€•ók      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”Œ/translations/zh_CN/fb/modedb”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$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/zh_TW/fb/modedb”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/it_IT/fb/modedb”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ja_JP/fb/modedb”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ko_KR/fb/modedb”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/sp_SP/fb/modedb”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒ!modedb default video mode support”h]”hŒ!modedb default video mode support”…””}”(hh¨hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hh£hžhhŸŒ7/var/lib/git/docbuild/linux/Documentation/fb/modedb.rst”h KubhŒ	paragraph”“”)”}”(hŒ›Currently all frame buffer device drivers have their own video mode databases,
which is a mess and a waste of resources. The main idea of modedb is to have”h]”hŒ›Currently all frame buffer device drivers have their own video mode databases,
which is a mess and a waste of resources. The main idea of modedb is to have”…””}”(hh¹hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubhŒblock_quote”“”)”}”(hXf  - one routine to probe for video modes, which can be used by all frame buffer
  devices
- one generic video mode database with a fair amount of standard videomodes
  (taken from XFree86)
- the possibility to supply your own mode database for graphics hardware that
  needs non-standard modes, like amifb and Mac frame buffer drivers (which
  use macmodes.c)
”h]”hŒbullet_list”“”)”}”(hhh]”(hŒ	list_item”“”)”}”(hŒSone routine to probe for video modes, which can be used by all frame buffer
devices”h]”h¸)”}”(hŒSone routine to probe for video modes, which can be used by all frame buffer
devices”h]”hŒSone routine to probe for video modes, which can be used by all frame buffer
devices”…””}”(hhØhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K	hhÔubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhhÏubhÓ)”}”(hŒ^one generic video mode database with a fair amount of standard videomodes
(taken from XFree86)”h]”h¸)”}”(hŒ^one generic video mode database with a fair amount of standard videomodes
(taken from XFree86)”h]”hŒ^one generic video mode database with a fair amount of standard videomodes
(taken from XFree86)”…””}”(hhðhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhìubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhhÏubhÓ)”}”(hŒ¥the possibility to supply your own mode database for graphics hardware that
needs non-standard modes, like amifb and Mac frame buffer drivers (which
use macmodes.c)
”h]”h¸)”}”(hŒ¤the possibility to supply your own mode database for graphics hardware that
needs non-standard modes, like amifb and Mac frame buffer drivers (which
use macmodes.c)”h]”hŒ¤the possibility to supply your own mode database for graphics hardware that
needs non-standard modes, like amifb and Mac frame buffer drivers (which
use macmodes.c)”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhhÏubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1hÍhŸh¶h K	hhÉubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h K	hh£hžhubh¸)”}”(hŒéWhen a frame buffer device receives a video= option it doesn't know, it should
consider that to be a video mode option. If no frame buffer device is specified
in a video= option, fbmem considers that to be a global video mode option.”h]”hŒëWhen a frame buffer device receives a video= option it doesnâ€™t know, it should
consider that to be a video mode option. If no frame buffer device is specified
in a video= option, fbmem considers that to be a global video mode option.”…””}”(hj*  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒ.Valid mode specifiers (mode_option argument)::”h]”hŒ-Valid mode specifiers (mode_option argument):”…””}”(hj8  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubhŒliteral_block”“”)”}”(hŒM<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
<name>[-<bpp>][@<refresh>]”h]”hŒM<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
<name>[-<bpp>][@<refresh>]”…””}”hjH  sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1jF  hŸh¶h Khh£hžhubh¸)”}”(hŒzwith <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
Things between square brackets are optional.”h]”hŒzwith <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
Things between square brackets are optional.”…””}”(hjX  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubh¸)”}”(hŒValid names are::”h]”hŒValid names are:”…””}”(hjf  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khh£hžhubjG  )”}”(hXb  - NSTC: 480i output, with the CCIR System-M TV mode and NTSC color encoding
- NTSC-J: 480i output, with the CCIR System-M TV mode, the NTSC color
  encoding, and a black level equal to the blanking level.
