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Diffstat (limited to 'drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c')
-rw-r--r--drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c380
1 files changed, 380 insertions, 0 deletions
diff --git a/drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c b/drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c
new file mode 100644
index 000000000..48702134c
--- /dev/null
+++ b/drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c
@@ -0,0 +1,380 @@
+// 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
+
+static 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)
+{
+ strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+ strscpy(cap->card, "sun4i-csi", sizeof(cap->card));
+
+ 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;
+
+ /* 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;
+ }
+}
+
+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_resume_and_get(csi->dev);
+ if (ret < 0)
+ goto err_unlock;
+
+ ret = v4l2_pipeline_pm_get(&csi->vdev.entity);
+ 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_put(&csi->vdev.entity);
+
+err_pm_put:
+ pm_runtime_put(csi->dev);
+
+err_unlock:
+ 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);
+
+ _vb2_fop_release(file, NULL);
+
+ v4l2_pipeline_pm_put(&csi->vdev.entity);
+ 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,
+ .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_state *sd_state)
+{
+ struct v4l2_mbus_framefmt *fmt;
+
+ fmt = v4l2_subdev_get_try_format(subdev, sd_state, 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_state *sd_state,
+ 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, sd_state,
+ 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_state *sd_state,
+ 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, sd_state,
+ 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_state *sd_state,
+ 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_VIDEO, -1);
+ if (ret)
+ return ret;
+
+ dev_info(csi->dev, "Device registered as %s\n",
+ video_device_node_name(vdev));
+
+ return 0;
+}