From fbc1fdaa8338ec4ebd862d918a0ce3e12033e8a3 Mon Sep 17 00:00:00 2001 From: Pin-Yen Lin Date: Thu, 14 Jul 2022 17:39:20 +0800 Subject: [PATCH] drm/bridge: it6505: Power on downstream device in .atomic_enable Send DPCD DP_SET_POWER_D0 command to the monitor in .atomic_enable callback. Without this command, some monitors won't show up again after changing the resolution. Fixes: 46ca7da7f1e8 ("drm/bridge: it6505: Send DPCD SET_POWER to downstream") Signed-off-by: Pin-Yen Lin Reviewed-by: Allen Chen Fixes: 46ca7da7f1e8 ("drm/bridge: it6505: Send DPCD SET_POWER to downstream") Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20220714173715.v2.1.I85af54e9ceda74ec69f661852825845f983fc343@changeid --- 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 4b673c4792d77..e5626035f3119 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); -- 2.30.2