[PATCH 1/5] docs: uapi: media: Properly locate NV12MT diagram

[PATCH 1/5] docs: uapi: media: Properly locate NV12MT diagram

[Nicolas Dufresne]

The diagram have been pushed back at the end of a list of unrelated
pixels formats. Move it back next its related pixel format.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../media/v4l/pixfmt-yuv-planar.rst           | 32 +++++++++----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index 1840224faa41..fb826923ff1d 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
@@ -322,6 +322,22 @@ 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
@@ -369,22 +385,6 @@ 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:
-
-.. 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-NV15-4L4:
 
 Tiled NV15
-- 
2.40.1

Re: [PATCH 1/5] docs: uapi: media: Properly locate NV12MT diagram

[Andrzej Pietrasiewicz]

W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> The diagram have been pushed back at the end of a list of unrelated
> pixels formats. Move it back next its related pixel format.
> 
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>

Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>

> ---
>   .../media/v4l/pixfmt-yuv-planar.rst           | 32 +++++++++----------
>   1 file changed, 16 insertions(+), 16 deletions(-)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 1840224faa41..fb826923ff1d 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -322,6 +322,22 @@ 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
> @@ -369,22 +385,6 @@ 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:
> -
> -.. 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-NV15-4L4:
>   
>   Tiled NV15

[PATCH 2/5] docs: uapi: media: Move NV12_10BE_8L128 to NV15 section

[Nicolas Dufresne]

This is a 15 bits per pixel (or packed 10 bit format), so move it
into the relevant section.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../media/v4l/pixfmt-yuv-planar.rst           | 36 ++++++++++---------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index fb826923ff1d..1d43532095c0 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
@@ -295,8 +295,6 @@ 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
@@ -361,6 +359,25 @@ 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:
+
+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.
@@ -379,21 +396,6 @@ 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.
-
-.. _V4L2-PIX-FMT-NV15-4L4:
-
-Tiled NV15
-----------
-
-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:
-- 
2.40.1

Re: [PATCH 2/5] docs: uapi: media: Move NV12_10BE_8L128 to NV15 section

[Andrzej Pietrasiewicz]

W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> This is a 15 bits per pixel (or packed 10 bit format), so move it
> into the relevant section.
> 
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>

Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>

> ---
>   .../media/v4l/pixfmt-yuv-planar.rst           | 36 ++++++++++---------
>   1 file changed, 19 insertions(+), 17 deletions(-)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index fb826923ff1d..1d43532095c0 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -295,8 +295,6 @@ 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
> @@ -361,6 +359,25 @@ 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:
> +
> +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.
> @@ -379,21 +396,6 @@ 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.
> -
> -.. _V4L2-PIX-FMT-NV15-4L4:
> -
> -Tiled NV15
> -----------
> -
> -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:

[PATCH 3/5] docs: uapi: media: Add common documentation of tiled NV15

[Nicolas Dufresne]

This way we don't have to repeat over and over how the pixels are
packed in NV15.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../media/v4l/pixfmt-yuv-planar.rst           | 79 ++++++++++++++++---
 1 file changed, 68 insertions(+), 11 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index 1d43532095c0..052927bd9396 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
@@ -373,10 +373,74 @@ two non-contiguous planes.
 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).
+Semi-planar 10-bit YUV 4:2:0 formats. All components are packed
+without any padding between each other. Each pixels occupy 15 bits
+and are usually stored in group of 4 components stored over 5 bytes
+(YYYY or UVUV = 4 * 10 bits = 40 bits = 5 bytes) or partitioned into
+upper 8 bit and lower 2 bits.
+
+.. flat-table:: Sample of 4 NV15 luma pixels
+    :header-rows:  2
+    :stub-columns: 0
+
+    * -
+      - 8
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * - byte 0
+      - Y'\ :sub:`0:0`
+      - Y'\ :sub:`0:1`
+      - Y'\ :sub:`0:2`
+      - Y'\ :sub:`0:3`
+      - Y'\ :sub:`0:4`
+      - Y'\ :sub:`0:5`
+      - Y'\ :sub:`0:6`
+      - Y'\ :sub:`0:7`
+    * - byte 1
+      - Y'\ :sub:`0:8`
+      - Y'\ :sub:`0:9`
+      - Y'\ :sub:`1:0`
+      - Y'\ :sub:`1:1`
+      - Y'\ :sub:`1:2`
+      - Y'\ :sub:`1:3`
+      - Y'\ :sub:`1:4`
+      - Y'\ :sub:`1:5`
+    * - byte 2
+      - Y'\ :sub:`1:6`
+      - Y'\ :sub:`1:7`
+      - Y'\ :sub:`1:8`
+      - Y'\ :sub:`1:9`
+      - Y'\ :sub:`2:0`
+      - Y'\ :sub:`2:1`
+      - Y'\ :sub:`2:2`
+      - Y'\ :sub:`2:3`
+    * - byte 3
+      - Y'\ :sub:`2:4`
+      - Y'\ :sub:`2:5`
+      - Y'\ :sub:`2:6`
+      - Y'\ :sub:`2:7`
+      - Y'\ :sub:`2:8`
+      - Y'\ :sub:`2:9`
+      - Y'\ :sub:`3:0`
+      - Y'\ :sub:`3:1`
+    * - byte 4
+      - Y'\ :sub:`3:2`
+      - Y'\ :sub:`3:3`
+      - Y'\ :sub:`3:4`
+      - Y'\ :sub:`3:5`
+      - Y'\ :sub:`3:6`
+      - Y'\ :sub:`3:7`
+      - Y'\ :sub:`3:8`
+      - Y'\ :sub:`3:9`
+
+``V4L2_PIX_FMT_NV15_4L4`` stores pixels in 4x4 tiles, and stores tiles linearly
+in memory.
 
