diff options
Diffstat (limited to 'Documentation/userspace-api/media')
14 files changed, 611 insertions, 102 deletions
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst index d5e014ce19b5..1d5248979a6d 100644 --- a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst +++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst @@ -137,6 +137,12 @@ returns the information to the application. The ioctl never fails. - 0x00000100 - If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can be used. + * .. _`CEC-CAP-REPLY-VENDOR-ID`: + + - ``CEC_CAP_REPLY_VENDOR_ID`` + - 0x00000200 + - If this capability is set, then + :ref:`CEC_MSG_FL_REPLY_VENDOR_ID <cec-msg-flags>` can be used. Return Value ============ diff --git a/Documentation/userspace-api/media/cec/cec-ioc-receive.rst b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst index 364938ad34df..3e6c511e054f 100644 --- a/Documentation/userspace-api/media/cec/cec-ioc-receive.rst +++ b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst @@ -232,6 +232,21 @@ View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV'). capability. If that is not set, then the ``EPERM`` error code is returned. + * .. _`CEC-MSG-FL-REPLY-VENDOR-ID`: + + - ``CEC_MSG_FL_REPLY_VENDOR_ID`` + - 4 + - This flag is only available if the ``CEC_CAP_REPLY_VENDOR_ID`` capability + is set. If this flag is set, then the reply is expected to consist of + the ``CEC_MSG_VENDOR_COMMAND_WITH_ID`` opcode followed by the Vendor ID + (in bytes 1-4 of the message), followed by the ``struct cec_msg`` + ``reply`` field. + + Note that this assumes that the byte after the Vendor ID is a + vendor-specific opcode. + + This flag makes it easier to wait for replies to vendor commands. + .. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{10.8cm}| .. _cec-tx-status: diff --git a/Documentation/userspace-api/media/v4l/biblio.rst b/Documentation/userspace-api/media/v4l/biblio.rst index 72aef1759b60..35674eeae20d 100644 --- a/Documentation/userspace-api/media/v4l/biblio.rst +++ b/Documentation/userspace-api/media/v4l/biblio.rst @@ -334,6 +334,17 @@ VESA DMT :author: Video Electronics Standards Association (http://www.vesa.org) +.. _vesaeddc: + +E-DDC +===== + + +:title: VESA Enhanced Display Data Channel (E-DDC) Standard +:subtitle: Version 1.3 + +:author: Video Electronics Standards Association (http://www.vesa.org) + .. _vesaedid: EDID diff --git a/Documentation/userspace-api/media/v4l/buffer.rst b/Documentation/userspace-api/media/v4l/buffer.rst index 52bbee81c080..856874341882 100644 --- a/Documentation/userspace-api/media/v4l/buffer.rst +++ b/Documentation/userspace-api/media/v4l/buffer.rst @@ -694,41 +694,6 @@ enum v4l2_memory - 4 - The buffer is used for :ref:`DMA shared buffer <dmabuf>` I/O. -.. _memory-flags: - -Memory Consistency Flags ------------------------- - -.. raw:: latex - - \small - -.. tabularcolumns:: |p{7.0cm}|p{2.1cm}|p{8.4cm}| - -.. cssclass:: longtable - -.. flat-table:: - :header-rows: 0 - :stub-columns: 0 - :widths: 3 1 4 - - * .. _`V4L2-MEMORY-FLAG-NON-COHERENT`: - - - ``V4L2_MEMORY_FLAG_NON_COHERENT`` - - 0x00000001 - - A buffer is allocated either in coherent (it will be automatically - coherent between the CPU and the bus) or non-coherent memory. The - latter can provide performance gains, for instance the CPU cache - sync/flush operations can be avoided if the buffer is accessed by the - corresponding device only and the CPU does not read/write to/from that - buffer. However, this requires extra care from the driver -- it must - guarantee memory consistency by issuing a cache