From e33625c84b75e4f078d7f9bf58f01fe71ab99642 Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald Date: Fri, 16 Feb 2024 14:05:35 +0000 Subject: ASoC: cs35l56: Must clear HALO_STATE before issuing SYSTEM_RESET The driver must write 0 to HALO_STATE before sending the SYSTEM_RESET command to the firmware. HALO_STATE is in DSP memory, which is preserved across a soft reset. The SYSTEM_RESET command does not change the value of HALO_STATE. There is period of time while the CS35L56 is resetting, before the firmware has started to boot, where a read of HALO_STATE will return the value it had before the SYSTEM_RESET. If the driver does not clear HALO_STATE, this would return BOOT_DONE status even though the firmware has not booted. Signed-off-by: Richard Fitzgerald Fixes: 8a731fd37f8b ("ASoC: cs35l56: Move utility functions to shared file") Link: https://msgid.link/r/20240216140535.1434933-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown --- sound/soc/codecs/cs35l56-shared.c | 1 + 1 file changed, 1 insertion(+) (limited to 'sound/soc/codecs') diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c index 995d979b6d87..cb4e83126b08 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -335,6 +335,7 @@ void cs35l56_wait_min_reset_pulse(void) EXPORT_SYMBOL_NS_GPL(cs35l56_wait_min_reset_pulse, SND_SOC_CS35L56_SHARED); static const struct reg_sequence cs35l56_system_reset_seq[] = { + REG_SEQ0(CS35L56_DSP1_HALO_STATE, 0), REG_SEQ0(CS35L56_DSP_VIRTUAL1_MBOX_1, CS35L56_MBOX_CMD_SYSTEM_RESET), }; -- cgit v1.2.3-59-g8ed1b