linux-kernel - [PATCH v4 10/16] media: platform: mtk-mdp3: avoid multiple driver registrations

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Message-ID: <20230208092209.19472-11-moudy.ho@mediatek.com>
Date:   Wed, 8 Feb 2023 17:22:03 +0800
From:   Moudy Ho <moudy.ho@...iatek.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Moudy Ho <moudy.ho@...iatek.com>
Subject: [PATCH v4 10/16] media: platform: mtk-mdp3: avoid multiple driver registrations

The number of MDP3 driver probes depends on the registered clocks of MMSYS.
Because VPPSYS0 and VPPSYS1 are used in MT8195 MDP3, it is necessary to
avoid multiple driver registrations.

Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
---
 drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c  | 1 +
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 9 ++++++++-
 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h | 1 +
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c b/drivers/media/platform/mediatek/mdp3/mdp_cfg_data.c
index eafd2fbe39a0..0c65b64c6266 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 bf64f88c29fe..09cad71aef69 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;
@@ -209,7 +216,6 @@ static int mdp_probe(struct platform_device *pdev)
 		p = (id && mm2_pdev) ? mm2_pdev : mm_pdev;
 		m = (id && mm2_pdev) ?
 			mdp->mdp_mutex2 : mdp->mdp_mutex;
-
 		if (m[mutex_id])
 			continue;
 		m[mutex_id] = mtk_mutex_get(&p->dev);
@@ -278,6 +284,7 @@ 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