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SD command queue compatibility expansion #7265

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SD command queue compatibility expansion #7265

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ec1ef20
mmc: sd: add fall-back extension register parsing attempt
P33M Mar 5, 2026
397d0e6
mmc: sd: add quirk for buggy CMD49 handling
P33M Mar 5, 2026
87a401c
mmc: sd: Transcend cards need a CMD49 quirk
P33M Mar 5, 2026
da91f3e
mmc: sd: Biwin cards need a CMD49 quirk
P33M Mar 5, 2026
a4dfd82
mmc: sd: HACK add module parameter to allow CQ write depth modification
P33M Mar 9, 2026
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mmc: sd: Biwin cards need a CMD49 quirk 
The Biwin MS160 line of cards have a broken CMD49 handler and require
this workaround. The CID match is somewhat broad, but the card name
appears to be unique to these cards.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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P33M committed Mar 5, 2026
commit da91f3ed57f4bf7d9716a359fd9143224f33b734
1 change: 1 addition & 0 deletions drivers/mmc/core/card.h
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Expand Up @@ -90,6 +90,7 @@ struct mmc_fixup {
#define CID_MANFID_SAMSUNG 0x15
#define CID_MANFID_SAMSUNG_SD 0x1b
#define CID_MANFID_APACER 0x27
#define CID_MANFID_BIWIN_SD 0x4E
#define CID_MANFID_SWISSBIT 0x5D
#define CID_MANFID_KINGSTON 0x70
#define CID_MANFID_TRANSCEND_SD 0x74
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5 changes: 5 additions & 0 deletions drivers/mmc/core/quirks.h
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Expand Up @@ -81,6 +81,11 @@ static const struct mmc_fixup __maybe_unused mmc_sd_fixups[] = {
cid_rev(2, 0, 0, 0), -1ull, SDIO_ANY_ID, SDIO_ANY_ID, add_quirk_sd,
MMC_QUIRK_NONSTD_SD_CMD49, EXT_CSD_REV_ANY),

/* Certain Biwin cards need a CMD49 workaround */
_FIXUP_EXT("SMI ", CID_MANFID_BIWIN_SD, 0x4257, CID_YEAR_ANY, CID_MONTH_ANY,
cid_rev(1, 0, 2025, 0), -1ull, SDIO_ANY_ID, SDIO_ANY_ID, add_quirk_sd,
MMC_QUIRK_NONSTD_SD_CMD49, EXT_CSD_REV_ANY),

/* SD A2 allow-list - only trust CQ on these cards */
/* Raspberry Pi A2 cards */
_FIXUP_EXT(CID_NAME_ANY, CID_MANFID_LONGSYS_SD, 0x4c53, CID_YEAR_ANY, CID_MONTH_ANY,
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