[U-Boot] [PATCH 0/4] Fix operation on Odroid devices

[Tobias Jakobi <tjakobi@math.uni-bielefeld.de>]

Hello Jaehoon,


Jaehoon Chung wrote:
> Dear, Tobias.
> 
> On 09/21/2015 06:34 PM, Tobias Jakobi wrote:
>> Hello,
>>
>> Jaehoon Chung wrote:
>>> Hi,
>>>
>>> On 09/21/2015 08:18 AM, Tobias Jakobi wrote:
>>>> Hello,
>>>>
>>>> currently operation on Exynos4412-based Odroid devices is broken.
>>>>
>>>> The bootloader stops with this message:
>>>> Card did not respond to voltage select!
>>>> *** Warning - MMC init failed, using default environment
>>>
>>> Which board did you use? and Which cad is failed? SD or eMMC?
>> This is an Odroid-X2. I'm booting from SD with a Sandisk Extreme. I
>> don't have any eMMC here.
> 
> But if your patch is applied, other exynos4412 and exynos using s5p_sdhci don't work fine for SD-card.
> This case is the specific X2 board. I think schematic is wrong.
> (I have checked the Odrodd_X-base_Rev_06.pdf)
> 
> Commonly, SD-detect pin is supplied to always-on power.
> But odroid-x/u board used the same supplier with I/O line. It's wrong.
I wouldn't know, I don't even know how to properly read these schematics.



> This is H/W mis-designed problem, not code problem.
> Well, I will reproduce your problem with X2 board.
> And if reproduced your problem, I will find other solution, not this. how about?
Sure, as long as this fixes the issue. Let me know if I can test anything.



>> Actually it was some other person who encountered this issue with his
>> Odroid-X2 and booting from SD. After he made me aware of it, I also
>> updated my u-boot (I was then using a version from May 2015, which works
>> perfectly btw) and encountered the very same issue as him.
>>
> 
> Need to consider other SoC. You seems to consider only Odroid based-on exyno4412.
> Did you test other exynos4412 board?
I have only one ARM board here, which is the Odroid-X2. Nothing else.


With best wishes,
Tobias


> 
> Best Regards,
> Jaehoon Chung
> 
>>
>>
>>> Your [PATCH 4/4] is strange..so i want to get more information.
>> For me it restores proper operation of the bootloader to the board.
>>
>>
>> With best wishes,
>> Tobias
>>
>>
>>>
>>> If you can share more information, i can explain more exactly about your problem.
>>>
>>> Best Regards,
>>> Jaehoon Chung
>>>
>>>>
>>>> This series fixes error handling in the s5p sdhci driver
>>>> and the cause of the issue, which is an inverted card
>>>> detection check.
>>>>
>>>> Thanks goes to Marek Vasut and Sjoerd Simons who helped
>>>> me on IRC to get this triaged.
>>>>
>>>> With best wishes,
>>>> Tobias
>>>>
>>>> Tobias Jakobi (4):
>>>>   exynos: Properly initialize host_caps in s5p_sdhci_core_init()
>>>>   exynos: Fix passing of errors in exynos_mmc_init()
>>>>   exynos: be more verbose in process_nodes()
>>>>   exynos: fix and cleanup do_sdhci_init()
>>>>
>>>>  drivers/mmc/s5p_sdhci.c | 39 +++++++++++++++++++++++----------------
>>>>  1 file changed, 23 insertions(+), 16 deletions(-)
>>>>
>>>
>>
>>
>