On Wed, Dec 16, 2020 at 07:29:32PM +0900, Yoshihiro Shimoda wrote:
> Add pre_req and post_req support to improve performance.
> 
> Inspired by a patch in the BSP by Masaharu Hayakawa.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

So, I tested this on H3 ES2.0 and M3-N with interesting results. H3
ES2.0 has a significant speedup:

with: 254MB/s, without 207MB/s

M3-N speedup is smaller but general throughput is much better:

with: 262MB/s, without 250MB/s

Same kernel, both systems idle otherwise. I don't think it has to do
with the number of CPU cores, but more that the SDHI revision is a tad
newer maybe?

Patch looks good, too:

Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>