f3b9aff607c88f177...
On Rockchip boards CONFIG_BOUNCE_BUFFER is selected by CONFIG_MMC_DW. These DW controllers have there own DMA interface. However Rockchip boards CONFIG_DM_DMA is not enabled. A virtual disk driver doesn't work with that extra buffer.
This patch is there. What route should we take to get rid of it.
This rkmtd driver should depend on !BOUNCE_BUFFER perhaps? Or if the bounce buffer is needed by rockchip, then perhaps we need to be able to enable/disable it at runtime for different uclasses / devices?
Regards, Simon