Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

7 files changed, 1100 insertions, 0 deletions

diff --git a/drivers/interconnect/mediatek/Kconfig b/drivers/interconnect/mediatek/Kconfig
new file mode 100644
index 000000000..9fd3f2170
--- /dev/null
+++ b/drivers/interconnect/mediatek/Kconfig
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config INTERCONNECT_MTK
+	bool "MediaTek interconnect drivers"
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	help
+	  Support for MediaTek's bus interconnect hardware.
+
+config INTERCONNECT_MTK_DVFSRC_EMI
+	tristate "MediaTek DVFSRC EMI interconnect driver"
+	depends on INTERCONNECT_MTK && MTK_DVFSRC
+	help
+	  This is a driver for the MediaTek External Memory Interface
+	  interconnect on SoCs equipped with the integrated Dynamic
+	  Voltage Frequency Scaling Resource Collector (DVFSRC) MCU
+
+config INTERCONNECT_MTK_MT8183
+	tristate "MediaTek MT8183 interconnect driver"
+	depends on INTERCONNECT_MTK_DVFSRC_EMI
+	help
+	  This is a driver for the MediaTek bus interconnect on MT8183-based
+	  platforms.
+
+config INTERCONNECT_MTK_MT8195
+	tristate "MediaTek MT8195 interconnect driver"
+	depends on INTERCONNECT_MTK_DVFSRC_EMI
+	help
+	  This is a driver for the MediaTek bus interconnect on MT8195-based
+	  platforms.
+
+config INTERCONNECT_MTK_MT8196
+	tristate "MediaTek MT8196 interconnect driver"
+	depends on INTERCONNECT_MTK_DVFSRC_EMI
+	help
+	  This is a driver for the MediaTek bus interconnect on MT8196-based
+	  platforms.
diff --git a/drivers/interconnect/mediatek/Makefile b/drivers/interconnect/mediatek/Makefile
new file mode 100644
index 000000000..6bd656668
--- /dev/null
+++ b/drivers/interconnect/mediatek/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_INTERCONNECT_MTK_DVFSRC_EMI) += icc-emi.o
+obj-$(CONFIG_INTERCONNECT_MTK_MT8183) += mt8183.o
+obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8195.o
+obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8196.o
diff --git a/drivers/interconnect/mediatek/icc-emi.c b/drivers/interconnect/mediatek/icc-emi.c
new file mode 100644
index 000000000..dfa3a9cd9
--- /dev/null
+++ b/drivers/interconnect/mediatek/icc-emi.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek External Memory Interface (EMI) Interconnect driver
+ *
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#include <linux/interconnect.h>
+#include <linux/interconnect-provider.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/overflow.h>
+#include <linux/platform_device.h>
+#include <linux/soc/mediatek/dvfsrc.h>
+
+#include "icc-emi.h"
+
+static int mtk_emi_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw,
+				 u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
+{
+	struct mtk_icc_node *in = node->data;
+
+	if (check_add_overflow(*agg_avg, avg_bw, agg_avg))
+		*agg_avg = U32_MAX;
+
+	*agg_peak = max_t(u32, *agg_peak, peak_bw);
+
+	in->sum_avg = *agg_avg;
+	in->max_peak = *agg_peak;
+
+	return 0;
+}
+
+static int mtk_emi_icc_set(struct icc_node *src, struct icc_node *dst)
+{
+	struct mtk_icc_node *node = dst->data;
+	struct device *dev;
+	int ret;
+
+	if (unlikely(!src->provider))
+		return -EINVAL;
+
+	dev = src->provider->dev->parent;
+
+	switch (node->ep) {
+	case 0:
+		break;
+	case 1:
