[PATCH v5, 0/7] support mt8195 decoder

[PATCH v5, 0/7] support mt8195 decoder

[Yunfei Dong]

Firstly, add mt8195 soc lat hardware and compatible, then add documents.
For vp8 only support MM21 mode, H264/vp9 support MT21C, need to separate
them. Lastly, enable H264 inner racing mode to reduce hardware latency.

Patch 1~4 add mt8195 soc lat hardware and compatible, then add documents.
Patch 5 using different format for different codecs.
Patch 6 prevent kernel crash when scp reboot.
Patch 7 enable H264 inner racing mode to reduce hardware latency.
---
This patch depends on "add h264 decoder driver for mt8186"[1]

[1]  https://patchwork.kernel.org/project/linux-mediatek/cover/20220507013625.29020-1-yunfei.dong@mediatek.com/
---
changed with v4:
- fix sparse and smatch check fail for patch 7.
changed with v3:
- rebase driver to the latest media_stage.
changed with v2:
- add detail explanation for lat soc hardware for patch 1.
changed with v1:
- separate "Init VP9 stateless decode params" patch and remove it to another one.
- add reviewed-by in patch v3/v4/v6
---
Yunfei Dong (7):
  dt-bindings: media: mediatek: vcodec: Adds decoder dt-bindings for lat
    soc
  media: mediatek: vcodec: Add to support lat soc hardware
  dt-bindings: media: mediatek: vcodec: Adds decoder dt-bindings for
    mt8195
  media: mediatek: vcodec: Adds compatible for mt8195
  media: mediatek: vcodec: Different codec using different capture
    format
  media: mediatek: vcodec: prevent kernel crash when scp ipi timeout
  media: mediatek: vcodec: Add to support H264 inner racing mode

 .../media/mediatek,vcodec-subdev-decoder.yaml | 52 +++++++++++++------
 .../platform/mediatek/vcodec/mtk_vcodec_dec.c | 41 +++++++++++++++
 .../mediatek/vcodec/mtk_vcodec_dec_drv.c      |  8 +++
 .../mediatek/vcodec/mtk_vcodec_dec_hw.c       | 12 +++--
 .../mediatek/vcodec/mtk_vcodec_dec_hw.h       |  2 +
 .../mediatek/vcodec/mtk_vcodec_dec_pm.c       | 50 ++++++++++++++++++
 .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 11 ++++
 .../vcodec/vdec/vdec_h264_req_multi_if.c      | 29 ++++++++---
 .../platform/mediatek/vcodec/vdec_vpu_if.c    |  5 ++
 9 files changed, 183 insertions(+), 27 deletions(-)

-- 
2.18.0

[PATCH v5, 1/7] dt-bindings: media: mediatek: vcodec: Adds decoder dt-bindings for lat soc

[Yunfei Dong]

Adds decoder dt-bindings for compatible "mediatek,mtk-vcodec-lat-soc".

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../media/mediatek,vcodec-subdev-decoder.yaml | 51 +++++++++++++------
 1 file changed, 35 insertions(+), 16 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
index 6415c9f29130..6854e7f2ce9f 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
@@ -17,20 +17,20 @@ description: |
 
   About the Decoder Hardware Block Diagram, please check below:
 
-    +---------------------------------+------------------------------------+
-    |                                 |                                    |
-    | input -> lat HW -> lat buffer --|--> lat buffer -> core HW -> output |
-    |            ||                   |                     ||             |
-    +------------||-------------------+---------------------||-------------+
-              lat workqueue           |              core workqueue     <parent>
-    -------------||-----------------------------------------||------------------
-                 ||                                         ||          <child>
-                 \/ <----------------HW index-------------->\/
-           +------------------------------------------------------+
-           |                    enable/disable                    |
-           |           clk     power    irq    iommu              |
-           |                 (lat/lat soc/core0/core1)            |
-           +------------------------------------------------------+
+    +------------------------------------------------+-------------------------------------+
+    |                                                |                                     |
+    |  input -> lat soc HW -> lat HW -> lat buffer --|--> lat buffer -> core HW -> output  |
+    |            ||             ||                   |                     ||              |
+    +------------||-------------||-------------------+---------------------||--------------+
+                 ||     lat     ||                   |               core workqueue  <parent>
+    -------------||-------------||-------------------|---------------------||---------------
+                 ||<------------||----------------HW index---------------->||        <child>
+                 \/             \/                                         \/
+               +-------------------------------------------------------------+
+               |                          enable/disable                     |
+               |                 clk     power    irq    iommu               |
+               |                   (lat/lat soc/core0/core1)                 |
+               +-------------------------------------------------------------+
 
   As above, there are parent and child devices, child mean each hardware. The child device
   controls the information of each hardware independent which include clk/power/irq.
@@ -45,6 +45,13 @@ description: |
   For the smi common may not the same for each hardware, can't combine all hardware in one node,
   or leading to iommu fault when access dram data.
 
