Re: [PATCH edk2-platforms] Silicon/SynQuacer/PlatformDxe: disable eMMC DDR50 support

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 8 February 2018 at 10:21, Leif Lindholm <leif.lindholm@linaro.org> wrote:
> On Thu, Feb 08, 2018 at 10:18:12AM +0000, Ard Biesheuvel wrote:
>> We already disable SDR104 support on the SynQuacer eMMC controller to
>> work around the need for a special tuning quirk that is difficult to
>> implement without modifying the generic driver, even in the presence
>> of a SD/MMC override protocol designed to carry such quirks.
>>
>> Unfortunately, as it turns out, DDR50 does not work either with the
>> particular 8 GB Kingston part that has been fitted on the rev0.2/0.3
>> 96board samples. Since the mode UEFI drives the eMMC in is independent
>> from what the OS chooses, and the fact that you would not use eMMC in
>> the first place if performance was a major concern, let's just disable
>> DDR50 as well, and fall back to SDR50 mode.
>>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>
> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
>

Thanks, pushed.