+		ret = mtk_dvfsrc_send_request(dev, MTK_DVFSRC_CMD_PEAK_BW, node->max_peak);
+		if (ret) {
+			dev_err(dev, "Cannot send peak bw request: %d\n", ret);
+			return ret;
+		}
+
+		ret = mtk_dvfsrc_send_request(dev, MTK_DVFSRC_CMD_BW, node->sum_avg);
+		if (ret) {
+			dev_err(dev, "Cannot send bw request: %d\n", ret);
+			return ret;
+		}
+		break;
+	case 2:
+		ret = mtk_dvfsrc_send_request(dev, MTK_DVFSRC_CMD_HRT_BW, node->sum_avg);
+		if (ret) {
+			dev_err(dev, "Cannot send HRT bw request: %d\n", ret);
+			return ret;
+		}
+		break;
+	default:
+		dev_err(src->provider->dev, "Unknown endpoint %u\n", node->ep);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int mtk_emi_icc_probe(struct platform_device *pdev)
+{
+	const struct mtk_icc_desc *desc;
+	struct device *dev = &pdev->dev;
+	struct icc_node *node;
+	struct icc_onecell_data *data;
+	struct icc_provider *provider;
+	struct mtk_icc_node **mnodes;
+	int i, j, ret;
+
+	desc = of_device_get_match_data(dev);
+	if (!desc)
+		return -EINVAL;
+
+	mnodes = desc->nodes;
+
+	provider = devm_kzalloc(dev, sizeof(*provider), GFP_KERNEL);
+	if (!provider)
+		return -ENOMEM;
+
+	data = devm_kzalloc(dev, struct_size(data, nodes, desc->num_nodes), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	provider->dev = dev;
+	provider->set = mtk_emi_icc_set;
+	provider->aggregate = mtk_emi_icc_aggregate;
+	provider->xlate = of_icc_xlate_onecell;
+	INIT_LIST_HEAD(&provider->nodes);
+	provider->data = data;
+
+	for (i = 0; i < desc->num_nodes; i++) {
+		if (!mnodes[i])
+			continue;
+
+		node = icc_node_create(mnodes[i]->id);
+		if (IS_ERR(node)) {
+			ret = PTR_ERR(node);
+			goto err;
+		}
+
+		node->name = mnodes[i]->name;
+		node->data = mnodes[i];
+		icc_node_add(node, provider);
+
+		for (j = 0; j < mnodes[i]->num_links; j++)
+			icc_link_create(node, mnodes[i]->links[j]);
+
+		data->nodes[i] = node;
+	}
+	data->num_nodes = desc->num_nodes;
+
+	ret = icc_provider_register(provider);
+	if (ret)
+		goto err;
+
+	platform_set_drvdata(pdev, provider);
+
+	return 0;
+err:
+	icc_nodes_remove(provider);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(mtk_emi_icc_probe);
+
+void mtk_emi_icc_remove(struct platform_device *pdev)
+{
+	struct icc_provider *provider = platform_get_drvdata(pdev);
+
+	icc_provider_deregister(provider);
+	icc_nodes_remove(provider);
+}
+EXPORT_SYMBOL_GPL(mtk_emi_icc_remove);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
+MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek External Memory Interface interconnect driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/interconnect/mediatek/icc-emi.h b/drivers/interconnect/mediatek/icc-emi.h
new file mode 100644
index 000000000..9512a50db
--- /dev/null
+++ b/drivers/interconnect/mediatek/icc-emi.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#ifndef __DRIVERS_INTERCONNECT_MEDIATEK_ICC_EMI_H
+#define __DRIVERS_INTERCONNECT_MEDIATEK_ICC_EMI_H
+
+/**
+ * struct mtk_icc_node - Mediatek EMI Interconnect Node
+ * @name:      The interconnect node name which is shown in debugfs
+ * @ep:        Type of this endpoint
+ * @id:        Unique node identifier
+ * @sum_avg:   Current sum aggregate value of all average bw requests in kBps
+ * @max_peak:  Current max aggregate value of all peak bw requests in kBps