 ``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.
@@ -385,13 +449,6 @@ The image height must be aligned to a multiple of 128.
 The layouts of the luma and chroma planes are identical.
 Note the tile size is 8bytes multiplied by 128 bytes,
 it means that the low bits and high bits of one pixel may be in different tiles.
-The 10 bit pixels are packed, so 5 bytes contain 4 10-bit pixels layout like
-this (for luma):
-byte 0: Y0(bits 9-2)
-byte 1: Y0(bits 1-0) Y1(bits 9-4)
-byte 2: Y1(bits 3-0) Y2(bits 9-6)
-byte 3: Y2(bits 5-0) Y3(bits 9-8)
-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.
-- 
2.40.1

Re: [PATCH 3/5] docs: uapi: media: Add common documentation of tiled NV15

[Andrzej Pietrasiewicz]

Hi Nicolas,

W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> This way we don't have to repeat over and over how the pixels are
> packed in NV15.
> 
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> ---
>   .../media/v4l/pixfmt-yuv-planar.rst           | 79 ++++++++++++++++---
>   1 file changed, 68 insertions(+), 11 deletions(-)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 1d43532095c0..052927bd9396 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> @@ -373,10 +373,74 @@ two non-contiguous planes.
>   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).
> +Semi-planar 10-bit YUV 4:2:0 formats. All components are packed
> +without any padding between each other. Each pixels occupy 15 bits

Maybe "Each pixel group"?



> +and are usually stored in group of 4 components stored over 5 bytes
> +(YYYY or UVUV = 4 * 10 bits = 40 bits = 5 bytes) or partitioned into
> +upper 8 bit and lower 2 bits.
> +
> +.. flat-table:: Sample of 4 NV15 luma pixels
> +    :header-rows:  2
> +    :stub-columns: 0
> +
> +    * -
> +      - 8
> +      - 7
> +      - 6
> +      - 5
> +      - 4
> +      - 3
> +      - 2
> +      - 1
> +      - 0
> +    * - byte 0
> +      - Y'\ :sub:`0:0`
> +      - Y'\ :sub:`0:1`
> +      - Y'\ :sub:`0:2`
> +      - Y'\ :sub:`0:3`
> +      - Y'\ :sub:`0:4`
> +      - Y'\ :sub:`0:5`
> +      - Y'\ :sub:`0:6`
> +      - Y'\ :sub:`0:7`

So byte 0 contains Y0, bits 0..7 but then...

> +    * - byte 1
> +      - Y'\ :sub:`0:8`
> +      - Y'\ :sub:`0:9`
> +      - Y'\ :sub:`1:0`
> +      - Y'\ :sub:`1:1`
> +      - Y'\ :sub:`1:2`
> +      - Y'\ :sub:`1:3`
> +      - Y'\ :sub:`1:4`
> +      - Y'\ :sub:`1:5`
> +    * - byte 2
> +      - Y'\ :sub:`1:6`
> +      - Y'\ :sub:`1:7`
> +      - Y'\ :sub:`1:8`
> +      - Y'\ :sub:`1:9`
> +      - Y'\ :sub:`2:0`
> +      - Y'\ :sub:`2:1`
> +      - Y'\ :sub:`2:2`
> +      - Y'\ :sub:`2:3`
> +    * - byte 3
> +      - Y'\ :sub:`2:4`
> +      - Y'\ :sub:`2:5`
> +      - Y'\ :sub:`2:6`
> +      - Y'\ :sub:`2:7`
> +      - Y'\ :sub:`2:8`
> +      - Y'\ :sub:`2:9`
> +      - Y'\ :sub:`3:0`
> +      - Y'\ :sub:`3:1`
> +    * - byte 4
> +      - Y'\ :sub:`3:2`
> +      - Y'\ :sub:`3:3`
> +      - Y'\ :sub:`3:4`
> +      - Y'\ :sub:`3:5`
> +      - Y'\ :sub:`3:6`
> +      - Y'\ :sub:`3:7`
> +      - Y'\ :sub:`3:8`
> +      - Y'\ :sub:`3:9`
> +
> +``V4L2_PIX_FMT_NV15_4L4`` stores pixels in 4x4 tiles, and stores tiles linearly
> +in memory.
>   
>   ``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.
> @@ -385,13 +449,6 @@ The image height must be aligned to a multiple of 128.
>   The layouts of the luma and chroma planes are identical.
>   Note the tile size is 8bytes multiplied by 128 bytes,
>   it means that the low bits and high bits of one pixel may be in different tiles.
> -The 10 bit pixels are packed, so 5 bytes contain 4 10-bit pixels layout like
> -this (for luma):
> -byte 0: Y0(bits 9-2)

...here it says byts 9-2? Is it a mistake or are you cleaning up the doc
and the table above is the correct version?

Regards,

Andrzej

> -byte 1: Y0(bits 1-0) Y1(bits 9-4)
> -byte 2: Y1(bits 3-0) Y2(bits 9-6)
> -byte 3: Y2(bits 5-0) Y3(bits 9-8)
> -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.