flush/sync when - consistency is needed. If this flag is set V4L2 will attempt to - allocate the buffer in non-coherent memory. The flag takes effect - only if the buffer is used for :ref:`memory mapping <mmap>` I/O and the - queue reports the :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS - <V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability. - .. raw:: latex \normalsize diff --git a/Documentation/userspace-api/media/v4l/capture.c.rst b/Documentation/userspace-api/media/v4l/capture.c.rst index eef6772967a1..349541b1dac0 100644 --- a/Documentation/userspace-api/media/v4l/capture.c.rst +++ b/Documentation/userspace-api/media/v4l/capture.c.rst @@ -333,7 +333,7 @@ file: media/v4l/capture.c if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { if (EINVAL == errno) { fprintf(stderr, "%s does not support " - "memory mappingn", dev_name); + "memory mapping\n", dev_name); exit(EXIT_FAILURE); } else { errno_exit("VIDIOC_REQBUFS"); @@ -391,7 +391,7 @@ file: media/v4l/capture.c if (-1 == xioctl(fd, VIDIOC_REQBUFS, &req)) { if (EINVAL == errno) { fprintf(stderr, "%s does not support " - "user pointer i/on", dev_name); + "user pointer i/o\n", dev_name); exit(EXIT_FAILURE); } else { errno_exit("VIDIOC_REQBUFS"); @@ -547,7 +547,7 @@ file: media/v4l/capture.c } if (!S_ISCHR(st.st_mode)) { - fprintf(stderr, "%s is no devicen", dev_name); + fprintf(stderr, "%s is no device\n", dev_name); exit(EXIT_FAILURE); } diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst index 22bde00d42df..0da635691fdc 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec-stateless.rst @@ -2993,7 +2993,11 @@ This structure contains all loop filter related parameters. See sections - Applications and drivers must set this to zero. * - __u16 - ``max_frame_width_minus_1`` - - specifies the maximum frame width minus 1 for the frames represented by + - Specifies the maximum frame width minus 1 for the frames represented by + this sequence header. + * - __u16 + - ``max_frame_height_minus_1`` + - Specifies the maximum frame height minus 1 for the frames represented by this sequence header. .. _av1_sequence_flags: @@ -3374,7 +3378,7 @@ semantics" of :ref:`av1`. - ``uv_pri_strength[V4L2_AV1_CDEF_MAX]`` - Specifies the strength of the primary filter. * - __u8 - - ``uv_secondary_strength[V4L2_AV1_CDEF_MAX]`` + - ``uv_sec_strength[V4L2_AV1_CDEF_MAX]`` - Specifies the strength of the secondary filter. .. c:type:: v4l2_av1_segment_feature @@ -3439,7 +3443,7 @@ semantics" of :ref:`av1`. - Bitmask defining which features are enabled in each segment. Use V4L2_AV1_SEGMENT_FEATURE_ENABLED to build a suitable mask. * - __u16 - - `feature_data[V4L2_AV1_MAX_SEGMENTS][V4L2_AV1_SEG_LVL_MAX]`` + - ``feature_data[V4L2_AV1_MAX_SEGMENTS][V4L2_AV1_SEG_LVL_MAX]`` - Data attached to each feature. Data entry is only valid if the feature is enabled. @@ -3490,7 +3494,7 @@ AV1 Loop filter params as defined in section 6.8.10 "Loop filter semantics" of .. tabularcolumns:: |p{1.5cm}|p{5.8cm}|p{10.0cm}| -.. flat-table:: struct v4l2_av1_global_motion +.. flat-table:: struct v4l2_av1_loop_filter :header-rows: 0 :stub-columns: 0 :widths: 1 1 2 @@ -3806,12 +3810,12 @@ AV1 Tx mode as described in section 6.8.21 "TX mode semantics" of :ref:`av1`. * - struct :c:type:`v4l2_av1_quantization` - ``quantization`` - Quantization parameters. - * - struct :c:type:`v4l2_av1_segmentation` - - ``segmentation`` - - Segmentation parameters. * - __u8 - ``superres_denom`` - The denominator for the upscaling ratio. + * - struct :c:type:`v4l2_av1_segmentation` + - ``segmentation`` + - Segmentation