+ * @num_links: The total number of @links
+ * @links:     Array of @id linked to this node
+ */
+struct mtk_icc_node {
+	unsigned char *name;
+	int ep;
+	u16 id;
+	u64 sum_avg;
+	u64 max_peak;
+
+	u16 num_links;
+	u16 links[] __counted_by(num_links);
+};
+
+struct mtk_icc_desc {
+	struct mtk_icc_node **nodes;
+	size_t num_nodes;
+};
+
+int mtk_emi_icc_probe(struct platform_device *pdev);
+void mtk_emi_icc_remove(struct platform_device *pdev);
+
+#endif /* __DRIVERS_INTERCONNECT_MEDIATEK_ICC_EMI_H */
diff --git a/drivers/interconnect/mediatek/mt8183.c b/drivers/interconnect/mediatek/mt8183.c
new file mode 100644
index 000000000..ed607a8b8
--- /dev/null
+++ b/drivers/interconnect/mediatek/mt8183.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#include <linux/device.h>
+#include <linux/interconnect.h>
+#include <linux/interconnect-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/interconnect/mediatek,mt8183.h>
+
+#include "icc-emi.h"
+
+static struct mtk_icc_node ddr_emi = {
+	.name = "ddr-emi",
+	.id = SLAVE_DDR_EMI,
+	.ep = 1,
+};
+
+static struct mtk_icc_node mcusys = {
+	.name = "mcusys",
+	.id = MASTER_MCUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node gpu = {
+	.name = "gpu",
+	.id = MASTER_MFG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mmsys = {
+	.name = "mmsys",
+	.id = MASTER_MMSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mm_vpu = {
+	.name = "mm-vpu",
+	.id = MASTER_MM_VPU,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_disp = {
+	.name = "mm-disp",
+	.id = MASTER_MM_DISP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_vdec = {
+	.name = "mm-vdec",
+	.id = MASTER_MM_VDEC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_venc = {
+	.name = "mm-venc",
+	.id = MASTER_MM_VENC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_cam = {
+	.name = "mm-cam",
+	.id = MASTER_MM_CAM,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_img = {
+	.name = "mm-img",
+	.id = MASTER_MM_IMG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_mdp = {
+	.name = "mm-mdp",
+	.id = MASTER_MM_MDP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node *mt8183_emi_icc_nodes[] = {
+	[SLAVE_DDR_EMI] = &ddr_emi,
+	[MASTER_MCUSYS] = &mcusys,
+	[MASTER_MFG] = &gpu,
+	[MASTER_MMSYS] = &mmsys,
+	[MASTER_MM_VPU] = &mm_vpu,
+	[MASTER_MM_DISP] = &mm_disp,
+	[MASTER_MM_VDEC] = &mm_vdec,
+	[MASTER_MM_VENC] = &mm_venc,
+	[MASTER_MM_CAM] = &mm_cam,
+	[MASTER_MM_IMG] = &mm_img,
+	[MASTER_MM_MDP] = &mm_mdp
+};
+
+static const struct mtk_icc_desc mt8183_emi_icc = {
+	.nodes = mt8183_emi_icc_nodes,
+	.num_nodes = ARRAY_SIZE(mt8183_emi_icc_nodes),
+};
+
+static const struct of_device_id mtk_mt8183_emi_icc_of_match[] = {
+	{ .compatible = "mediatek,mt8183-emi", .data = &mt8183_emi_icc },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mtk_mt8183_emi_icc_of_match);
+
+static struct platform_driver mtk_emi_icc_mt8183_driver = {
+	.driver = {
+		.name = "emi-icc-mt8183",
+		.of_match_table = mtk_mt8183_emi_icc_of_match,
+		.sync_state = icc_sync_state,
+	},
+	.probe = mtk_emi_icc_probe,
+	.remove = mtk_emi_icc_remove,
+
+};
+module_platform_driver(mtk_emi_icc_mt8183_driver);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