Re: [PATCH 3/5] docs: uapi: media: Add common documentation of tiled NV15

[Nicolas Dufresne]

Le lundi 07 août 2023 à 13:37 +0200, Andrzej Pietrasiewicz a écrit :
> Hi Nicolas,
> 
> W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> > This way we don't have to repeat over and over how the pixels are
> > packed in NV15.
> > 
> > Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> > ---
> >   .../media/v4l/pixfmt-yuv-planar.rst           | 79 ++++++++++++++++---
> >   1 file changed, 68 insertions(+), 11 deletions(-)
> > 
> > diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> > index 1d43532095c0..052927bd9396 100644
> > --- a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> > +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> > @@ -373,10 +373,74 @@ two non-contiguous planes.
> >   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).
> > +Semi-planar 10-bit YUV 4:2:0 formats. All components are packed
> > +without any padding between each other. Each pixels occupy 15 bits
> 
> Maybe "Each pixel group"?

ack.

> 
> 
> 
> > +and are usually stored in group of 4 components stored over 5 bytes
> > +(YYYY or UVUV = 4 * 10 bits = 40 bits = 5 bytes) or partitioned into
> > +upper 8 bit and lower 2 bits.
> > +
> > +.. flat-table:: Sample of 4 NV15 luma pixels
> > +    :header-rows:  2
> > +    :stub-columns: 0
> > +
> > +    * -
> > +      - 8
> > +      - 7
> > +      - 6
> > +      - 5
> > +      - 4
> > +      - 3
> > +      - 2
> > +      - 1
> > +      - 0
> > +    * - byte 0
> > +      - Y'\ :sub:`0:0`
> > +      - Y'\ :sub:`0:1`
> > +      - Y'\ :sub:`0:2`
> > +      - Y'\ :sub:`0:3`
> > +      - Y'\ :sub:`0:4`
> > +      - Y'\ :sub:`0:5`
> > +      - Y'\ :sub:`0:6`
> > +      - Y'\ :sub:`0:7`
> 
> So byte 0 contains Y0, bits 0..7 but then...
> 
> > +    * - byte 1
> > +      - Y'\ :sub:`0:8`
> > +      - Y'\ :sub:`0:9`
> > +      - Y'\ :sub:`1:0`
> > +      - Y'\ :sub:`1:1`
> > +      - Y'\ :sub:`1:2`
> > +      - Y'\ :sub:`1:3`
> > +      - Y'\ :sub:`1:4`
> > +      - Y'\ :sub:`1:5`
> > +    * - byte 2
> > +      - Y'\ :sub:`1:6`
> > +      - Y'\ :sub:`1:7`
> > +      - Y'\ :sub:`1:8`
> > +      - Y'\ :sub:`1:9`
> > +      - Y'\ :sub:`2:0`
> > +      - Y'\ :sub:`2:1`
> > +      - Y'\ :sub:`2:2`
> > +      - Y'\ :sub:`2:3`
> > +    * - byte 3
> > +      - Y'\ :sub:`2:4`
> > +      - Y'\ :sub:`2:5`
> > +      - Y'\ :sub:`2:6`
> > +      - Y'\ :sub:`2:7`
> > +      - Y'\ :sub:`2:8`
> > +      - Y'\ :sub:`2:9`
> > +      - Y'\ :sub:`3:0`
> > +      - Y'\ :sub:`3:1`
> > +    * - byte 4
> > +      - Y'\ :sub:`3:2`
> > +      - Y'\ :sub:`3:3`
> > +      - Y'\ :sub:`3:4`
> > +      - Y'\ :sub:`3:5`
> > +      - Y'\ :sub:`3:6`
> > +      - Y'\ :sub:`3:7`
> > +      - Y'\ :sub:`3:8`
> > +      - Y'\ :sub:`3:9`
> > +
> > +``V4L2_PIX_FMT_NV15_4L4`` stores pixels in 4x4 tiles, and stores tiles linearly
> > +in memory.
> >   
> >   ``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.
> > @@ -385,13 +449,6 @@ The image height must be aligned to a multiple of 128.
> >   The layouts of the luma and chroma planes are identical.
> >   Note the tile size is 8bytes multiplied by 128 bytes,
> >   it means that the low bits and high bits of one pixel may be in different tiles.
> > -The 10 bit pixels are packed, so 5 bytes contain 4 10-bit pixels layout like
> > -this (for luma):
> > -byte 0: Y0(bits 9-2)
> 
> ...here it says byts 9-2? Is it a mistake or are you cleaning up the doc
> and the table above is the correct version?

Thanks a lot for spotting. I did miss the endianess aspect and just assumed all
NV15 implementation was the same. So digging further, Hantro/RK version of NV15
is  using a little endian representation form. So you have in memory:

Byte 0: Y0 bits 7-0
Byte 1: Y1 bits 5-0 in MSB | Y0 bits 9-8 in LSB
Byte 3: Y2 bits 3-0 in MSB | Y1 bits 9-6 in LSB
Byte 4: Y3 bits 1-0 in MSB | Y2 bits 9-4 in LSB
Byte 5: Y3 bits 9-2

If we represent the reads in 16bits words (as an illustration), you'd read Y0
with:

Y0: 0x[Byte 1][Byte 0] & 0x3ff
Y1: 0x[Byte 2][Byte 1] >> 2 & 0x3ff
Y2: 0x[Byte 3][Byte 2] >> 4 & 0x3ff
Y3: 0x[Byte 4][Byte 3] >> 6

Which makes the 10 bits of data always adjacent (of course not that practical
for a CPU since its unaligned, but let's not bother ;-P). 

