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Subject: media: platform: mtk-mdp3: avoid multiple driver registrations
Author: Moudy Ho <moudy...@mediatek.com>
Date: Wed Dec 20 11:18:32 2023 +0100
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>
Reviewed-by: AngeloGioacchino Del Regno
<angelogioacchino.delre...@collabora.com>
Signed-off-by: Sebastian Fricke <sebastian.fri...@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>
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 fe92c0474bfa..6f77c33074ec 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 4802b20d7f20..6ddb5e075f5d 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -211,6 +211,7 @@ static int mdp_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct mdp_dev *mdp;
struct platform_device *mm_pdev;
+ struct resource *res;
int ret, i, mutex_id;
mdp = kzalloc(sizeof(*mdp), GFP_KERNEL);
@@ -222,6 +223,12 @@ 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;
+ }
+
ret = mdp_mm_subsys_deploy(mdp, MDP_INFRA_MMSYS);
if (ret)
goto err_destroy_device;
@@ -311,6 +318,7 @@ 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 ece6509666fd..22d1b17ef2fc 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h
@@ -71,6 +71,7 @@ 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;
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