[PATCH] mmc: Poll CD in case cyclic framework is enabled

[Marek Vasut]

On 12/4/23 01:44, Simon Glass wrote:
> Hi Marek,
> 
> On Sun, 3 Dec 2023 at 14:01, Marek Vasut <marek.vasut at mailbox.org> wrote:
>>
>> On 12/3/23 18:44, Simon Glass wrote:
>>> Hi Marek,
>>>
>>> On Sat, 2 Dec 2023 at 16:41, Marek Vasut
>>> <marek.vasut+renesas at mailbox.org> wrote:
>>>>
>>>> In case the cyclic framework is enabled, poll the card detect of already
>>>> initialized cards and deinitialize them in case they are removed. Since
>>>> the card initialization is a longer process and card initialization is
>>>> done on first access to an uninitialized card anyway, avoid initializing
>>>> newly detected uninitialized cards in the cyclic callback.
>>>>
>>>> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
>>>> ---
>>>> Cc: Jaehoon Chung <jh80.chung at samsung.com>
>>>> Cc: Peng Fan <peng.fan at nxp.com>
>>>> ---
>>>>    drivers/mmc/mmc-uclass.c | 27 +++++++++++++++++++++++++++
>>>>    1 file changed, 27 insertions(+)
>>>
>>> This is really nice!
>>
>> I wonder whether we can use this cyclic stuff for USB , that's on my
>> roadmap to look at . We could auto-detect new devices in the background,
>> which would be tidy. And maybe do block transfers in the background ?
> 
> Just the detect would be amazing!!
> 
> One thing on my mind is that we could have a console buffer, so that
> output from background tasks can be collected and written just before
> displaying the U-Boot prompt. I am itching to implement that part of
> it :-)

And a 'dmesg' command to go along with it ?

Go for it.