I can see now that Amphion is big endian, as the bytes get pushed into the MSB.
So with the originally documented bit placement we'd have:

Y0: 0x[Byte 0][Byte 1] >> 6
Y1: 0x[Byte 1][Byte 2] >> 4 & 0x3ff
Y2: 0x[Byte 2][Byte 3] >> 2 & 0x3ff
Y3: 0x[Byte 3][Byte 4] & 0x3ff
 
I'll drop the generalization here, and only introduce NV15 family as fully
packed 10 bit semi-planar formats, which often stores 4 pixel per 5 bytes, but
may partition lower bits (aka MT2110).

> 
> Regards,
> 
> Andrzej
> 
> > -byte 1: Y0(bits 1-0) Y1(bits 9-4)
> > -byte 2: Y1(bits 3-0) Y2(bits 9-6)
> > -byte 3: Y2(bits 5-0) Y3(bits 9-8)
> > -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.
> 

[PATCH 4/5] docs: uapi: media: Add a layout diagram for MT2110T

[Nicolas Dufresne]

This diagram details the partitioning done in each tiles.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../userspace-api/media/v4l/mt2110t.svg       | 268 ++++++++++++++++++
 1 file changed, 268 insertions(+)
 create mode 100644 Documentation/userspace-api/media/v4l/mt2110t.svg

diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg
new file mode 100644
index 000000000000..d4fc223f5fde
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-- 
2.40.1

Re: [PATCH 4/5] docs: uapi: media: Add a layout diagram for MT2110T

[Andrzej Pietrasiewicz]

Hi Nicolas,

W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> This diagram details the partitioning done in each tiles.

If I understand correctly there are 8 partitions in the diagram, each partition 
consists of 80 bytes, 64 bytes containing MSB data and 16 bytes containing LSB
data. The diagram says "MSB 8 bits" and "LSB 2 bits" which might be confusing
because it suggests that the length of the partitions is maybe 8 bits plus 2
bits. IOW it is not clear that the numbers (8 and 2) refer to the kind of 
contents rather than lengths. Maybe to the left of the diagram should be some 
arrows/curly braces describing the partitions' lengths?

Regards,

Andrzej

> 
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> ---
>   .../userspace-api/media/v4l/mt2110t.svg       | 268 ++++++++++++++++++
>   1 file changed, 268 insertions(+)
>   create mode 100644 Documentation/userspace-api/media/v4l/mt2110t.svg
> 
> diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg
> new file mode 100644
> index 000000000000..d4fc223f5fde
> --- /dev/null
> +++ b/Documentation/userspace-api/media/v4l/mt2110t.svg
> @@ -0,0 +1,268 @@
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Re: [PATCH 4/5] docs: uapi: media: Add a layout diagram for MT2110T

[Nicolas Dufresne]

Le lundi 07 août 2023 à 20:40 +0200, Andrzej Pietrasiewicz a écrit :
> Hi Nicolas,
> 
> W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> > This diagram details the partitioning done in each tiles.
> 
> If I understand correctly there are 8 partitions in the diagram, each partition 
> consists of 80 bytes, 64 bytes containing MSB data and 16 bytes containing LSB
> data. The diagram says "MSB 8 bits" and "LSB 2 bits" which might be confusing
> because it suggests that the length of the partitions is maybe 8 bits plus 2
> bits. IOW it is not clear that the numbers (8 and 2) refer to the kind of 
> contents rather than lengths. Maybe to the left of the diagram should be some 
> arrows/curly braces describing the partitions' lengths?

You mean you'd add the partition height (4) in pixels ? Note, I'm thinking of
using "8 MSB of pixel data", as it seem to translate to a better english "8 most
significant bits of pixel data". I'm trying to avoid replacing the text, it only
meant to be a visual support. An alternative, is really to leave the details in
the text, and label it "MSB of pixel data" and "LSB of pixel data". Any
preference ?

Nicolas

> 
> Regards,
> 
> Andrzej
> 
> > 
> > Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> > ---
> >   .../userspace-api/media/v4l/mt2110t.svg       | 268 ++++++++++++++++++
> >   1 file changed, 268 insertions(+)
> >   create mode 100644 Documentation/userspace-api/media/v4l/mt2110t.svg
> > 
> > diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg
> > new file mode 100644
> > index 000000000000..d4fc223f5fde
> > --- /dev/null
> > +++ b/Documentation/userspace-api/media/v4l/mt2110t.svg
> > @@ -0,0 +1,268 @@
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> 

Re: [PATCH 4/5] docs: uapi: media: Add a layout diagram for MT2110T

[Nicolas Dufresne]

Le lundi 07 août 2023 à 15:29 -0400, Nicolas Dufresne a écrit :
> Le lundi 07 août 2023 à 20:40 +0200, Andrzej Pietrasiewicz a écrit :
> > Hi Nicolas,
> > 
> > W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> > > This diagram details the partitioning done in each tiles.
> > 
> > If I understand correctly there are 8 partitions in the diagram, each partition 
> > consists of 80 bytes, 64 bytes containing MSB data and 16 bytes containing LSB
> > data. The diagram says "MSB 8 bits" and "LSB 2 bits" which might be confusing
> > because it suggests that the length of the partitions is maybe 8 bits plus 2
> > bits. IOW it is not clear that the numbers (8 and 2) refer to the kind of 
> > contents rather than lengths. Maybe to the left of the diagram should be some 
> > arrows/curly braces describing the partitions' lengths?
> 
> You mean you'd add the partition height (4) in pixels ? Note, I'm thinking of
> using "8 MSB of pixel data", as it seem to translate to a better english "8 most
> significant bits of pixel data". I'm trying to avoid replacing the text, it only
> meant to be a visual support. An alternative, is really to leave the details in
> the text, and label it "MSB of pixel data" and "LSB of pixel data". Any
> preference ?