- PAL: 576i output, with the CCIR System-B TV mode and PAL color encoding
- PAL-M: 480i output, with the CCIR System-M TV mode and PAL color encoding”h]”hXb  - NSTC: 480i output, with the CCIR System-M TV mode and NTSC color encoding
- NTSC-J: 480i output, with the CCIR System-M TV mode, the NTSC color
  encoding, and a black level equal to the blanking level.
- PAL: 576i output, with the CCIR System-B TV mode and PAL color encoding
- PAL-M: 480i output, with the CCIR System-M TV mode and PAL color encoding”…””}”hjt  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h Khh£hžhubh¸)”}”(hXÙ  If 'M' is specified in the mode_option argument (after <yres> and before
<bpp> and <refresh>, if specified) the timings will be calculated using
VESA(TM) Coordinated Video Timings instead of looking up the mode from a table.
If 'R' is specified, do a 'reduced blanking' calculation for digital displays.
If 'i' is specified, calculate for an interlaced mode.  And if 'm' is
specified, add margins to the calculation (1.8% of xres rounded down to 8
pixels and 1.8% of yres).”h]”hXí  If â€˜Mâ€™ is specified in the mode_option argument (after <yres> and before
<bpp> and <refresh>, if specified) the timings will be calculated using
VESA(TM) Coordinated Video Timings instead of looking up the mode from a table.
If â€˜Râ€™ is specified, do a â€˜reduced blankingâ€™ calculation for digital displays.
If â€˜iâ€™ is specified, calculate for an interlaced mode.  And if â€˜mâ€™ is
specified, add margins to the calculation (1.8% of xres rounded down to 8
pixels and 1.8% of yres).”…””}”(hj‚  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K%hh£hžhubhÈ)”}”(hŒ6Sample usage: 1024x768M@60m - CVT timing with margins
”h]”h¸)”}”(hŒ5Sample usage: 1024x768M@60m - CVT timing with margins”h]”(hŒSample usage: ”…””}”(hj”  hžhhŸNh NubhŒ	reference”“”)”}”(hŒ1024x768M@60m”h]”hŒ1024x768M@60m”…””}”(hjž  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œmailto:1024x768M@60m”uh1jœ  hj”  ubhŒ - CVT timing with margins”…””}”(hj”  hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K-hj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h K-hh£hžhubh¸)”}”(hŒ:DRM drivers also add options to enable or disable outputs:”h]”hŒ:DRM drivers also add options to enable or disable outputs:”…””}”(hj¾  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K/hh£hžhubh¸)”}”(hXX  'e' will force the display to be enabled, i.e. it will override the detection
if a display is connected. 'D' will force the display to be enabled and use
digital output. This is useful for outputs that have both analog and digital
signals (e.g. HDMI and DVI-I). For other outputs it behaves like 'e'. If 'd'
is specified the output is disabled.”h]”hXh  â€˜eâ€™ will force the display to be enabled, i.e. it will override the detection
if a display is connected. â€˜Dâ€™ will force the display to be enabled and use
digital output. This is useful for outputs that have both analog and digital
signals (e.g. HDMI and DVI-I). For other outputs it behaves like â€˜eâ€™. If â€˜dâ€™
is specified the output is disabled.”…””}”(hjÌ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K1hh£hžhubh¸)”}”(hŒ‡You can additionally specify which output the options matches to.
To force the VGA output to be enabled and drive a specific mode say::”h]”hŒ†You can additionally specify which output the options matches to.
