[PATCH v5 08/14] media: platform: mtk-mdp3: avoid multiple driver registrations

[Moudy Ho]

The amount of MDP3 driver probes is determined by the registered
clocks of MMSYS.
Since MT8195 MDP3 utilizes VPPSYS0 and VPPSYS1, it's necessary to
prevent multiple driver registrations.

Signed-off-by: Moudy Ho <moudy...@mediatek.com>
---
 drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c  | 1 +
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 8 ++++++++
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h | 1 +
 3 files changed, 10 insertions(+)

diff --git a/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c 
b/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c
index b7efdafb1620..8eac09f9d3dd 100644
--- a/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c
+++ b/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c
@@ -410,6 +410,7 @@ static const struct mdp_pipe_info mt8183_pipe_info[] = {
 
 const struct mtk_mdp_driver_data mt8183_mdp_driver_data = {
        .mdp_plat_id = MT8183,
+       .mdp_con_res = 0x14001000,
        .mdp_probe_infra = mt8183_mdp_probe_infra,
        .mdp_cfg = &mt8183_plat_cfg,
        .mdp_mutex_table_idx = mt8183_mutex_idx,
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c 
b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index 239f496b7a30..06b7d2b0b814 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -161,6 +161,7 @@ static int mdp_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct mdp_dev *mdp;
        struct platform_device *mm_pdev, *mm2_pdev;
+       struct resource *res;
        int ret, i, mutex_id;
 
        mdp = kzalloc(sizeof(*mdp), GFP_KERNEL);
@@ -172,6 +173,12 @@ static int mdp_probe(struct platform_device *pdev)
        mdp->pdev = pdev;
        mdp->mdp_data = of_device_get_match_data(&pdev->dev);
 
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (res->start != mdp->mdp_data->mdp_con_res) {
+               platform_set_drvdata(pdev, mdp);
+               goto success_return;
+       }
+
        mm_pdev = __get_pdev_by_id(pdev, NULL, MDP_INFRA_MMSYS);
        if (IS_ERR_OR_NULL(mm_pdev)) {
                ret = -ENODEV;
@@ -279,6 +286,7 @@ static int mdp_probe(struct platform_device *pdev)
                goto err_unregister_device;
        }
 
+success_return:
        dev_dbg(dev, "mdp-%d registered successfully\n", pdev->id);
        return 0;
 
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h 
b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
index e4ffa25b9271..a063a655248c 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
@@ -61,6 +61,7 @@ enum mdp_pipe_id {
 
 struct mtk_mdp_driver_data {
        const int mdp_plat_id;
+       const resource_size_t mdp_con_res;
        const struct of_device_id *mdp_probe_infra;
        const struct mdp_platform_config *mdp_cfg;
        const u32 *mdp_mutex_table_idx;
-- 
2.18.0