Turns out I have also versed the low and high bit order in the doc, will fix
that in next revision. The low bits partition come first.

> 
> Nicolas
> 
> > 
> > Regards,
> > 
> > Andrzej
> > 
> > > 
> > > Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> > > ---
> > >   .../userspace-api/media/v4l/mt2110t.svg       | 268 ++++++++++++++++++
> > >   1 file changed, 268 insertions(+)
> > >   create mode 100644 Documentation/userspace-api/media/v4l/mt2110t.svg
> > > 
> > > diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg
> > > new file mode 100644
> > > index 000000000000..d4fc223f5fde
> > > --- /dev/null
> > > +++ b/Documentation/userspace-api/media/v4l/mt2110t.svg
> > > @@ -0,0 +1,268 @@
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> 

Re: [PATCH 4/5] docs: uapi: media: Add a layout diagram for MT2110T

[Andrzej Pietrasiewicz]

Hi,

W dniu 7.08.2023 o 21:29, Nicolas Dufresne pisze:
> Le lundi 07 août 2023 à 20:40 +0200, Andrzej Pietrasiewicz a écrit :
>> Hi Nicolas,
>>
>> W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
>>> This diagram details the partitioning done in each tiles.
>>
>> If I understand correctly there are 8 partitions in the diagram, each partition
>> consists of 80 bytes, 64 bytes containing MSB data and 16 bytes containing LSB
>> data. The diagram says "MSB 8 bits" and "LSB 2 bits" which might be confusing
>> because it suggests that the length of the partitions is maybe 8 bits plus 2
>> bits. IOW it is not clear that the numbers (8 and 2) refer to the kind of
>> contents rather than lengths. Maybe to the left of the diagram should be some
>> arrows/curly braces describing the partitions' lengths?
> 
> You mean you'd add the partition height (4) in pixels ? Note, I'm thinking of

I thought of the partition size in bytes.


> using "8 MSB of pixel data", as it seem to translate to a better english "8 most
> significant bits of pixel data".

"8 most significant bits of each pixel data"?

Maybe it's just me, but when I see "8 MSB" I imagine exactly 8 bytes, whereas
this partition chunk is probably 64 bytes long and the following one is 16 bytes
long (and not 2). That is why I would imagine partition sizes to the left of the
diagram - so that it is clear which number is partition length and which numbers
are NOT lengths (8 and 2) but description of each partition contents.

