M: Maxime Ripard <mripard@kernel.org>
L: linux-media@vger.kernel.org
T: git git://linuxtv.org/media_tree.git
+F: drivers/media/platform/sunxi/sun4i-csi/
F: Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml
S: Maintained
+source "drivers/media/platform/sunxi/sun4i-csi/Kconfig"
source "drivers/media/platform/sunxi/sun6i-csi/Kconfig"
+obj-y += sun4i-csi/
obj-y += sun6i-csi/
--- /dev/null
+config VIDEO_SUN4I_CSI
+ tristate "Allwinner A10 CMOS Sensor Interface Support"
+ depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API && HAS_DMA
+ depends on ARCH_SUNXI || COMPILE_TEST
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_FWNODE
+ help
+ This is a V4L2 driver for the Allwinner A10 CSI
+
+ To compile this driver as a module, choose M here: the module
+ will be called sun4i_csi.
--- /dev/null
+sun4i-csi-y += sun4i_csi.o
+sun4i-csi-y += sun4i_dma.o
+sun4i-csi-y += sun4i_v4l2.o
+
+obj-$(CONFIG_VIDEO_SUN4I_CSI) += sun4i-csi.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 NextThing Co
+ * Copyright (C) 2016-2019 Bootlin
+ *
+ * Author: Maxime Ripard <maxime.ripard@bootlin.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mediabus.h>
+
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "sun4i_csi.h"
+
+static const struct media_entity_operations sun4i_csi_video_entity_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static int sun4i_csi_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct sun4i_csi *csi = container_of(notifier, struct sun4i_csi,
+ notifier);
+
+ csi->src_subdev = subdev;
+ csi->src_pad = media_entity_get_fwnode_pad(&subdev->entity,
+ subdev->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (csi->src_pad < 0) {
+ dev_err(csi->dev, "Couldn't find output pad for subdev %s\n",
+ subdev->name);
+ return csi->src_pad;
+ }
+
+ dev_dbg(csi->dev, "Bound %s pad: %d\n", subdev->name, csi->src_pad);
+ return 0;
+}
+
+static int sun4i_csi_notify_complete(struct v4l2_async_notifier *notifier)
+{
+ struct sun4i_csi *csi = container_of(notifier, struct sun4i_csi,
+ notifier);
+ struct v4l2_subdev *subdev = &csi->subdev;
+ struct video_device *vdev = &csi->vdev;
+ int ret;
+
+ ret = v4l2_device_register_subdev(&csi->v4l, subdev);
+ if (ret < 0)
+ return ret;
+
+ ret = sun4i_csi_v4l2_register(csi);
+ if (ret < 0)
+ return ret;
+
+ ret = media_device_register(&csi->mdev);
+ if (ret)
+ return ret;
+
+ /* Create link from subdev to main device */
+ ret = media_create_pad_link(&subdev->entity, CSI_SUBDEV_SOURCE,
+ &vdev->entity, 0,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret)
+ goto err_clean_media;
+
+ ret = media_create_pad_link(&csi->src_subdev->entity, csi->src_pad,
+ &subdev->entity, CSI_SUBDEV_SINK,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret)
+ goto err_clean_media;
+
+ ret = v4l2_device_register_subdev_nodes(&csi->v4l);
+ if (ret < 0)
+ goto err_clean_media;
+
+ return 0;
+
+err_clean_media:
+ media_device_unregister(&csi->mdev);
+
+ return ret;
+}
+
+static const struct v4l2_async_notifier_operations sun4i_csi_notify_ops = {
+ .bound = sun4i_csi_notify_bound,
+ .complete = sun4i_csi_notify_complete,
+};
+
+static int sun4i_csi_notifier_init(struct sun4i_csi *csi)
+{
+ struct v4l2_fwnode_endpoint vep = {
+ .bus_type = V4L2_MBUS_PARALLEL,
+ };
+ struct fwnode_handle *ep;
+ int ret;
+
+ v4l2_async_notifier_init(&csi->notifier);
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csi->dev), 0, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+ if (!ep)
+ return -EINVAL;
+
+ ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+ if (ret)
+ goto out;
+
+ csi->bus = vep.bus.parallel;
+
+ ret = v4l2_async_notifier_add_fwnode_remote_subdev(&csi->notifier,
+ ep, &csi->asd);
+ if (ret)
+ goto out;
+
+ csi->notifier.ops = &sun4i_csi_notify_ops;
+
+out:
+ fwnode_handle_put(ep);
+ return ret;
+}
+
+static int sun4i_csi_probe(struct platform_device *pdev)
+{
+ struct v4l2_subdev *subdev;
+ struct video_device *vdev;
+ struct sun4i_csi *csi;
+ struct resource *res;
+ int ret;
+ int irq;
+
+ csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL);
+ if (!csi)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, csi);
+ csi->dev = &pdev->dev;
+ subdev = &csi->subdev;
+ vdev = &csi->vdev;
+
+ csi->mdev.dev = csi->dev;
+ strscpy(csi->mdev.model, "Allwinner Video Capture Device",
+ sizeof(csi->mdev.model));
+ csi->mdev.hw_revision = 0;
+ media_device_init(&csi->mdev);
+ csi->v4l.mdev = &csi->mdev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ csi->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(csi->regs))
+ return PTR_ERR(csi->regs);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ csi->bus_clk = devm_clk_get(&pdev->dev, "bus");
+ if (IS_ERR(csi->bus_clk)) {
+ dev_err(&pdev->dev, "Couldn't get our bus clock\n");
+ return PTR_ERR(csi->bus_clk);
+ }
+
+ csi->isp_clk = devm_clk_get(&pdev->dev, "isp");
+ if (IS_ERR(csi->isp_clk)) {
+ dev_err(&pdev->dev, "Couldn't get our ISP clock\n");
+ return PTR_ERR(csi->isp_clk);
+ }
+
+ csi->ram_clk = devm_clk_get(&pdev->dev, "ram");
+ if (IS_ERR(csi->ram_clk)) {
+ dev_err(&pdev->dev, "Couldn't get our ram clock\n");
+ return PTR_ERR(csi->ram_clk);
+ }
+
+ csi->rst = devm_reset_control_get(&pdev->dev, NULL);
+ if (IS_ERR(csi->rst)) {
+ dev_err(&pdev->dev, "Couldn't get our reset line\n");
+ return PTR_ERR(csi->rst);
+ }
+
+ /* Initialize subdev */
+ v4l2_subdev_init(subdev, &sun4i_csi_subdev_ops);
+ subdev->flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
+ subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ subdev->owner = THIS_MODULE;
+ snprintf(subdev->name, sizeof(subdev->name), "sun4i-csi-0");
+ v4l2_set_subdevdata(subdev, csi);
+
+ csi->subdev_pads[CSI_SUBDEV_SINK].flags =
+ MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
+ csi->subdev_pads[CSI_SUBDEV_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&subdev->entity, CSI_SUBDEV_PADS,
+ csi->subdev_pads);
+ if (ret < 0)
+ return ret;
+
+ csi->vdev_pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
+ vdev->entity.ops = &sun4i_csi_video_entity_ops;
+ ret = media_entity_pads_init(&vdev->entity, 1, &csi->vdev_pad);
+ if (ret < 0)
+ return ret;
+
+ ret = sun4i_csi_dma_register(csi, irq);
+ if (ret)
+ goto err_clean_pad;
+
+ ret = sun4i_csi_notifier_init(csi);
+ if (ret)
+ goto err_unregister_media;
+
+ ret = v4l2_async_notifier_register(&csi->v4l, &csi->notifier);
+ if (ret) {
+ dev_err(csi->dev, "Couldn't register our notifier.\n");
+ goto err_unregister_media;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+err_unregister_media:
+ media_device_unregister(&csi->mdev);
+ sun4i_csi_dma_unregister(csi);
+
+err_clean_pad:
+ media_device_cleanup(&csi->mdev);
+
+ return ret;
+}
+
+static int sun4i_csi_remove(struct platform_device *pdev)
+{
+ struct sun4i_csi *csi = platform_get_drvdata(pdev);
+
+ v4l2_async_notifier_unregister(&csi->notifier);
+ v4l2_async_notifier_cleanup(&csi->notifier);
+ media_device_unregister(&csi->mdev);
+ sun4i_csi_dma_unregister(csi);
+ media_device_cleanup(&csi->mdev);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_csi_of_match[] = {
+ { .compatible = "allwinner,sun7i-a20-csi0" },
+ { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sun4i_csi_of_match);
+
+static int __maybe_unused sun4i_csi_runtime_resume(struct device *dev)
+{
+ struct sun4i_csi *csi = dev_get_drvdata(dev);
+
+ reset_control_deassert(csi->rst);
+ clk_prepare_enable(csi->bus_clk);
+ clk_prepare_enable(csi->ram_clk);
+ clk_set_rate(csi->isp_clk, 80000000);
+ clk_prepare_enable(csi->isp_clk);
+
+ writel(1, csi->regs + CSI_EN_REG);
+
+ return 0;
+}
+
+static int __maybe_unused sun4i_csi_runtime_suspend(struct device *dev)
+{
+ struct sun4i_csi *csi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(csi->isp_clk);
+ clk_disable_unprepare(csi->ram_clk);
+ clk_disable_unprepare(csi->bus_clk);
+
+ reset_control_assert(csi->rst);
+
+ return 0;
+}
+
+static const struct dev_pm_ops sun4i_csi_pm_ops = {
+ SET_RUNTIME_PM_OPS(sun4i_csi_runtime_suspend,
+ sun4i_csi_runtime_resume,
+ NULL)
+};
+
+static struct platform_driver sun4i_csi_driver = {
