Merge tag 'mediatek-drm-next-6.6' of...

Merge tag 'mediatek-drm-next-6.6' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next

Mediatek DRM Next for Linux 6.6

1. Small mtk-dpi cleanups
2. DisplayPort: support eDP and aux-bus
3. Fix uninitialized symbol
4. Do not check for 0 return after calling platform_get_irq()
5. Convert to platform remove callback returning void
6. Fix coverity issues
7. Fix potential memory leak if vmap() fail
8. Fix void-pointer-to-enum-cast warning
9. Rid W=1 warnings from GPU
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230813152726.14802-1-chunkuang.hu@kernel.org

drivers/gpu/drm/mediatek/Kconfig

@@ -26,6 +26,7 @@ config DRM_MEDIATEK_DP
 	select PHY_MTK_DP
 	select DRM_DISPLAY_HELPER
 	select DRM_DISPLAY_DP_HELPER
+	select DRM_DP_AUX_BUS
 	help
 	  DRM/KMS Display Port driver for MediaTek SoCs.
 

drivers/gpu/drm/mediatek/mtk_cec.c

@@ -235,13 +235,12 @@ static int mtk_cec_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int mtk_cec_remove(struct platform_device *pdev)
+static void mtk_cec_remove(struct platform_device *pdev)
 {
 	struct mtk_cec *cec = platform_get_drvdata(pdev);
 
 	mtk_cec_htplg_irq_disable(cec);
 	clk_disable_unprepare(cec->clk);
-	return 0;
 }
 
 static const struct of_device_id mtk_cec_of_ids[] = {
@@ -252,7 +251,7 @@ MODULE_DEVICE_TABLE(of, mtk_cec_of_ids);
 
 struct platform_driver mtk_cec_driver = {
 	.probe = mtk_cec_probe,
-	.remove = mtk_cec_remove,
+	.remove_new = mtk_cec_remove,
 	.driver = {
 		.name = "mediatek-cec",
 		.of_match_table = mtk_cec_of_ids,

drivers/gpu/drm/mediatek/mtk_disp_aal.c

@@ -25,11 +25,6 @@ struct mtk_disp_aal_data {
 	bool has_gamma;
 };
 
-/**
- * struct mtk_disp_aal - DISP_AAL driver structure
- * @ddp_comp - structure containing type enum and hardware resources
- * @crtc - associated crtc to report irq events to
- */
 struct mtk_disp_aal {
 	struct clk *clk;
 	void __iomem *regs;
@@ -139,11 +134,9 @@ static int mtk_disp_aal_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_aal_remove(struct platform_device *pdev)
+static void mtk_disp_aal_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_aal_component_ops);
-
-	return 0;
 }
 
 static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
@@ -160,7 +153,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
 
 struct platform_driver mtk_disp_aal_driver = {
 	.probe		= mtk_disp_aal_probe,
-	.remove		= mtk_disp_aal_remove,
+	.remove_new	= mtk_disp_aal_remove,
 	.driver		= {
 		.name	= "mediatek-disp-aal",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_ccorr.c

@@ -33,11 +33,6 @@ struct mtk_disp_ccorr_data {
 	u32 matrix_bits;
 };
 
-/**
- * struct mtk_disp_ccorr - DISP_CCORR driver structure
- * @ddp_comp - structure containing type enum and hardware resources
- * @crtc - associated crtc to report irq events to
- */
 struct mtk_disp_ccorr {
 	struct clk *clk;
 	void __iomem *regs;
@@ -194,11 +189,9 @@ static int mtk_disp_ccorr_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_ccorr_remove(struct platform_device *pdev)
+static void mtk_disp_ccorr_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_ccorr_component_ops);
-
-	return 0;
 }
 
 static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
@@ -220,7 +213,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);
 
 struct platform_driver mtk_disp_ccorr_driver = {
 	.probe		= mtk_disp_ccorr_probe,
-	.remove		= mtk_disp_ccorr_remove,
+	.remove_new	= mtk_disp_ccorr_remove,
 	.driver		= {
 		.name	= "mediatek-disp-ccorr",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_color.c

@@ -131,11 +131,9 @@ static int mtk_disp_color_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_color_remove(struct platform_device *pdev)
+static void mtk_disp_color_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_color_component_ops);
-
-	return 0;
 }
 
 static const struct mtk_disp_color_data mt2701_color_driver_data = {
@@ -163,7 +161,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match);
 
 struct platform_driver mtk_disp_color_driver = {
 	.probe		= mtk_disp_color_probe,
-	.remove		= mtk_disp_color_remove,
+	.remove_new	= mtk_disp_color_remove,
 	.driver		= {
 		.name	= "mediatek-disp-color",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_gamma.c