Regards,

Andrzej

I'm trying to avoid replacing the text, it only
> meant to be a visual support. An alternative, is really to leave the details in
> the text, and label it "MSB of pixel data" and "LSB of pixel data". Any
> preference ?
> 
> Nicolas
> 
>>
>> Regards,
>>
>> Andrzej
>>
>>>
>>> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
>>> ---
>>>    .../userspace-api/media/v4l/mt2110t.svg       | 268 ++++++++++++++++++
>>>    1 file changed, 268 insertions(+)
>>>    create mode 100644 Documentation/userspace-api/media/v4l/mt2110t.svg
>>>
>>> diff --git a/Documentation/userspace-api/media/v4l/mt2110t.svg b/Documentation/userspace-api/media/v4l/mt2110t.svg
>>> new file mode 100644
>>> index 000000000000..d4fc223f5fde
>>> --- /dev/null
>>> +++ b/Documentation/userspace-api/media/v4l/mt2110t.svg
>>> @@ -0,0 +1,268 @@
>>> +<?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="110mm" height="215mm" viewBox="0 0 11000 21500" preserveAspectRatio="xMidYMid" fill-rule="evenodd" stroke-width="28.222" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg" xmlns:ooo="http://xml.openoffice.org/svg/export" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:presentation="http://sun.com/xmlns/staroffice/presentation" xmlns:smil="http://www.w3.org/2001/SMIL20/" xmlns:anim="urn:oasis:names:tc:opendocument:xmlns:animation:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xml:space="preserve">
>>> + <defs class="ClipPathGroup">
>>> +  <clipPath id="presentation_clip_path" clipPathUnits="userSpaceOnUse">
>>> +   <rect x="0" y="0" width="11000" height="21500"/>
>>> +  </clipPath>
>>> +  <clipPath id="presentation_clip_path_shrink" clipPathUnits="userSpaceOnUse">
>>> +   <rect x="11" y="21" width="10978" height="21457"/>
>>> +  </clipPath>
>>> + </defs>
>>> + <defs>
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>>> + </defs>
>>> + <defs class="TextShapeIndex">
>>> +  <g ooo:slide="id1" ooo:id-list="id3 id4 id5 id6 id7 id8 id9 id10 id11 id12 id13 id14 id15 id16 id17 id18 id19 id20 id21 id22 id23 id24 id25 id26 id27 id28"/>
>>> + </defs>
>>> + <defs class="EmbeddedBulletChars">
>>> +  <g id="bullet-char-template-57356" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 580,1141 L 1163,571 580,0 -4,571 580,1141 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-57354" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 8,1128 L 1137,1128 1137,0 8,0 8,1128 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-10146" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 174,0 L 602,739 174,1481 1456,739 174,0 Z M 1358,739 L 309,1346 659,739 1358,739 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-10132" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 2015,739 L 1276,0 717,0 1260,543 174,543 174,936 1260,936 717,1481 1274,1481 2015,739 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-10007" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 0,-2 C -7,14 -16,27 -25,37 L 356,567 C 262,823 215,952 215,954 215,979 228,992 255,992 264,992 276,990 289,987 310,991 331,999 354,1012 L 381,999 492,748 772,1049 836,1024 860,1049 C 881,1039 901,1025 922,1006 886,937 835,863 770,784 769,783 710,716 594,584 L 774,223 C 774,196 753,168 711,139 L 727,119 C 717,90 699,76 672,76 641,76 570,178 457,381 L 164,-76 C 142,-110 111,-127 72,-127 30,-127 9,-110 8,-76 1,-67 -2,-52 -2,-32 -2,-23 -1,-13 0,-2 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-10004" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 285,-33 C 182,-33 111,30 74,156 52,228 41,333 41,471 41,549 55,616 82,672 116,743 169,778 240,778 293,778 328,747 346,684 L 369,508 C 377,444 397,411 428,410 L 1163,1116 C 1174,1127 1196,1133 1229,1133 1271,1133 1292,1118 1292,1087 L 1292,965 C 1292,929 1282,901 1262,881 L 442,47 C 390,-6 338,-33 285,-33 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-9679" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 813,0 C 632,0 489,54 383,161 276,268 223,411 223,592 223,773 276,916 383,1023 489,1130 632,1184 813,1184 992,1184 1136,1130 1245,1023 1353,916 1407,772 1407,592 1407,412 1353,268 1245,161 1136,54 992,0 813,0 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-8226" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 346,457 C 273,457 209,483 155,535 101,586 74,649 74,723 74,796 101,859 155,911 209,963 273,989 346,989 419,989 480,963 531,910 582,859 608,796 608,723 608,648 583,586 532,535 482,483 420,457 346,457 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-8211" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M -4,459 L 1135,459 1135,606 -4,606 -4,459 Z"/>
>>> +  </g>
>>> +  <g id="bullet-char-template-61548" transform="scale(0.00048828125,-0.00048828125)">
>>> +   <path d="M 173,740 C 173,903 231,1043 346,1159 462,1274 601,1332 765,1332 928,1332 1067,1274 1183,1159 1299,1043 1357,903 1357,740 1357,577 1299,437 1183,322 1067,206 928,148 765,148 601,148 462,206 346,322 231,437 173,577 173,740 Z"/>
>>> +  </g>
>>> + </defs>
>>> + <g>
>>> +  <g id="id2" class="Master_Slide">
>>> +   <g id="bg-id2" class="Background"/>
>>> +   <g id="bo-id2" class="BackgroundObjects"/>
>>> +  </g>
>>> + </g>
>>> + <g class="SlideGroup">
>>> +  <g>
>>> +   <g id="container-id1">
>>> +    <g id="id1" class="Slide" clip-path="url(#presentation_clip_path)">
>>> +     <g class="Page">
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id3">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="1349" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,3100 L 50,3100 50,1350 10050,1350 10050,3100 5050,3100 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="2445"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id4">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="3099" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,3850 L 50,3850 50,3100 10050,3100 10050,3850 5050,3850 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="3695"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id5">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="3849" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,5600 L 50,5600 50,3850 10050,3850 10050,5600 5050,5600 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="4945"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id6">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="5599" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,6350 L 50,6350 50,5600 10050,5600 10050,6350 5050,6350 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="6195"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id7">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="6349" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,8100 L 50,8100 50,6350 10050,6350 10050,8100 5050,8100 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="7445"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id8">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="8099" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,8850 L 50,8850 50,8100 10050,8100 10050,8850 5050,8850 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="8695"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id9">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="8849" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,10600 L 50,10600 50,8850 10050,8850 10050,10600 5050,10600 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="9945"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id10">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="10599" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,11350 L 50,11350 50,10600 10050,10600 10050,11350 5050,11350 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="11195"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id11">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="11349" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,13100 L 50,13100 50,11350 10050,11350 10050,13100 5050,13100 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="12445"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id12">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="13099" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,13850 L 50,13850 50,13100 10050,13100 10050,13850 5050,13850 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="13695"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id13">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="13849" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,15600 L 50,15600 50,13850 10050,13850 10050,15600 5050,15600 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="14945"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id14">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="15599" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,16350 L 50,16350 50,15600 10050,15600 10050,16350 5050,16350 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="16195"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id15">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="16349" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,18100 L 50,18100 50,16350 10050,16350 10050,18100 5050,18100 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="17445"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id16">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="18099" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,18850 L 50,18850 50,18100 10050,18100 10050,18850 5050,18850 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="18695"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id17">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="18849" width="10003" height="1753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,20600 L 50,20600 50,18850 10050,18850 10050,20600 5050,20600 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3515" y="19945"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">MSB 8 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id18">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="20599" width="10003" height="753"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" d="M 5050,21350 L 50,21350 50,20600 10050,20600 10050,21350 5050,21350 Z"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="3604" y="21195"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">LSB 2 bits</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.MeasureShape">
>>> +       <g id="id19">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="49" y="25" width="10003" height="15477"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 337,650 L 9763,650"/>
>>> +        <path fill="rgb(0,0,0)" stroke="none" d="M 50,650 L 350,750 350,550 50,650 Z"/>
>>> +        <path fill="rgb(0,0,0)" stroke="none" d="M 10050,650 L 9750,550 9750,750 10050,650 Z"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 50,15500 L 50,450"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 10050,1350 L 10050,450"/>
>>> +        <text class="SVGTextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="4253" y="468"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">16 px</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.MeasureShape">
>>> +       <g id="id20">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="10049" y="1349" width="903" height="20003"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 10750,1637 L 10750,21063"/>
>>> +        <path fill="rgb(0,0,0)" stroke="none" d="M 10750,1350 L 10650,1650 10850,1650 10750,1350 Z"/>
>>> +        <path fill="rgb(0,0,0)" stroke="none" d="M 10750,21350 L 10850,21050 10650,21050 10750,21350 Z"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 10050,1350 L 10950,1350"/>
>>> +        <path fill="none" stroke="rgb(0,0,0)" d="M 10050,21350 L 10950,21350"/>
>>> +        <text class="SVGTextShape" transform="rotate(-90 10699 12114)"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="635px" font-weight="400"><tspan class="TextPosition" x="10699" y="12114"><tspan fill="rgb(0,0,0)" stroke="none" style="white-space: pre">32 px</tspan></tspan></tspan></text>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id21">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="1309" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,3850 L 50,3850 50,1350 10050,1350 10050,3850 5050,3850 Z"/>
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>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id22">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="3809" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,6350 L 50,6350 50,3850 10050,3850 10050,6350 5050,6350 Z"/>
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>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
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>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="6309" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,8850 L 50,8850 50,6350 10050,6350 10050,8850 5050,8850 Z"/>
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>>> +      <g class="com.sun.star.drawing.CustomShape">
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>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="8809" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,11350 L 50,11350 50,8850 10050,8850 10050,11350 5050,11350 Z"/>
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>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id25">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="11309" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,13850 L 50,13850 50,11350 10050,11350 10050,13850 5050,13850 Z"/>
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>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id26">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="13809" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,16350 L 50,16350 50,13850 10050,13850 10050,16350 5050,16350 Z"/>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id27">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="16309" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,18850 L 50,18850 50,16350 10050,16350 10050,18850 5050,18850 Z"/>
>>> +       </g>
>>> +      </g>
>>> +      <g class="com.sun.star.drawing.CustomShape">
>>> +       <g id="id28">
>>> +        <rect class="BoundingBox" stroke="none" fill="none" x="9" y="18809" width="10083" height="2583"/>
>>> +        <path fill="none" stroke="rgb(52,101,164)" stroke-width="81" stroke-linejoin="round" d="M 5050,21350 L 50,21350 50,18850 10050,18850 10050,21350 5050,21350 Z"/>
>>> +       </g>
>>> +      </g>
>>> +     </g>
>>> +    </g>
>>> +   </g>
>>> +  </g>
>>> + </g>
>>> +</svg>
>>
> 