+ .probe = sun4i_csi_probe,
+ .remove = sun4i_csi_remove,
+ .driver = {
+ .name = "sun4i-csi",
+ .of_match_table = sun4i_csi_of_match,
+ .pm = &sun4i_csi_pm_ops,
+ },
+};
+module_platform_driver(sun4i_csi_driver);
+
+MODULE_DESCRIPTION("Allwinner A10 Camera Sensor Interface driver");
+MODULE_AUTHOR("Maxime Ripard <mripard@kernel.org>");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 NextThing Co
+ * Copyright (C) 2016-2019 Bootlin
+ *
+ * Author: Maxime Ripard <maxime.ripard@bootlin.com>
+ */
+
+#ifndef _SUN4I_CSI_H_
+#define _SUN4I_CSI_H_
+
+#include <media/media-device.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/videobuf2-core.h>
+
+#define CSI_EN_REG 0x00
+
+#define CSI_CFG_REG 0x04
+#define CSI_CFG_INPUT_FMT(fmt) ((fmt) << 20)
+#define CSI_CFG_OUTPUT_FMT(fmt) ((fmt) << 16)
+#define CSI_CFG_YUV_DATA_SEQ(seq) ((seq) << 8)
+#define CSI_CFG_VSYNC_POL(pol) ((pol) << 2)
+#define CSI_CFG_HSYNC_POL(pol) ((pol) << 1)
+#define CSI_CFG_PCLK_POL(pol) ((pol) << 0)
+
+#define CSI_CPT_CTRL_REG 0x08
+#define CSI_CPT_CTRL_VIDEO_START BIT(1)
+#define CSI_CPT_CTRL_IMAGE_START BIT(0)
+
+#define CSI_BUF_ADDR_REG(fifo, buf) (0x10 + (0x8 * (fifo)) + (0x4 * (buf)))
+
+#define CSI_BUF_CTRL_REG 0x28
+#define CSI_BUF_CTRL_DBN BIT(2)
+#define CSI_BUF_CTRL_DBS BIT(1)
+#define CSI_BUF_CTRL_DBE BIT(0)
+
+#define CSI_INT_EN_REG 0x30
+#define CSI_INT_FRM_DONE BIT(1)
+#define CSI_INT_CPT_DONE BIT(0)
+
+#define CSI_INT_STA_REG 0x34
+
+#define CSI_WIN_CTRL_W_REG 0x40
+#define CSI_WIN_CTRL_W_ACTIVE(w) ((w) << 16)
+
+#define CSI_WIN_CTRL_H_REG 0x44
+#define CSI_WIN_CTRL_H_ACTIVE(h) ((h) << 16)
+
+#define CSI_BUF_LEN_REG 0x48
+
+#define CSI_MAX_BUFFER 2
+#define CSI_MAX_HEIGHT 8192U
+#define CSI_MAX_WIDTH 8192U
+
+enum csi_input {
+ CSI_INPUT_RAW = 0,
+ CSI_INPUT_BT656 = 2,
+ CSI_INPUT_YUV = 3,
+};
+
+enum csi_output_raw {
+ CSI_OUTPUT_RAW_PASSTHROUGH = 0,
+};
+
+enum csi_output_yuv {
+ CSI_OUTPUT_YUV_422_PLANAR = 0,
+ CSI_OUTPUT_YUV_420_PLANAR = 1,
+ CSI_OUTPUT_YUV_422_UV = 4,
+ CSI_OUTPUT_YUV_420_UV = 5,
+ CSI_OUTPUT_YUV_422_MACRO = 8,
+ CSI_OUTPUT_YUV_420_MACRO = 9,
+};
+
+enum csi_yuv_data_seq {
+ CSI_YUV_DATA_SEQ_YUYV = 0,
+ CSI_YUV_DATA_SEQ_YVYU = 1,
+ CSI_YUV_DATA_SEQ_UYVY = 2,
+ CSI_YUV_DATA_SEQ_VYUY = 3,
+};
+
+enum csi_subdev_pads {
+ CSI_SUBDEV_SINK,
+ CSI_SUBDEV_SOURCE,
+
+ CSI_SUBDEV_PADS,
+};
+
+extern const struct v4l2_subdev_ops sun4i_csi_subdev_ops;
+
+struct sun4i_csi_format {
+ u32 mbus;
+ u32 fourcc;
+ enum csi_input input;
+ u32 output;
+ unsigned int num_planes;
+ u8 bpp[3];
+ unsigned int hsub;
+ unsigned int vsub;
+};
+
+const struct sun4i_csi_format *sun4i_csi_find_format(const u32 *fourcc,
+ const u32 *mbus);
+
+struct sun4i_csi {
+ /* Device resources */
+ struct device *dev;
+
+ void __iomem *regs;
+ struct clk *bus_clk;
+ struct clk *isp_clk;
+ struct clk *ram_clk;
+ struct reset_control *rst;
+
+ struct vb2_v4l2_buffer *current_buf[CSI_MAX_BUFFER];
+
+ struct {
+ size_t size;
+ void *vaddr;
+ dma_addr_t paddr;
+ } scratch;
+
+ struct v4l2_fwnode_bus_parallel bus;
+
+ /* Main Device */
+ struct v4l2_device v4l;
+ struct media_device mdev;
+ struct video_device vdev;
+ struct media_pad vdev_pad;
+ struct v4l2_pix_format_mplane fmt;
+
+ /* Local subdev */
+ struct v4l2_subdev subdev;
+ struct media_pad subdev_pads[CSI_SUBDEV_PADS];
+ struct v4l2_mbus_framefmt subdev_fmt;
+
+ /* V4L2 Async variables */
+ struct v4l2_async_subdev asd;
+ struct v4l2_async_notifier notifier;
+ struct v4l2_subdev *src_subdev;
+ int src_pad;
+
+ /* V4L2 variables */
+ struct mutex lock;
+
+ /* Videobuf2 */
+ struct vb2_queue queue;
+ struct list_head buf_list;
+ spinlock_t qlock;
+ unsigned int sequence;
+};
+
+int sun4i_csi_dma_register(struct sun4i_csi *csi, int irq);
+void sun4i_csi_dma_unregister(struct sun4i_csi *csi);
+
+int sun4i_csi_v4l2_register(struct sun4i_csi *csi);
+
+#endif /* _SUN4I_CSI_H_ */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 NextThing Co
+ * Copyright (C) 2016-2019 Bootlin
+ *
+ * Author: Maxime Ripard <maxime.ripard@bootlin.com>
