Hi Laurent,
Your issue seem more related to a mmc protocol problem. Likely caused
by a bad patch for eMMC 4.5 poweroff notify. The patch I refer to is:
"mmc: core: Fix PowerOff Notify suspend/resume"
You may try to revert this patch and see if the same problem occurs for you.
We are trying to fix the issue inserted by the above commit in a patch named:
"MMC-4.5 Power OFF Notify Rework", please have a look if you have the time.
Kind regards
Ulf Hansson
On 12 June 2012 22:56, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
> The MMC_SLEEP_AWAKE and SD_IO_SEND_OP_COND commands share the same
> opcode. SD_IO_SEND_OP_COND isn't supported by the SH MMCIF, but
> MMC_SLEEP_AWAKE is. Discriminate between the two commands using the
> command flags, and reject SD_IO_SEND_OP_COND only.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/mmc/host/sh_mmcif.c | 14 ++++----------
> 1 files changed, 4 insertions(+), 10 deletions(-)
>
> Not supporting the MMC_SLEEP_AWAKE command makes system suspend fail if an MMC
> or eMMC device supporting sleep/wake is connected. The issue has been first
> noticed on the Armadillo 800 EVA board.
>
> diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
> index 724b35e..e32da11 100644
> --- a/drivers/mmc/host/sh_mmcif.c
> +++ b/drivers/mmc/host/sh_mmcif.c
> @@ -892,21 +892,15 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
>
> switch (mrq->cmd->opcode) {
> /* MMCIF does not support SD/SDIO command */
> - case SD_IO_SEND_OP_COND:
> + case MMC_SLEEP_AWAKE: /* = SD_IO_SEND_OP_COND (5) */
> + case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
> + if ((mrq->cmd->flags & MMC_CMD_MASK) != MMC_CMD_BCR)
> + break;
> case MMC_APP_CMD:
> host->state = STATE_IDLE;
> mrq->cmd->error = -ETIMEDOUT;
> mmc_request_done(mmc, mrq);
> return;
> - case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
> - if (!mrq->data) {
> - /* send_if_cond cmd (not support) */
> - host->state = STATE_IDLE;
> - mrq->cmd->error = -ETIMEDOUT;
> - mmc_request_done(mmc, mrq);
> - return;
> - }
> - break;
> default:
> break;
> }
> --
> Regards,
>
> Laurent Pinchart
>
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