diff options
Diffstat (limited to 'board/chromebook/elm/patches/linux/0003-drm-bridge-ps8640-Return-an-error-for-incorrect-atta.patch')
| -rw-r--r-- | board/chromebook/elm/patches/linux/0003-drm-bridge-ps8640-Return-an-error-for-incorrect-atta.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/board/chromebook/elm/patches/linux/0003-drm-bridge-ps8640-Return-an-error-for-incorrect-atta.patch b/board/chromebook/elm/patches/linux/0003-drm-bridge-ps8640-Return-an-error-for-incorrect-atta.patch new file mode 100644 index 0000000000..5f52c45424 --- /dev/null +++ b/board/chromebook/elm/patches/linux/0003-drm-bridge-ps8640-Return-an-error-for-incorrect-atta.patch @@ -0,0 +1,35 @@ +From 62afc499fc46c8018f40733c31a675b28f0717d8 Mon Sep 17 00:00:00 2001 +From: Enric Balletbo i Serra <enric.balletbo@collabora.com> +Date: Wed, 26 Aug 2020 10:15:24 +0200 +Subject: [PATCH 3/5] drm/bridge: ps8640: Return an error for incorrect attach + flags + +Bridge drivers that implement the new model only shall return an error +from their attach() handler when the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag +is not set. So make sure we return an error because only the new +drm_bridge model is supported. + +Reviewed-by: Sam Ravnborg <sam@ravnborg.org> +Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> +--- + drivers/gpu/drm/bridge/parade-ps8640.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c +index 13755d278db6..ce3e8b2da8c9 100644 +--- a/drivers/gpu/drm/bridge/parade-ps8640.c ++++ b/drivers/gpu/drm/bridge/parade-ps8640.c +@@ -200,6 +200,10 @@ static int ps8640_bridge_attach(struct drm_bridge *bridge, + .channel = 0, + .node = NULL, + }; ++ ++ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) ++ return -EINVAL; ++ + /* port@0 is ps8640 dsi input port */ + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); + if (!in_ep) +-- +2.25.1 + |