+ */
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "sun4i_csi.h"
+
+struct sun4i_csi_buffer {
+ struct vb2_v4l2_buffer vb;
+ struct list_head list;
+};
+
+static inline struct sun4i_csi_buffer *
+vb2_v4l2_to_csi_buffer(const struct vb2_v4l2_buffer *p)
+{
+ return container_of(p, struct sun4i_csi_buffer, vb);
+}
+
+static inline struct sun4i_csi_buffer *
+vb2_to_csi_buffer(const struct vb2_buffer *p)
+{
+ return vb2_v4l2_to_csi_buffer(to_vb2_v4l2_buffer(p));
+}
+
+static void sun4i_csi_capture_start(struct sun4i_csi *csi)
+{
+ writel(CSI_CPT_CTRL_VIDEO_START, csi->regs + CSI_CPT_CTRL_REG);
+}
+
+static void sun4i_csi_capture_stop(struct sun4i_csi *csi)
+{
+ writel(0, csi->regs + CSI_CPT_CTRL_REG);
+}
+
+static int sun4i_csi_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers,
+ unsigned int *nplanes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct sun4i_csi *csi = vb2_get_drv_priv(vq);
+ unsigned int num_planes = csi->fmt.num_planes;
+ unsigned int i;
+
+ if (*nplanes) {
+ if (*nplanes != num_planes)
+ return -EINVAL;
+
+ for (i = 0; i < num_planes; i++)
+ if (sizes[i] < csi->fmt.plane_fmt[i].sizeimage)
+ return -EINVAL;
+ return 0;
+ }
+
+ *nplanes = num_planes;
+ for (i = 0; i < num_planes; i++)
+ sizes[i] = csi->fmt.plane_fmt[i].sizeimage;
+
+ return 0;
+};
+
+static int sun4i_csi_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct sun4i_csi *csi = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned int i;
+
+ for (i = 0; i < csi->fmt.num_planes; i++) {
+ unsigned long size = csi->fmt.plane_fmt[i].sizeimage;
+
+ if (vb2_plane_size(vb, i) < size) {
+ dev_err(csi->dev, "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, i), size);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(vb, i, size);
+ }
+
+ return 0;
+}
+
+static int sun4i_csi_setup_scratch_buffer(struct sun4i_csi *csi,
+ unsigned int slot)
+{
+ dma_addr_t addr = csi->scratch.paddr;
+ unsigned int plane;
+
+ dev_dbg(csi->dev,
+ "No more available buffer, using the scratch buffer\n");
+
+ for (plane = 0; plane < csi->fmt.num_planes; plane++) {
+ writel(addr, csi->regs + CSI_BUF_ADDR_REG(plane, slot));
+ addr += csi->fmt.plane_fmt[plane].sizeimage;
+ }
+
+ csi->current_buf[slot] = NULL;
+ return 0;
+}
+
+static int sun4i_csi_buffer_fill_slot(struct sun4i_csi *csi, unsigned int slot)
+{
+ struct sun4i_csi_buffer *c_buf;
+ struct vb2_v4l2_buffer *v_buf;
+ unsigned int plane;
+
+ /*
+ * We should never end up in a situation where we overwrite an
+ * already filled slot.
+ */
+ if (WARN_ON(csi->current_buf[slot]))
+ return -EINVAL;
+
+ if (list_empty(&csi->buf_list))
+ return sun4i_csi_setup_scratch_buffer(csi, slot);
+
+ c_buf = list_first_entry(&csi->buf_list, struct sun4i_csi_buffer, list);
+ list_del_init(&c_buf->list);
+
+ v_buf = &c_buf->vb;
+ csi->current_buf[slot] = v_buf;
+
+ for (plane = 0; plane < csi->fmt.num_planes; plane++) {
+ dma_addr_t buf_addr;
+
+ buf_addr = vb2_dma_contig_plane_dma_addr(&v_buf->vb2_buf,
+ plane);
+ writel(buf_addr, csi->regs + CSI_BUF_ADDR_REG(plane, slot));
+ }
+
+ return 0;
+}
+
+static int sun4i_csi_buffer_fill_all(struct sun4i_csi *csi)
+{
+ unsigned int slot;
+ int ret;
+
+ for (slot = 0; slot < CSI_MAX_BUFFER; slot++) {
+ ret = sun4i_csi_buffer_fill_slot(csi, slot);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void sun4i_csi_buffer_mark_done(struct sun4i_csi *csi,
+ unsigned int slot,
+ unsigned int sequence)
+{
+ struct vb2_v4l2_buffer *v_buf;
+
+ if (!csi->current_buf[slot]) {
+ dev_dbg(csi->dev, "Scratch buffer was used, ignoring..\n");
+ return;
+ }
+
+ v_buf = csi->current_buf[slot];
+ v_buf->field = csi->fmt.field;
+ v_buf->sequence = sequence;
+ v_buf->vb2_buf.timestamp = ktime_get_ns();
+ vb2_buffer_done(&v_buf->vb2_buf, VB2_BUF_STATE_DONE);
+
+ csi->current_buf[slot] = NULL;
+}
+
+static int sun4i_csi_buffer_flip(struct sun4i_csi *csi, unsigned int sequence)
+{
+ u32 reg = readl(csi->regs + CSI_BUF_CTRL_REG);
+ unsigned int next;
+
+ /* Our next buffer is not the current buffer */
