[PATCH] configs: j722s_evm_a53_defconfig: Allow configurability of MMCSD speeds

[Tom Rini]

On Thu, Mar 12, 2026 at 02:46:27PM +0530, Moteen Shah wrote:
> Hey Tom and Udit,
> 
> On 10/03/26 04:45, Tom Rini wrote:
> > On Fri, Feb 20, 2026 at 03:17:37PM +0530, Moteen Shah wrote:
> > > On 20/02/26 14:05, Kumar, Udit wrote:
> > > > On 2/20/2026 12:55 PM, Moteen Shah wrote:
> > > > > Add config to allow UHS support, in turn allowing to select
> > > > > UHS speed modes for the SD card
> > > > > 
> > > > > Signed-off-by: Moteen Shah <m-shah at ti.com>
> > > > > ---
> > > > > Test logs:
> > > > > https://gist.github.com/Jamm02/e8b8b8c95cb62a7145d73f7ef50b2d8e
> > > > > 
> > > > >    configs/j722s_evm_a53_defconfig | 1 +
> > > > >    1 file changed, 1 insertion(+)
> > > > > 
> > > > > diff --git a/configs/j722s_evm_a53_defconfig
> > > > > b/configs/j722s_evm_a53_defconfig
> > > > > index e84670c75ed..24ee293c803 100644
> > > > > --- a/configs/j722s_evm_a53_defconfig
> > > > > +++ b/configs/j722s_evm_a53_defconfig
> > > > > @@ -107,6 +107,7 @@ CONFIG_MMC_SDHCI=y
> > > > >    CONFIG_MMC_SDHCI_ADMA=y
> > > > >    CONFIG_SPL_MMC_SDHCI_ADMA=y
> > > > >    CONFIG_MMC_SDHCI_AM654=y
> > > > > +CONFIG_MMC_UHS_SUPPORT=y
> > > > 
> > > > you may need at A72/SPL stage as well,
> > > Other J7 boards already have this config enabled in the a72 stage.
> > > > and do you think , R5/SPL will need this too ?
> > > Any of the K3 devices does not enables this in R5 SPL, though we do have
> > > HS400 enabled in the R5 stage.
> > > Adding the config should result in a little performance gain I think.
> > Is this a function of board design, or a SoC-level feature?
> 
> SOC level feature, thought it has dependency on the board to provide the
> right voltage to the card.
> 
> @udit, I did some profiling with UHS enabled at the R5 stage on J784s4-EVM
> but I see no performance gain there, likely due to the fact that the R5
> stage takes up very minimal percentage of the boot time. This patch can go
> in as it is.

I think we should imply this under ARCH_K3 then, so that boards which do
not meet the design requirements can turn it off, as I am assuming most
do.

-- 
Tom
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