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Subject: media: v4l2-dev/ioctl: Add V4L2_CAP_IO_MC Author: Niklas Söderlund <[email protected]> Date: Tue Apr 21 15:57:38 2020 +0200 Add a video device capability flag to indicate that its inputs and/or outputs are controlled by the Media Controller instead of the V4L2 API. When this flag is set, ioctl for enum inputs and outputs are automatically enabled and programmed to call a helper function. Suggested-by: Hans Verkuil <[email protected]> Signed-off-by: Helen Koike <[email protected]> Signed-off-by: Niklas Söderlund <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> .../userspace-api/media/v4l/vidioc-querycap.rst | 6 +++ .../userspace-api/media/videodev2.h.rst.exceptions | 1 + drivers/media/v4l2-core/v4l2-dev.c | 25 +++++++--- drivers/media/v4l2-core/v4l2-ioctl.c | 57 ++++++++++++++++++++-- include/uapi/linux/videodev2.h | 2 + 5 files changed, 81 insertions(+), 10 deletions(-) --- diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst index 28e1f766128c..666ac4d42051 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst @@ -264,6 +264,12 @@ specification the ioctl returns an ``EINVAL`` error code. * - ``V4L2_CAP_TOUCH`` - 0x10000000 - This is a touch device. + * - ``V4L2_CAP_IO_MC`` + - 0x20000000 + - There is only one input and/or output seen from userspace. The whole + video topology configuration, including which I/O entity is routed to + the input/output, is configured by userspace via the Media Controller. + See :ref:`media_controller`. * - ``V4L2_CAP_DEVICE_CAPS`` - 0x80000000 - The driver fills the ``device_caps`` field. This capability can diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions index cb6ccf91776e..a625fb90e3a9 100644 --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions @@ -176,6 +176,7 @@ replace define V4L2_CAP_STREAMING device-capabilities replace define V4L2_CAP_META_OUTPUT device-capabilities replace define V4L2_CAP_DEVICE_CAPS device-capabilities replace define V4L2_CAP_TOUCH device-capabilities +replace define V4L2_CAP_IO_MC device-capabilities # V4L2 pix flags replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format` diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index 97b6a3af1361..a593ea0598b5 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -552,6 +552,7 @@ static void determine_valid_ioctls(struct video_device *vdev) (vdev->device_caps & meta_caps); bool is_rx = vdev->vfl_dir != VFL_DIR_TX; bool is_tx = vdev->vfl_dir != VFL_DIR_RX; + bool is_io_mc = vdev->device_caps & V4L2_CAP_IO_MC; bitmap_zero(valid_ioctls, BASE_VIDIOC_PRIVATE); @@ -725,9 +726,15 @@ static void determine_valid_ioctls(struct video_device *vdev) SET_VALID_IOCTL(ops, VIDIOC_G_STD, vidioc_g_std); if (is_rx) { SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd); - SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input); - SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input); - SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input); + if (is_io_mc) { + set_bit(_IOC_NR(VIDIOC_ENUMINPUT), valid_ioctls); + set_bit(_IOC_NR(VIDIOC_G_INPUT), valid_ioctls); + set_bit(_IOC_NR(VIDIOC_S_INPUT), valid_ioctls); + } else { + SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input); + SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input); + SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input); + } SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDIO, vidioc_enumaudio); SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio); SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio); @@ -735,9 +742,15 @@ static void determine_valid_ioctls(struct video_device *vdev) SET_VALID_IOCTL(ops, VIDIOC_S_EDID, vidioc_s_edid); } if (is_tx) { - SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output); - SET_VALID_IOCTL(ops, VIDIOC_G_OUTPUT, vidioc_g_output); - SET_VALID_IOCTL(ops, VIDIOC_S_OUTPUT, vidioc_s_output); + if (is_io_mc) { + set_bit(_IOC_NR(VIDIOC_ENUMOUTPUT), valid_ioctls); + set_bit(_IOC_NR(VIDIOC_G_OUTPUT), valid_ioctls); + set_bit(_IOC_NR(VIDIOC_S_OUTPUT), valid_ioctls); + } else { + SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output); + SET_VALID_IOCTL(ops, VIDIOC_G_OUTPUT, vidioc_g_output); + SET_VALID_IOCTL(ops, VIDIOC_S_OUTPUT, vidioc_s_output); + } SET_VALID_IOCTL(ops, VIDIOC_ENUMAUDOUT, vidioc_enumaudout); SET_VALID_IOCTL(ops, VIDIOC_G_AUDOUT, vidioc_g_audout); SET_VALID_IOCTL(ops, VIDIOC_S_AUDOUT, vidioc_s_audout); diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 833e79a2cb98..665b2bc7b732 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1085,6 +1085,32 @@ static int v4l_querycap(const struct v4l2_ioctl_ops *ops, return ret; } +static int v4l_g_input(const struct v4l2_ioctl_ops *ops, + struct file *file, void *fh, void *arg) +{ + struct video_device *vfd = video_devdata(file); + + if (vfd->device_caps & V4L2_CAP_IO_MC) { + *(int *)arg = 0; + return 0; + } + + return ops->vidioc_g_input(file, fh, arg); +} + +static int v4l_g_output(const struct v4l2_ioctl_ops *ops, + struct file *file, void *fh, void *arg) +{ + struct video_device *vfd = video_devdata(file); + + if (vfd->device_caps & V4L2_CAP_IO_MC) { + *(int *)arg = 0; + return 0; + } + + return ops->vidioc_g_output(file, fh, arg); +} + static int v4l_s_input(const struct v4l2_ioctl_ops *ops, struct file *file, void *fh, void *arg) { @@ -1094,12 +1120,21 @@ static int v4l_s_input(const struct v4l2_ioctl_ops *ops, ret = v4l_enable_media_source(vfd); if (ret) return ret; + + if (vfd->device_caps & V4L2_CAP_IO_MC) + return *(int *)arg ? -EINVAL : 0; + return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); } static int v4l_s_output(const struct v4l2_ioctl_ops *ops, struct file *file, void *fh, void *arg) { + struct video_device *vfd = video_devdata(file); + + if (vfd->device_caps & V4L2_CAP_IO_MC) + return *(int *)arg ? -EINVAL : 0; + return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); } @@ -1143,6 +1178,14 @@ static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, if (is_valid_ioctl(vfd, VIDIOC_S_STD)) p->capabilities |= V4L2_IN_CAP_STD; + if (vfd->device_caps & V4L2_CAP_IO_MC) { + if (p->index) + return -EINVAL; + strscpy(p->name, vfd->name, sizeof(p->name)); + p->type = V4L2_INPUT_TYPE_CAMERA; + return 0; + } + return ops->vidioc_enum_input(file, fh, p); } @@ -1161,6 +1204,14 @@ static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, if (is_valid_ioctl(vfd, VIDIOC_S_STD)) p->capabilities |= V4L2_OUT_CAP_STD; + if (vfd->device_caps & V4L2_CAP_IO_MC) { + if (p->index) + return -EINVAL; + strscpy(p->name, vfd->name, sizeof(p->name)); + p->type = V4L2_OUTPUT_TYPE_ANALOG; + return 0; + } + return ops->vidioc_enum_output(file, fh, p); } @@ -2683,10 +2734,8 @@ DEFINE_V4L_STUB_FUNC(expbuf) DEFINE_V4L_STUB_FUNC(g_std) DEFINE_V4L_STUB_FUNC(g_audio) DEFINE_V4L_STUB_FUNC(s_audio) -DEFINE_V4L_STUB_FUNC(g_input) DEFINE_V4L_STUB_FUNC(g_edid) DEFINE_V4L_STUB_FUNC(s_edid) -DEFINE_V4L_STUB_FUNC(g_output) DEFINE_V4L_STUB_FUNC(g_audout) DEFINE_V4L_STUB_FUNC(s_audout) DEFINE_V4L_STUB_FUNC(g_jpegcomp) @@ -2735,11 +2784,11 @@ static const struct v4l2_ioctl_info v4l2_ioctls[] = { IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), - IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), + IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), - IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), + IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 9817b7e2c968..b18f3f7cde31 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -487,6 +487,8 @@ struct v4l2_capability { #define V4L2_CAP_TOUCH 0x10000000 /* Is a touch device */ +#define V4L2_CAP_IO_MC 0x20000000 /* Is input/output controlled by the media controller */ + #define V4L2_CAP_DEVICE_CAPS 0x80000000 /* sets device capabilities field */ /* _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
