[edk2-devel] [PATCH 0/3] MdeModulePkg/SdMmcPciHcDxe: Retry the commands that failed due to CRC error

[Albecki, Mateusz]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1140

Some of the boards report that just after we change the clock frequency to 200MHz link is
unable to stabilize fast enough and when driver sends the CMD13 it will often fail
randomly with CRC error. To protect against this kind of random failures this patch
series will make the driver retry the commands that failed due to random CRC errors.

Since async code has not yet been tested it has been put into separate patch. That patch
is not needed to solve most pressing CMD13 issues.

Tets performed:
-Boot eMMC in HS400
-Boot eMMC in HS400 with simulated CRC error on every first CMD13

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>

Signed-off-by: Mateusz Albecki <mateusz.albecki at intel.com>

Mateusz Albecki (3):
  MdeModulePkg/SdMmcPciHcDxe: Refactor command error detection
  MdeModulePkg/SdMmcPciHcDxe: Add retries for sync commands
  MdeModulePkg/SdMmcPciHcDxe: Add retries for async commands

 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c |  89 +++++---
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h |   5 +-
 MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHci.c   | 235 ++++++++++++++-------
 3 files changed, 221 insertions(+), 108 deletions(-)

-- 
2.14.1.windows.1

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