From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Date: Tue, 24 Sep 2019 16:48:02 +0000 Subject: [PATCH AUTOSEL 4.19 05/50] video: ssd1307fb: Start page range at page_offset Message-Id: <20190924164847.27780-5-sashal@kernel.org> List-Id: References: <20190924164847.27780-1-sashal@kernel.org> In-Reply-To: <20190924164847.27780-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mark Rutland , Sasha Levin , linux-fbdev@vger.kernel.org, =?UTF-8?q?Michal=20Vok=C3=A1=C4=8D?= , Bartlomiej Zolnierkiewicz , David Airlie , dri-devel@lists.freedesktop.org, Marko Kohtala , Rob Herring From: Marko Kohtala [ 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 Cc: Mark Rutland Cc: Rob Herring Cc: Daniel Vetter Cc: David Airlie Cc: Michal Vokáč Signed-off-by: Bartlomiej Zolnierkiewicz Link: https://patchwork.freedesktop.org/patch/msgid/20190618074111.9309-4-marko.kohtala@okoko.fi Signed-off-by: Sasha Levin --- 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 6439231f2db22..da565f39c9b06 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -433,7 +433,7 @@ 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