Re: [PATCH v2] mmc: sdhci: Use Auto CMD Auto Select only when v4_mode is true

2020-10-15 Thread Ulf Hansson
On Thu, 15 Oct 2020 at 11:41, Jisheng Zhang wrote: > > sdhci-of-dwcmshc meets an eMMC read performance regression with below > command after commit 427b6514d095 ("mmc: sdhci: Add Auto CMD Auto > Select support"): > > dd if=/dev/mmcblk0 of=/dev/null bs=8192 count=10 > > Before the commit, the

Re: [PATCH v2] mmc: sdhci: Use Auto CMD Auto Select only when v4_mode is true

2020-10-15 Thread Adrian Hunter
On 15/10/20 12:41 pm, Jisheng Zhang wrote: > sdhci-of-dwcmshc meets an eMMC read performance regression with below > command after commit 427b6514d095 ("mmc: sdhci: Add Auto CMD Auto > Select support"): > > dd if=/dev/mmcblk0 of=/dev/null bs=8192 count=10 > > Before the commit, the above

[PATCH v2] mmc: sdhci: Use Auto CMD Auto Select only when v4_mode is true

2020-10-15 Thread Jisheng Zhang
sdhci-of-dwcmshc meets an eMMC read performance regression with below command after commit 427b6514d095 ("mmc: sdhci: Add Auto CMD Auto Select support"): dd if=/dev/mmcblk0 of=/dev/null bs=8192 count=10 Before the commit, the above command gives 120MB/s After the commit, the above command