+MODULE_DESCRIPTION("MediaTek MT8183 EMI ICC driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/interconnect/mediatek/mt8195.c b/drivers/interconnect/mediatek/mt8195.c
new file mode 100644
index 000000000..0f0767639
--- /dev/null
+++ b/drivers/interconnect/mediatek/mt8195.c
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Copyright (c) 2024 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#include <linux/device.h>
+#include <linux/interconnect.h>
+#include <linux/interconnect-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/interconnect/mediatek,mt8195.h>
+
+#include "icc-emi.h"
+
+static struct mtk_icc_node ddr_emi = {
+	.name = "ddr-emi",
+	.id = SLAVE_DDR_EMI,
+	.ep = 1,
+};
+
+static struct mtk_icc_node mcusys = {
+	.name = "mcusys",
+	.id = MASTER_MCUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node gpu = {
+	.name = "gpu",
+	.id = MASTER_GPUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mmsys = {
+	.name = "mmsys",
+	.id = MASTER_MMSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mm_vpu = {
+	.name = "mm-vpu",
+	.id = MASTER_MM_VPU,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_disp = {
+	.name = "mm-disp",
+	.id = MASTER_MM_DISP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_vdec = {
+	.name = "mm-vdec",
+	.id = MASTER_MM_VDEC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_venc = {
+	.name = "mm-venc",
+	.id = MASTER_MM_VENC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_cam = {
+	.name = "mm-cam",
+	.id = MASTER_MM_CAM,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_img = {
+	.name = "mm-img",
+	.id = MASTER_MM_IMG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_mdp = {
+	.name = "mm-mdp",
+	.id = MASTER_MM_MDP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node vpusys = {
+	.name = "vpusys",
+	.id = MASTER_VPUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node vpu_port0 = {
+	.name = "vpu-port0",
+	.id = MASTER_VPU_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_VPUSYS }
+};
+
+static struct mtk_icc_node vpu_port1 = {
+	.name = "vpu-port1",
+	.id = MASTER_VPU_1,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_VPUSYS }
+};
+
+static struct mtk_icc_node mdlasys = {
+	.name = "mdlasys",
+	.id = MASTER_MDLASYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mdla_port0 = {
+	.name = "mdla-port0",
+	.id = MASTER_MDLA_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MDLASYS }
+};
+
+static struct mtk_icc_node ufs = {
+	.name = "ufs",
+	.id = MASTER_UFS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node pcie0 = {
+	.name = "pcie0",
+	.id = MASTER_PCIE_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node pcie1 = {
+	.name = "pcie1",
+	.id = MASTER_PCIE_1,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node usb = {
+	.name = "usb",
+	.id = MASTER_USB,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node wifi = {
+	.name = "wifi",
+	.id = MASTER_WIFI,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node bt = {
+	.name = "bt",
+	.id = MASTER_BT,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node netsys = {
+	.name = "netsys",
+	.id = MASTER_NETSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node dbgif = {
+	.name = "dbgif",
+	.id = MASTER_DBGIF,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node hrt_ddr_emi = {
