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Commit d62f2a08 authored by Vinod Koul's avatar Vinod Koul Committed by Mark Brown
Browse files

ASoC: Intel: sst: add runtime power management handling 



This patch adds the runtime pm handlers, the driver already has code for
get/put for runtime pm and only these handlers being missing.

Signed-off-by: default avatarSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 1a6db0bd

sound/soc/intel/sst/sst.c

+67 −0
Original line number Diff line number Diff line
@@ -152,6 +152,23 @@ static irqreturn_t intel_sst_irq_thread_mrfld(int irq, void *context) 
	return IRQ_HANDLED;

}



static int sst_save_dsp_context_v2(struct intel_sst_drv *sst)

{

	int ret = 0;



	ret = sst_prepare_and_post_msg(sst, SST_TASK_ID_MEDIA, IPC_CMD,

			IPC_PREP_D3, PIPE_RSVD, 0, NULL, NULL,

			true, true, false, true);



	if (ret < 0) {

		dev_err(sst->dev, "not suspending FW!!, Err: %d\n", ret);

		return -EIO;

	}



	return 0;

}





static struct intel_sst_ops mrfld_ops = {

	.interrupt = intel_sst_interrupt_mrfld,

	.irq_thread = intel_sst_irq_thread_mrfld,
@@ -160,6 +177,7 @@ static struct intel_sst_ops mrfld_ops = { 
	.reset = intel_sst_reset_dsp_mrfld,

	.post_message = sst_post_message_mrfld,

	.process_reply = sst_process_reply_mrfld,

	.save_dsp_context =  sst_save_dsp_context_v2,

	.alloc_stream = sst_alloc_stream_mrfld,

	.post_download = sst_post_download_mrfld,

};
@@ -418,6 +436,50 @@ static void intel_sst_remove(struct pci_dev *pci) 
	pci_set_drvdata(pci, NULL);

}



static int intel_sst_runtime_suspend(struct device *dev)

{

	int ret = 0;

	struct intel_sst_drv *ctx = dev_get_drvdata(dev);



	if (ctx->sst_state == SST_RESET) {

		dev_dbg(dev, "LPE is already in RESET state, No action\n");

		return 0;

	}

	/* save fw context */

	if (ctx->ops->save_dsp_context(ctx))

		return -EBUSY;



	/* Move the SST state to Reset */

	sst_set_fw_state_locked(ctx, SST_RESET);



	synchronize_irq(ctx->irq_num);

	flush_workqueue(ctx->post_msg_wq);



	return ret;

}



static int intel_sst_runtime_resume(struct device *dev)

{

	int ret = 0;

	struct intel_sst_drv *ctx = dev_get_drvdata(dev);



	mutex_lock(&ctx->sst_lock);

	if (ctx->sst_state == SST_RESET) {

		ret = sst_load_fw(ctx);

		if (ret) {

			dev_err(dev, "FW download fail %d\n", ret);

			ctx->sst_state = SST_RESET;

		}

	}

	mutex_unlock(&ctx->sst_lock);

	return ret;

}



static const struct dev_pm_ops intel_sst_pm = {

	.runtime_suspend = intel_sst_runtime_suspend,

	.runtime_resume = intel_sst_runtime_resume,

};



/* PCI Routines */

static struct pci_device_id intel_sst_ids[] = {

	{ PCI_VDEVICE(INTEL, SST_MRFLD_PCI_ID), 0},
@@ -429,6 +491,11 @@ static struct pci_driver sst_driver = { 
	.id_table = intel_sst_ids,

	.probe = intel_sst_probe,

	.remove = intel_sst_remove,

#ifdef CONFIG_PM

	.driver = {

		.pm = &intel_sst_pm,

	},

#endif

};



module_pci_driver(sst_driver);