parameters. * - struct :c:type:`v4l2_av1_loop_filter` - ``loop_filter`` - Loop filter params @@ -3829,7 +3833,7 @@ AV1 Tx mode as described in section 6.8.21 "TX mode semantics" of :ref:`av1`. * - struct :c:type:`v4l2_av1_loop_restoration` - ``loop_restoration`` - Loop restoration parameters. - * - struct :c:type:`v4l2_av1_loop_global_motion` + * - struct :c:type:`v4l2_av1_global_motion` - ``global_motion`` - Global motion parameters. * - __u32 diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst index b1c2ab2854af..27803dca8d3e 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst @@ -31,7 +31,7 @@ Image Process Control IDs Pixel sampling rate in the device's pixel array. This control is read-only and its unit is pixels / second. - Some devices use horizontal and vertical balanking to configure the frame + Some devices use horizontal and vertical blanking to configure the frame rate. The frame rate can be calculated from the pixel rate, analogue crop rectangle as well as horizontal and vertical blanking. The pixel rate control may be present in a different sub-device than the blanking controls diff --git a/Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst b/Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst index fa04f00bcd2e..959f6bde8695 100644 --- a/Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst +++ b/Documentation/userspace-api/media/v4l/metafmt-rkisp1.rst @@ -1,28 +1,67 @@ .. SPDX-License-Identifier: GPL-2.0 -.. _v4l2-meta-fmt-rk-isp1-params: - .. _v4l2-meta-fmt-rk-isp1-stat-3a: -***************************************************************************** -V4L2_META_FMT_RK_ISP1_PARAMS ('rk1p'), V4L2_META_FMT_RK_ISP1_STAT_3A ('rk1s') -***************************************************************************** +************************************************************************************************************************ +V4L2_META_FMT_RK_ISP1_PARAMS ('rk1p'), V4L2_META_FMT_RK_ISP1_STAT_3A ('rk1s'), V4L2_META_FMT_RK_ISP1_EXT_PARAMS ('rk1e') +************************************************************************************************************************ +======================== Configuration parameters ======================== -The configuration parameters are passed to the +The configuration of the RkISP1 ISP is performed by userspace by providing +parameters for the ISP to the driver using the :c:type:`v4l2_meta_format` +interface. + +There are two methods that allow to configure the ISP, the `fixed parameters` +configuration format and the `extensible parameters` configuration +format. + +.. _v4l2-meta-fmt-rk-isp1-params: + +Fixed parameters configuration format +===================================== + +When using the fixed configuration format, parameters are passed to the :ref:`rkisp1_params <rkisp1_params>` metadata output video node, using -the :c:type:`v4l2_meta_format` interface. The buffer contains -a single instance of the C structure :c:type:`rkisp1_params_cfg` defined in -``rkisp1-config.h``. So the structure can be obtained from the buffer by: +the `V4L2_META_FMT_RK_ISP1_PARAMS` meta format. + +The buffer contains a single instance of the C structure +:c:type:`rkisp1_params_cfg` defined in ``rkisp1-config.h``. So the structure can +be obtained from the buffer by: .. code-block:: c struct rkisp1_params_cfg *params = (struct rkisp1_params_cfg*) buffer; +This method supports a subset of the ISP features only, new applications should +use the extensible parameters method. + +.. _v4l2-meta-fmt-rk-isp1-ext-params: + +Extensible parameters configuration