+	.name = "hrt-ddr-emi",
+	.id = SLAVE_HRT_DDR_EMI,
+	.ep = 2,
+};
+
+static struct mtk_icc_node hrt_mmsys = {
+	.name = "hrt-mmsys",
+	.id = MASTER_HRT_MMSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_HRT_DDR_EMI }
+};
+
+static struct mtk_icc_node hrt_mm_disp = {
+	.name = "hrt-mm-disp",
+	.id = MASTER_HRT_MM_DISP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_vdec = {
+	.name = "hrt-mm-vdec",
+	.id = MASTER_HRT_MM_VDEC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_venc = {
+	.name = "hrt-mm-venc",
+	.id = MASTER_HRT_MM_VENC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_cam = {
+	.name = "hrt-mm-cam",
+	.id = MASTER_HRT_MM_CAM,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_img = {
+	.name = "hrt-mm-img",
+	.id = MASTER_HRT_MM_IMG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_mdp = {
+	.name = "hrt-mm-mdp",
+	.id = MASTER_HRT_MM_MDP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_dbgif = {
+	.name = "hrt-dbgif",
+	.id = MASTER_HRT_DBGIF,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_HRT_DDR_EMI }
+};
+
+static struct mtk_icc_node *mt8195_emi_icc_nodes[] = {
+	[SLAVE_DDR_EMI] = &ddr_emi,
+	[MASTER_MCUSYS] = &mcusys,
+	[MASTER_GPUSYS] = &gpu,
+	[MASTER_MMSYS] = &mmsys,
+	[MASTER_MM_VPU] = &mm_vpu,
+	[MASTER_MM_DISP] = &mm_disp,
+	[MASTER_MM_VDEC] = &mm_vdec,
+	[MASTER_MM_VENC] = &mm_venc,
+	[MASTER_MM_CAM] = &mm_cam,
+	[MASTER_MM_IMG] = &mm_img,
+	[MASTER_MM_MDP] = &mm_mdp,
+	[MASTER_VPUSYS] = &vpusys,
+	[MASTER_VPU_0] = &vpu_port0,
+	[MASTER_VPU_1] = &vpu_port1,
+	[MASTER_MDLASYS] = &mdlasys,
+	[MASTER_MDLA_0] = &mdla_port0,
+	[MASTER_UFS] = &ufs,
+	[MASTER_PCIE_0] = &pcie0,
+	[MASTER_PCIE_1] = &pcie1,
+	[MASTER_USB] = &usb,
+	[MASTER_WIFI] = &wifi,
+	[MASTER_BT] = &bt,
+	[MASTER_NETSYS] = &netsys,
+	[MASTER_DBGIF] = &dbgif,
+	[SLAVE_HRT_DDR_EMI] = &hrt_ddr_emi,
+	[MASTER_HRT_MMSYS] = &hrt_mmsys,
+	[MASTER_HRT_MM_DISP] = &hrt_mm_disp,
+	[MASTER_HRT_MM_VDEC] = &hrt_mm_vdec,
+	[MASTER_HRT_MM_VENC] = &hrt_mm_venc,
+	[MASTER_HRT_MM_CAM] = &hrt_mm_cam,
+	[MASTER_HRT_MM_IMG] = &hrt_mm_img,
+	[MASTER_HRT_MM_MDP] = &hrt_mm_mdp,
+	[MASTER_HRT_DBGIF] = &hrt_dbgif
+};
+
+static struct mtk_icc_desc mt8195_emi_icc = {
+	.nodes = mt8195_emi_icc_nodes,
+	.num_nodes = ARRAY_SIZE(mt8195_emi_icc_nodes),
+};
+
+static const struct of_device_id mtk_mt8195_emi_icc_of_match[] = {
+	{ .compatible = "mediatek,mt8195-emi", .data = &mt8195_emi_icc },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mtk_mt8195_emi_icc_of_match);
+
+static struct platform_driver mtk_emi_icc_mt8195_driver = {
+	.driver = {
+		.name = "emi-icc-mt8195",
+		.of_match_table = mtk_mt8195_emi_icc_of_match,
+		.sync_state = icc_sync_state,
+	},
+	.probe = mtk_emi_icc_probe,
+	.remove = mtk_emi_icc_remove,
+
+};
+module_platform_driver(mtk_emi_icc_mt8195_driver);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
+MODULE_DESCRIPTION("MediaTek MT8195 EMI ICC driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/interconnect/mediatek/mt8196.c b/drivers/interconnect/mediatek/mt8196.c
new file mode 100644
index 000000000..df5a975f0
--- /dev/null
+++ b/drivers/interconnect/mediatek/mt8196.c
@@ -0,0 +1,382 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Collabora Ltd.
