On Sat, 16 Mar 2024 at 00:44, Romain Naour <romain.naour@xxxxxxxx> wrote:
>
> From: Romain Naour <romain.naour@xxxxxxx>
>
> "PM runtime functions" has been added in sdhci-omap driver in 5.16
> f433e8aac6b9 ("mmc: sdhci-omap: Implement PM runtime functions") along
> with "card power off and enable aggressive PM" 3edf588e7fe0
> ("mmc: sdhci-omap: Allow SDIO card power off and enable aggressive PM").
>
> Since then, the sdhci-omap driver doesn't work using mmc-hs200 mode
> due to the tuning values being lost during a pm transition.
> See the report on the linux-omap mailing list [1].
>
> As for the sdhci_am654 driver, request a new tuning sequence before
> suspend (sdhci_omap_runtime_suspend()), othwerwise the device will
> thigger cache flush errors:
>
> mmc1: cache flush error -110 (ETIMEDOUT)
> mmc1: error -110 doing aggressive suspend
>
> followed by I/O errors produced by fdisk -l /dev/mmcblk1boot1:
>
> I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1
> prio class 2
> I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x80700 phys_seg 1
> prio class 2
> I/O error, dev mmcblk1boot1, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1
> prio class 2
> Buffer I/O error on dev mmcblk1boot1, logical block 8048, async page read
> I/O error, dev mmcblk1boot0, sector 64384 op 0x0:(READ) flags 0x0 phys_seg 1
> prio class 2
> Buffer I/O error on dev mmcblk1boot0, logical block 8048, async page read
>
> Don't re-tune if auto retuning is supported in HW (when SDHCI_TUNING_MODE_3
> is available).
>
> [1] https://lore.kernel.org/all/2e5f1997-564c-44e4-b357-6343e0dae7ab@xxxxxxxx
>
> Fixes: f433e8aac6b9 ("mmc: sdhci-omap: Implement PM runtime functions")
> Signed-off-by: Romain Naour <romain.naour@xxxxxxx>
Applied for fixes and by fixing the comments Adrian pointed out in his
reply, thanks!
Note that, I have also tagged this for stable kernels.
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-omap.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
> index e78faef67d7a..94076b095571 100644
> --- a/drivers/mmc/host/sdhci-omap.c
> +++ b/drivers/mmc/host/sdhci-omap.c
> @@ -1439,6 +1439,9 @@ static int __maybe_unused sdhci_omap_runtime_suspend(struct device *dev)
> struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
>
> + if (host->tuning_mode != SDHCI_TUNING_MODE_3)
> + mmc_retune_needed(host->mmc);
> +
> if (omap_host->con != -EINVAL)
> sdhci_runtime_suspend_host(host);
>
> --
> 2.43.2
>