+  Lat soc is a hardware which is related with some larb(local arbiter) ports. For mt8195
+  platform, there are some ports like RDMA, UFO in lat soc larb, need to enable its power and
+  clock when lat start to work, don't have interrupt.
+
+  mt8195: lat soc HW + lat HW + core HW
+  mt8192: lat HW + core HW
+
 properties:
   compatible:
     enum:
@@ -88,7 +95,9 @@ patternProperties:
 
     properties:
       compatible:
-        const: mediatek,mtk-vcodec-lat
+        enum:
+          - mediatek,mtk-vcodec-lat
+          - mediatek,mtk-vcodec-lat-soc
 
       reg:
         maxItems: 1
@@ -126,7 +135,6 @@ patternProperties:
     required:
       - compatible
       - reg
-      - interrupts
       - iommus
       - clocks
       - clock-names
@@ -197,6 +205,17 @@ required:
   - dma-ranges
   - ranges
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - mediatek,mtk-vcodec-lat
+
+then:
+  required:
+    - interrupts
+
 additionalProperties: false
 
 examples:
-- 
2.18.0

[PATCH v5, 2/7] media: mediatek: vcodec: Add to support lat soc hardware

[Yunfei Dong]

Add lat soc compatible and to support lat soc power/clk helper.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
 .../platform/mediatek/vcodec/mtk_vcodec_dec_hw.c | 12 +++++++++---
 .../platform/mediatek/vcodec/mtk_vcodec_dec_hw.h |  2 ++
 .../platform/mediatek/vcodec/mtk_vcodec_dec_pm.c | 16 ++++++++++++++++
 .../platform/mediatek/vcodec/mtk_vcodec_drv.h    |  1 +
 4 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
index 14bed2bd4283..376db0e433d7 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.c
@@ -28,6 +28,10 @@ static const struct of_device_id mtk_vdec_hw_match[] = {
 		.compatible = "mediatek,mtk-vcodec-core",
 		.data = (void *)MTK_VDEC_CORE,
 	},
+	{
+		.compatible = "mediatek,mtk-vcodec-lat-soc",
+		.data = (void *)MTK_VDEC_LAT_SOC,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match);
@@ -166,9 +170,11 @@ static int mtk_vdec_hw_probe(struct platform_device *pdev)
 	subdev_dev->reg_base[VDEC_HW_SYS] = main_dev->reg_base[VDEC_HW_SYS];
 	set_bit(subdev_dev->hw_idx, main_dev->subdev_bitmap);
 
-	ret = mtk_vdec_hw_init_irq(subdev_dev);
-	if (ret)
-		goto err;
+	if (IS_SUPPORT_VDEC_HW_IRQ(hw_idx)) {
+		ret = mtk_vdec_hw_init_irq(subdev_dev);
+		if (ret)
+			goto err;
+	}
 
 	subdev_dev->reg_base[VDEC_HW_MISC] =
 		devm_platform_ioremap_resource(pdev, 0);
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h
index a63e4b1b81c3..b8938c6c3e72 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_hw.h
@@ -17,6 +17,8 @@
 #define VDEC_IRQ_CLR 0x10
 #define VDEC_IRQ_CFG_REG 0xa4
 
