On Fri, May 14, 2021 at 05:53:18PM +0200, Ulrich Hecht wrote: > The TMIO core sets a very low latency limit (100 us), but when using R-Car > SDHI hosts with SD cards, I have observed typical latencies of around 20-30 > ms. This prevents runtime PM from working properly, and the devices remain > on continuously. > > This patch sets the default latency limit to 100 ms to avoid that. > > Signed-off-by: Ulrich Hecht <uli+renesas@xxxxxxxx> Ulrich is right that the tuning error is just a cosmetic problem revealed by this patch and not really a regression. We are working on fixing this cosmetic problem. However, this patch is good as is and we finally have RPM working for SDHI with it. I tested RPM and suspend/resume and all worked nicely: Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> Tested-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
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