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| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2024-02-16 17:05:35 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-02-19 19:58:02 +0300 |
| commit | e33625c84b75e4f078d7f9bf58f01fe71ab99642 (patch) | |
| tree | 00fa189ab7d1a46c2a1fbfa8d9bf71bafd1b0c6e /sound/soc/codecs/cs35l56-shared.c | |
| parent | 0db0c1770834f39e11a2902e20e1f11a482f4465 (diff) | |
| download | linux-e33625c84b75e4f078d7f9bf58f01fe71ab99642.tar.xz | |
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 <rf@opensource.cirrus.com>
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 <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/cs35l56-shared.c')
| -rw-r--r-- | sound/soc/codecs/cs35l56-shared.c | 1 |
1 files changed, 1 insertions, 0 deletions
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), }; |