format +========================================== + +When using the extensible configuration format, parameters are passed to the +:ref:`rkisp1_params <rkisp1_params>` metadata output video node, using +the `V4L2_META_FMT_RK_ISP1_EXT_PARAMS` meta format. + +The buffer contains a single instance of the C structure +:c:type:`rkisp1_ext_params_cfg` defined in ``rkisp1-config.h``. The +:c:type:`rkisp1_ext_params_cfg` structure is designed to allow userspace to +populate the data buffer with only the configuration data for the ISP blocks it +intends to configure. The extensible parameters format design allows developers +to define new block types to support new configuration parameters, and defines a +versioning scheme so that it can be extended and versioned without breaking +compatibility with existing applications. + +For these reasons, this configuration method is preferred over the `fixed +parameters` format alternative. + .. rkisp1_stat_buffer +=========================== 3A and histogram statistics =========================== diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg new file mode 100644 index 000000000000..a6e82f2c73df --- /dev/null +++ b/Documentation/userspace-api/media/v4l/mt2110t.svg @@ -0,0 +1,315 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later --> +<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> +<svg version="1.2" width="140mm" 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</g> + </g> + <g class="Group"> + <g class="com.sun.star.drawing.CustomShape"> + <g id="id27"> + <rect class="BoundingBox" stroke="none" fill="none" x="1749" y="19809" width="10003" height="1753"/> + <path fill="none" stroke="rgb(52,101,164)" d="M 6750,21560 L 1750,21560 1750,19810 11750,19810 11750,21560 6750,21560 Z"/> + <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3718" y="20905"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">4 rows of upper 8 bits</tspan></tspan></tspan></text> + </g> + </g> + <g class="com.sun.star.drawing.CustomShape"> + <g id="id28"> + <rect class="BoundingBox" stroke="none" fill="none" x="1749" y="19059" width="10003" height="753"/> + <path fill="none" stroke="rgb(52,101,164)" d="M 6750,19810 L 1750,19810 1750,19060 11750,19060 11750,19810 6750,19810 Z"/> + <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3771" y="19655"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">4 rows of lower 2 bits</tspan></tspan></tspan></text> + </g> + </g> + <g class="com.sun.star.drawing.CustomShape"> + <g id="id29"> + <rect class="BoundingBox" stroke="none" fill="none" x="1709" y="18969" width="10083" height="2583"/> + <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 6750,21510 L 1750,21510 1750,19010 11750,19010 11750,21510 6750,21510 Z"/> + </g> + </g> + </g> + <g class="com.sun.star.drawing.MeasureShape"> + <g id="id30"> + <rect class="BoundingBox" stroke="none" fill="none" x="11849" y="1949" width="1237" height="4987"/> + <path fill="none" stroke="rgb(0,0,0)" d="M 12443,6845 L 12443,4487"/> + <path fill="rgb(0,0,0)" stroke="none" d="M 12443,4200 L 12343,4500 12543,4500 12443,4200 Z"/> + <path fill="none" stroke="rgb(0,0,0)" d="M 12443,2163 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b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst @@ -275,19 +275,6 @@ please make a proposal on the linux-media mailing list. Decoder's implementation can be found here, `aspeed_codec <https://github.com/AspeedTech-BMC/aspeed_codec/>`__ - * .. _V4L2-PIX-FMT-MT2110T: - - - ``V4L2_PIX_FMT_MT2110T`` - - 'MT2110T' - - This format is two-planar 10-Bit tile mode and