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drm/modes: Support modes names on the command line

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The drm subsystem also uses the video= kernel parameter, and in the
documentation refers to the fbdev documentation for that parameter.

However, that documentation also says that instead of giving the mode using
its resolution we can also give a name. However, DRM doesn't handle that
case at the moment. Even though in most case it shouldn't make any
difference, it might be useful for analog modes, where different standards
might have the same resolution, but still have a few different parameters
that are not encoded in the modes (NTSC vs NTSC-J vs PAL-M for example).

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/18443e0c3bdbbd16cea4ec63bc7f2079b820b43b.1560783090.git-series.maxime.ripard@bootlin.com
This commit is contained in:
Maxime Ripard
2019-06-19 12:17:50 +02:00
parent e08ab74bd4
commit 3aeeb13d89
4 changed files with 59 additions and 17 deletions
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7
include/drm/drm_connector.h
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@@ -932,6 +932,13 @@ struct drm_connector_funcs {
* parser.
*/
struct drm_cmdline_mode {
/**
* @name:
*
* Name of the mode.
*/
char name[DRM_DISPLAY_MODE_LEN];
/**
* @specified:
*