[PATCH 5/5] docs: uapi: media: Document Mediatek 10bit tiled formats

[Nicolas Dufresne]

Document V4L2_PIX_FMT_MT2110T and V4L2_PIX_FMT_MT2110R. These two
formats are nearly identical, reusing MM21 format and expending it
by inserting chunk of 16 bytes of lower 2 bit pixel data after each
chunk of 64 bytes higher 8 bit of data.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../media/v4l/pixfmt-reserved.rst             |  13 --
 .../media/v4l/pixfmt-yuv-planar.rst           | 122 ++++++++++++++++++
 2 files changed, 122 insertions(+), 13 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
index 296ad2025e8d..58f6ae25b2e7 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
+++ 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.
 .. raw:: latex
 
     \normalsize
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
index 052927bd9396..6ef5cd6bd9e2 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
@@ -369,6 +383,8 @@ 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
 ----------
@@ -453,6 +469,112 @@ it means that the low bits and high bits of one pixel may be in different tiles.
 ``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_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 have 640
+bytes separate in 8 partitions of 80 bytes each. The first 64 bytes represents
+the 8 most significant bits of pixel data. The remaining 16 bytes contains the
+2 least significant of pixel data.
+
+.. kernel-figure:: mt2110t.svg
+    :alt:    mt2110t.svg
+    :align:  center
+
+    Layout of Example MT2110T Chroma Tile
+
+Filtering out the lower 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.
+
+.. flat-table:: MT2110T LSB bits layout
+    :header-rows:  1
+    :stub-columns: 0
+
+    * -
+      - start + 0
+      - start + 1
+      - . . .
+      - start\ +\ 15
+    * - bits 0:2
+      - Y'\ :sub:`0:0`
+      - Y'\ :sub:`0:1`
+      - . . .
+      - Y'\ :sub:`0:15`
+    * - bits 2:3
+      - Y'\ :sub:`1:0`
+      - Y'\ :sub:`1:1`
+      - . . .
+      - Y'\ :sub:`1:15`
+    * - bits 4:5
+      - Y'\ :sub:`2:0`
+      - Y'\ :sub:`2:1`
+      - . . .
+      - Y'\ :sub:`2:15`
+    * - bits 6:7
+      - 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:  1
+    :stub-columns: 0
+
+    * -
+      - b0
+      -
+      -
+      -
+      - ...
+      - b3
+    * - start + 0
+      - Y'\ :sub:`0:0`
+      - Y'\ :sub:`0:1`
+      - Y'\ :sub:`0:2`
+      - Y'\ :sub:`0:3`
+      - ...
+      - Y'\ :sub:`0:12`
+      - Y'\ :sub:`0:13`
+      - Y'\ :sub:`0:14`
+      - Y'\ :sub:`0:15`
+    * - start + 4
+      - Y'\ :sub:`1:0`
+      - Y'\ :sub:`1:1`
+      - Y'\ :sub:`1:2`
+      - Y'\ :sub:`1:3`
+      - ...
+      - Y'\ :sub:`1:12`
+      - Y'\ :sub:`1:13`
+      - Y'\ :sub:`1:14`
+      - Y'\ :sub:`1:15`
+    * - start + 8
+      - Y'\ :sub:`2:0`
+      - Y'\ :sub:`2:1`
+      - Y'\ :sub:`2:2`
+      - Y'\ :sub:`2:3`
+      - ...
+      - Y'\ :sub:`2:12`
+      - Y'\ :sub:`2:13`
+      - Y'\ :sub:`2:14`
+      - Y'\ :sub:`2:15`
+    * - start\ +\ 12
+      - Y'\ :sub:`3:0`
+      - Y'\ :sub:`3:1`
+      - Y'\ :sub:`3:2`
+      - Y'\ :sub:`3:3`
+      - ...
+      - Y'\ :sub:`3:12`
+      - Y'\ :sub:`3:13`
+      - Y'\ :sub:`3:14`
+      - Y'\ :sub:`3:15`
+
 