@@ -182,11 +182,9 @@ static int mtk_disp_gamma_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_gamma_remove(struct platform_device *pdev)
+static void mtk_disp_gamma_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_gamma_component_ops);
-
-	return 0;
 }
 
 static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
@@ -208,7 +206,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
 
 struct platform_driver mtk_disp_gamma_driver = {
 	.probe		= mtk_disp_gamma_probe,
-	.remove		= mtk_disp_gamma_remove,
+	.remove_new	= mtk_disp_gamma_remove,
 	.driver		= {
 		.name	= "mediatek-disp-gamma",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_merge.c

@@ -294,11 +294,9 @@ static int mtk_disp_merge_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_merge_remove(struct platform_device *pdev)
+static void mtk_disp_merge_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_merge_component_ops);
-
-	return 0;
 }
 
 static const struct of_device_id mtk_disp_merge_driver_dt_match[] = {
@@ -310,7 +308,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_merge_driver_dt_match);
 
 struct platform_driver mtk_disp_merge_driver = {
 	.probe = mtk_disp_merge_probe,
-	.remove = mtk_disp_merge_remove,
+	.remove_new = mtk_disp_merge_remove,
 	.driver = {
 		.name = "mediatek-disp-merge",
 		.owner = THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_ovl.c

@@ -561,12 +561,10 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_ovl_remove(struct platform_device *pdev)
+static void mtk_disp_ovl_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_ovl_component_ops);
 	pm_runtime_disable(&pdev->dev);
-
-	return 0;
 }
 
 static const struct mtk_disp_ovl_data mt2701_ovl_driver_data = {
@@ -658,7 +656,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_ovl_driver_dt_match);
 
 struct platform_driver mtk_disp_ovl_driver = {
 	.probe		= mtk_disp_ovl_probe,
-	.remove		= mtk_disp_ovl_remove,
+	.remove_new	= mtk_disp_ovl_remove,
 	.driver		= {
 		.name	= "mediatek-disp-ovl",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c

@@ -427,7 +427,7 @@ static int ovl_adaptor_comp_init(struct device *dev, struct component_match **ma
 			continue;
 		}
 
-		type = (enum mtk_ovl_adaptor_comp_type)of_id->data;
+		type = (enum mtk_ovl_adaptor_comp_type)(uintptr_t)of_id->data;
 		id = ovl_adaptor_comp_get_id(dev, node, type);
 		if (id < 0) {
 			dev_warn(dev, "Skipping unknown component %pOF\n",

drivers/gpu/drm/mediatek/mtk_disp_rdma.c

@@ -379,13 +379,11 @@ static int mtk_disp_rdma_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_disp_rdma_remove(struct platform_device *pdev)
+static void mtk_disp_rdma_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_disp_rdma_component_ops);
 
 	pm_runtime_disable(&pdev->dev);
-
-	return 0;
 }
 
 static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
@@ -427,7 +425,7 @@ MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
 
 struct platform_driver mtk_disp_rdma_driver = {
 	.probe		= mtk_disp_rdma_probe,
-	.remove		= mtk_disp_rdma_remove,
+	.remove_new	= mtk_disp_rdma_remove,
 	.driver		= {
 		.name	= "mediatek-disp-rdma",
 		.owner	= THIS_MODULE,

drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -1006,7 +1006,6 @@ static int mtk_dpi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_dpi *dpi;
-	struct resource *mem;
 	int ret;
 
 	dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
@@ -1037,49 +1036,34 @@ static int mtk_dpi_probe(struct platform_device *pdev)
 			dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
 		}
 	}
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	dpi->regs = devm_ioremap_resource(dev, mem);
-	if (IS_ERR(dpi->regs)) {
-		ret = PTR_ERR(dpi->regs);
-		dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
-		return ret;
-	}
+	dpi->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dpi->regs))
+		return dev_err_probe(dev, PTR_ERR(dpi->regs),
+				     "Failed to ioremap mem resource\n");
 
 	dpi->engine_clk = devm_clk_get(dev, "engine");
-	if (IS_ERR(dpi->engine_clk)) {
-		ret = PTR_ERR(dpi->engine_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to get engine clock: %d\n", ret);
-
-		return ret;
-	}
+	if (IS_ERR(dpi->engine_clk))
+		return dev_err_probe(dev, PTR_ERR(dpi->engine_clk),
+				     "Failed to get engine clock\n");
 
