On 6/3/2025 7:31 AM, Alexander Wilhelm wrote: > Hello devs, > > I need help to bring up the QCN9274 with ath12k driver on big endian PowerPC > platform. I've already found some issues and fixed the MHI start procedure [1] > and QMI conversion [2]. Furthermore I added some endianness fixes on 'qmi.c' > file and could successfully transfer the firmware and boardfile to the wireless > module. But the firmware does not start properly. > > I'm trying to analyze the error and don't fully understand what is happening. > While 'ath12k_htc_connect_service' I expect a successful response from > 'ath12k_htc_send', but the connection then is timeout. It seems that I should > receive a message with length of 20 and at least I get one. But then the driver > remains endless in the 'ath12k_ce_recv_process_cb' and I always get a message of > length 0 from the 'ath12k_hal_ce_dst_status_get_length' until RCU stall happens. > > More interesting is the 'CE_ATTR_BYTE_SWAP_DATA' from ath11k, that is still used > in ath12k code, but HAL structures now are swapped in driver itself at the same > time. Is that correct? That does NOT sound correct. What happens if you unconditionally keep the BYTE_SWAP flag disabled? Note that to date the ath12k driver has not been tested internally on a big endian host. But your message at least has folks talking about it now... /jeff