+#define IS_SUPPORT_VDEC_HW_IRQ(hw_idx) (hw_idx != MTK_VDEC_LAT_SOC)
+
 /**
  * enum mtk_vdec_hw_reg_idx - subdev hardware register base index
  * @VDEC_HW_SYS : vdec soc register index
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
index 0fb7e5ba635b..d69faa463d04 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
@@ -174,6 +174,14 @@ static void mtk_vcodec_dec_child_dev_on(struct mtk_vcodec_dev *vdec_dev,
 		mtk_vcodec_dec_pw_on(pm);
 		mtk_vcodec_dec_clock_on(pm);
 	}
+
+	if (hw_idx == MTK_VDEC_LAT0) {
+		pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
+		if (pm) {
+			mtk_vcodec_dec_pw_on(pm);
+			mtk_vcodec_dec_clock_on(pm);
+		}
+	}
 }
 
 static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dev *vdec_dev,
@@ -186,6 +194,14 @@ static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dev *vdec_dev,
 		mtk_vcodec_dec_clock_off(pm);
 		mtk_vcodec_dec_pw_off(pm);
 	}
+
+	if (hw_idx == MTK_VDEC_LAT0) {
+		pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
+		if (pm) {
+			mtk_vcodec_dec_clock_off(pm);
+			mtk_vcodec_dec_pw_off(pm);
+		}
+	}
 }
 
 void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_ctx *ctx, int hw_idx)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
index a29041a0b7e0..0e3db8ccb398 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
@@ -104,6 +104,7 @@ enum mtk_vdec_hw_id {
 	MTK_VDEC_CORE,
 	MTK_VDEC_LAT0,
 	MTK_VDEC_LAT1,
+	MTK_VDEC_LAT_SOC,
 	MTK_VDEC_HW_MAX,
 };
 
-- 
2.18.0

[PATCH v5, 3/7] dt-bindings: media: mediatek: vcodec: Adds decoder dt-bindings for mt8195

[Yunfei Dong]

Adds decoder dt-bindings for mt8195.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: Macpaul Lin <macpaul.lin@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/media/mediatek,vcodec-subdev-decoder.yaml           | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
index 6854e7f2ce9f..ca6a00be815a 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
@@ -57,6 +57,7 @@ properties:
     enum:
       - mediatek,mt8192-vcodec-dec
       - mediatek,mt8186-vcodec-dec
+      - mediatek,mt8195-vcodec-dec
 
   reg:
     maxItems: 1
-- 
2.18.0

[PATCH v5, 4/7] media: mediatek: vcodec: Adds compatible for mt8195

[Yunfei Dong]

Adds compatible for mt8195 platform.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: Macpaul Lin <macpaul.lin@mediatek.com>
---
 drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
index b417a6ab2176..b9b99770c5cb 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
@@ -462,6 +462,10 @@ static const struct of_device_id mtk_vcodec_match[] = {
 		.compatible = "mediatek,mt8186-vcodec-dec",
 		.data = &mtk_vdec_single_core_pdata,
 	},
+	{
+		.compatible = "mediatek,mt8195-vcodec-dec",
+		.data = &mtk_lat_sig_core_pdata,
+	},
 	{},
 };
 
-- 
2.18.0

[PATCH v5, 5/7] media: mediatek: vcodec: Different codec using different capture format

[Yunfei Dong]

Vp8 need to use MM21, but vp9 and h264 need to use HyFbc mode
for mt8195. Vp8/vp9/h264 use the same MM21 format for mt8192.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
 .../platform/mediatek/vcodec/mtk_vcodec_dec.c | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
index 3859e4c651c6..d0f2dedcc911 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
@@ -35,6 +35,44 @@ mtk_vdec_find_format(struct v4l2_format *f,
 	return NULL;
 }
 
+static bool mtk_vdec_get_cap_fmt(struct mtk_vcodec_ctx *ctx, int format_index)
+{
+	const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;
+	const struct mtk_video_fmt *fmt;
+	struct mtk_q_data *q_data;
+	int num_frame_count = 0, i;
+	bool ret = true;
+
+	for (i = 0; i < *dec_pdata->num_formats; i++) {
+		if (dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME)
+			continue;
+
+		num_frame_count++;
+	}
+
+	if (num_frame_count == 1)
+		return true;
+
+	fmt = &dec_pdata->vdec_formats[format_index];
+	q_data = &ctx->q_data[MTK_Q_DATA_SRC];
+	switch (q_data->fmt->fourcc) {
+	case V4L2_PIX_FMT_VP8_FRAME:
+		if (fmt->fourcc == V4L2_PIX_FMT_MM21)
+			ret = true;
+		break;
+	case V4L2_PIX_FMT_H264_SLICE:
+	case V4L2_PIX_FMT_VP9_FRAME:
+		if (fmt->fourcc == V4L2_PIX_FMT_MM21)
+			ret = false;
+		break;
+	default:
+		ret = true;
+		break;
+	};
+
+	return ret;
+}
+
 static struct mtk_q_data *mtk_vdec_get_q_data(struct mtk_vcodec_ctx *ctx,
 					      enum v4l2_buf_type type)
 {
@@ -577,6 +615,9 @@ static int vidioc_enum_fmt(struct v4l2_fmtdesc *f, void *priv,
 		    dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME)
 			continue;
 