+ *                    AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+ */
+
+#include <linux/device.h>
+#include <linux/interconnect.h>
+#include <linux/interconnect-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/interconnect/mediatek,mt8196.h>
+
+#include "icc-emi.h"
+
+static struct mtk_icc_node ddr_emi = {
+	.name = "ddr-emi",
+	.id = SLAVE_DDR_EMI,
+	.ep = 1,
+};
+
+static struct mtk_icc_node mcusys = {
+	.name = "mcusys",
+	.id = MASTER_MCUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mcu_port0 = {
+	.name = "mcu-port0",
+	.id = MASTER_MCU_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mcu_port1 = {
+	.name = "mcu-port1",
+	.id = MASTER_MCU_1,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mcu_port2 = {
+	.name = "mcu-port2",
+	.id = MASTER_MCU_2,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mcu_port3 = {
+	.name = "mcu-port3",
+	.id = MASTER_MCU_3,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mcu_port4 = {
+	.name = "mcu-port4",
+	.id = MASTER_MCU_4,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node gpu = {
+	.name = "gpu",
+	.id = MASTER_GPUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mmsys = {
+	.name = "mmsys",
+	.id = MASTER_MMSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mm_vpu = {
+	.name = "mm-vpu",
+	.id = MASTER_MM_VPU,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_disp = {
+	.name = "mm-disp",
+	.id = MASTER_MM_DISP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_vdec = {
+	.name = "mm-vdec",
+	.id = MASTER_MM_VDEC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_venc = {
+	.name = "mm-venc",
+	.id = MASTER_MM_VENC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_cam = {
+	.name = "mm-cam",
+	.id = MASTER_MM_CAM,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_img = {
+	.name = "mm-img",
+	.id = MASTER_MM_IMG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node mm_mdp = {
+	.name = "mm-mdp",
+	.id = MASTER_MM_MDP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MMSYS }
+};
+
+static struct mtk_icc_node vpusys = {
+	.name = "vpusys",
+	.id = MASTER_VPUSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node vpu_port0 = {
+	.name = "vpu-port0",
+	.id = MASTER_VPU_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_VPUSYS }
+};
+
+static struct mtk_icc_node vpu_port1 = {
+	.name = "vpu-port1",
+	.id = MASTER_VPU_1,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_VPUSYS }
+};
+
+static struct mtk_icc_node mdlasys = {
+	.name = "mdlasys",
+	.id = MASTER_MDLASYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node mdla_port0 = {
+	.name = "mdla-port0",
+	.id = MASTER_MDLA_0,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_MDLASYS }
+};
+
+static struct mtk_icc_node ufs = {
+	.name = "ufs",
+	.id = MASTER_UFS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node pcie = {
+	.name = "pcie",
+	.id = MASTER_PCIE,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node usb = {
+	.name = "usb",
+	.id = MASTER_USB,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node wifi = {
+	.name = "wifi",
+	.id = MASTER_WIFI,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node bt = {
+	.name = "bt",
+	.id = MASTER_BT,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node netsys = {
+	.name = "netsys",
+	.id = MASTER_NETSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node dbgif = {
+	.name = "dbgif",
