[edk2-devel] [PATCH 0/2] MdeModulePkg/SdMmcPciHcDxe: Send the EdkiiSdMmcSwitchClockFreq notification before sending CMD13

[Marcin Wojtas]

Hi,

wt., 24 gru 2019 o 03:52 Wu, Hao A <hao.a.wu at intel.com> napisał(a):
>
> > -----Original Message-----
> > From: Albecki, Mateusz
> > Sent: Saturday, December 21, 2019 1:13 AM
> > To: devel at edk2.groups.io
> > Cc: Albecki, Mateusz; Wu, Hao A; Marcin Wojtas; Gao, Zhichao; Gao, Liming
> > Subject: [PATCH 0/2] MdeModulePkg/SdMmcPciHcDxe: Send the
> > EdkiiSdMmcSwitchClockFreq notification before sending CMD13
> >
> > The first patch refactors the SdMmcClockSupply function with a goal
> > of sending the EdkiiSdMmcSwitchClockFreq notification before we send the
> > CMD13 to check the switch status in eMMC init flow. This is required to
> > avoid sending the CMD13 on link that still has not been fixed by platform.
> >
> > To avoid changing the driver behavior we avoid sending notifications
> > when the clock is setup for the first time or when we setup the clock
> > after the voltage switch procedure(adressed in second patch).
> >
> > The second patch in the series optimizes the SD card detection routine
> > to stop it from going through the process of internal clock setup
> > after switching the voltage. According to SD HC specification there
> > is no need to setup internal clock all over again.
> >
> > Tests performed:
> > - Booted eMMC in HS400 mode on platform which required post clock freq
> > fixes
> >
> > I wasn't able to test SD card yet due to the lack of setup with working SD.
>
>
> I performed a quick verification on the eMMC device and SD card on my side.
> They work properly after the series.
>
> So for the series,
> Tested-by: Hao A Wu <hao.a.wu at intel.com>
>

I verified eMMC HS200 / HS at 50MHz and SD cards on 2 Armada platforms, so:
Tested-by: Marcin Wojtas <mw at semihalf.com>

Best regards,
Marcin

>
> >
> > The patch series is available on github here:
> > https://github.com/malbecki/edk2/tree/sdmmc_post_freq_notify
>
>
> Add Ard to the loop to see if there is additional comment.
>
> Best Regards,
> Hao Wu
>
>
> >
> > Cc: Hao A Wu <hao.a.wu at intel.com>
> > Cc: Marcin Wojtas <mw at semihalf.com>
> > Cc: Zhichao Gao <zhichao.gao at intel.com>
> > Cc: Liming Gao <liming.gao at intel.com>
> >
> > Mateusz Albecki (2):
> >   SdMmcPciHcDxe: Send EdkiiSdMmcSwitchClockFreq after SD clock start
> >   MdeModulePkg/SdMmcPciHcDxe: Add function to start SD clock
> >
> >  MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/EmmcDevice.c    |  20 +--
> >  MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdDevice.c      |  25 +---
> >  MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h |  24 ++++
> >  MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c   | 136
> > +++++++++++----------
> >  MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.h   |  45 ++-----
> >  5 files changed, 112 insertions(+), 138 deletions(-)
> >
> > --
> > 2.14.1.windows.1
>

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