drm/modes: Fill drm_cmdline mode from named modes

The current code to deal with named modes will only set the mode name, and
then it's up to drivers to try to match that name to whatever mode or
configuration they see fit.

The plan is to remove that need and move the named mode handling out of
drivers and into the core, and only rely on modes and properties. Let's
start by properly filling drm_cmdline_mode from a named mode.
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v9-11-24b168e5bcd5@cerno.techSigned-off-by: Maxime Ripard <maxime@cerno.tech>

drivers/gpu/drm/drm_modes.c

@@ -1752,11 +1752,22 @@ static int drm_mode_parse_cmdline_options(const char *str,
 
 struct drm_named_mode {
 	const char *name;
+	unsigned int xres;
+	unsigned int yres;
+	unsigned int flags;
 };
 
+#define NAMED_MODE(_name, _x, _y, _flags)		\
+	{						\
+		.name = _name,				\
+		.xres = _x,				\
+		.yres = _y,				\
+		.flags = _flags,			\
+	}
+
 static const struct drm_named_mode drm_named_modes[] = {
-	{ "NTSC", },
-	{ "PAL", },
+	NAMED_MODE("NTSC", 720, 480, DRM_MODE_FLAG_INTERLACE),
+	NAMED_MODE("PAL", 720, 576, DRM_MODE_FLAG_INTERLACE),
 };
 
 static int drm_mode_parse_cmdline_named_mode(const char *name,
@@ -1797,6 +1808,9 @@ static int drm_mode_parse_cmdline_named_mode(const char *name,
 			continue;
 
 		strcpy(cmdline_mode->name, mode->name);
+		cmdline_mode->xres = mode->xres;
+		cmdline_mode->yres = mode->yres;
+		cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
 		cmdline_mode->specified = true;
 
 		return 1;