Sd cqe allowlist 6.12 #6600
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Sd cqe allowlist 6.12 #6600
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popcornmix
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We want to be able to control the interop surface exposed by Command Queueing across bcm2712 products to a more restrictive default, with selectable disable and permissive behaviour. Changing the bool to a cell lets it relay a tristate value. Also add the override parameter to CM5 as CM5-lite may interface with arbitrary eMMC or SD cards. (Reimplemented on 6.12 - bcm2712 dts now has a downstream/upstream split.) Signed-off-by: Jonathan Bell <[email protected]>
We have found that many SD cards in the field, even of the same make and model, have latent bugs in their CQ implementation. Some product lines have fewer bugs with newer manufacture dates, but this is not a guarantee that a particular card is at a particular firmware revision level. Many of these bugs lead to card hangs or data corruption. Add a quirk to mark a card as having a tested, working CQ implementation and ignore the capability if absent. Signed-off-by: Jonathan Bell <[email protected]>
These cards have a known-good CQ implementation and are based on a Longsys product. Add the MANFID for Longsys SD, and the particular CID details for the Pi card. Signed-off-by: Jonathan Bell <[email protected]>
Implement a tristate-style option for "supports-cqe". If the property is absent or zero, disable CQ completely. For 1, enable CQ unconditionally for eMMC cards, and known-good SD cards. For 2, enable for eMMC cards, and all SD cards that are not known-bad. The sdhci-brcmstb driver needs to know about the tristate as its probe sequence would otherwise override a disable in mmc_of_parse(). Signed-off-by: Jonathan Bell <[email protected]>
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Dupe of #6591 as cherry-picks of the first and third commits caused conflicts.