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ASoC: SOF: amd: add post-firmware-run delay for ACP7x

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Add sof_acp7x_post_fw_run_delay() to introduce a small delay after
firmware boot completion on resume to avoid DSP entering an
unrecoverable state.

Register it as post_fw_run callback only when the ACPI property
acp-sof-post_fw_run_delay is set, following the same pattern used
by the Vangogh platform.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://patch.msgid.link/20260701095759.1012929-11-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2026-07-01 15:25:11 +05:30 committed by Mark Brown
parent c04de2d88c
commit 7a81f54a04
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GPG Key ID: 24D68B725D5487D0
1 changed files with 28 additions and 0 deletions
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28
sound/soc/sof/amd/acp7x.c
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@ -11,6 +11,7 @@
* Hardware interface for Audio DSP on ACP7.B/7.F platforms
*/
#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
@ -127,11 +128,29 @@ static struct snd_soc_dai_driver acp7x_sof_dai[] = {
},
};
static int sof_acp7x_post_fw_run_delay(struct snd_sof_dev *sdev)
{
/*
* Resuming from suspend in some cases may cause the DSP firmware
* to enter an unrecoverable faulty state. Delaying a bit any host
* to DSP transmission right after firmware boot completion seems
* to resolve the issue.
*/
if (!sdev->first_boot)
usleep_range(100, 150);
return 0;
}
struct snd_sof_dsp_ops sof_acp7x_ops;
EXPORT_SYMBOL_NS(sof_acp7x_ops, "SND_SOC_SOF_AMD_COMMON");
int sof_acp7x_ops_init(struct snd_sof_dev *sdev)
{
struct acpi_device *adev = ACPI_COMPANION(&to_pci_dev(sdev->dev)->dev);
const union acpi_object *obj;
int acp_sof_post_fw_run_delay = 0;
/* common defaults */
memcpy(&sof_acp7x_ops, &sof_acp_common_ops, sizeof(struct snd_sof_dsp_ops));
@ -140,5 +159,14 @@ int sof_acp7x_ops_init(struct snd_sof_dev *sdev)
sof_acp7x_ops.probe = amd_sof_acp7x_probe;
sof_acp7x_ops.remove = amd_sof_acp7x_remove;
if (adev) {
if (!acpi_dev_get_property(adev, "acp-sof-post_fw_run_delay",
ACPI_TYPE_INTEGER, &obj))
acp_sof_post_fw_run_delay = obj->integer.value;
}
if (acp_sof_post_fw_run_delay)
sof_acp7x_ops.post_fw_run = sof_acp7x_post_fw_run_delay;
return 0;
}