linux-kernel - [PATCH 2/2] drm/meson: dw-hdmi: disable DW-HDMI CEC sub-driver

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Message-Id: <20210416092737.1971876-3-narmstrong@baylibre.com>
Date:   Fri, 16 Apr 2021 11:27:37 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     jonas@...boo.se, jernej.skrabec@...l.net, robert.foss@...aro.org,
        Laurent.pinchart@...asonboard.com
Cc:     dri-devel@...ts.freedesktop.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH 2/2] drm/meson: dw-hdmi: disable DW-HDMI CEC sub-driver

On the Amlogic SoCs, the DW-HDMI HW support is here but the DW-HDMI CEC signal
is not connected to a physical pin, leading to confusion when the dw-hdmi cec
controller can't communicate on the bus.

Disable it to avoid exposing a non-functinal bus.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/meson/meson_dw_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index aad75a22dc33..2ed87cfdd735 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -1103,6 +1103,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	dw_plat_data->phy_data = meson_dw_hdmi;
 	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
 	dw_plat_data->ycbcr_420_allowed = true;
+	dw_plat_data->disable_cec = true;
 
 	if (dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
 	    dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
-- 
2.25.1