[PATCH 5.18 157/158] ASoC: SOF: Intel: disable IMR boot when resuming from ACPI S4 and S5 states

Greg Kroah-Hartman
2022-07-27T17:46:42Z

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

commit 391153522d186f19a008d824bb3a05950351ce6c upstream.

The IMR was assumed to be preserved when suspending to S4 and S5
states, but community reports invalidate that assumption, the hardware
seems to be powered off and the IMR memory content cleared.

Make sure regular boot with firmware download is used for S4 and S5.

BugLink: https://github.com/thesofproject/sof/issues/5892
Fixes: 5fb5f51185126 ("ASoC: SOF: Intel: hda-loader: add IMR restore support")
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20220616201818.130802-4-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/soc/sof/intel/hda-loader.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/sound/soc/sof/intel/hda-loader.c
+++ b/sound/soc/sof/intel/hda-loader.c
@@ -397,7 +397,8 @@ int hda_dsp_cl_boot_firmware(struct snd_
struct firmware stripped_firmware;
int ret, ret1, i;

- if ((sdev->fw_ready.flags & SOF_IPC_INFO_D3_PERSISTENT) &&
+ if ((sdev->system_suspend_target < SOF_SUSPEND_S4) &&
+ (sdev->fw_ready.flags & SOF_IPC_INFO_D3_PERSISTENT) &&
!(sof_debug_check_flag(SOF_DBG_IGNORE_D3_PERSISTENT)) &&
!sdev->first_boot) {
dev_dbg(sdev->dev, "IMR restore supported, booting from IMR directly\n");