+		if (!output_queue && !mtk_vdec_get_cap_fmt(ctx, i))
+			continue;
+
 		if (j == f->index)
 			break;
 		++j;
-- 
2.18.0

[PATCH v5, 6/7] media: mediatek: vcodec: prevent kernel crash when scp ipi timeout

[Yunfei Dong]

When SCP timeout during playing video, kernel crashes with following
message. It's caused by accessing NULL pointer in vpu_dec_ipi_handler.
This patch doesn't solve the root cause of NULL pointer, but merely
prevent kernel crashed when encounter the NULL pointer.

After applied this patch, kernel keeps alive, only the video player turns
to green screen.

[67242.065474] pc : vpu_dec_ipi_handler+0xa0/0xb20 [mtk_vcodec_dec]
[67242.065485] [MTK_V4L2] level=0 fops_vcodec_open(),334:
18000000.vcodec_dec decoder [135]
[67242.065523] lr : scp_ipi_handler+0x11c/0x244 [mtk_scp]
[67242.065540] sp : ffffffbb4207fb10
[67242.065557] x29: ffffffbb4207fb30 x28: ffffffd00a1d5000
[67242.065592] x27: 1ffffffa0143aa24 x26: 0000000000000000
[67242.065625] x25: dfffffd000000000 x24: ffffffd0168bfdb0
[67242.065659] x23: 1ffffff76840ff74 x22: ffffffbb41fa8a88
[67242.065692] x21: ffffffbb4207fb9c x20: ffffffbb4207fba0
[67242.065725] x19: ffffffbb4207fb98 x18: 0000000000000000
[67242.065758] x17: 0000000000000000 x16: ffffffd042022094
[67242.065791] x15: 1ffffff77ed4b71a x14: 1ffffff77ed4b719
[67242.065824] x13: 0000000000000000 x12: 0000000000000000
[67242.065857] x11: 0000000000000000 x10: dfffffd000000001
[67242.065890] x9 : 0000000000000000 x8 : 0000000000000002
[67242.065923] x7 : 0000000000000000 x6 : 000000000000003f
[67242.065956] x5 : 0000000000000040 x4 : ffffffffffffffe0
[67242.065989] x3 : ffffffd043b841b8 x2 : 0000000000000000
[67242.066021] x1 : 0000000000000010 x0 : 0000000000000010
[67242.066055] Call trace:
[67242.066092]  vpu_dec_ipi_handler+0xa0/0xb20 [mtk_vcodec_dec
12220d230d83a7426fc38c56b3e7bc6066955bae]
[67242.066119]  scp_ipi_handler+0x11c/0x244 [mtk_scp
8fb69c2ef141dd3192518b952b65aba35627b8bf]
[67242.066145]  mt8192_scp_irq_handler+0x70/0x128 [mtk_scp
8fb69c2ef141dd3192518b952b65aba35627b8bf]
[67242.066172]  scp_irq_handler+0xa0/0x114 [mtk_scp
8fb69c2ef141dd3192518b952b65aba35627b8bf]
[67242.066200]  irq_thread_fn+0x84/0xf8
[67242.066220]  irq_thread+0x170/0x1ec
[67242.066242]  kthread+0x2f8/0x3b8
[67242.066264]  ret_from_fork+0x10/0x30
[67242.066292] Code: 38f96908 35003628 91004340 d343fc08 (38f96908)

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: Macpaul Lin <macpaul.lin@mediatek.com>
---
 drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c b/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c
index 35f4d5583084..1041dd663e76 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c
@@ -91,6 +91,11 @@ static void vpu_dec_ipi_handler(void *data, unsigned int len, void *priv)
 	struct vdec_vpu_inst *vpu = (struct vdec_vpu_inst *)
 					(unsigned long)msg->ap_inst_addr;
 
+	if (!vpu) {
+		mtk_v4l2_err("ap_inst_addr is NULL");
+		return;
+	}
+
 	mtk_vcodec_debug(vpu, "+ id=%X", msg->msg_id);
 
 	vpu->failure = msg->status;
-- 
2.18.0

[PATCH v5, 7/7] media: mediatek: vcodec: Add to support H264 inner racing mode

[Yunfei Dong]

In order to reduce decoder latency, enable H264 inner racing mode.

