# \[PATCH AUTOSEL 5.3 13/87\] video: ssd1307fb: Start page range at page\_offset

- Subsystems: FRAMEBUFFER LAYER, THE REST
- Maintainers: Helge Deller, Linus Torvalds
- List: linux-fbdev
- 1 message, 1 author
- Page: https://ratatoskr.run/linux-fbdev/2019/09/5725873/t

## \[PATCH AUTOSEL 5.3 13/87\] video: ssd1307fb: Start page range at page\_offset

- From: Sasha Levin \<sashal@kernel.org\>
- Date: 2019-09-24 17:03:23 
- Message: https://ratatoskr.run/linux-fbdev/2019/09/5725873.md

```text
From: Marko Kohtala <redacted>

[ Upstream commit dd9782834dd9dde3624ff1acea8859f3d3e792d4 ]

The page_offset was only applied to the end of the page range. This caused
the display updates to cause a scrolling effect on the display because the
amount of data written to the display did not match the range display
expected.

Fixes: 301bc0675b67 ("video: ssd1307fb: Make use of horizontal addressing mode")
Signed-off-by: Marko Kohtala <redacted>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Daniel Vetter <redacted>
Cc: David Airlie <redacted>
Cc: Michal Vokáč <redacted>
Signed-off-by: Bartlomiej Zolnierkiewicz <redacted>
Link: https://patchwork.freedesktop.org/patch/msgid/20190618074111.9309-4-marko.kohtala@okoko.fi
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/video/fbdev/ssd1307fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index b674948e3bb8f..3f28e1b5d4221 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -432,7 +432,7 @@ static int ssd1307fb_init(struct ssd1307fb_par *par)
 	if (ret < 0)
 		return ret;
 
-	ret = ssd1307fb_write_cmd(par->client, 0x0);
+	ret = ssd1307fb_write_cmd(par->client, par->page_offset);
 	if (ret < 0)
 		return ret;
 
-- 
2.20.1
```