Messages in this thread | | | From | "DooHyun Hwang" <> | Subject | RE: [PATCH] mmc: core: add a power cycle when CMD11 fails | Date | Thu, 25 Feb 2021 16:43:09 +0900 |
| |
Dear Maintainers and commiters.
Please review this patch for updating.
Thanks and regards. DooHyun Hwang.
On 17/02/10 4:59 am, DooHyun Hwang wrote: >Subject: [PATCH] mmc: core: add a power cycle when CMD11 fails > >A power cycle is required if CMD11 fails. >CMD11 failure should be handled as no response. > >If there is a timeout error that means no response to the CMD11, do not >send the CMD11 again and the power cycle is required. >Any other errors for CMD11 are the same because CMD11 failed. > >On some bad SD Card, CMD11 may fail but the card may have already invoked >the voltage switch sequence. >In this case, it is necessary to retry without voltage switching after >power cycle. > >Signed-off-by: DooHyun Hwang <dh0421.hwang@samsung.com>
| |