+ next = !(reg & CSI_BUF_CTRL_DBS);
+
+ /* Report the previous buffer as done */
+ sun4i_csi_buffer_mark_done(csi, next, sequence);
+
+ /* Put a new buffer in there */
+ return sun4i_csi_buffer_fill_slot(csi, next);
+}
+
+static void sun4i_csi_buffer_queue(struct vb2_buffer *vb)
+{
+ struct sun4i_csi *csi = vb2_get_drv_priv(vb->vb2_queue);
+ struct sun4i_csi_buffer *buf = vb2_to_csi_buffer(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&csi->qlock, flags);
+ list_add_tail(&buf->list, &csi->buf_list);
+ spin_unlock_irqrestore(&csi->qlock, flags);
+}
+
+static void return_all_buffers(struct sun4i_csi *csi,
+ enum vb2_buffer_state state)
+{
+ struct sun4i_csi_buffer *buf, *node;
+ unsigned int slot;
+
+ list_for_each_entry_safe(buf, node, &csi->buf_list, list) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->list);
+ }
+
+ for (slot = 0; slot < CSI_MAX_BUFFER; slot++) {
+ struct vb2_v4l2_buffer *v_buf = csi->current_buf[slot];
+
+ if (!v_buf)
+ continue;
+
+ vb2_buffer_done(&v_buf->vb2_buf, state);
+ csi->current_buf[slot] = NULL;
+ }
+}
+
+static int sun4i_csi_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct sun4i_csi *csi = vb2_get_drv_priv(vq);
+ struct v4l2_fwnode_bus_parallel *bus = &csi->bus;
+ const struct sun4i_csi_format *csi_fmt;
+ unsigned long hsync_pol, pclk_pol, vsync_pol;
+ unsigned long flags;
+ unsigned int i;
+ int ret;
+
+ csi_fmt = sun4i_csi_find_format(&csi->fmt.pixelformat, NULL);
+ if (!csi_fmt)
+ return -EINVAL;
+
+ dev_dbg(csi->dev, "Starting capture\n");
+
+ csi->sequence = 0;
+
+ /*
+ * We need a scratch buffer in case where we'll not have any
+ * more buffer queued so that we don't error out. One of those
+ * cases is when you end up at the last frame to capture, you
+ * don't havea any buffer queued any more, and yet it doesn't
+ * really matter since you'll never reach the next buffer.
+ *
+ * Since we support the multi-planar API, we need to have a
+ * buffer for each plane. Allocating a single one large enough
+ * to hold all the buffers is simpler, so let's go for that.
+ */
+ csi->scratch.size = 0;
+ for (i = 0; i < csi->fmt.num_planes; i++)
+ csi->scratch.size += csi->fmt.plane_fmt[i].sizeimage;
+
+ csi->scratch.vaddr = dma_alloc_coherent(csi->dev,
+ csi->scratch.size,
+ &csi->scratch.paddr,
+ GFP_KERNEL);
+ if (!csi->scratch.vaddr) {
+ dev_err(csi->dev, "Failed to allocate scratch buffer\n");
+ ret = -ENOMEM;
+ goto err_clear_dma_queue;
+ }
+
+ ret = media_pipeline_start(&csi->vdev.entity, &csi->vdev.pipe);
+ if (ret < 0)
+ goto err_free_scratch_buffer;
+
+ spin_lock_irqsave(&csi->qlock, flags);
+
+ /* Setup timings */
+ writel(CSI_WIN_CTRL_W_ACTIVE(csi->fmt.width * 2),
+ csi->regs + CSI_WIN_CTRL_W_REG);
+ writel(CSI_WIN_CTRL_H_ACTIVE(csi->fmt.height),
+ csi->regs + CSI_WIN_CTRL_H_REG);
+
+ hsync_pol = !!(bus->flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH);
+ pclk_pol = !!(bus->flags & V4L2_MBUS_DATA_ACTIVE_HIGH);
+ vsync_pol = !!(bus->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH);
+ writel(CSI_CFG_INPUT_FMT(csi_fmt->input) |
+ CSI_CFG_OUTPUT_FMT(csi_fmt->output) |
+ CSI_CFG_VSYNC_POL(vsync_pol) |
+ CSI_CFG_HSYNC_POL(hsync_pol) |
+ CSI_CFG_PCLK_POL(pclk_pol),
+ csi->regs + CSI_CFG_REG);
+
+ /* Setup buffer length */
+ writel(csi->fmt.plane_fmt[0].bytesperline,
+ csi->regs + CSI_BUF_LEN_REG);
+
+ /* Prepare our buffers in hardware */
+ ret = sun4i_csi_buffer_fill_all(csi);
+ if (ret) {
+ spin_unlock_irqrestore(&csi->qlock, flags);
+ goto err_disable_pipeline;
+ }
+
+ /* Enable double buffering */
+ writel(CSI_BUF_CTRL_DBE, csi->regs + CSI_BUF_CTRL_REG);
+
+ /* Clear the pending interrupts */
+ writel(CSI_INT_FRM_DONE, csi->regs + 0x34);
+
+ /* Enable frame done interrupt */
+ writel(CSI_INT_FRM_DONE, csi->regs + CSI_INT_EN_REG);
+
+ sun4i_csi_capture_start(csi);
+
+ spin_unlock_irqrestore(&csi->qlock, flags);
+
+ ret = v4l2_subdev_call(csi->src_subdev, video, s_stream, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ goto err_disable_device;
+
+ return 0;
+
