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| author | Steffen Persvold <spersvold@gmail.com> | 2026-06-12 18:40:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-07-04 13:39:40 +0200 |
| commit | bb136f54fc30630cfec0b983c2bfd26cfd88fe00 (patch) | |
| tree | 403aefaf621f6b15fbb44ba0c7e27308f0fc29e9 | |
| parent | 8707f02ac9f5f632039b60df2c9f3dc914709f72 (diff) | |
| download | linux-stable-bb136f54fc30630cfec0b983c2bfd26cfd88fe00.tar.gz linux-stable-bb136f54fc30630cfec0b983c2bfd26cfd88fe00.zip | |
fbdev: modedb: Fix misaligned fields in the 1920x1080-60 mode
commit d894c48a57d78206e4df9c90d4acfaf39394806a upstream.
The 1920x1080@60 modedb entry has one too many initializers before
its sync field: a stray "0" occupies the sync slot, which shifts the
remaining values by one field. The entry therefore decodes as
sync = 0, vmode = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT (0x3,
i.e. FB_VMODE_INTERLACED | FB_VMODE_DOUBLE), and flag =
FB_VMODE_NONINTERLACED, instead of the intended sync = positive H/V,
vmode = non-interlaced.
fb_find_mode() then returns a 1920x1080 mode flagged as interlaced +
doublescan with active-low syncs. Drivers that honour var->vmode and
var->sync when programming display timing enable doublescan and the
wrong sync polarity, corrupting the output.
Drop the stray initializer so sync and vmode hold their intended
values (positive H/V sync, non-interlaced), matching the adjacent
1920x1200 entry.
Fixes: c8902258b2b8 ("fbdev: modedb: Add 1920x1080 at 60 Hz video mode")
Cc: stable@vger.kernel.org
Signed-off-by: Steffen Persvold <spersvold@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/video/fbdev/core/modedb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/fbdev/core/modedb.c b/drivers/video/fbdev/core/modedb.c index e78ec7f72846..81c37eacf22b 100644 --- a/drivers/video/fbdev/core/modedb.c +++ b/drivers/video/fbdev/core/modedb.c @@ -258,7 +258,7 @@ static const struct fb_videomode modedb[] = { FB_VMODE_DOUBLE }, /* 1920x1080 @ 60 Hz, 67.3 kHz hsync */ - { NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5, 0, + { NULL, 60, 1920, 1080, 6734, 148, 88, 36, 4, 44, 5, FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED }, |