having similitude with - ``V4L2_PIX_FMT_MM21`` in term of alignment and tiling. Used for VP9, AV1 - and HEVC. - * .. _V4L2-PIX-FMT-MT2110R: - - - ``V4L2_PIX_FMT_MT2110R`` - - 'MT2110R' - - This format is two-planar 10-Bit raster mode and having similitude with - ``V4L2_PIX_FMT_MM21`` in term of alignment and tiling. Used for AVC. * .. _V4L2-PIX-FMT-HEXTILE: - ``V4L2_PIX_FMT_HEXTILE`` diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst index 1840224faa41..b788f6933855 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst @@ -144,6 +144,20 @@ All components are stored with the same number of bits per component. - Cb, Cr - Yes - 4x4 tiles + * - V4L2_PIX_FMT_MT2110T + - 'MT2T' + - 15 + - 4:2:0 + - Cb, Cr + - No + - 16x32 / 16x16 tiles tiled low bits + * - V4L2_PIX_FMT_MT2110R + - 'MT2R' + - 15 + - 4:2:0 + - Cb, Cr + - No + - 16x32 / 16x16 tiles raster low bits * - V4L2_PIX_FMT_NV16 - 'NV16' - 8 @@ -295,8 +309,6 @@ of the luma plane. .. _V4L2-PIX-FMT-NV12-32L32: .. _V4L2-PIX-FMT-NV12M-8L128: .. _V4L2-PIX-FMT-NV12-8L128: -.. _V4L2-PIX-FMT-NV12M-10BE-8L128: -.. _V4L2-PIX-FMT-NV12-10BE-8L128: .. _V4L2-PIX-FMT-MM21: Tiled NV12 @@ -322,6 +334,22 @@ If the vertical resolution is an odd number of tiles, the last row of tiles is stored in linear order. The layouts of the luma and chroma planes are identical. +.. _nv12mt: + +.. kernel-figure:: nv12mt.svg + :alt: nv12mt.svg + :align: center + + V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout + +.. _nv12mt_ex: + +.. kernel-figure:: nv12mt_example.svg + :alt: nv12mt_example.svg + :align: center + + Example V4L2_PIX_FMT_NV12MT memory layout of tiles + ``V4L2_PIX_FMT_NV12_4L4`` stores pixels in 4x4 tiles, and stores tiles linearly in memory. The line stride and image height must be aligned to a multiple of 4. The layouts of the luma and chroma planes are @@ -345,6 +373,27 @@ The layouts of the luma and chroma planes are identical. ``V4L2_PIX_FMT_NV12_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_8L128`` but stores two planes in one memory. +``V4L2_PIX_FMT_MM21`` store luma pixel in 16x32 tiles, and chroma pixels +in 16x16 tiles. The line stride must be aligned to a multiple of 16 and the +image height must be aligned to a multiple of 32. The number of luma and chroma +tiles are identical, even though the tile size differ. The image is formed of +two non-contiguous planes. + + +.. _V4L2-PIX-FMT-NV15-4L4: +.. _V4L2-PIX-FMT-NV12M-10BE-8L128: +.. _V4L2-PIX-FMT-NV12-10BE-8L128: +.. _V4L2-PIX-FMT-MT2110T: +.. _V4L2-PIX-FMT-MT2110R: + +Tiled NV15 +---------- + +``V4L2_PIX_FMT_NV15_4L4`` Semi-planar 10-bit YUV 4:2:0 formats, using 4x4 tiling. +All components are packed without any padding between each other. +As a side-effect, each group of 4 components are stored over 5 bytes +(YYYY or UVUV = 4 * 10 bits = 40 bits = 5 bytes). + ``V4L2_PIX_FMT_NV12M_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores 10 bits pixels in 2D 8x128 tiles, and stores tiles linearly in memory. the data is arranged in big endian order. @@ -363,37 +412,119 @@ byte 4: Y3(bits 7-0) ``V4L2_PIX_FMT_NV12_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_10BE_8L128`` but stores two planes in one memory. -``V4L2_PIX_FMT_MM21`` store luma pixel in 16x32 tiles, and chroma pixels -in 16x16 tiles. The line stride must be aligned to a multiple of 16 and the -image height must be aligned to a multiple of 32. The number of luma and chroma -tiles are identical, even though the tile size differ. The image is formed of -two non-contiguous planes. - -.. _nv12mt: +``V4L2_PIX_FMT_MT2110T`` is one of Mediatek