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soc: soundwire: Check for clock source before clock switch

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

Change-Id: I8a7a116cc956f427af677b413928dace5a39a23d
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
This commit is contained in:
Sudheer Papothi
2019-12-05 01:14:47 +05:30
committed by Gerrit - the friendly Code Review server
parent f34687bd3a
commit fd25834b84
2 changed files with 12 additions and 2 deletions
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13
soc/swr-mstr-ctrl.c
View File

@@ -3101,9 +3101,18 @@ int swrm_wcd_notify(struct platform_device *pdev, u32 id, void *data)
* next activity on soundwire will request clock from new clock * next activity on soundwire will request clock from new clock
* source. * source.
*/ */
if (!data) {
dev_err(swrm->dev, "%s: data is NULL for id:%d\n",
__func__, id);
ret = -EINVAL;
break;
}
mutex_lock(&swrm->mlock); mutex_lock(&swrm->mlock);
if (swrm->state == SWR_MSTR_UP) if (swrm->clk_src != *(int *)data) {
swrm_device_suspend(&pdev->dev); if (swrm->state == SWR_MSTR_UP)
swrm_device_suspend(&pdev->dev);
swrm->clk_src = *(int *)data;
}
mutex_unlock(&swrm->mlock); mutex_unlock(&swrm->mlock);
break; break;
case SWR_CLK_FREQ: case SWR_CLK_FREQ:

1
soc/swr-mstr-ctrl.h
View File

@@ -187,6 +187,7 @@ struct swr_mstr_ctrl {
u32 swr_irq_wakeup_capable; u32 swr_irq_wakeup_capable;
int hw_core_clk_en; int hw_core_clk_en;
int aud_core_clk_en; int aud_core_clk_en;
int clk_src;
#ifdef CONFIG_DEBUG_FS #ifdef CONFIG_DEBUG_FS
struct dentry *debugfs_swrm_dent; struct dentry *debugfs_swrm_dent;
struct dentry *debugfs_peek; struct dentry *debugfs_peek;