Hi Wolfram-san, > From: Wolfram Sang, Sent: Monday, August 2, 2021 9:53 PM > > > Would you know how to measure the latencies? > > I didn't measure the latencies itself. I just checked 'clk_summary' in > debugfs and verified that finally clocks are disabled by RPM. Because > only with this patch, clk_enable-cnt goes to zero when SD card is > removed or eMMC has no activity. Thank you for your comment! Now I understood :) So, I'll test this patch with my test environment tomorrow. Best regards, Yoshihiro Shimoda