 	dpi->pixel_clk = devm_clk_get(dev, "pixel");
-	if (IS_ERR(dpi->pixel_clk)) {
-		ret = PTR_ERR(dpi->pixel_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to get pixel clock: %d\n", ret);
-
-		return ret;
-	}
+	if (IS_ERR(dpi->pixel_clk))
+		return dev_err_probe(dev, PTR_ERR(dpi->pixel_clk),
+				     "Failed to get pixel clock\n");
 
 	dpi->tvd_clk = devm_clk_get(dev, "pll");
-	if (IS_ERR(dpi->tvd_clk)) {
-		ret = PTR_ERR(dpi->tvd_clk);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
-
-		return ret;
-	}
+	if (IS_ERR(dpi->tvd_clk))
+		return dev_err_probe(dev, PTR_ERR(dpi->tvd_clk),
+				     "Failed to get tvdpll clock\n");
 
 	dpi->irq = platform_get_irq(pdev, 0);
-	if (dpi->irq <= 0)
-		return -EINVAL;
+	if (dpi->irq < 0)
+		return dpi->irq;
 
-	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
-					  NULL, &dpi->next_bridge);
-	if (ret)
-		return ret;
+	dpi->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
+	if (IS_ERR(dpi->next_bridge))
+		return dev_err_probe(dev, PTR_ERR(dpi->next_bridge),
+				     "Failed to get bridge\n");
 
 	dev_info(dev, "Found bridge node: %pOF\n", dpi->next_bridge->of_node);
 
@@ -1089,57 +1073,37 @@ static int mtk_dpi_probe(struct platform_device *pdev)
 	dpi->bridge.of_node = dev->of_node;
 	dpi->bridge.type = DRM_MODE_CONNECTOR_DPI;
 
-	drm_bridge_add(&dpi->bridge);
+	ret = devm_drm_bridge_add(dev, &dpi->bridge);
+	if (ret)
+		return ret;
 
 	ret = component_add(dev, &mtk_dpi_component_ops);
-	if (ret) {
-		drm_bridge_remove(&dpi->bridge);
-		dev_err(dev, "Failed to add component: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add component.\n");
 
 	return 0;
 }
 
-static int mtk_dpi_remove(struct platform_device *pdev)
+static void mtk_dpi_remove(struct platform_device *pdev)
 {
-	struct mtk_dpi *dpi = platform_get_drvdata(pdev);
-
 	component_del(&pdev->dev, &mtk_dpi_component_ops);
-	drm_bridge_remove(&dpi->bridge);
-
-	return 0;
 }
 
 static const struct of_device_id mtk_dpi_of_ids[] = {
-	{ .compatible = "mediatek,mt2701-dpi",
-	  .data = &mt2701_conf,
-	},
-	{ .compatible = "mediatek,mt8173-dpi",
-	  .data = &mt8173_conf,
-	},
-	{ .compatible = "mediatek,mt8183-dpi",
-	  .data = &mt8183_conf,
-	},
-	{ .compatible = "mediatek,mt8186-dpi",
-	  .data = &mt8186_conf,
-	},
-	{ .compatible = "mediatek,mt8188-dp-intf",
-	  .data = &mt8188_dpintf_conf,
-	},
-	{ .compatible = "mediatek,mt8192-dpi",
-	  .data = &mt8192_conf,
-	},
-	{ .compatible = "mediatek,mt8195-dp-intf",
-	  .data = &mt8195_dpintf_conf,
-	},
-	{ },
+	{ .compatible = "mediatek,mt2701-dpi", .data = &mt2701_conf },
+	{ .compatible = "mediatek,mt8173-dpi", .data = &mt8173_conf },
+	{ .compatible = "mediatek,mt8183-dpi", .data = &mt8183_conf },
+	{ .compatible = "mediatek,mt8186-dpi", .data = &mt8186_conf },
+	{ .compatible = "mediatek,mt8188-dp-intf", .data = &mt8188_dpintf_conf },
+	{ .compatible = "mediatek,mt8192-dpi", .data = &mt8192_conf },
+	{ .compatible = "mediatek,mt8195-dp-intf", .data = &mt8195_dpintf_conf },
+	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
 
 struct platform_driver mtk_dpi_driver = {
 	.probe = mtk_dpi_probe,
-	.remove = mtk_dpi_remove,
+	.remove_new = mtk_dpi_remove,
 	.driver = {
 		.name = "mediatek-dpi",
 		.of_match_table = mtk_dpi_of_ids,

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

@@ -117,10 +117,9 @@ static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *
 	dma_addr_t dma_addr;
 
 	pkt->va_base = kzalloc(size, GFP_KERNEL);
-	if (!pkt->va_base) {
-		kfree(pkt);
+	if (!pkt->va_base)
 		return -ENOMEM;
-	}
+
 	pkt->buf_size = size;
 	pkt->cl = (void *)client;
 