To force the VGA output to be enabled and drive a specific mode say:”…””}”(hjÚ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K7hh£hžhubjG  )”}”(hŒvideo=VGA-1:1280x1024@60me”h]”hŒvideo=VGA-1:1280x1024@60me”…””}”hjè  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K:hh£hžhubh¸)”}”(hŒLSpecifying the option multiple times for different ports is possible, e.g.::”h]”hŒKSpecifying the option multiple times for different ports is possible, e.g.:”…””}”(hjö  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K<hh£hžhubjG  )”}”(hŒvideo=LVDS-1:d video=HDMI-1:D”h]”hŒvideo=LVDS-1:d video=HDMI-1:D”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K>hh£hžhubh¸)”}”(hŒEOptions can also be passed after the mode, using commas as separator.”h]”hŒEOptions can also be passed after the mode, using commas as separator.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K@hh£hžhubhÈ)”}”(hŒHSample usage: 720x480,rotate=180 - 720x480 mode, rotated by 180 degrees
”h]”h¸)”}”(hŒGSample usage: 720x480,rotate=180 - 720x480 mode, rotated by 180 degrees”h]”hŒGSample usage: 720x480,rotate=180 - 720x480 mode, rotated by 180 degrees”…””}”(hj$  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KBhj   ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h KBhh£hžhubh¸)”}”(hŒValid options are::”h]”hŒValid options are:”…””}”(hj8  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KDhh£hžhubjG  )”}”(hX¢  - margin_top, margin_bottom, margin_left, margin_right (integer):
  Number of pixels in the margins, typically to deal with overscan on TVs
- reflect_x (boolean): Perform an axial symmetry on the X axis
- reflect_y (boolean): Perform an axial symmetry on the Y axis
- rotate (integer): Rotate the initial framebuffer by x
  degrees. Valid values are 0, 90, 180 and 270.
- tv_mode: Analog TV mode. One of "NTSC", "NTSC-443", "NTSC-J", "PAL",
  "PAL-M", "PAL-N", or "SECAM".
- panel_orientation, one of "normal", "upside_down", "left_side_up", or
  "right_side_up". For KMS drivers only, this sets the "panel orientation"
  property on the kms connector as hint for kms users.”h]”hX¢  - margin_top, margin_bottom, margin_left, margin_right (integer):
  Number of pixels in the margins, typically to deal with overscan on TVs
- reflect_x (boolean): Perform an axial symmetry on the X axis
- reflect_y (boolean): Perform an axial symmetry on the Y axis
- rotate (integer): Rotate the initial framebuffer by x
  degrees. Valid values are 0, 90, 180 and 270.
- tv_mode: Analog TV mode. One of "NTSC", "NTSC-443", "NTSC-J", "PAL",
  "PAL-M", "PAL-N", or "SECAM".
- panel_orientation, one of "normal", "upside_down", "left_side_up", or
  "right_side_up". For KMS drivers only, this sets the "panel orientation"
  property on the kms connector as hint for kms users.”…””}”hjF  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h KFhh£hžhubhŒ
transition”“”)”}”(hŒM-----------------------------------------------------------------------------”h]”h}”(h]”h ]”h"]”h$]”h&]”uh1jT  hŸh¶h KShh£hžhubh¢)”}”(hhh]”(h§)”}”(hŒ5What is the VESA(TM) Coordinated Video Timings (CVT)?”h]”hŒ5What is the VESA(TM) Coordinated Video Timings (CVT)?”…””}”(hjc  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj`  hžhhŸh¶h KVubh¸)”}”(hŒFrom the VESA(TM) Website:”h]”hŒFrom the VESA(TM) Website:”…””}”(hjq  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KXhj`  hžhubhÈ)”}”(hXË  "The purpose of CVT is to provide a method for generating a consistent
 and coordinated set of standard formats, display refresh rates, and
 timing specifications for computer display products, both those
 employing CRTs, and those using other display technologies. The
 intention of CVT is to give both source and display manufacturers a
 common set of tools to enable new timings to be developed in a
 consistent manner that ensures greater compatibility."
”h]”hŒdefinition_list”“”)”}”(hhh]”hŒdefinition_list_item”“”)”}”(hXÅ  "The purpose of CVT is to provide a method for generating a consistent
and coordinated set of standard formats, display refresh rates, and
timing specifications for computer display products, both those
employing CRTs, and those using other display technologies. The
intention of CVT is to give both source and display manufacturers a
common set of tools to enable new timings to be developed in a
consistent manner that ensures greater compatibility."
