Many SDHCI implementations exist that are almost spec complicant, and could be driven by the generic SD/MMC host controller driver except for some minimal necessary init time tweaks.
Adding such tweaks to the generic driver is undesirable. On the other hand, forking the driver for every platform that has such a SDHCI controller is problematic when it comes to upstreaming and ongoing maintenance (which is arguably the point of upstreaming in the first place). So these patches propose a workaround that is minimally invasive on the EDK2 side, but gives platforms a lot of leeway when it comes to applying SDHCI quirks. Changes since v2: - use a singleton instance of the SD/MMC protocol rather than one per controller; this is needed to support 'reconnect -r', as pointed out by Ray - use EDKII prefixes for all types defined by the protocol - replace 'hook' with 'notify', and tweak some other identifiers - add missing function comment headers for factored out functions Changes since RFC/v1: - add EFI_SD_MMC_PASS_THRU_PROTOCOL* member to override methods - use UINT64* not VOID* to pass capability structure (which is always 64 bits in size) Ard Biesheuvel (2): MdeModulePkg: introduce SD/MMC override protocol MdeModulePkg/SdMmcPciHcDxe: allow HC capabilities to be overridden MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.c | 134 +++++++++++++++++++- MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.h | 1 + MdeModulePkg/Bus/Pci/SdMmcPciHcDxe/SdMmcPciHcDxe.inf | 2 + MdeModulePkg/Include/Protocol/SdMmcOverride.h | 103 +++++++++++++++ MdeModulePkg/MdeModulePkg.dec | 3 + 5 files changed, 239 insertions(+), 4 deletions(-) create mode 100644 MdeModulePkg/Include/Protocol/SdMmcOverride.h -- 2.11.0 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
