linux-kernel - Re: [PATCH v2 00/16] mmc: meson-gx: driver fixups and upgrades

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Date:   Wed, 23 Aug 2017 15:10:25 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Jerome Brunet <jbrunet@...libre.com>
Cc:     Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 00/16] mmc: meson-gx: driver fixups and upgrades

On 22 August 2017 at 13:46, Jerome Brunet <jbrunet@...libre.com> wrote:
> On Tue, 2017-08-22 at 13:15 +0200, Ulf Hansson wrote:
>> On 21 August 2017 at 18:02, Jerome Brunet <jbrunet@...libre.com> wrote:
>> > The patchset features several bugfixes, rework and upgrade for the
>> > meson-gx MMC driver.
>> >
>> > The main goal is to improve readability and enable new high speed
>> > modes, such as eMMC DDR52 and sdcard UHS modes up to SDR50 (100Mhz)
>> >
>> > SDR104 is not working with a few cards on the p200 and the
>> > libretech-cc. I suspect that 200Mhz might be a bit too fast for the PCB
>> > of these boards, adding noise to the signal and eventually breaking
>> > the communication with some cards. The same cards are working well on a
>> > laptop or the nanopi-k2 at 200Mhz.
>> >
>> > This series has been tested on gxbb-p200, gxbb-nanopi-k2 and
>> > gxl-s905x-libretech-cc
>> >
>> > Changes since v1 [0]:
>> > * Reorder patches to have fixes first, then rework and finally
>> >   enhancements.
>> > * Use CCF to manage clock phases
>> >
>> > [0]: https://lkml.kernel.org/r/20170804174353.16486-1-jbrunet@baylibre.com
>> >
>> > Jerome Brunet (16):
>> >   mmc: meson-gx: fix mux mask definition
>> >   mmc: meson-gx: remove CLK_DIVIDER_ALLOW_ZERO clock flag
>> >   mmc: meson-gx: clean up some constants
>> >   mmc: meson-gx: use _irqsave variant of spinlock
>> >   mmc: meson-gx: cfg init overwrite values
>> >   mmc: meson-gx: rework set_ios function
>> >   mmc: meson-gx: rework clk_set function
>> >   mmc: meson-gx: rework clock init function
>> >   mmc: meson-gx: fix dual data rate mode frequencies
>> >   mmc: meson-gx: work around clk-stop issue
>> >   mmc: meson-gx: simplify interrupt handler
>> >   mmc: meson-gx: implement card_busy callback
>> >   mmc: meson-gx: use CCF to handle the clock phases
>> >   mmc: meson-gx: implement voltage switch callback
>> >   mmc: meson-gx: change default tx phase
>> >   mmc: meson-gx: rework tuning function
>> >
>> >  drivers/mmc/host/meson-gx-mmc.c | 718 +++++++++++++++++++++++++++--------
>> > -----
>> >  1 file changed, 497 insertions(+), 221 deletions(-)
>> >
>> > --
>> > 2.9.5
>> >
>>
>> So far, I decided to pick patch 1 -> 3.
>
> Thx Ulf.
> Do you want me to respin w/o patch 1 -> 4 or shall I wait for further review on
> the other changes ?

I think you can wait a bit, hopefully some of the earlier authors and
Kevin can give some input as well.

Kind regards
Uffe