linux-kernel - Re: [PATCH 0/4] mmc: core: Preparations to support SD UHS-II cards

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Date:   Wed, 31 Mar 2021 11:57:18 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Ben Chuang <ben.chuang@...esyslogic.com.tw>,
        Renius Chen <reniuschengl@...il.com>
Cc:     AKASHI Takahiro <takahiro.akashi@...aro.org>,
        greg.tu@...esyslogic.com.tw,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Takao Orito <orito.takao@...ionext.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-mmc <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 0/4] mmc: core: Preparations to support SD UHS-II cards

Hi Ben, Renius,

On Thu, 25 Feb 2021 at 18:04, Ulf Hansson <ulf.hansson@...aro.org> wrote:
>
> A series [1] that has been collaborative worked upon by Takahiro Akashi
> (Linaro) and Ben Chuang (Genesys Logic) is targeting to add SD UHS-II support
> to the mmc subsystem.
>
> Throughout the reviews, we realized that the changes affecting the mmc core to
> support the UHS-II interface/protocol might not be entirely straightforward to
> implement. Especially, I expressed some concerns about the code that manages
> power on/off, initialization and power management of a SD UHS-II card.
>
> Therefore, I have posted this small series to try to help to put some of the
> foundation in the mmc core in place. Hopefully this can provide some guidance
> and an overall structure, of how I think the code could evolve.
>
> More details are available in the commit messages and through comments in the
> code, for each path.
>
> Kind regards
> Uffe

I just wanted to get an update from your side. Did $subject series
help to move things forward?

If there is anything else I can help with, then please ping me.

Kind regards
Uffe

>
> [1]
> https://lkml.org/lkml/2020/11/5/1472
>
>
> Ulf Hansson (4):
>   mmc: core: Cleanup printing of speed mode at card insertion
>   mmc: core: Prepare to support SD UHS-II cards
>   mmc: core: Announce successful insertion of an SD UHS-II card
>   mmc: core: Extend support for mmc regulators with a vqmmc2
>
>  drivers/mmc/core/Makefile    |   2 +-
>  drivers/mmc/core/bus.c       |  38 +++--
>  drivers/mmc/core/core.c      |  17 ++-
>  drivers/mmc/core/core.h      |   1 +
>  drivers/mmc/core/host.h      |   5 +
>  drivers/mmc/core/regulator.c |  34 +++++
>  drivers/mmc/core/sd_uhs2.c   | 289 +++++++++++++++++++++++++++++++++++
>  include/linux/mmc/card.h     |   6 +
>  include/linux/mmc/host.h     |  30 ++++
>  9 files changed, 404 insertions(+), 18 deletions(-)
>  create mode 100644 drivers/mmc/core/sd_uhs2.c
>
> --
> 2.25.1
>