+err_disable_device:
+ sun4i_csi_capture_stop(csi);
+
+err_disable_pipeline:
+ media_pipeline_stop(&csi->vdev.entity);
+
+err_free_scratch_buffer:
+ dma_free_coherent(csi->dev, csi->scratch.size, csi->scratch.vaddr,
+ csi->scratch.paddr);
+
+err_clear_dma_queue:
+ spin_lock_irqsave(&csi->qlock, flags);
+ return_all_buffers(csi, VB2_BUF_STATE_QUEUED);
+ spin_unlock_irqrestore(&csi->qlock, flags);
+
+ return ret;
+}
+
+static void sun4i_csi_stop_streaming(struct vb2_queue *vq)
+{
+ struct sun4i_csi *csi = vb2_get_drv_priv(vq);
+ unsigned long flags;
+
+ dev_dbg(csi->dev, "Stopping capture\n");
+
+ v4l2_subdev_call(csi->src_subdev, video, s_stream, 0);
+ sun4i_csi_capture_stop(csi);
+
+ /* Release all active buffers */
+ spin_lock_irqsave(&csi->qlock, flags);
+ return_all_buffers(csi, VB2_BUF_STATE_ERROR);
+ spin_unlock_irqrestore(&csi->qlock, flags);
+
+ media_pipeline_stop(&csi->vdev.entity);
+
+ dma_free_coherent(csi->dev, csi->scratch.size, csi->scratch.vaddr,
+ csi->scratch.paddr);
+}
+
+static const struct vb2_ops sun4i_csi_qops = {
+ .queue_setup = sun4i_csi_queue_setup,
+ .buf_prepare = sun4i_csi_buffer_prepare,
+ .buf_queue = sun4i_csi_buffer_queue,
+ .start_streaming = sun4i_csi_start_streaming,
+ .stop_streaming = sun4i_csi_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static irqreturn_t sun4i_csi_irq(int irq, void *data)
+{
+ struct sun4i_csi *csi = data;
+ u32 reg;
+
+ reg = readl(csi->regs + CSI_INT_STA_REG);
+
+ /* Acknowledge the interrupts */
+ writel(reg, csi->regs + CSI_INT_STA_REG);
+
+ if (!(reg & CSI_INT_FRM_DONE))
+ return IRQ_HANDLED;
+
+ spin_lock(&csi->qlock);
+ if (sun4i_csi_buffer_flip(csi, csi->sequence++)) {
+ dev_warn(csi->dev, "%s: Flip failed\n", __func__);
+ sun4i_csi_capture_stop(csi);
+ }
+ spin_unlock(&csi->qlock);
+
+ return IRQ_HANDLED;
+}
+
+int sun4i_csi_dma_register(struct sun4i_csi *csi, int irq)
+{
+ struct vb2_queue *q = &csi->queue;
+ int ret;
+ int i;
+
+ spin_lock_init(&csi->qlock);
+ mutex_init(&csi->lock);
+
+ INIT_LIST_HEAD(&csi->buf_list);
+ for (i = 0; i < CSI_MAX_BUFFER; i++)
+ csi->current_buf[i] = NULL;
+
+ q->min_buffers_needed = 3;
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ q->io_modes = VB2_MMAP;
+ q->lock = &csi->lock;
+ q->drv_priv = csi;
+ q->buf_struct_size = sizeof(struct sun4i_csi_buffer);
+ q->ops = &sun4i_csi_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->dev = csi->dev;
+
+ ret = vb2_queue_init(q);
+ if (ret < 0) {
+ dev_err(csi->dev, "failed to initialize VB2 queue\n");
+ goto err_free_mutex;
+ }
+
+ ret = v4l2_device_register(csi->dev, &csi->v4l);
+ if (ret) {
+ dev_err(csi->dev, "Couldn't register the v4l2 device\n");
+ goto err_free_queue;
+ }
+
+ ret = devm_request_irq(csi->dev, irq, sun4i_csi_irq, 0,
+ dev_name(csi->dev), csi);
+ if (ret) {
+ dev_err(csi->dev, "Couldn't register our interrupt\n");
+ goto err_unregister_device;
+ }
+
+ return 0;
+
+err_unregister_device:
+ v4l2_device_unregister(&csi->v4l);
+
+err_free_queue:
+ vb2_queue_release(q);
+
+err_free_mutex:
+ mutex_destroy(&csi->lock);
+ return ret;
+}
+
+void sun4i_csi_dma_unregister(struct sun4i_csi *csi)
+{
+ v4l2_device_unregister(&csi->v4l);
+ vb2_queue_release(&csi->queue);
+ mutex_destroy(&csi->lock);
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 NextThing Co
+ * Copyright (C) 2016-2019 Bootlin
+ *
+ * Author: Maxime Ripard <maxime.ripard@bootlin.com>
+ */
+
+#include <linux/device.h>
+#include <linux/pm_runtime.h>
+
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mc.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "sun4i_csi.h"
+
+#define CSI_DEFAULT_WIDTH 640
+#define CSI_DEFAULT_HEIGHT 480
+
+const struct sun4i_csi_format sun4i_csi_formats[] = {
+ /* YUV422 inputs */
+ {
+ .mbus = MEDIA_BUS_FMT_YUYV8_2X8,
+ .fourcc = V4L2_PIX_FMT_YUV420M,
+ .input = CSI_INPUT_YUV,
+ .output = CSI_OUTPUT_YUV_420_PLANAR,
+ .num_planes = 3,
+ .bpp = { 8, 8, 8 },
+ .hsub = 2,
+ .vsub = 2,
+ },
+};
+
+const struct sun4i_csi_format *sun4i_csi_find_format(const u32 *fourcc,
