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media: platform: cif: handle reserved memory for dvp/mipi_lvds device

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Signed-off-by: Hu Kejun <william.hu@rock-chips.com>
Change-Id: Ied588e717d879dff9c0a2baa9c45bcebfcf2800b
This commit is contained in:
Hu Kejun
2020-08-24 18:59:08 +08:00
parent 790eee2211
commit 672c39e381
1 changed files with 26 additions and 0 deletions
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26
drivers/media/platform/rockchip/cif/dev.c
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@@ -185,6 +185,24 @@ unsigned int rkcif_read_register(struct rkcif_device *dev,
return val;
}
static bool is_iommu_enable(struct device *dev)
{
struct device_node *iommu;
iommu = of_parse_phandle(dev->of_node, "iommus", 0);
if (!iommu) {
dev_info(dev, "no iommu attached, using non-iommu buffers\n");
return false;
} else if (!of_device_is_available(iommu)) {
dev_info(dev, "iommu is disabled, using non-iommu buffers\n");
of_node_put(iommu);
return false;
}
of_node_put(iommu);
return true;
}
/**************************** pipeline operations *****************************/
static int __cif_pipeline_prepare(struct rkcif_pipeline *p,
struct media_entity *me)
@@ -800,6 +818,7 @@ static int rkcif_plat_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct rkcif_device *cif_dev;
const struct rkcif_match_data *data;
bool iommu_en;
int ret;
sprintf(rkcif_version, "v%02x.%02x.%02x",
@@ -826,6 +845,13 @@ static int rkcif_plat_probe(struct platform_device *pdev)
rkcif_attach_hw(cif_dev);
iommu_en = is_iommu_enable(dev);
if (!iommu_en) {
ret = of_reserved_mem_device_init(dev);
if (ret)
dev_info(dev, "No reserved memory region assign to CIF\n");
}
ret = rkcif_plat_init(cif_dev, node, data->inf_id);
if (ret)
return ret;