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drm/bridge: ps8640: Return an error for incorrect attach flags

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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>
Reviewed-by: Bilal Wasim <bwasim.lkml@gmail.com>
Tested-by: Bilal Wasim <bwasim.lkml@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200826081526.674866-4-enric.balletbo@collabora.com
This commit is contained in:
Enric Balletbo i Serra 2020-08-26 10:15:24 +02:00 committed by Sam Ravnborg
parent d82c12ab16
commit 812a65ba94
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/bridge/parade-ps8640.c
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@ -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)