linux-kernel - [PATCH 3/4] drm/bridge: dw-hdmi: do not force "none" scan mode

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Message-Id: <20200229163043.158262-4-jernej.skrabec@siol.net>
Date:   Sat, 29 Feb 2020 17:30:42 +0100
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     a.hajda@...sung.com, narmstrong@...libre.com
Cc:     Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...l.net, airlied@...ux.ie, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] drm/bridge: dw-hdmi: do not force "none" scan mode

From: Jonas Karlman <jonas@...boo.se>

Setting scan mode to "none" confuses some TVs like LG B8, which randomly
change overscan procentage over time. Digital outputs like HDMI and DVI,
handled by this controller, don't really need overscan, so we can always
set scan mode to underscan. Actually, this is exactly what
drm_hdmi_avi_infoframe_from_display_mode() already does, so we can just
remove offending line.

Signed-off-by: Jonas Karlman <jonas@...boo.se>
[updated commit message]
Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 9d7bfb1cb213..3d6021119942 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1655,8 +1655,6 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 			HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
 	}
 
-	frame.scan_mode = HDMI_SCAN_MODE_NONE;
-
 	/*
 	 * The Designware IP uses a different byte format from standard
 	 * AVI info frames, though generally the bits are in the correct
-- 
2.25.1