linux-kernel - [PATCH] drm/bridge: parade-ps8640: Add backpointer to drm_device in drm_dp

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Message-Id: <20211206162907.1.I1f5d1eba741e4663050ec1b8e39a753f6e42e38b@changeid>
Date:   Mon,  6 Dec 2021 16:29:16 -0800
From:   Douglas Anderson <dianders@...omium.org>
To:     dri-devel@...ts.freedesktop.org
Cc:     Lyude Paul <lyude@...hat.com>,
        Douglas Anderson <dianders@...omium.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Jonas Karlman <jonas@...boo.se>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Philip Chen <philipchen@...omium.org>,
        Robert Foss <robert.foss@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/bridge: parade-ps8640: Add backpointer to drm_device in drm_dp_aux

When we added the support for the AUX channel in commit 13afcdd7277e
("drm/bridge: parade-ps8640: Add support for AUX channel") we forgot
to set "drm_dev" to avoid the warning splat at the beginning of
drm_dp_aux_register(). Since everything was working I guess I never
noticed the splat when testing against mainline. In any case, it's
easy to fix. This is basically just like commit 6cba3fe43341 ("drm/dp:
Add backpointer to drm_device in drm_dp_aux") but just for the
parade-ps8640.

Fixes: 13afcdd7277e ("drm/bridge: parade-ps8640: Add support for AUX channel")
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/gpu/drm/bridge/parade-ps8640.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 26898042ba3d..818704bf5e86 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -449,6 +449,7 @@ static int ps8640_bridge_attach(struct drm_bridge *bridge,
 	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
 		return -EINVAL;
 
+	ps_bridge->aux.drm_dev = bridge->dev;
 	ret = drm_dp_aux_register(&ps_bridge->aux);
 	if (ret) {
 		dev_err(dev, "failed to register DP AUX channel: %d\n", ret);
-- 
2.34.1.400.ga245620fadb-goog