 .. _V4L2-PIX-FMT-NV16:
 .. _V4L2-PIX-FMT-NV61:
-- 
2.40.1

Re: [PATCH 5/5] docs: uapi: media: Document Mediatek 10bit tiled formats

[Andrzej Pietrasiewicz]

Hi Nicolas,

W dniu 4.08.2023 o 21:27, Nicolas Dufresne pisze:
> Document V4L2_PIX_FMT_MT2110T and V4L2_PIX_FMT_MT2110R. These two
> formats are nearly identical, reusing MM21 format and expending it
> by inserting chunk of 16 bytes of lower 2 bit pixel data after each
> chunk of 64 bytes higher 8 bit of data.
> 
> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> ---
>   .../media/v4l/pixfmt-reserved.rst             |  13 --
>   .../media/v4l/pixfmt-yuv-planar.rst           | 122 ++++++++++++++++++
>   2 files changed, 122 insertions(+), 13 deletions(-)
> 
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst b/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
> index 296ad2025e8d..58f6ae25b2e7 100644
> --- a/Documentation/userspace-api/media/v4l/pixfmt-reserved.rst
> +++ 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.
>   .. raw:: latex
>   
>       \normalsize
> diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-planar.rst
> index 052927bd9396..6ef5cd6bd9e2 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
> @@ -369,6 +383,8 @@ 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
>   ----------
> @@ -453,6 +469,112 @@ it means that the low bits and high bits of one pixel may be in different tiles.
>   ``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_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 have 640

Each tile is 640 bytes long, divided into 8 partitions of 80 bytes?

> +bytes separate in 8 partitions of 80 bytes each. The first 64 bytes represents

bytes represent? (plural)

> +the 8 most significant bits of pixel data. The remaining 16 bytes contains the

contain? (plural)

> +2 least significant of pixel data.

least significant bits?

Regards,

Andrzej


> +
> +.. kernel-figure:: mt2110t.svg
> +    :alt:    mt2110t.svg
> +    :align:  center
> +
> +    Layout of Example MT2110T Chroma Tile
> +
> +Filtering out the lower 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.
> +
> +.. flat-table:: MT2110T LSB bits layout
> +    :header-rows:  1
> +    :stub-columns: 0
> +
> +    * -
> +      - start + 0
> +      - start + 1
> +      - . . .
> +      - start\ +\ 15
> +    * - bits 0:2
> +      - Y'\ :sub:`0:0`
> +      - Y'\ :sub:`0:1`
> +      - . . .
> +      - Y'\ :sub:`0:15`
> +    * - bits 2:3
> +      - Y'\ :sub:`1:0`
> +      - Y'\ :sub:`1:1`
> +      - . . .
> +      - Y'\ :sub:`1:15`
> +    * - bits 4:5
> +      - Y'\ :sub:`2:0`
> +      - Y'\ :sub:`2:1`
> +      - . . .
> +      - Y'\ :sub:`2:15`
> +    * - bits 6:7
> +      - 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:  1
> +    :stub-columns: 0
> +
> +    * -
> +      - b0
> +      -
> +      -
> +      -
> +      - ...
> +      - b3
> +    * - start + 0
> +      - Y'\ :sub:`0:0`
> +      - Y'\ :sub:`0:1`
> +      - Y'\ :sub:`0:2`
> +      - Y'\ :sub:`0:3`
> +      - ...
> +      - Y'\ :sub:`0:12`
> +      - Y'\ :sub:`0:13`
> +      - Y'\ :sub:`0:14`
> +      - Y'\ :sub:`0:15`
> +    * - start + 4
> +      - Y'\ :sub:`1:0`
> +      - Y'\ :sub:`1:1`
> +      - Y'\ :sub:`1:2`
> +      - Y'\ :sub:`1:3`
> +      - ...
> +      - Y'\ :sub:`1:12`
> +      - Y'\ :sub:`1:13`
> +      - Y'\ :sub:`1:14`
> +      - Y'\ :sub:`1:15`
> +    * - start + 8
> +      - Y'\ :sub:`2:0`
> +      - Y'\ :sub:`2:1`
> +      - Y'\ :sub:`2:2`
> +      - Y'\ :sub:`2:3`
> +      - ...
> +      - Y'\ :sub:`2:12`
> +      - Y'\ :sub:`2:13`
> +      - Y'\ :sub:`2:14`
> +      - Y'\ :sub:`2:15`
> +    * - start\ +\ 12
> +      - Y'\ :sub:`3:0`
> +      - Y'\ :sub:`3:1`
> +      - Y'\ :sub:`3:2`
> +      - Y'\ :sub:`3:3`
> +      - ...
> +      - Y'\ :sub:`3:12`
> +      - Y'\ :sub:`3:13`
> +      - Y'\ :sub:`3:14`
> +      - Y'\ :sub:`3:15`
> +
>   
>   .. _V4L2-PIX-FMT-NV16:
>   .. _V4L2-PIX-FMT-NV61: