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Date: Mon, 6 Jun 2022 15:24:17 +0800
From: Pin-Yen Lin <treapking@...omium.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <narmstrong@...libre.com>,
Robert Foss <robert.foss@...aro.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>
Cc: Allen Chen <allen.chen@....com.tw>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Pin-Yen Lin <treapking@...omium.org>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/bridge: it6505: Power off downstream device in .atomic_enable
Power off the downstream device in .atomic_enable callback, so the
external display shows up again after changing resolution.
Fixes: 46ca7da7f1e8 ("drm/bridge: it6505: Send DPCD SET_POWER to downstream")
Signed-off-by: Pin-Yen Lin <treapking@...omium.org>
---
drivers/gpu/drm/bridge/ite-it6505.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 4b673c4792d7..e5626035f311 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2945,6 +2945,9 @@ static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
if (ret)
dev_err(dev, "Failed to setup AVI infoframe: %d", ret);
+ it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
+ DP_SET_POWER_D0);
+
it6505_update_video_parameter(it6505, mode);
ret = it6505_send_video_infoframe(it6505, &frame);
--
2.36.1.255.ge46751e96f-goog
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