+	.id = MASTER_DBGIF,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_DDR_EMI }
+};
+
+static struct mtk_icc_node hrt_ddr_emi = {
+	.name = "hrt-ddr-emi",
+	.id = SLAVE_HRT_DDR_EMI,
+	.ep = 2,
+};
+
+static struct mtk_icc_node hrt_mmsys = {
+	.name = "hrt-mmsys",
+	.id = MASTER_HRT_MMSYS,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_HRT_DDR_EMI }
+};
+
+static struct mtk_icc_node hrt_mm_disp = {
+	.name = "hrt-mm-disp",
+	.id = MASTER_HRT_MM_DISP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_vdec = {
+	.name = "hrt-mm-vdec",
+	.id = MASTER_HRT_MM_VDEC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_venc = {
+	.name = "hrt-mm-venc",
+	.id = MASTER_HRT_MM_VENC,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_cam = {
+	.name = "hrt-mm-cam",
+	.id = MASTER_HRT_MM_CAM,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_img = {
+	.name = "hrt-mm-img",
+	.id = MASTER_HRT_MM_IMG,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_mm_mdp = {
+	.name = "hrt-mm-mdp",
+	.id = MASTER_HRT_MM_MDP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { MASTER_HRT_MMSYS }
+};
+
+static struct mtk_icc_node hrt_adsp = {
+	.name = "hrt-adsp",
+	.id = MASTER_HRT_ADSP,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_HRT_DDR_EMI }
+};
+
+static struct mtk_icc_node hrt_dbgif = {
+	.name = "hrt-dbgif",
+	.id = MASTER_HRT_DBGIF,
+	.ep = 0,
+	.num_links = 1,
+	.links = { SLAVE_HRT_DDR_EMI }
+};
+
+static struct mtk_icc_node *mt8196_emi_icc_nodes[] = {
+	[SLAVE_DDR_EMI] = &ddr_emi,
+	[MASTER_MCUSYS] = &mcusys,
+	[MASTER_MCU_0] = &mcu_port0,
+	[MASTER_MCU_1] = &mcu_port1,
+	[MASTER_MCU_2] = &mcu_port2,
+	[MASTER_MCU_3] = &mcu_port3,
+	[MASTER_MCU_4] = &mcu_port4,
+	[MASTER_GPUSYS] = &gpu,
+	[MASTER_MMSYS] = &mmsys,
+	[MASTER_MM_VPU] = &mm_vpu,
+	[MASTER_MM_DISP] = &mm_disp,
+	[MASTER_MM_VDEC] = &mm_vdec,
+	[MASTER_MM_VENC] = &mm_venc,
+	[MASTER_MM_CAM] = &mm_cam,
+	[MASTER_MM_IMG] = &mm_img,
+	[MASTER_MM_MDP] = &mm_mdp,
+	[MASTER_VPUSYS] = &vpusys,
+	[MASTER_VPU_0] = &vpu_port0,
+	[MASTER_VPU_1] = &vpu_port1,
+	[MASTER_MDLASYS] = &mdlasys,
+	[MASTER_MDLA_0] = &mdla_port0,
+	[MASTER_UFS] = &ufs,
+	[MASTER_PCIE] = &pcie,
+	[MASTER_USB] = &usb,
+	[MASTER_WIFI] = &wifi,
+	[MASTER_BT] = &bt,
+	[MASTER_NETSYS] = &netsys,
+	[MASTER_DBGIF] = &dbgif,
+	[SLAVE_HRT_DDR_EMI] = &hrt_ddr_emi,
+	[MASTER_HRT_MMSYS] = &hrt_mmsys,
+	[MASTER_HRT_MM_DISP] = &hrt_mm_disp,
+	[MASTER_HRT_MM_VDEC] = &hrt_mm_vdec,
+	[MASTER_HRT_MM_VENC] = &hrt_mm_venc,
+	[MASTER_HRT_MM_CAM] = &hrt_mm_cam,
+	[MASTER_HRT_MM_IMG] = &hrt_mm_img,
+	[MASTER_HRT_MM_MDP] = &hrt_mm_mdp,
+	[MASTER_HRT_ADSP] = &hrt_adsp,
+	[MASTER_HRT_DBGIF] = &hrt_dbgif
+};
+
+static struct mtk_icc_desc mt8196_emi_icc = {
+	.nodes = mt8196_emi_icc_nodes,
+	.num_nodes = ARRAY_SIZE(mt8196_emi_icc_nodes),
+};
+
+static const struct of_device_id mtk_mt8196_emi_icc_of_match[] = {
+	{ .compatible = "mediatek,mt8196-emi", .data = &mt8196_emi_icc },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mtk_mt8196_emi_icc_of_match);
+
+static struct platform_driver mtk_emi_icc_mt8196_driver = {
+	.driver = {
+		.name = "emi-icc-mt8196",
+		.of_match_table = mtk_mt8196_emi_icc_of_match,
+		.sync_state = icc_sync_state,
+	},
+	.probe = mtk_emi_icc_probe,
+	.remove = mtk_emi_icc_remove,
+
+};
+module_platform_driver(mtk_emi_icc_mt8196_driver);
+
+MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
+MODULE_DESCRIPTION("MediaTek MT8196 EMI ICC driver");
+MODULE_LICENSE("GPL");