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video: rockchip: mpp: mpp_iommu_refresh via rockchip_iommu funcs

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reason:
1. might_sleep is called by pm_runtime_xx, thus, it cannot covered by
   rcu_read_lock/unlock which is atomic context.
2. it need use device_links_read_lock/unlock when meets
   dev->links.suppliers. however, device_links_read_lock/unlock are
   not export symbols.
thus use rockchip_iommu_disable/enable instead.

Change-Id: I545eced499533383f6cfbdf81e696064f42b6c3e
Signed-off-by: Ding Wei <leo.ding@rock-chips.com>
This commit is contained in:
Ding Wei
2021-10-22 18:11:29 +08:00
committed by Tao Huang
parent 46dcc1502c
commit 78162b4b90
1 changed files with 8 additions and 20 deletions
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28
drivers/video/rockchip/mpp/mpp_iommu.c
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@@ -21,6 +21,7 @@
#ifdef CONFIG_ARM_DMA_USE_IOMMU
#include <asm/dma-iommu.h>
#endif
#include <soc/rockchip/rockchip_iommu.h>
#include "mpp_debug.h"
#include "mpp_iommu.h"
@@ -460,27 +461,14 @@ int mpp_iommu_remove(struct mpp_iommu_info *info)
int mpp_iommu_refresh(struct mpp_iommu_info *info, struct device *dev)
{
int i;
int usage_count;
struct device_link *link;
struct device *iommu_dev = &info->pdev->dev;
int ret;
rcu_read_lock();
usage_count = atomic_read(&iommu_dev->power.usage_count);
list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) {
for (i = 0; i < usage_count; i++)
pm_runtime_put_sync(link->supplier);
}
list_for_each_entry_rcu(link, &dev->links.suppliers, c_node) {
for (i = 0; i < usage_count; i++)
pm_runtime_get_sync(link->supplier);
}
rcu_read_unlock();
return 0;
/* disable iommu */
ret = rockchip_iommu_disable(dev);
if (ret)
return ret;
/* re-enable iommu */
return rockchip_iommu_enable(dev);
}
int mpp_iommu_flush_tlb(struct mpp_iommu_info *info)