”h]”(hŒterm”“”)”}”(hŒF"The purpose of CVT is to provide a method for generating a consistent”h]”hŒHâ€œThe purpose of CVT is to provide a method for generating a consistent”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jŽ  hŸh¶h K`hjŠ  ubhŒ
definition”“”)”}”(hhh]”h¸)”}”(hX}  and coordinated set of standard formats, display refresh rates, and
timing specifications for computer display products, both those
employing CRTs, and those using other display technologies. The
intention of CVT is to give both source and display manufacturers a
common set of tools to enable new timings to be developed in a
consistent manner that ensures greater compatibility."”h]”hX  and coordinated set of standard formats, display refresh rates, and
timing specifications for computer display products, both those
employing CRTs, and those using other display technologies. The
intention of CVT is to give both source and display manufacturers a
common set of tools to enable new timings to be developed in a
consistent manner that ensures greater compatibility.â€”…””}”(hj£  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K[hj   ubah}”(h]”h ]”h"]”h$]”h&]”uh1jž  hjŠ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jˆ  hŸh¶h K`hj…  ubah}”(h]”h ]”h"]”h$]”h&]”uh1jƒ  hj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h KZhj`  hžhubh¸)”}”(hXr  This is the third standard approved by VESA(TM) concerning video timings.  The
first was the Discrete Video Timings (DVT) which is  a collection of
pre-defined modes approved by VESA(TM).  The second is the Generalized Timing
Formula (GTF) which is an algorithm to calculate the timings, given the
pixelclock, the horizontal sync frequency, or the vertical refresh rate.”h]”hXr  This is the third standard approved by VESA(TM) concerning video timings.  The
first was the Discrete Video Timings (DVT) which is  a collection of
pre-defined modes approved by VESA(TM).  The second is the Generalized Timing
Formula (GTF) which is an algorithm to calculate the timings, given the
pixelclock, the horizontal sync frequency, or the vertical refresh rate.”…””}”(hjÉ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kbhj`  hžhubh¸)”}”(hXu  The GTF is limited by the fact that it is designed mainly for CRT displays.
It artificially increases the pixelclock because of its high blanking
requirement. This is inappropriate for digital display interface with its high
data rate which requires that it conserves the pixelclock as much as possible.
Also, GTF does not take into account the aspect ratio of the display.”h]”hXu  The GTF is limited by the fact that it is designed mainly for CRT displays.
It artificially increases the pixelclock because of its high blanking
requirement. This is inappropriate for digital display interface with its high
data rate which requires that it conserves the pixelclock as much as possible.
Also, GTF does not take into account the aspect ratio of the display.”…””}”(hj×  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khhj`  hžhubh¸)”}”(hŒËThe CVT addresses these limitations.  If used with CRT's, the formula used
is a derivation of GTF with a few modifications.  If used with digital
displays, the "reduced blanking" calculation can be used.”h]”hŒÑThe CVT addresses these limitations.  If used with CRTâ€™s, the formula used
is a derivation of GTF with a few modifications.  If used with digital
displays, the â€œreduced blankingâ€ calculation can be used.”…””}”(hjå  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Knhj`  hžhubh¸)”}”(hXG  From the framebuffer subsystem perspective, new formats need not be added
to the global mode database whenever a new mode is released by display
manufacturers. Specifying for CVT will work for most, if not all, relatively
new CRT displays and probably with most flatpanels, if 'reduced blanking'
calculation is specified.  (The CVT compatibility of the display can be
determined from its EDID. The version 1.3 of the EDID has extra 128-byte
blocks where additional timing information is placed.  As of this time, there
