Re: [PATCH v2] Revert "mmc: fsl_esdhc_imx: use VENDORSPEC_FRC_SDCLK_ON to control card clock output"

Hi Fabio

On 2021/6/8 10:07, Fabio Estevam wrote:

Hi Haibo,

On Mon, Jun 7, 2021 at 10:57 PM Bough Chen haibo.chen@nxp.com wrote:

...

Hi Fabio,

Force clock on did help us fix some issue, like voltage switch for UHS card. According to your commit log, seems this patch affect the booting time, do you mean the API readx_poll_timeout() cost a lot time? Can you show us the detail info about booting time effected by this patch?

If I revert the patch SPL/U-Boot boot in one second.

With this patch, it takes around 20 seconds, which is unacceptable.

Do you have a chance to see where it consumes so much time?

Thanks, Peng.

Thanks