+ const u32 *mbus)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun4i_csi_formats); i++) {
+ if (fourcc && *fourcc != sun4i_csi_formats[i].fourcc)
+ continue;
+
+ if (mbus && *mbus != sun4i_csi_formats[i].mbus)
+ continue;
+
+ return &sun4i_csi_formats[i];
+ }
+
+ return NULL;
+}
+
+static int sun4i_csi_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+
+ strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+ strscpy(cap->card, "sun4i-csi", sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ dev_name(csi->dev));
+
+ return 0;
+}
+
+static int sun4i_csi_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ if (inp->index != 0)
+ return -EINVAL;
+
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ strscpy(inp->name, "Camera", sizeof(inp->name));
+
+ return 0;
+}
+
+static int sun4i_csi_g_input(struct file *file, void *fh,
+ unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int sun4i_csi_s_input(struct file *file, void *fh,
+ unsigned int i)
+{
+ if (i != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void _sun4i_csi_try_fmt(struct sun4i_csi *csi,
+ struct v4l2_pix_format_mplane *pix)
+{
+ const struct sun4i_csi_format *_fmt;
+ unsigned int height, width;
+ unsigned int i;
+
+ _fmt = sun4i_csi_find_format(&pix->pixelformat, NULL);
+ if (!_fmt)
+ _fmt = &sun4i_csi_formats[0];
+
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_SRGB;
+ pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
+ pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
+ pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, pix->colorspace,
+ pix->ycbcr_enc);
+
+ pix->num_planes = _fmt->num_planes;
+ pix->pixelformat = _fmt->fourcc;
+
+ memset(pix->reserved, 0, sizeof(pix->reserved));
+
+ /* Align the width and height on the subsampling */
+ width = ALIGN(pix->width, _fmt->hsub);
+ height = ALIGN(pix->height, _fmt->vsub);
+
+ /* Clamp the width and height to our capabilities */
+ pix->width = clamp(width, _fmt->hsub, CSI_MAX_WIDTH);
+ pix->height = clamp(height, _fmt->vsub, CSI_MAX_HEIGHT);
+
+ for (i = 0; i < _fmt->num_planes; i++) {
+ unsigned int hsub = i > 0 ? _fmt->hsub : 1;
+ unsigned int vsub = i > 0 ? _fmt->vsub : 1;
+ unsigned int bpl;
+
+ bpl = pix->width / hsub * _fmt->bpp[i] / 8;
+ pix->plane_fmt[i].bytesperline = bpl;
+ pix->plane_fmt[i].sizeimage = bpl * pix->height / vsub;
+ memset(pix->plane_fmt[i].reserved, 0,
+ sizeof(pix->plane_fmt[i].reserved));
+ }
+}
+
+static int sun4i_csi_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+
+ _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
+
+ return 0;
+}
+
+static int sun4i_csi_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+
+ _sun4i_csi_try_fmt(csi, &f->fmt.pix_mp);
+ csi->fmt = f->fmt.pix_mp;
+
+ return 0;
+}
+
+static int sun4i_csi_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+
+ f->fmt.pix_mp = csi->fmt;
+
+ return 0;
+}
+
+static int sun4i_csi_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->index >= ARRAY_SIZE(sun4i_csi_formats))
+ return -EINVAL;
+
+ f->pixelformat = sun4i_csi_formats[f->index].fourcc;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops sun4i_csi_ioctl_ops = {
+ .vidioc_querycap = sun4i_csi_querycap,
+
+ .vidioc_enum_fmt_vid_cap = sun4i_csi_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap_mplane = sun4i_csi_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap_mplane = sun4i_csi_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap_mplane = sun4i_csi_try_fmt_vid_cap,
+
+ .vidioc_enum_input = sun4i_csi_enum_input,
+ .vidioc_g_input = sun4i_csi_g_input,
+ .vidioc_s_input = sun4i_csi_s_input,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+static int sun4i_csi_open(struct file *file)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+ int ret;
+
+ ret = mutex_lock_interruptible(&csi->lock);
+ if (ret)
+ return ret;
+
+ ret = pm_runtime_get_sync(csi->dev);
+ if (ret < 0)
+ goto err_pm_put;
+
+ ret = v4l2_pipeline_pm_use(&csi->vdev.entity, 1);
+ if (ret)
+ goto err_pm_put;
+
+ ret = v4l2_fh_open(file);
+ if (ret)