Send lat trans buffer information to core when trigger lat to work,
need not to wait until lat decode done.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
 .../mediatek/vcodec/mtk_vcodec_dec_drv.c      |  4 +++
 .../mediatek/vcodec/mtk_vcodec_dec_pm.c       | 34 +++++++++++++++++++
 .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 10 ++++++
 .../vcodec/vdec/vdec_h264_req_multi_if.c      | 29 +++++++++++-----
 4 files changed, 69 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
index b9b99770c5cb..456cf33bc74f 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
@@ -388,6 +388,10 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 		}
 	}
 
+	atomic_set(&dev->dec_active_cnt, 0);
+	memset(dev->vdec_racing_info, 0, sizeof(dev->vdec_racing_info));
+	mutex_init(&dev->dec_racing_info_mutex);
+
 	ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, -1);
 	if (ret) {
 		mtk_v4l2_err("Failed to register video device");
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
index d69faa463d04..4305e4eb9900 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_pm.c
@@ -144,6 +144,34 @@ static void mtk_vcodec_dec_disable_irq(struct mtk_vcodec_dev *vdec_dev, int hw_i
 	}
 }
 
+static void mtk_vcodec_load_racing_info(struct mtk_vcodec_ctx *ctx)
+{
+	void __iomem *vdec_racing_addr;
+	int j;
+
+	mutex_lock(&ctx->dev->dec_racing_info_mutex);
+	if (atomic_inc_return(&ctx->dev->dec_active_cnt) == 1) {
+		vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
+		for (j = 0; j < 132; j++)
+			writel(ctx->dev->vdec_racing_info[j], vdec_racing_addr + j * 4);
+	}
+	mutex_unlock(&ctx->dev->dec_racing_info_mutex);
+}
+
+static void mtk_vcodec_record_racing_info(struct mtk_vcodec_ctx *ctx)
+{
+	void __iomem *vdec_racing_addr;
+	int j;
+
+	mutex_lock(&ctx->dev->dec_racing_info_mutex);
+	if (atomic_dec_and_test(&ctx->dev->dec_active_cnt)) {
+		vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
+		for (j = 0; j < 132; j++)
+			ctx->dev->vdec_racing_info[j] = readl(vdec_racing_addr + j * 4);
+	}
+	mutex_unlock(&ctx->dev->dec_racing_info_mutex);
+}
+
 static struct mtk_vcodec_pm *mtk_vcodec_dec_get_pm(struct mtk_vcodec_dev *vdec_dev,
 						   int hw_idx)
 {
@@ -214,11 +242,17 @@ void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_ctx *ctx, int hw_idx)
 	mtk_vcodec_dec_child_dev_on(ctx->dev, hw_idx);
 
 	mtk_vcodec_dec_enable_irq(ctx->dev, hw_idx);
+
+	if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
+		mtk_vcodec_load_racing_info(ctx);
 }
 EXPORT_SYMBOL_GPL(mtk_vcodec_dec_enable_hardware);
 
 void mtk_vcodec_dec_disable_hardware(struct mtk_vcodec_ctx *ctx, int hw_idx)
 {
+	if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
+		mtk_vcodec_record_racing_info(ctx);
+
 	mtk_vcodec_dec_disable_irq(ctx->dev, hw_idx);
 
 	mtk_vcodec_dec_child_dev_off(ctx->dev, hw_idx);
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
index 0e3db8ccb398..677f47b34172 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
@@ -28,6 +28,7 @@
 #define MTK_V4L2_BENCHMARK	0
 #define WAIT_INTR_TIMEOUT_MS	1000
 #define IS_VDEC_LAT_ARCH(hw_arch) ((hw_arch) >= MTK_VDEC_LAT_SINGLE_CORE)
+#define IS_VDEC_INNER_RACING(capability) (capability & MTK_VCODEC_INNER_RACING)
 
