tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/ssd130x: fix ssd132x encoding

Browse Source 
[ Upstream commit 1e14484677c8e87548f5f0d4eb8800e408004404 ]

The ssd132x buffer is encoded one pixel per nibble, with two pixels in
each byte.  When encoding an 8-bit greyscale input, take the top 4-bits
as the value and ensure the two pixels are distinct and do not overwrite
each other.

Fixes: fdd591e00a ("drm/ssd130x: Add support for the SSD132x OLED controller family")
Signed-off-by: John Keeping <jkeeping@inmusicbrands.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250115110139.1672488-2-jkeeping@inmusicbrands.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
John Keeping
2025-01-15 11:01:37 +00:00
committed by Greg Kroah-Hartman
parent a9c4366566
commit 5a3461ca54
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/solomon/ssd130x.c
+1 -1
View File
@@ -880,7 +880,7 @@ static int ssd132x_update_rect(struct ssd130x_device *ssd130x,
u8 n1 = buf[i * width + j];
u8 n2 = buf[i * width + j + 1];
data_array[array_idx++] = (n2 << 4) | n1;
data_array[array_idx++] = (n2 & 0xf0) | (n1 >> 4);
}
}