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Commit 8c50f2f7 authored by Sudheer Papothi's avatar Sudheer Papothi Committed by Gerrit - the friendly Code Review server
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soc: soundwire: Check for clock source before clock switch 



Check for soundwire clock source before clock switch to avoid
redundant clock switch for the same clock source.

Change-Id: I8a7a116cc956f427af677b413928dace5a39a23d
Signed-off-by: default avatarSudheer Papothi <spapothi@codeaurora.org>
parent fc3adb04

soc/swr-mstr-ctrl.c

+11 −2
Original line number Diff line number Diff line
@@ -3074,9 +3074,18 @@ int swrm_wcd_notify(struct platform_device *pdev, u32 id, void *data) 
		 * next activity on soundwire will request clock from new clock

		 * source.

		 */

		if (!data) {

			dev_err(swrm->dev, "%s: data is NULL for id:%d\n",

				__func__, id);

			ret = -EINVAL;

			break;

		}

		mutex_lock(&swrm->mlock);

		if (swrm->clk_src != *(int *)data) {

			if (swrm->state == SWR_MSTR_UP)

				swrm_device_suspend(&pdev->dev);

			swrm->clk_src = *(int *)data;

		}

		mutex_unlock(&swrm->mlock);

		break;

	case SWR_CLK_FREQ:

soc/swr-mstr-ctrl.h

+1 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ struct swr_mstr_ctrl { 
	u32 swr_irq_wakeup_capable;

	int hw_core_clk_en;

	int aud_core_clk_en;

	int clk_src;

#ifdef CONFIG_DEBUG_FS

	struct dentry *debugfs_swrm_dent;

	struct dentry *debugfs_peek;