Re: [PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

Re: [PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

[Wolfram Sang]

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> anymore. However, I know have the issue highly reproducible with
> renesas_defconfig and renesas-drivers. Good!

Bummer, it is not that reproducible :(

Yesterday, I tried latest linus tree which includes Ulf's changes to
genpd and it worked, even with the NON_REMOVABLE workaround removed
again. Then I reverted Ulf's changes to double check it made a
difference, but the SCC still worked. So, I switched back to the
renesas-drivers tree which used to fail last week, and it sadly works,
too. Sigh...

I'll move over now to upport the manual calibration mechanism and will
keep an eye on if/when the SCC fails again...


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Re: [PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

[Geert Uytterhoeven]

Hi Wolfram,

On Mon, Dec 2, 2019 at 9:20 AM Wolfram Sang <wsa@the-dreams.de> wrote:
> > anymore. However, I know have the issue highly reproducible with
> > renesas_defconfig and renesas-drivers. Good!
>
> Bummer, it is not that reproducible :(
>
> Yesterday, I tried latest linus tree which includes Ulf's changes to
> genpd and it worked, even with the NON_REMOVABLE workaround removed
> again. Then I reverted Ulf's changes to double check it made a
> difference, but the SCC still worked. So, I switched back to the
> renesas-drivers tree which used to fail last week, and it sadly works,
> too. Sigh...

How do you reboot in between tests?
I usually use /sbin/reboot if the target booted fine, and the (remote
controlled)
reset button if the target locked up.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

[Wolfram Sang]

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> How do you reboot in between tests?
> I usually use /sbin/reboot if the target booted fine, and the (remote
> controlled)
> reset button if the target locked up.

I use mostly the reset button. As I recall, last week the issue happened
even after a cold boot... but I can retry using 'reboot'.


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[PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

[Wolfram Sang]

RPM handling has been improved twice since this comment, and also SCC
handling has been improved a lot. All the testing we did (Geert's and
Niklas' and Wolfram's board farms) with the workaround removed did not
lead to problems, so it is time to get rid of it to the best of our
knowledge.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/mmc/host/tmio_mmc_core.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 49c2d406c48e..2478a91e84b2 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1160,15 +1160,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
 				  mmc->caps & MMC_CAP_NEEDS_POLL ||
 				  !mmc_card_is_removable(mmc));
 
-	/*
-	 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
-	 * hotplug gets disabled. It seems RuntimePM related yet we need further
-	 * research. Since we are planning a PM overhaul anyway, let's enforce
-	 * for now the device being active by enabling native hotplug always.
-	 */
-	if (pdata->flags & TMIO_MMC_MIN_RCAR2)
-		_host->native_hotplug = true;
-
 	/*
 	 * While using internal tmio hardware logic for card detection, we need
 	 * to ensure it stays powered for it to work.
-- 
2.30.0

Re: [PATCH] mmc: tmio: remove workaround for NON_REMOVABLE

[Ulf Hansson]

On Thu, 18 Feb 2021 at 13:01, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
>
> RPM handling has been improved twice since this comment, and also SCC
> handling has been improved a lot. All the testing we did (Geert's and
> Niklas' and Wolfram's board farms) with the workaround removed did not
> lead to problems, so it is time to get rid of it to the best of our
> knowledge.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/tmio_mmc_core.c | 9 ---------
>  1 file changed, 9 deletions(-)
>
> diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
> index 49c2d406c48e..2478a91e84b2 100644
> --- a/drivers/mmc/host/tmio_mmc_core.c
> +++ b/drivers/mmc/host/tmio_mmc_core.c
> @@ -1160,15 +1160,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
>                                   mmc->caps & MMC_CAP_NEEDS_POLL ||
>                                   !mmc_card_is_removable(mmc));
>
> -       /*
> -        * On Gen2+, eMMC with NONREMOVABLE currently fails because native
> -        * hotplug gets disabled. It seems RuntimePM related yet we need further
> -        * research. Since we are planning a PM overhaul anyway, let's enforce
> -        * for now the device being active by enabling native hotplug always.
> -        */
> -       if (pdata->flags & TMIO_MMC_MIN_RCAR2)
> -               _host->native_hotplug = true;
> -
>         /*
>          * While using internal tmio hardware logic for card detection, we need
>          * to ensure it stays powered for it to work.
> --
> 2.30.0
>