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docs/fb: Document current named modes

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KMS supports a number of named modes already, but it's never been
documented anywhere, let's fix that.

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v9-1-24b168e5bcd5@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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Maxime Ripard 2022-11-14 14:00:20 +01:00
parent 0a99962c0d
commit 99e49bfd93
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Documentation/fb/modedb.rst
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@ -26,6 +26,11 @@ Valid mode specifiers (mode_option argument)::
with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
Things between square brackets are optional.
Valid names are::
- NSTC: 480i output, with the CCIR System-M TV mode and NTSC color encoding
- PAL: 576i output, with the CCIR System-B TV mode and PAL color encoding
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.