linux-kernel - [PATCH 1/3] dt-bindings: display: ssd1307fb: Change "solomon,page-offset" default value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20231116180743.2763021-1-javierm@redhat.com>
Date:   Thu, 16 Nov 2023 19:07:37 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Sahaj Sarup <sahaj.sarup@...aro.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH 1/3] dt-bindings: display: ssd1307fb: Change "solomon,page-offset" default value

This is used to specify the page start address offset of the display RAM.

The value is used as offset when setting the page start address with the
SSD130X_SET_PAGE_RANGE command, and the driver currently sets its value to
1 if the property is not present in the Device Tree.

But the datasheet mentions that the value on reset for the page start is a
0, so it makes more sense to also have 0 as the default value for the page
offset if the property is not present.

In fact, using a default value of 1 leads to the display not working when
the fbdev is attached to the framebuffer console.

Reported-by: Sahaj Sarup <sahaj.sarup@...aro.org>
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

 .../devicetree/bindings/display/solomon,ssd1307fb.yaml          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
index 3afbb52d1b7f..badd81459aaa 100644
--- a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
+++ b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
@@ -35,7 +35,7 @@ properties:
 
   solomon,page-offset:
     $ref: /schemas/types.yaml#/definitions/uint32
-    default: 1
+    default: 0
     description:
       Offset of pages (band of 8 pixels) that the screen is mapped to
 
-- 
2.41.0