6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Zimmermann <tzimmerm...@suse.de>
commit 76c332d119f9048c6e16b52359f401510f18b2ff upstream.
Fix an off-by-one error when setting the vblanking start in
<VBLKSTR>. Commit d6460bd52c27 ("drm/mgag200: Add dedicated
variables for blanking fields") switched the value from
crtc_vdisplay to crtc_vblank_start, which DRM helpers copy
from the former. The commit missed to subtract one though.
Reported-by: Wakko Warner <wa...@animx.eu.org>
Closes:
https://lore.kernel.org/dri-devel/CAMwc25rKPKooaSp85zDq2eh-9q4UPZD=rqsdbrp1faagdnm...@mail.gmail.com/
Reported-by: Сергей <afmerl...@gmail.com>
Closes:
https://lore.kernel.org/all/5b193b75-40b1-4342-a16a-ae9fc62f2...@gmail.com/
Closes: https://bbs.archlinux.org/viewtopic.php?id=303819
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
Fixes: d6460bd52c27 ("drm/mgag200: Add dedicated variables for blanking fields")
Cc: Thomas Zimmermann <tzimmerm...@suse.de>
Cc: Jocelyn Falempe <jfale...@redhat.com>
Cc: Dave Airlie <airl...@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <sta...@vger.kernel.org> # v6.12+
Reviewed-by: Jocelyn Falempe <jfale...@redhat.com>
Tested-by: Wakko Warner <wa...@animx.eu.org>
Link: https://lore.kernel.org/r/20250416083847.51764-1-tzimmerm...@suse.de
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/mgag200/mgag200_mode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -223,7 +223,7 @@ void mgag200_set_mode_regs(struct mga_de
vsyncstr = mode->crtc_vsync_start - 1;
vsyncend = mode->crtc_vsync_end - 1;
vtotal = mode->crtc_vtotal - 2;
- vblkstr = mode->crtc_vblank_start;
+ vblkstr = mode->crtc_vblank_start - 1;
vblkend = vtotal + 1;
linecomp = vdispend;
