Is QSPI (Quad SPI) Supported by the Saleae Software?

No, the Saleae software does not yet include a QSPI analyzer. It does include an SPI analyzer as well as a synchronous parallel analyzer that could be configured to operate in a 4-bit mode, but it will not automatically combine the 4-bit nibbles into 8-bit bytes.

We plan to support QSPI in the future but don't currently have it on the road map. In the meantime, if you are interested in developing a custom protocol analyzer, you can find details here: Protocol Analyzer SDK

And you can find the supported protocols list here: What protocols are supported?

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