In a virtualised configuration the runtime PM of the host and any guests aren't synchronised. But guests have to be able to tell the host when they suspend and resume and know, whether the host has been runtime suspended since that guests's topology had been sent to the host last time. This is needed to decide whether to re-send the topology again. To support this we add a new PM IPC message SOF_IPC_PM_VFE_POWER_STATUS and a reset counter to track the state of the DSP.
Signed-off-by: Guennadi Liakhovetski guennadi.liakhovetski@linux.intel.com --- include/sound/sof/header.h | 1 + sound/soc/sof/core.c | 2 ++ sound/soc/sof/ipc.c | 2 ++ sound/soc/sof/loader.c | 4 ++++ sound/soc/sof/sof-priv.h | 4 ++++ 5 files changed, 13 insertions(+)
diff --git a/include/sound/sof/header.h b/include/sound/sof/header.h index b794795..1aaccb5a 100644 --- a/include/sound/sof/header.h +++ b/include/sound/sof/header.h @@ -77,6 +77,7 @@ #define SOF_IPC_PM_CLK_REQ SOF_CMD_TYPE(0x006) #define SOF_IPC_PM_CORE_ENABLE SOF_CMD_TYPE(0x007) #define SOF_IPC_PM_GATE SOF_CMD_TYPE(0x008) +#define SOF_IPC_PM_VFE_POWER_STATUS SOF_CMD_TYPE(0x010)
/* component runtime config - multiple different types */ #define SOF_IPC_COMP_SET_VALUE SOF_CMD_TYPE(0x001) diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index ca30d67..42dd72e 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -8,6 +8,7 @@ // Author: Liam Girdwood liam.r.girdwood@linux.intel.com //
+#include <linux/atomic.h> #include <linux/firmware.h> #include <linux/module.h> #include <sound/soc.h> @@ -311,6 +312,7 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data) #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES) sdev->extractor_stream_tag = SOF_PROBE_INVALID_NODE_ID; #endif + atomic_set(&sdev->reset_count, 0); dev_set_drvdata(dev, sdev);
/* check all mandatory ops */ diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index 6fa501c1..b0b38ca 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -105,6 +105,8 @@ static void ipc_log_header(struct device *dev, u8 *text, u32 cmd) str2 = "CLK_REQ"; break; case SOF_IPC_PM_CORE_ENABLE: str2 = "CORE_ENABLE"; break; + case SOF_IPC_PM_VFE_POWER_STATUS: + str2 = "VFE_POWER_STATUS"; break; default: str2 = "unknown type"; break; } diff --git a/sound/soc/sof/loader.c b/sound/soc/sof/loader.c index 1f2e0be..80854c9 100644 --- a/sound/soc/sof/loader.c +++ b/sound/soc/sof/loader.c @@ -10,6 +10,7 @@ // Generic firmware loader. //
+#include <linux/atomic.h> #include <linux/firmware.h> #include <sound/sof.h> #include "ops.h" @@ -611,6 +612,9 @@ int snd_sof_run_firmware(struct snd_sof_dev *sdev) /* fw boot is complete. Update the active cores mask */ sdev->enabled_cores_mask = init_core_mask;
+ /* increment reset count */ + atomic_add(1, &sdev->reset_count); + return 0; } EXPORT_SYMBOL(snd_sof_run_firmware); diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 922b671..0792125 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -11,6 +11,7 @@ #ifndef __SOUND_SOC_SOF_PRIV_H #define __SOUND_SOC_SOF_PRIV_H
+#include <linux/atomic.h> #include <linux/device.h> #include <sound/hdaudio.h> #include <sound/sof.h> @@ -425,6 +426,9 @@ struct snd_sof_dev { unsigned int extractor_stream_tag; #endif
+ /* VirtIO fields for host and guest */ + atomic_t reset_count; + /* DMA for Trace */ struct snd_dma_buffer dmatb; struct snd_dma_buffer dmatp;