media: platform: amd: isp4 video node and buffers handling added

Isp video implements v4l2 video interface and supports NV12 and YUYV. It
manages buffers, pipeline power and state. Cherry-picked Sultan's DMA
buffer related fix from branch v6.16-drm-tip-isp4-for-amd on
https://github.com/kerneltoast/kernel_x86_laptop.git

Co-developed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Co-developed-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Bin Du <Bin.Du@amd.com>
Reviewed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Tested-by: Alexey Zagorodnikov <xglooom@gmail.com>
Tested-by: Kate Hsuan <hpa@redhat.com>

Author: Bin Du

MAINTAINERS

@@ -1180,6 +1180,8 @@ F:	drivers/media/platform/amd/isp4/isp4_interface.c
 F:	drivers/media/platform/amd/isp4/isp4_interface.h
 F:	drivers/media/platform/amd/isp4/isp4_subdev.c
 F:	drivers/media/platform/amd/isp4/isp4_subdev.h
+F:	drivers/media/platform/amd/isp4/isp4_video.c
+F:	drivers/media/platform/amd/isp4/isp4_video.h
 
 AMD KFD
 M:	Felix Kuehling <Felix.Kuehling@amd.com>

drivers/media/platform/amd/isp4/Makefile

@@ -5,4 +5,5 @@
 obj-$(CONFIG_VIDEO_AMD_ISP4_CAPTURE) += amd_isp4_capture.o
 amd_isp4_capture-objs := isp4.o \
                          isp4_interface.o \
-                         isp4_subdev.o
+                         isp4_subdev.o \
+                         isp4_video.o

drivers/media/platform/amd/isp4/isp4.c

@@ -173,6 +173,17 @@ static int isp4_capture_probe(struct platform_device *pdev)
 		goto err_pm_disable;
 	}
 
+	ret = media_create_pad_link(&isp_dev->isp_subdev.sdev.entity,
+				    0,
+				    &isp_dev->isp_subdev.isp_vdev.vdev.entity,
+				    0,
+				    MEDIA_LNK_FL_ENABLED |
+				    MEDIA_LNK_FL_IMMUTABLE);
+	if (ret) {
+		dev_err_probe(dev, ret, "fail to create pad link\n");
+		goto err_isp4_deinit;
+	}
+
 	ret = media_device_register(&isp_dev->mdev);
 	if (ret) {
 		dev_err_probe(dev, ret, "fail to register media device\n");

drivers/media/platform/amd/isp4/isp4_subdev.c

@@ -467,11 +467,13 @@ static void isp4sd_fw_resp_frame_done(struct isp4_subdev *isp_subdev,
 	     meta->preview.status == ISP4FW_BUFFER_STATUS_DONE ||
 	     meta->preview.status == ISP4FW_BUFFER_STATUS_DIRTY)) {
 		prev = isp4if_dequeue_buffer(ispif);
-		if (prev)
+		if (prev) {
+			isp4vid_handle_frame_done(&isp_subdev->isp_vdev,
+						  &prev->buf_info);
 			isp4if_dealloc_buffer_node(prev);
-		else
+		} else {
 			dev_err(dev, "fail null prev buf\n");
-
+		}
 	} else if (meta->preview.enabled) {
 		dev_err(dev, "fail bad preview status %u\n",
 			meta->preview.status);
@@ -1006,6 +1008,10 @@ int isp4sd_init(struct isp4_subdev *isp_subdev, struct v4l2_device *v4l2_dev,
 	isp_subdev->host2fw_seq_num = 1;
 	ispif->status = ISP4IF_STATUS_PWR_OFF;
 
+	ret = isp4vid_dev_init(&isp_subdev->isp_vdev, &isp_subdev->sdev);
+	if (ret)
+		goto err_subdev_unreg;
+
 	return 0;
 
 err_subdev_unreg:
@@ -1020,6 +1026,7 @@ void isp4sd_deinit(struct isp4_subdev *isp_subdev)
 {
 	struct isp4_interface *ispif = &isp_subdev->ispif;
 
+	isp4vid_dev_deinit(&isp_subdev->isp_vdev);
 	v4l2_device_unregister_subdev(&isp_subdev->sdev);
 	media_entity_cleanup(&isp_subdev->sdev.entity);
 	isp4if_deinit(ispif);

drivers/media/platform/amd/isp4/isp4_subdev.h

@@ -17,6 +17,7 @@
 #include "isp4_fw_cmd_resp.h"
 #include "isp4_hw_reg.h"
 #include "isp4_interface.h"
+#include "isp4_video.h"
 
 /*
  * One is for none sensor specific response which is not used now.
@@ -83,6 +84,7 @@ struct isp4_subdev_thread_param {
 struct isp4_subdev {
 	struct v4l2_subdev sdev;
 	struct isp4_interface ispif;
+	struct isp4vid_dev isp_vdev;
 
 	struct media_pad sdev_pad;