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Subject[PATCH 5/5] drm/modes: parse_cmdline: Add support for named modes containing dashes
Date
It is fairly common for named video modes to contain dashes (e.g.
"tt-mid" on Atari, "dblntsc-ff" on Amiga). Currently such mode names
are not recognized, as the dash is considered to be a separator between
mode name and bpp.

Fix this by skipping any dashes that are not followed immediately by a
digit when looking for the separator.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
drivers/gpu/drm/drm_modes.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 7a00eb6df502e991..52e852518c6ad8e9 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1828,6 +1828,8 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option,

/* Try to locate the bpp and refresh specifiers, if any */
bpp_ptr = strchr(name, '-');
+ while (bpp_ptr && !isdigit(bpp_ptr[1]))
+ bpp_ptr = strchr(bpp_ptr + 1, '-');
if (bpp_ptr)
bpp_off = bpp_ptr - name;

--
2.25.1
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