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drm/mediatek: Separate getting larb device to a function 

To make the code cleaner, separate getting larb device to
a function.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
CK Hu 2020-11-17 15:55:26 +08:00 committed by Chun-Kuang Hu
parent 6ea6f82767
commit 926df14ec5
1 changed files with 32 additions and 25 deletions
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57
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
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@ -465,19 +465,41 @@ unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
return ret;
}
static int mtk_ddp_get_larb_dev(struct device_node *node, struct mtk_ddp_comp *comp,
struct device *dev)
{
struct device_node *larb_node;
struct platform_device *larb_pdev;
larb_node = of_parse_phandle(node, "mediatek,larb", 0);
if (!larb_node) {
dev_err(dev, "Missing mediadek,larb phandle in %pOF node\n", node);
return -EINVAL;
}
larb_pdev = of_find_device_by_node(larb_node);
if (!larb_pdev) {
dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
of_node_put(larb_node);
return -EPROBE_DEFER;
}
of_node_put(larb_node);
comp->larb_dev = &larb_pdev->dev;
return 0;
}
int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
enum mtk_ddp_comp_id comp_id, const struct mtk_ddp_comp_funcs *funcs)
{
struct platform_device *comp_pdev;
struct device *dev;
enum mtk_ddp_comp_type type;
struct device_node *larb_node;
struct platform_device *larb_pdev;
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
struct resource res;
struct cmdq_client_reg cmdq_reg;
int ret;
#endif
int ret;
if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
return -EINVAL;
@ -529,30 +551,15 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
#endif
/* Only DMA capable components need the LARB property */
comp->larb_dev = NULL;
if (type != MTK_DISP_OVL &&
type != MTK_DISP_OVL_2L &&
type != MTK_DISP_RDMA &&
type != MTK_DISP_WDMA)
return 0;
larb_node = of_parse_phandle(node, "mediatek,larb", 0);
if (!larb_node) {
dev_err(dev,
"Missing mediadek,larb phandle in %pOF node\n", node);
return -EINVAL;
if (type == MTK_DISP_OVL ||
type == MTK_DISP_OVL_2L ||
type == MTK_DISP_RDMA ||
type == MTK_DISP_WDMA) {
ret = mtk_ddp_get_larb_dev(node, comp, dev);
if (ret)
return ret;
}
larb_pdev = of_find_device_by_node(larb_node);
if (!larb_pdev) {
dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
of_node_put(larb_node);
return -EPROBE_DEFER;
}
of_node_put(larb_node);
comp->larb_dev = &larb_pdev->dev;
return 0;
}