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[WIP] kernel behavior for Privacy shutter #103

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[WIP] kernel behavior for Privacy shutter #103

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2a73944
Initial plan
Copilot Sep 16, 2026
1923201
Force synchronous ISYS suspend on close
Copilot Sep 16, 2026
ee956e4
Stop sensor before FW flush/close on stream stop
deep0294 Sep 17, 2026
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16 changes: 9 additions & 7 deletions drivers/media/pci/intel/ipu7/ipu7-isys-video.c
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Original file line number Diff line number Diff line change
Expand Up @@ -857,19 +857,16 @@ int ipu7_isys_video_set_streaming(struct ipu7_isys_video *av, int state,
sd = &stream->asd->sd;
r_pad = media_pad_remote_pad_first(&av->pad);
if (!state) {
stop_streaming_firmware(av);

/* stop sub-device which connects with video */
/* stop sensor first so no new frame cmds race the FW abort */
dev_dbg(dev, "disable streams %s pad:%d mask:0x%llx\n",
sd->name, r_pad->index, BIT_ULL(r_stream));
ret = v4l2_subdev_disable_streams(sd, r_pad->index,
BIT_ULL(r_stream));
if (ret) {
if (ret)
dev_err(dev, "disable streams %s failed with %d\n",
sd->name, ret);
return ret;
}

stop_streaming_firmware(av);
close_streaming_firmware(av);
ipu7_cleanup_fw_msg_bufs_by_stream_id(av->isys, stream_id);
} else {
Expand Down Expand Up @@ -1004,7 +1001,12 @@ void ipu7_isys_fw_close(struct ipu7_isys *isys)
ipu7_fw_isys_close(isys);

mutex_unlock(&isys->mutex);
pm_runtime_put(&isys->adev->auxdev.dev);
/*
* Force an immediate synchronous power-cycle of the IS island on
* every close, ignoring autosuspend, so S2B/B2O return to POR state
* even if STREAM_FLUSH/STREAM_CLOSE did not complete cleanly.
*/
pm_runtime_put_sync_suspend(&isys->adev->auxdev.dev);
}
#endif

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