packed 10bit YUV 4:2:0 formats. +It is fully packed 10bit 4:2:0 format like NV15 (15 bits per pixel), except +that the lower two bits data is stored in separate partitions. The format is +composed of 16x32 luma tiles, and 16x16 chroma tiles. Each tiles is 640 bytes +long, divided into 8 partitions of 80 bytes. The first 16 bytes of the +partition represent the 2 least significant bits of pixel data. The remaining +64 bytes represent the 8 most significant bits of pixel data. -.. kernel-figure:: nv12mt.svg - :alt: nv12mt.svg +.. kernel-figure:: mt2110t.svg + :alt: mt2110t.svg :align: center - V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout - -.. _nv12mt_ex: + Layout of MT2110T Chroma Tile -.. kernel-figure:: nv12mt_example.svg - :alt: nv12mt_example.svg - :align: center +Filtering out the upper part of each partitions results in a valid +``V4L2_PIX_FMT_MM21`` frame. A partition is a sub-tile of size 16 x 4. The +lower two bits is said to be tiled since each bytes contains the lower two +bits of the column of for pixel matching the same index. The chroma tiles +only have 4 partitions. - Example V4L2_PIX_FMT_NV12MT memory layout of tiles +.. flat-table:: MT2110T LSB bits layout + :header-rows: 1 + :stub-columns: 1 -.. _V4L2-PIX-FMT-NV15-4L4: + * - + - start + 0: + - start + 1: + - . . . + - start\ +\ 15: + * - Bits 1:0 + - Y'\ :sub:`0:0` + - Y'\ :sub:`0:1` + - . . . + - Y'\ :sub:`0:15` + * - Bit 3:2 + - Y'\ :sub:`1:0` + - Y'\ :sub:`1:1` + - . . . + - Y'\ :sub:`1:15` + * - Bits 5:4 + - Y'\ :sub:`2:0` + - Y'\ :sub:`2:1` + - . . . + - Y'\ :sub:`2:15` + * - Bits 7:6 + - Y'\ :sub:`3:0` + - Y'\ :sub:`3:1` + - . . . + - Y'\ :sub:`3:15` + +``V4L2_PIX_FMT_MT2110R`` is identical to ``V4L2_PIX_FMT_MT2110T`` except that +the least significant two bits layout is in raster order. This means the first byte +contains 4 pixels of the first row, with 4 bytes per line. + +.. flat-table:: MT2110R LSB bits layout + :header-rows: 2 + :stub-columns: 1 -Tiled NV15 ----------- + * - + - :cspan:`3` Byte 0 + - ... + - :cspan:`3` Byte 3 + * - + - 7:6 + - 5:4 + - 3:2 + - 1:0 + - ... + - 7:6 + - 5:4 + - 3:2 + - 1:0 + * - start + 0: + - Y'\ :sub:`0:3` + - Y'\ :sub:`0:2` + - Y'\ :sub:`0:1` + - Y'\ :sub:`0:0` + - ... + - Y'\ :sub:`0:15` + - Y'\ :sub:`0:14` + - Y'\ :sub:`0:13` + - Y'\ :sub:`0:12` + * - start + 4: + - Y'\ :sub:`1:3` + - Y'\ :sub:`1:2` + - Y'\ :sub:`1:1` + - Y'\ :sub:`1:0` + - ... + - Y'\ :sub:`1:15` + - Y'\ :sub:`1:14` + - Y'\ :sub:`1:13` + - Y'\ :sub:`1:12` + * - start + 8: + - Y'\ :sub:`2:3` + - Y'\ :sub:`2:2` + - Y'\ :sub:`2:1` + - Y'\ :sub:`2:0` + - ... + - Y'\ :sub:`2:15` + - Y'\ :sub:`2:14` + - Y'\ :sub:`2:13` + - Y'\ :sub:`2:12` + * - start\ +\ 12: + - Y'\ :sub:`3:3` + - Y'\ :sub:`3:2` + - Y'\ :sub:`3:1` + - Y'\ :sub:`3:0` + - ... + - Y'\ :sub:`3:15` + - Y'\ :sub:`3:14` + - Y'\ :sub:`3:13` + - Y'\ :sub:`3:12` -Semi-planar 10-bit YUV 4:2:0 formats, using 4x4 tiling. -All components are packed without any padding between each other. -As a side-effect, each group of 4 components are stored over 5 bytes -(YYYY or UVUV = 4 * 10 bits = 40 bits = 5 bytes). .. _V4L2-PIX-FMT-NV16: .. _V4L2-PIX-FMT-NV61: diff --git a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst index 6c57b8428356..3d11d86d9cbf 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-querycap.