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drm/bridge: Fix the stop condition of drm_bridge_chain_pre_enable()

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[ Upstream commit bab5cca7e609952b069a550e39fe4893149fb658 ]

The drm_bridge_chain_pre_enable() is not the proper opposite of
drm_bridge_chain_post_disable(). It continues along the chain to
_before_ the starting bridge. Let's fix that.

Fixes: 05193dc381 ("drm/bridge: Make the bridge chain a double-linked list")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210416153909.v4.1.If62a003f76a2bc4ccc6c53565becc05d2aad4430@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Douglas Anderson
2021-04-16 15:39:24 -07:00
committed by Greg Kroah-Hartman
parent 45415d1f99
commit 0cd39c9657
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_bridge.c
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@@ -522,6 +522,9 @@ void drm_bridge_chain_pre_enable(struct drm_bridge *bridge)
list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) { list_for_each_entry_reverse(iter, &encoder->bridge_chain, chain_node) {
if (iter->funcs->pre_enable) if (iter->funcs->pre_enable)
iter->funcs->pre_enable(iter); iter->funcs->pre_enable(iter);
if (iter == bridge)
break;
} }
} }
EXPORT_SYMBOL(drm_bridge_chain_pre_enable); EXPORT_SYMBOL(drm_bridge_chain_pre_enable);