linux-kernel - Re: [RFC v4 4/6] mmc: core: add new calls to mmc_fixup_device(sdio_card_init

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Message-Id: <532B045A-951B-4104-9D77-4AA620958F52@goldelico.com>
Date:   Mon, 8 Nov 2021 17:07:28 +0100
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Jérôme Pouiller <Jerome.Pouiller@...abs.com>,
        Avri Altman <avri.altman@....com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tony Lindgren <tony@...mide.com>,
        Bean Huo <beanhuo@...ron.com>,
        Gražvydas Ignotas <notasas@...il.com>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        letux-kernel@...nphoenux.org, kernel@...a-handheld.com
Subject: Re: [RFC v4 4/6] mmc: core: add new calls to
 mmc_fixup_device(sdio_card_init_methods)



> Am 08.11.2021 um 16:08 schrieb Ulf Hansson <ulf.hansson@...aro.org>:
> 
> On Fri, 5 Nov 2021 at 10:06, H. Nikolaus Schaller <hns@...delico.com> wrote:
>> 
>> This allows to add quirks based on device tree instead of having
>> card specific code in the host ops.
>> 
>> We call it just after where host->ops->init_card() can be optionally
>> called.
>> 
>> Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
>> ---
>> drivers/mmc/core/mmc.c  | 1 +
>> drivers/mmc/core/sd.c   | 2 ++
>> drivers/mmc/core/sdio.c | 1 +
>> 3 files changed, 4 insertions(+)
>> 
>> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
>> index 29e58ffae3797..19cd138acaec9 100644
>> --- a/drivers/mmc/core/mmc.c
>> +++ b/drivers/mmc/core/mmc.c
>> @@ -1634,6 +1634,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>>         */
>>        if (host->ops->init_card)
>>                host->ops->init_card(host, card);
>> +       mmc_fixup_device(card, sdio_card_init_methods);
>> 
>>        /*
>>         * For native busses:  set card RCA and quit open drain mode.
>> diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
>> index 4646b7a03db6b..0d174fdf47164 100644
>> --- a/drivers/mmc/core/sd.c
>> +++ b/drivers/mmc/core/sd.c
>> @@ -23,6 +23,7 @@
>> #include "host.h"
>> #include "bus.h"
>> #include "mmc_ops.h"
>> +#include "quirks.h"
>> #include "sd.h"
>> #include "sd_ops.h"
>> 
>> @@ -1427,6 +1428,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
>>         */
>>        if (host->ops->init_card)
>>                host->ops->init_card(host, card);
>> +       mmc_fixup_device(card, sdio_card_init_methods);
>> 
>>        /*
>>         * For native busses:  get card RCA and quit open drain mode.
>> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
>> index 68edf7a615be5..cf8ee66990508 100644
>> --- a/drivers/mmc/core/sdio.c
>> +++ b/drivers/mmc/core/sdio.c
>> @@ -707,6 +707,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
>>         */
>>        if (host->ops->init_card)
>>                host->ops->init_card(host, card);
>> +       mmc_fixup_device(card, sdio_card_init_methods);
>> 
>>        /*
>>         * If the host and card support UHS-I mode request the card
>> --
>> 2.33.0
>> 
> 
> As the quirk is for SDIO cards, we don't need to call
> mmc_fixup_device(card, sdio_card_init_methods) - other than from
> mmc_sdio_init_card().

Ok. Well, the old code did have some logic for some SD_COMBO.
But I have no idea if that is needed.

> Additionally, for sd/mmc we should not be using
> 'sdio_card_init_methods'.

Ok ,I see.

> 
> That said, it looks also reasonable to me, to squash $subject patch with patch3.

Ok.

BR and thanks,
Nikolaus