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-querycap.rst @@ -244,6 +244,17 @@ specification the ioctl returns an ``EINVAL`` error code. - 0x01000000 - The device supports the :c:func:`read()` and/or :c:func:`write()` I/O methods. + * - ``V4L2_CAP_EDID`` + - 0x02000000 + - The device stores the EDID for a video input, or retrieves the EDID for a video + output. It is a standalone EDID device, so no video streaming etc. will take place. + + For a video input this is typically an eeprom that supports the + :ref:`VESA Enhanced Display Data Channel Standard <vesaeddc>`. It can be something + else as well, for example a micro controller. + + For a video output this is typically read from an external device such as an + HDMI splitter accessed by a serial port. * - ``V4L2_CAP_STREAMING`` - 0x04000000 - The device supports the :ref:`streaming <mmap>` I/O method. diff --git a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst index bbc22dd76032..daf9a6621b50 100644 --- a/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst +++ b/Documentation/userspace-api/media/v4l/vidioc-reqbufs.rst @@ -73,6 +73,8 @@ aborting or finishing any DMA in progress, an implicit .. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}| +.. cssclass:: longtable + .. flat-table:: struct v4l2_requestbuffers :header-rows: 0 :stub-columns: 0 @@ -123,14 +125,6 @@ aborting or finishing any DMA in progress, an implicit .. _V4L2-BUF-CAP-SUPPORTS-MAX-NUM-BUFFERS: .. _V4L2-BUF-CAP-SUPPORTS-REMOVE-BUFS: -.. raw:: latex - - \footnotesize - -.. tabularcolumns:: |p{8.1cm}|p{2.2cm}|p{7.0cm}| - -.. cssclass:: longtable - .. flat-table:: V4L2 Buffer Capabilities Flags :header-rows: 0 :stub-columns: 0 @@ -166,6 +160,36 @@ aborting or finishing any DMA in progress, an implicit :ref:`V4L2_BUF_FLAG_NO_CACHE_INVALIDATE <V4L2-BUF-FLAG-NO-CACHE-INVALIDATE>`, :ref:`V4L2_BUF_FLAG_NO_CACHE_CLEAN <V4L2-BUF-FLAG-NO-CACHE-CLEAN>` and :ref:`V4L2_MEMORY_FLAG_NON_COHERENT <V4L2-MEMORY-FLAG-NON-COHERENT>`. + * - ``V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS`` + - 0x00000080 + - If set, then the ``max_num_buffers`` field in ``struct v4l2_create_buffers`` + is valid. If not set, then the maximum is ``VIDEO_MAX_FRAME`` buffers. + * - ``V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS`` + - 0x00000100 + - If set, then ``VIDIOC_REMOVE_BUFS`` is supported. + +.. _memory-flags: +.. _V4L2-MEMORY-FLAG-NON-COHERENT: + +.. flat-table:: Memory Consistency Flags + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * - ``V4L2_MEMORY_FLAG_NON_COHERENT`` + - 0x00000001 + - A buffer is allocated either in coherent (it will be automatically + coherent between the CPU and the bus) or non-coherent memory. The + latter can provide performance gains, for instance the CPU cache + sync/flush operations can be avoided if the buffer is accessed by the + corresponding device only and the CPU does not read/write to/from that + buffer. However, this requires extra care from the driver -- it must + guarantee memory consistency by issuing a cache flush/sync when + consistency is needed. If this flag is set V4L2 will attempt to + allocate the buffer in non-coherent memory. The flag takes effect + only if the buffer is used for :ref:`memory mapping <mmap>` I/O and the + queue reports the :ref:`V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS + <V4L2-BUF-CAP-SUPPORTS-MMAP-CACHE-HINTS>` capability. .. raw:: latex diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions index bdc628e8c1d6..d67fd4038d22 100644 --- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions +++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions @@ -197,6 +197,7 @@ 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 +replace define V4L2_CAP_EDID device-capabilities # V4L2 pix flags replace define V4L2_PIX_FMT_PRIV_MAGIC :c:type:`v4l2_pix_format` |