is no support yet in the layer to parse this additional blocks.)”h]”hXK  From the framebuffer subsystem perspective, new formats need not be added
to the global mode database whenever a new mode is released by display
manufacturers. Specifying for CVT will work for most, if not all, relatively
new CRT displays and probably with most flatpanels, if â€˜reduced blankingâ€™
calculation is specified.  (The CVT compatibility of the display can be
determined from its EDID. The version 1.3 of the EDID has extra 128-byte
blocks where additional timing information is placed.  As of this time, there
is no support yet in the layer to parse this additional blocks.)”…””}”(hjó  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Krhj`  hžhubh¸)”}”(hŒPCVT also introduced a new naming convention (should be seen from dmesg output)::”h]”hŒOCVT also introduced a new naming convention (should be seen from dmesg output):”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K{hj`  hžhubjG  )”}”(hX  <pix>M<a>[-R]

where: pix = total amount of pixels in MB (xres x yres)
       M   = always present
       a   = aspect ratio (3 - 4:3; 4 - 5:4; 9 - 15:9, 16:9; A - 16:10)
      -R   = reduced blanking

      example:  .48M3-R - 800x600 with reduced blanking”h]”hX  <pix>M<a>[-R]

where: pix = total amount of pixels in MB (xres x yres)
       M   = always present
       a   = aspect ratio (3 - 4:3; 4 - 5:4; 9 - 15:9, 16:9; A - 16:10)
      -R   = reduced blanking

      example:  .48M3-R - 800x600 with reduced blanking”…””}”hj  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K}hj`  hžhubh¸)”}”(hŒANote: VESA(TM) has restrictions on what is a standard CVT timing:”h]”hŒANote: VESA(TM) has restrictions on what is a standard CVT timing:”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K†hj`  hžhubhÈ)”}”(hŒ£- aspect ratio can only be one of the above values
- acceptable refresh rates are 50, 60, 70 or 85 Hz only
- if reduced blanking, the refresh rate must be at 60Hz
”h]”hÎ)”}”(hhh]”(hÓ)”}”(hŒ0aspect ratio can only be one of the above values”h]”h¸)”}”(hj4  h]”hŒ0aspect ratio can only be one of the above values”…””}”(hj6  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kˆhj2  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj/  ubhÓ)”}”(hŒ5acceptable refresh rates are 50, 60, 70 or 85 Hz only”h]”h¸)”}”(hjK  h]”hŒ5acceptable refresh rates are 50, 60, 70 or 85 Hz only”…””}”(hjM  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K‰hjI  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj/  ubhÓ)”}”(hŒ6if reduced blanking, the refresh rate must be at 60Hz
”h]”h¸)”}”(hŒ5if reduced blanking, the refresh rate must be at 60Hz”h]”hŒ5if reduced blanking, the refresh rate must be at 60Hz”…””}”(hjd  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KŠhj`  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj/  ubeh}”(h]”h ]”h"]”h$]”h&]”j"  j#  uh1hÍhŸh¶h Kˆhj+  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h Kˆhj`  hžhubh¸)”}”(hŒpIf one of the above are not satisfied, the kernel will print a warning but the
timings will still be calculated.”h]”hŒpIf one of the above are not satisfied, the kernel will print a warning but the
timings will still be calculated.”…””}”(hj„  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KŒhj`  hžhubjU  )”}”(hŒM-----------------------------------------------------------------------------”h]”h}”(h]”h ]”h"]”h$]”h&]”uh1jT  hŸh¶h Khj`  hžhubh¸)”}”(hŒ.To find a suitable video mode, you just call::”h]”hŒ-To find a suitable video mode, you just call:”…””}”(hjœ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K‘hj`  hžhubjG  )”}”(hX<  int __init fb_find_mode(struct fb_var_screeninfo *var,
                        struct fb_info *info, const char *mode_option,
                        const struct fb_videomode *db, unsigned int dbsize,
                        const struct fb_videomode *default_mode,
                        unsigned int default_bpp)”h]”hX<  int __init fb_find_mode(struct fb_var_screeninfo *var,