@@ -130,7 +129,6 @@ static int mtk_drm_cmdq_pkt_create(struct cmdq_client *client, struct cmdq_pkt *
 	if (dma_mapping_error(dev, dma_addr)) {
 		dev_err(dev, "dma map failed, size=%u\n", (u32)(u64)size);
 		kfree(pkt->va_base);
-		kfree(pkt);
 		return -ENOMEM;
 	}
 
@@ -146,7 +144,6 @@ static void mtk_drm_cmdq_pkt_destroy(struct cmdq_pkt *pkt)
 	dma_unmap_single(client->chan->mbox->dev, pkt->pa_base, pkt->buf_size,
 			 DMA_TO_DEVICE);
 	kfree(pkt->va_base);
-	kfree(pkt);
 }
 #endif
 

drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c

@@ -563,14 +563,15 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
 	/* Not all drm components have a DTS device node, such as ovl_adaptor,
 	 * which is the drm bring up sub driver
 	 */
-	if (node) {
-		comp_pdev = of_find_device_by_node(node);
-		if (!comp_pdev) {
-			DRM_INFO("Waiting for device %s\n", node->full_name);
-			return -EPROBE_DEFER;
-		}
-		comp->dev = &comp_pdev->dev;
+	if (!node)
+		return 0;
+
+	comp_pdev = of_find_device_by_node(node);
+	if (!comp_pdev) {
+		DRM_INFO("Waiting for device %s\n", node->full_name);
+		return -EPROBE_DEFER;
 	}
+	comp->dev = &comp_pdev->dev;
 
 	if (type == MTK_DISP_AAL ||
 	    type == MTK_DISP_BLS ||
@@ -580,7 +581,6 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
 	    type == MTK_DISP_MERGE ||
 	    type == MTK_DISP_OVL ||
 	    type == MTK_DISP_OVL_2L ||
-	    type == MTK_DISP_OVL_ADAPTOR ||
 	    type == MTK_DISP_PWM ||
 	    type == MTK_DISP_RDMA ||
 	    type == MTK_DPI ||

drivers/gpu/drm/mediatek/mtk_drm_drv.c

@@ -355,7 +355,7 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 	const struct of_device_id *of_id;
 	struct device_node *node;
 	struct device *drm_dev;
-	int cnt = 0;
+	unsigned int cnt = 0;
 	int i, j;
 
 	for_each_child_of_node(phandle->parent, node) {
@@ -376,6 +376,9 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 		all_drm_priv[cnt] = dev_get_drvdata(drm_dev);
 		if (all_drm_priv[cnt] && all_drm_priv[cnt]->mtk_drm_bound)
 			cnt++;
+
+		if (cnt == MAX_CRTC)
+			break;
 	}
 
 	if (drm_priv->data->mmsys_dev_num == cnt) {
@@ -827,7 +830,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
 			continue;
 		}
 
-		comp_type = (enum mtk_ddp_comp_type)of_id->data;
+		comp_type = (enum mtk_ddp_comp_type)(uintptr_t)of_id->data;
 
 		if (comp_type == MTK_DISP_MUTEX) {
 			int id;
@@ -907,7 +910,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_drm_remove(struct platform_device *pdev)
+static void mtk_drm_remove(struct platform_device *pdev)
 {
 	struct mtk_drm_private *private = platform_get_drvdata(pdev);
 	int i;
@@ -917,8 +920,6 @@ static int mtk_drm_remove(struct platform_device *pdev)
 	of_node_put(private->mutex_node);
 	for (i = 0; i < DDP_COMPONENT_DRM_ID_MAX; i++)
 		of_node_put(private->comp_node[i]);
-
-	return 0;
 }
 
 static int mtk_drm_sys_prepare(struct device *dev)
@@ -951,7 +952,7 @@ static const struct dev_pm_ops mtk_drm_pm_ops = {
 
 static struct platform_driver mtk_drm_platform_driver = {
 	.probe	= mtk_drm_probe,
-	.remove	= mtk_drm_remove,
+	.remove_new = mtk_drm_remove,
 	.driver	= {
 		.name	= "mediatek-drm",
 		.pm     = &mtk_drm_pm_ops,

drivers/gpu/drm/mediatek/mtk_drm_gem.c

@@ -247,7 +247,11 @@ int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
 
 	mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
 			       pgprot_writecombine(PAGE_KERNEL));
-
+	if (!mtk_gem->kvaddr) {
+		kfree(sgt);
+		kfree(mtk_gem->pages);
+		return -ENOMEM;
+	}
 out:
 	kfree(sgt);
 	iosys_map_set_vaddr(map, mtk_gem->kvaddr);

drivers/gpu/drm/mediatek/mtk_drm_plane.c

@@ -122,11 +122,7 @@ static int mtk_plane_atomic_async_check(struct drm_plane *plane,
 	if (ret)
 		return ret;
 
