media: ipu7: align code from kernel staging

drivers/media/pci/intel/ipu7/ipu7-dma.c

@@ -219,6 +219,8 @@ void *ipu7_dma_alloc(struct ipu7_bus_device *sys, size_t size,
 		}
 	}
 
+	mmu->tlb_invalidate(mmu);
+
 	info->vaddr = vmap(pages, count, VM_USERMAP, PAGE_KERNEL);
 	if (!info->vaddr)
 		goto out_unmap;

drivers/media/pci/intel/ipu7/ipu7-isys-csi2.c

@@ -104,7 +104,7 @@ static int csi2_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
 	case V4L2_EVENT_FRAME_SYNC:
 		return v4l2_event_subscribe(fh, sub, 10, NULL);
 	case V4L2_EVENT_CTRL:
-		return v4l2_ctrl_subscribe_event(fh, sub);
+		return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
 	default:
 		return -EINVAL;
 	}

drivers/media/pci/intel/ipu7/ipu7-isys-queue.c

@@ -92,7 +92,9 @@ static int ipu7_isys_queue_setup(struct vb2_queue *q, unsigned int *num_buffers,
 static int ipu7_isys_buf_prepare(struct vb2_buffer *vb)
 {
 	struct ipu7_isys_queue *aq = vb2_queue_to_isys_queue(vb->vb2_queue);
+	struct ipu7_isys *isys = vb2_get_drv_priv(vb->vb2_queue);
 	struct ipu7_isys_video *av = ipu7_isys_queue_to_video(aq);
+	struct sg_table *sg = vb2_dma_sg_plane_desc(vb, 0);
 	struct device *dev = &av->isys->adev->auxdev.dev;
 	u32 bytesperline = av->pix_fmt.bytesperline;
 	u32 height = av->pix_fmt.height;
@@ -107,6 +109,9 @@ static int ipu7_isys_buf_prepare(struct vb2_buffer *vb)
 		av->vdev.name, bytesperline, height);
 	vb2_set_plane_payload(vb, 0, bytesperline * height);
 
+	/* assume IPU is not DMA coherent */
+	ipu7_dma_sync_sgtable(isys->adev, sg);
+
 	return 0;
 }
 
@@ -756,7 +761,17 @@ static int reset_start_streaming(struct ipu7_isys_video *av)
 		goto out;
 
 	bl = &__bl;
-	ret = buffer_list_get(stream, bl);
+	int retry = 5;
+	while (retry--) {
+		ret = buffer_list_get(stream, bl);
+		if (ret < 0) {
+			dev_dbg(dev, "wait for incoming buffer, retry %d\n", retry);
+			usleep_range(100000, 110000);
+			continue;
+		}
+		break;
+	}
+
 	/*
 	 * In reset start streaming and no buffer available,
 	 * it is considered that gstreamer has been closed,
@@ -898,7 +913,7 @@ static void stop_streaming(struct vb2_queue *q)
 	mutex_lock(&av->isys->reset_mutex);
 	while (av->isys->state) {
 		mutex_unlock(&av->isys->reset_mutex);
-		dev_dbg(dev, "stop: %s: wait for rest or stop, isys->state = %d\n",
+		dev_dbg(dev, "stop: %s: wait for reset or stop, isys->state = %d\n",
 			av->vdev.name, av->isys->state);
 		usleep_range(10000, 11000);
 		mutex_lock(&av->isys->reset_mutex);

drivers/media/pci/intel/ipu7/ipu7-isys-video.c

@@ -1193,13 +1193,13 @@ int ipu7_isys_video_init(struct ipu7_isys_video *av)
 
 	__ipu_isys_vidioc_try_fmt_vid_cap(av, &format);
 	av->pix_fmt = format.fmt.pix;
+
 #ifdef CONFIG_VIDEO_INTEL_IPU7_ISYS_RESET
 	av->reset = false;
 	av->skipframe = 0;
 	av->start_streaming = 0;
 #endif
 
-	set_bit(V4L2_FL_USES_V4L2_FH, &av->vdev.flags);
 	video_set_drvdata(&av->vdev, av);
 
 	ret = video_register_device(&av->vdev, VFL_TYPE_VIDEO, -1);

drivers/media/pci/intel/ipu7/ipu7-isys.c

@@ -1076,7 +1076,7 @@ static int isys_probe(struct auxiliary_device *auxdev,
 #endif
 
 	cpu_latency_qos_add_request(&isys->pm_qos, PM_QOS_DEFAULT_VALUE);
-	ret = alloc_fw_msg_bufs(isys, 40);
+	ret = alloc_fw_msg_bufs(isys, 20);
 	if (ret < 0)
 		goto out_cleanup_isys;
 

drivers/media/pci/intel/ipu7/ipu7.c

@@ -2750,7 +2750,6 @@ static void ipu7_pci_remove(struct pci_dev *pdev)
 	ipu_buttress_exit(isp);
 
 	release_firmware(isp->cpd_fw);
-
 }
 
 static void ipu7_pci_reset_prepare(struct pci_dev *pdev)