€•±7      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ5/translations/zh_CN/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ5/translations/zh_TW/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ5/translations/it_IT/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ5/translations/ja_JP/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ5/translations/ko_KR/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ5/translations/sp_SP/userspace-api/media/drivers/dw100”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒO/var/lib/git/docbuild/linux/Documentation/userspace-api/media/drivers/dw100.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒDW100 dewarp driver”h]”hŒDW100 dewarp driver”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h KubhŒ	paragraph”“”)”}”(hŒ°The Vivante DW100 Dewarp Processor IP core found on i.MX8MP SoC applies a
programmable geometrical transformation on the input image to correct distortion
introduced by lenses.”h]”hŒ°The Vivante DW100 Dewarp Processor IP core found on i.MX8MP SoC applies a
programmable geometrical transformation on the input image to correct distortion
introduced by lenses.”…””}”(hhËhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h Khh¶hžhubhÊ)”}”(hŒ‹The transformation function is exposed by the hardware as a grid map with 16x16
pixel macroblocks indexed using X, Y vertex coordinates.
::”h]”hŒˆThe transformation function is exposed by the hardware as a grid map with 16x16
pixel macroblocks indexed using X, Y vertex coordinates.”…””}”(hhÙhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K
hh¶hžhubhŒliteral_block”“”)”}”(hXØ                         Image width
        <--------------------------------------->

   ^    .-------.-------.-------.-------.-------.
   |    | 16x16 |       |       |       |       |
I  |    | pixel |       |       |       |       |
m  |    | block |       |       |       |       |
a  |    .-------.-------.-------.-------.-------.
g  |    |       |       |       |       |       |
e  |    |       |       |       |       |       |
   |    |       |       |       |       |       |
h  |    .-------.-------.-------.-------.-------.
e  |    |       |       |       |       |       |
i  |    |       |       |       |       |       |
g  |    |       |       |       |       |       |
h  |    .-------.-------.-------.-------.-------.
t  |    |       |       |       |       |       |
   |    |       |       |       |       |       |
   |    |       |       |       |       |       |
   v    '-------'-------'-------'-------'-------'

         Grid of Image Blocks for Dewarping Map”h]”hXØ                         Image width
        <--------------------------------------->

   ^    .-------.-------.-------.-------.-------.
   |    | 16x16 |       |       |       |       |
I  |    | pixel |       |       |       |       |
m  |    | block |       |       |       |       |
a  |    .-------.-------.-------.-------.-------.
g  |    |       |       |       |       |       |
e  |    |       |       |       |       |       |
   |    |       |       |       |       |       |
h  |    .-------.-------.-------.-------.-------.
e  |    |       |       |       |       |       |
i  |    |       |       |       |       |       |
g  |    |       |       |       |       |       |
h  |    .-------.-------.-------.-------.-------.
t  |    |       |       |       |       |       |
   |    |       |       |       |       |       |
   |    |       |       |       |       |       |
   v    '-------'-------'-------'-------'-------'

         Grid of Image Blocks for Dewarping Map”…””}”hhésbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1hçhŸh³h Khh¶hžhubhÊ)”}”(hŒEach x, y coordinate register uses 16 bits to record the coordinate address in
an unsigned 12.4 fixed point format (UQ12.4).
::”h]”hŒ|Each x, y coordinate register uses 16 bits to record the coordinate address in
an unsigned 12.4 fixed point format (UQ12.4).”…””}”(hh÷hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K&hh¶hžhubhè)”}”(hX¶  .----------------------.--------..----------------------.--------.
|         31~20        | 19~16  ||         15~4         |  3~0   |
|       (integer)      | (frac) ||       (integer)      | (frac) |
'----------------------'--------''----------------------'--------'
<-------------------------------><------------------------------->
            Y coordinate                     X coordinate

                       Remap Register Layout”h]”hX¶  .----------------------.--------..----------------------.--------.
|         31~20        | 19~16  ||         15~4         |  3~0   |
|       (integer)      | (frac) ||       (integer)      | (frac) |
'----------------------'--------''----------------------'--------'
<-------------------------------><------------------------------->
            Y coordinate                     X coordinate