-	if (state)
-		crtc_state = drm_atomic_get_existing_crtc_state(state,
-								new_plane_state->crtc);
-	else /* Special case for asynchronous cursor updates. */
-		crtc_state = new_plane_state->crtc->state;
+	crtc_state = drm_atomic_get_existing_crtc_state(state, new_plane_state->crtc);
 
 	return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
 						   DRM_PLANE_NO_SCALING,

drivers/gpu/drm/mediatek/mtk_dsi.c

@@ -1178,14 +1178,12 @@ static int mtk_dsi_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_dsi_remove(struct platform_device *pdev)
+static void mtk_dsi_remove(struct platform_device *pdev)
 {
 	struct mtk_dsi *dsi = platform_get_drvdata(pdev);
 
 	mtk_output_dsi_disable(dsi);
 	mipi_dsi_host_unregister(&dsi->host);
-
-	return 0;
 }
 
 static const struct mtk_dsi_driver_data mt8173_dsi_driver_data = {
@@ -1223,7 +1221,7 @@ MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
 
 struct platform_driver mtk_dsi_driver = {
 	.probe = mtk_dsi_probe,
-	.remove = mtk_dsi_remove,
+	.remove_new = mtk_dsi_remove,
 	.driver = {
 		.name = "mtk-dsi",
 		.of_match_table = mtk_dsi_of_match,

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -1746,13 +1746,12 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_drm_hdmi_remove(struct platform_device *pdev)
+static void mtk_drm_hdmi_remove(struct platform_device *pdev)
 {
 	struct mtk_hdmi *hdmi = platform_get_drvdata(pdev);
 
 	drm_bridge_remove(&hdmi->bridge);
 	mtk_hdmi_clk_disable_audio(hdmi);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -1806,7 +1805,7 @@ MODULE_DEVICE_TABLE(of, mtk_drm_hdmi_of_ids);
 
 static struct platform_driver mtk_hdmi_driver = {
 	.probe = mtk_drm_hdmi_probe,
-	.remove = mtk_drm_hdmi_remove,
+	.remove_new = mtk_drm_hdmi_remove,
 	.driver = {
 		.name = "mediatek-drm-hdmi",
 		.of_match_table = mtk_drm_hdmi_of_ids,

drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c

@@ -324,14 +324,12 @@ static int mtk_hdmi_ddc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_hdmi_ddc_remove(struct platform_device *pdev)
+static void mtk_hdmi_ddc_remove(struct platform_device *pdev)
 {
 	struct mtk_hdmi_ddc *ddc = platform_get_drvdata(pdev);
 
 	i2c_del_adapter(&ddc->adap);
 	clk_disable_unprepare(ddc->clk);
-
-	return 0;
 }
 
 static const struct of_device_id mtk_hdmi_ddc_match[] = {
@@ -342,7 +340,7 @@ MODULE_DEVICE_TABLE(of, mtk_hdmi_ddc_match);
 
 struct platform_driver mtk_hdmi_ddc_driver = {
 	.probe = mtk_hdmi_ddc_probe,
-	.remove = mtk_hdmi_ddc_remove,
+	.remove_new = mtk_hdmi_ddc_remove,
 	.driver = {
 		.name = "mediatek-hdmi-ddc",
 		.of_match_table = mtk_hdmi_ddc_match,

drivers/gpu/drm/mediatek/mtk_mdp_rdma.c

@@ -314,11 +314,10 @@ static int mtk_mdp_rdma_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_mdp_rdma_remove(struct platform_device *pdev)
+static void mtk_mdp_rdma_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_mdp_rdma_component_ops);
 	pm_runtime_disable(&pdev->dev);
-	return 0;
 }
 
 static const struct of_device_id mtk_mdp_rdma_driver_dt_match[] = {
@@ -329,7 +328,7 @@ MODULE_DEVICE_TABLE(of, mtk_mdp_rdma_driver_dt_match);
 
 struct platform_driver mtk_mdp_rdma_driver = {
 	.probe = mtk_mdp_rdma_probe,
-	.remove = mtk_mdp_rdma_remove,
+	.remove_new = mtk_mdp_rdma_remove,
 	.driver = {
 		.name = "mediatek-mdp-rdma",
 		.owner = THIS_MODULE,