 /*
  * enum mtk_hw_reg_idx - MTK hw register base index
@@ -357,6 +358,7 @@ enum mtk_vdec_format_types {
 	MTK_VDEC_FORMAT_H264_SLICE = 0x100,
 	MTK_VDEC_FORMAT_VP8_FRAME = 0x200,
 	MTK_VDEC_FORMAT_VP9_FRAME = 0x400,
+	MTK_VCODEC_INNER_RACING = 0x20000,
 };
 
 /**
@@ -478,6 +480,10 @@ struct mtk_vcodec_enc_pdata {
  * @subdev_dev: subdev hardware device
  * @subdev_prob_done: check whether all used hw device is prob done
  * @subdev_bitmap: used to record hardware is ready or not
+ *
+ * @dec_active_cnt: used to mark whether need to record register value
+ * @vdec_racing_info: record register value
+ * @dec_racing_info_mutex: mutex lock used for inner racing mode
  */
 struct mtk_vcodec_dev {
 	struct v4l2_device v4l2_dev;
@@ -523,6 +529,10 @@ struct mtk_vcodec_dev {
 	void *subdev_dev[MTK_VDEC_HW_MAX];
 	int (*subdev_prob_done)(struct mtk_vcodec_dev *vdec_dev);
 	DECLARE_BITMAP(subdev_bitmap, MTK_VDEC_HW_MAX);
+
+	atomic_t dec_active_cnt;
+	u32 vdec_racing_info[132];
+	struct mutex dec_racing_info_mutex;
 };
 
 static inline struct mtk_vcodec_ctx *fh_to_ctx(struct v4l2_fh *fh)
diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c
index e02e89ae4fd1..03b50b161fe4 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c
@@ -627,6 +627,17 @@ static int vdec_h264_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
 		goto err_dec_err;
 	}
 
+	share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
+	inst->vsi->wdma_end_addr_offset;
+	share_info->trans_start = inst->ctx->msg_queue.wdma_wptr_addr;
+	share_info->nal_info = inst->vsi->dec.nal_info;
+
+	if (IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
+		memcpy_fromio(&share_info->h264_slice_params,
+			      &inst->vsi->h264_slice_params,
+			      sizeof(share_info->h264_slice_params));
+		vdec_msg_queue_qbuf(&inst->ctx->dev->msg_queue_core_ctx, lat_buf);
+	}
 	/* wait decoder done interrupt */
 	timeout = mtk_vcodec_wait_for_done_ctx(inst->ctx, MTK_INST_IRQ_RECEIVED,
 					       WAIT_INTR_TIMEOUT_MS, MTK_VDEC_LAT0);
@@ -640,22 +651,24 @@ static int vdec_h264_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
 
 	share_info->trans_end = inst->ctx->msg_queue.wdma_addr.dma_addr +
 		inst->vsi->wdma_end_addr_offset;
-	share_info->trans_start = inst->ctx->msg_queue.wdma_wptr_addr;
-	share_info->nal_info = inst->vsi->dec.nal_info;
 	vdec_msg_queue_update_ube_wptr(&lat_buf->ctx->msg_queue,
 				       share_info->trans_end);
-
-	memcpy_fromio(&share_info->h264_slice_params,
-		      (void __iomem *)&inst->vsi->h264_slice_params,
-		      sizeof(share_info->h264_slice_params));
-	vdec_msg_queue_qbuf(&inst->ctx->dev->msg_queue_core_ctx, lat_buf);
+	if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability)) {
+		memcpy_fromio(&share_info->h264_slice_params,
+			      (void __iomem *)&inst->vsi->h264_slice_params,
+			      sizeof(share_info->h264_slice_params));
+		vdec_msg_queue_qbuf(&inst->ctx->dev->msg_queue_core_ctx, lat_buf);
+	}
+	mtk_vcodec_debug(inst, "dec num: %d lat crc: 0x%x 0x%x 0x%x", inst->slice_dec_num,
+			 inst->vsi->dec.crc[0], inst->vsi->dec.crc[1], inst->vsi->dec.crc[2]);
 
 	inst->slice_dec_num++;
 	return 0;
 
 err_dec_err:
+	if (!IS_VDEC_INNER_RACING(inst->ctx->dev->dec_capability))
+		vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
 err_free_fb_out:
-	vdec_msg_queue_qbuf(&inst->ctx->msg_queue.lat_ctx, lat_buf);
 	mtk_vcodec_err(inst, "slice dec number: %d err: %d", inst->slice_dec_num, err);
 	return err;
 }
-- 
2.18.0