On Tue, 18 Oct 2022 15:40:04 +0300, Peter Ujfalusi wrote:
The IPC4 use of doorbell registers leaves some corner cases not well defined and the 'correct sequences' are subjective in a sense. The DSP doorbell registers are used as separate and independent channels and the sequences for host -> DSP -> host (reply) can be racy.
For example: The ACKing of a received message can happen before the firmware sends the reply or it can as well happen after the reply has been sent and received by the host. Both can be considered 'correct sequences' but they need different handling.
[...]
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/4] ASoC: SOF: ipc4: Log the tx message before sending it commit: 2d91d5715f5f3b24456ede20dbbe967a1d2a0a3e [2/4] ASoC: SOF: Intel: ipc4: Read the interrupt reason registers at the same time commit: c8ed7ce242db83ca2c4e9eab557a88adbae5ef6a [3/4] ASoC: SOF: Intel: ipc4: Wait for channel to be free before sending a message commit: 483e4cdfb502e6bea6b0a226a3ff7c22e60153de [4/4] ASoC: SOF: Intel: ipc4: Ack a received reply or notification separately commit: 010c050fe9ea263e3fc17493822117610a23f662
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
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Thanks, Mark