diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2023-04-11 16:25:28 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-04-12 17:34:36 +0100 |
| commit | 59322d35179987e85b593e504fd334de8683c835 (patch) | |
| tree | 1f5b4c06b109bcda54e14bc3538077be11b7468d /include/sound | |
| parent | 39a594dc0b4ac949edf221db33c7061c45e2c90b (diff) | |
| download | linux-59322d35179987e85b593e504fd334de8683c835.tar.gz | |
ASoC: cs35l56: Re-patch firmware after system suspend
Check during cs35l56_system_resume() whether the firmware patch must
be applied again.
The FIRMWARE_MISSING flag in the PROTECTION_STATUS register indicates
whether the firmware has been patched.
In non-secure mode the FIRMWARE_MISSING flag is cleared at the end of
dsp_work(). If it is set after system-resume we know that dsp_work()
must be run again.
In secure mode the pre-OS loader will have done the secure patching
and cleared the FIRMWARE_MISSING flag. So this flag does not tell us
whether firmware memory was lost. But the driver could only be
downloading non-secure tunings, which is always safe to do.
If the driver has control of RESET we will have asserted it during
suspend so the firmware patch will have been lost. The driver would only
have control of RESET in non-secure mode.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/168122674550.26.8545058503709956172@mailman-core.alsa-project.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/cs35l56.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h index 5f8ea2dfaa21..b3300bce74f4 100644 --- a/include/sound/cs35l56.h +++ b/include/sound/cs35l56.h @@ -95,6 +95,7 @@ #define CS35L56_MAIN_RENDER_USER_MUTE 0x3400024 #define CS35L56_MAIN_RENDER_USER_VOLUME 0x340002C #define CS35L56_MAIN_POSTURE_NUMBER 0x3400094 +#define CS35L56_PROTECTION_STATUS 0x34000D8 #define CS35L56_TRANSDUCER_ACTUAL_PS 0x3400150 #define CS35L56_DSP1_YMEM_UNPACKED24_6141 0x3405FF4 #define CS35L56_DSP1_PMEM_0 0x3800000 @@ -216,6 +217,9 @@ #define CS35L56_MAIN_POSTURE_MAX 255 #define CS35L56_MAIN_POSTURE_MASK CS35L56_MAIN_POSTURE_MAX +/* CS35L56_PROTECTION_STATUS */ +#define CS35L56_FIRMWARE_MISSING BIT(0) + /* Software Values */ #define CS35L56_HALO_STATE_SHUTDOWN 1 #define CS35L56_HALO_STATE_BOOT_DONE 2 |