                        struct fb_info *info, const char *mode_option,
                        const struct fb_videomode *db, unsigned int dbsize,
                        const struct fb_videomode *default_mode,
                        unsigned int default_bpp)”…””}”hjª  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K“hj`  hžhubh¸)”}”(hŒfwith db/dbsize your non-standard video mode database, or NULL to use the
standard video mode database.”h]”hŒfwith db/dbsize your non-standard video mode database, or NULL to use the
standard video mode database.”…””}”(hj¸  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K™hj`  hžhubh¸)”}”(hŒâfb_find_mode() first tries the specified video mode (or any mode that matches,
e.g. there can be multiple 640x480 modes, each of them is tried). If that
fails, the default mode is tried. If that fails, it walks over all modes.”h]”hŒâfb_find_mode() first tries the specified video mode (or any mode that matches,
e.g. there can be multiple 640x480 modes, each of them is tried). If that
fails, the default mode is tried. If that fails, it walks over all modes.”…””}”(hjÆ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kœhj`  hžhubh¸)”}”(hŒCTo specify a video mode at bootup, use the following boot options::”h]”hŒBTo specify a video mode at bootup, use the following boot options:”…””}”(hjÔ  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K hj`  hžhubjG  )”}”(hŒ.video=<driver>:<xres>x<yres>[-<bpp>][@refresh]”h]”hŒ.video=<driver>:<xres>x<yres>[-<bpp>][@refresh]”…””}”hjâ  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K¢hj`  hžhubh¸)”}”(hŒ´where <driver> is a name from the table below.  Valid default modes can be
found in drivers/video/fbdev/core/modedb.c.  Check your driver's documentation.
There may be more modes::”h]”hŒµwhere <driver> is a name from the table below.  Valid default modes can be
found in drivers/video/fbdev/core/modedb.c.  Check your driverâ€™s documentation.
There may be more modes:”…””}”(hjð  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K¤hj`  hžhubjG  )”}”(hXÄ  Drivers that support modedb boot options
Boot Name     Cards Supported

amifb       - Amiga chipset frame buffer
aty128fb    - ATI Rage128 / Pro frame buffer
atyfb       - ATI Mach64 frame buffer
pm2fb       - Permedia 2/2V frame buffer
pm3fb       - Permedia 3 frame buffer
sstfb       - Voodoo 1/2 (SST1) chipset frame buffer
tdfxfb      - 3D Fx frame buffer
tridentfb   - Trident (Cyber)blade chipset frame buffer
vt8623fb    - VIA 8623 frame buffer”h]”hXÄ  Drivers that support modedb boot options
Boot Name     Cards Supported

amifb       - Amiga chipset frame buffer
aty128fb    - ATI Rage128 / Pro frame buffer
atyfb       - ATI Mach64 frame buffer
pm2fb       - Permedia 2/2V frame buffer
pm3fb       - Permedia 3 frame buffer
sstfb       - Voodoo 1/2 (SST1) chipset frame buffer
tdfxfb      - 3D Fx frame buffer
tridentfb   - Trident (Cyber)blade chipset frame buffer
vt8623fb    - VIA 8623 frame buffer”…””}”hjþ  sbah}”(h]”h ]”h"]”h$]”h&]”jV  jW  uh1jF  hŸh¶h K¨hj`  hžhubh¸)”}”(hŒ‡BTW, only a few fb drivers use this at the moment. Others are to follow
(feel free to send patches). The DRM drivers also support this.”h]”hŒ‡BTW, only a few fb drivers use this at the moment. Others are to follow
(feel free to send patches). The DRM drivers also support this.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Kµhj`  hžhubeh}”(h]”Œ1what-is-the-vesa-tm-coordinated-video-timings-cvt”ah ]”h"]”Œ5what is the vesa(tm) coordinated video timings (cvt)?”ah$]”h&]”uh1h¡hh£hžhhŸh¶h KVubeh}”(h]”Œ!modedb-default-video-mode-support”ah ]”h"]”Œ!modedb default video mode support”ah$]”h&]”uh1h¡hhhžhhŸh¶h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h¶uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¦NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jM  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h¶Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j'  j$  j  j  uŒ	nametypes”}”(j'  ‰j  ‰uh}”(j$  h£j  j`  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.