+ goto err_pipeline_pm_put;
+
+ mutex_unlock(&csi->lock);
+
+ return 0;
+
+err_pipeline_pm_put:
+ v4l2_pipeline_pm_use(&csi->vdev.entity, 0);
+
+err_pm_put:
+ pm_runtime_put(csi->dev);
+ mutex_unlock(&csi->lock);
+
+ return ret;
+}
+
+static int sun4i_csi_release(struct file *file)
+{
+ struct sun4i_csi *csi = video_drvdata(file);
+
+ mutex_lock(&csi->lock);
+
+ v4l2_fh_release(file);
+ v4l2_pipeline_pm_use(&csi->vdev.entity, 0);
+ pm_runtime_put(csi->dev);
+
+ mutex_unlock(&csi->lock);
+
+ return 0;
+}
+
+static const struct v4l2_file_operations sun4i_csi_fops = {
+ .owner = THIS_MODULE,
+ .open = sun4i_csi_open,
+ .release = sun4i_csi_release,
+ .unlocked_ioctl = video_ioctl2,
+ .read = vb2_fop_read,
+ .write = vb2_fop_write,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+static const struct v4l2_mbus_framefmt sun4i_csi_pad_fmt_default = {
+ .width = CSI_DEFAULT_WIDTH,
+ .height = CSI_DEFAULT_HEIGHT,
+ .code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_RAW,
+ .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
+ .quantization = V4L2_QUANTIZATION_DEFAULT,
+ .xfer_func = V4L2_XFER_FUNC_DEFAULT,
+};
+
+static int sun4i_csi_subdev_init_cfg(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg)
+{
+ struct v4l2_mbus_framefmt *fmt;
+
+ fmt = v4l2_subdev_get_try_format(subdev, cfg, CSI_SUBDEV_SINK);
+ *fmt = sun4i_csi_pad_fmt_default;
+
+ return 0;
+}
+
+static int sun4i_csi_subdev_get_fmt(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
+ struct v4l2_mbus_framefmt *subdev_fmt;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ subdev_fmt = v4l2_subdev_get_try_format(subdev, cfg, fmt->pad);
+ else
+ subdev_fmt = &csi->subdev_fmt;
+
+ fmt->format = *subdev_fmt;
+
+ return 0;
+}
+
+static int sun4i_csi_subdev_set_fmt(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct sun4i_csi *csi = container_of(subdev, struct sun4i_csi, subdev);
+ struct v4l2_mbus_framefmt *subdev_fmt;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ subdev_fmt = v4l2_subdev_get_try_format(subdev, cfg, fmt->pad);
+ else
+ subdev_fmt = &csi->subdev_fmt;
+
+ /* We can only set the format on the sink pad */
+ if (fmt->pad == CSI_SUBDEV_SINK) {
+ /* It's the sink, only allow changing the frame size */
+ subdev_fmt->width = fmt->format.width;
+ subdev_fmt->height = fmt->format.height;
+ subdev_fmt->code = fmt->format.code;
+ }
+
+ fmt->format = *subdev_fmt;
+
+ return 0;
+}
+
+static int
+sun4i_csi_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *mbus)
+{
+ if (mbus->index >= ARRAY_SIZE(sun4i_csi_formats))
+ return -EINVAL;
+
+ mbus->code = sun4i_csi_formats[mbus->index].mbus;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops sun4i_csi_subdev_pad_ops = {
+ .link_validate = v4l2_subdev_link_validate_default,
+ .init_cfg = sun4i_csi_subdev_init_cfg,
+ .get_fmt = sun4i_csi_subdev_get_fmt,
+ .set_fmt = sun4i_csi_subdev_set_fmt,
+ .enum_mbus_code = sun4i_csi_subdev_enum_mbus_code,
+};
+
+const struct v4l2_subdev_ops sun4i_csi_subdev_ops = {
+ .pad = &sun4i_csi_subdev_pad_ops,
+};
+
+int sun4i_csi_v4l2_register(struct sun4i_csi *csi)
+{
+ struct video_device *vdev = &csi->vdev;
+ int ret;
+
+ vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
+ vdev->v4l2_dev = &csi->v4l;
+ vdev->queue = &csi->queue;
+ strscpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name));
+ vdev->release = video_device_release_empty;
+ vdev->lock = &csi->lock;
+
+ /* Set a default format */
+ csi->fmt.pixelformat = sun4i_csi_formats[0].fourcc,
+ csi->fmt.width = CSI_DEFAULT_WIDTH;
+ csi->fmt.height = CSI_DEFAULT_HEIGHT;
+ _sun4i_csi_try_fmt(csi, &csi->fmt);
+ csi->subdev_fmt = sun4i_csi_pad_fmt_default;
+
+ vdev->fops = &sun4i_csi_fops;
+ vdev->ioctl_ops = &sun4i_csi_ioctl_ops;
+ video_set_drvdata(vdev, csi);
+
+ ret = video_register_device(&csi->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret)
+ return ret;
+
+ dev_info(csi->dev, "Device registered as %s\n",
+ video_device_node_name(vdev));
+
+ return 0;
+}
projects / platform / kernel / linux-starfive.git / commitdiff