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From:   Rob Clark <robdclark@gmail.com>
To:     dri-devel@lists.freedesktop.org
Cc:     linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Stephen Boyd <swboyd@chromium.org>,
        Douglas Anderson <dianders@chromium.org>,
        Rob Clark <robdclark@chromium.org>,
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        Robert Foss <robert.foss@linaro.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
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        Jernej Skrabec <jernej.skrabec@gmail.com>,
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        Daniel Vetter <daniel@ffwll.ch>,
        Jagan Teki <jagan@amarulasolutions.com>,
        linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 1/4] drm/bridge: ti-sn65dsi86: Avoid creating multiple connectors
Date:   Wed, 11 Aug 2021 16:52:47 -0700
Message-Id: <20210811235253.924867-2-robdclark@gmail.com>
In-Reply-To: <20210811235253.924867-1-robdclark@gmail.com>
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From: Rob Clark <robdclark@chromium.org>

If we created our own connector because the driver does not support the
NO_CONNECTOR flag, we don't want the downstream bridge to *also* create
a connector.  And if this driver did pass the NO_CONNECTOR flag (and we
supported that mode) this would change nothing.

Fixes: 4e5763f03e10 ("drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridge")
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 9bf889302bcc..5d3b30b2f547 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -736,6 +736,9 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge,
 	}
 	pdata->dsi = dsi;
 
+	/* We never want the next bridge to *also* create a connector: */
+	flags |= DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+
 	/* Attach the next bridge */
 	ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge,
 				&pdata->bridge, flags);
-- 
2.31.1