From: Maxime Ripard <maxime@cerno.tech>
Date: Mon, 14 Nov 2022 13:00:20 +0000 (+0100)
Subject: docs/fb: Document current named modes
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=99e49bfd9339a7fe9cb89202ad5f392573739e4f;p=linux.git

docs/fb: Document current named modes

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>
---

diff --git a/Documentation/fb/modedb.rst b/Documentation/fb/modedb.rst
index 4d2411e32ebba..e533750331460 100644
--- a/Documentation/fb/modedb.rst
+++ b/Documentation/fb/modedb.rst
@@ -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.