                       Remap Register Layout”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1hçhŸh³h K*hh¶hžhubhÊ)”}”(hX&  The dewarping map is set from applications using the
V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP control. The control contains
an array of u32 values storing (x, y) destination coordinates for each
vertex of the grid. The x coordinate is stored in the 16 LSBs and the y
coordinate in the 16 MSBs.”h]”hX&  The dewarping map is set from applications using the
V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP control. The control contains
an array of u32 values storing (x, y) destination coordinates for each
vertex of the grid. The x coordinate is stored in the 16 LSBs and the y
coordinate in the 16 MSBs.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K3hh¶hžhubhÊ)”}”(hŒ>The number of elements in the array must match the image size:”h]”hŒ>The number of elements in the array must match the image size:”…””}”(hj!  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K9hh¶hžhubhè)”}”(hŒGelems = (DIV_ROUND_UP(width, 16) + 1) * (DIV_ROUND_UP(height, 16) + 1);”h]”hŒGelems = (DIV_ROUND_UP(width, 16) + 1) * (DIV_ROUND_UP(height, 16) + 1);”…””}”hj/  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²Œforce”‰Œlanguage”ŒC”Œhighlight_args”}”uh1hçhŸh³h K;hh¶hžhubhÊ)”}”(hŒTIf the control has not been set by the application, the driver uses an identity
map.”h]”hŒTIf the control has not been set by the application, the driver uses an identity
map.”…””}”(hjB  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K?hh¶hžhubhÊ)”}”(hŒqMore details on the DW100 hardware operations can be found in
*chapter 13.15 DeWarp* of IMX8MP_ reference manual.”h]”(hŒ>More details on the DW100 hardware operations can be found in
”…””}”(hjP  hžhhŸNh NubhŒemphasis”“”)”}”(hŒ*chapter 13.15 DeWarp*”h]”hŒchapter 13.15 DeWarp”…””}”(hjZ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jX  hjP  ubhŒ of ”…””}”(hjP  hžhhŸNh NubhŒ	reference”“”)”}”(hŒIMX8MP_”h]”hŒIMX8MP”…””}”(hjn  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œname”ŒIMX8MP”Œrefuri”Œ4https://www.nxp.com/webapp/Download?colCode=IMX8MPRM”uh1jl  hjP  Œresolved”KubhŒ reference manual.”…””}”(hjP  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KBhh¶hžhubhÊ)”}”(hŒNThe Vivante DW100 m2m driver implements the following driver-specific control:”h]”hŒNThe Vivante DW100 m2m driver implements the following driver-specific control:”…””}”(hj‹  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KEhh¶hžhubhŒdefinition_list”“”)”}”(hhh]”hŒdefinition_list_item”“”)”}”(hX"  ``V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (__u32 array)``
Specifies to DW100 driver its dewarping map (aka LUT) blob as described in
*chapter 13.15.2.3 Dewarping Remap* of IMX8MP_ reference manual as an U32
dynamic array. The image is divided into many small 16x16 blocks. If the
width/height of the image is not divisible by 16, the size of the
rightmost/bottommost block is the remainder. The dewarping map only saves
the vertex coordinates of the block. The dewarping grid map is comprised of
vertex coordinates for x and y. Each x, y coordinate register uses 16 bits
(UQ12.4) to record the coordinate address, with the Y coordinate in the
upper bits and X in the lower bits. The driver modifies the dimensions of
this control when the sink format is changed, to reflect the new input
resolution.
”h]”(hŒterm”“”)”}”(hŒ;``V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (__u32 array)``”h]”hŒliteral”“”)”}”(hj¨  h]”hŒ7V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP (__u32 array)”…””}”(hj¬  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jª  hj¦  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j¤  hŸh³h KRhj   ubhŒ
definition”“”)”}”(hhh]”hÊ)”}”(hXå  Specifies to DW100 driver its dewarping map (aka LUT) blob as described in
*chapter 13.15.2.3 Dewarping Remap* of IMX8MP_ reference manual as an U32
dynamic array. The image is divided into many small 16x16 blocks. If the
width/height of the image is not divisible by 16, the size of the
rightmost/bottommost block is the remainder. The dewarping map only saves
the vertex coordinates of the block. The dewarping grid map is comprised of
vertex coordinates for x and y. Each x, y coordinate register uses 16 bits
(UQ12.4) to record the coordinate address, with the Y coordinate in the
upper bits and X in the lower bits. The driver modifies the dimensions of
this control when the sink format is changed, to reflect the new input
resolution.”h]”(hŒKSpecifies to DW100 driver its dewarping map (aka LUT) blob as described in
”…””}”(hjÄ  hžhhŸNh NubjY  )”}”(hŒ#*chapter 13.15.2.3 Dewarping Remap*”h]”hŒ!chapter 13.15.2.3 Dewarping Remap”…””}”(hjÌ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jX  hjÄ  ubhŒ of ”…””}”(hjÄ  hžhhŸNh Nubjm  )”}”(hŒIMX8MP_”h]”hŒIMX8MP”…””}”(hjÞ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œname”ŒIMX8MP”j~  j  uh1jl  hjÄ  j€  KubhXl   reference manual as an U32
dynamic array. The image is divided into many small 16x16 blocks. If the
width/height of the image is not divisible by 16, the size of the
rightmost/bottommost block is the remainder. The dewarping map only saves
the vertex coordinates of the block. The dewarping grid map is comprised of
vertex coordinates for x and y. Each x, y coordinate register uses 16 bits
(UQ12.4) to record the coordinate address, with the Y coordinate in the
upper bits and X in the lower bits. The driver modifies the dimensions of
this control when the sink format is changed, to reflect the new input
resolution.”…””}”(hjÄ  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KHhjÁ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j¿  hj   ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jž  hŸh³h KRhj›  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j™  hh¶hžhhŸh³h NubhŒtarget”“”)”}”(hŒ@.. _IMX8MP: https://www.nxp.com/webapp/Download?colCode=IMX8MPRM”h]”h}”(h]”Œimx8mp”ah ]”h"]”Œimx8mp”ah$]”h&]”j~  j  uh1j
  h KThh¶hžhhŸh³Œ
referenced”Kubeh}”(h]”Œdw100-dewarp-driver”ah ]”h"]”Œdw100 dewarp driver”ah$]”h&]”uh1h´hhhžhhŸh³h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h³uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¹NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
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