linux-kernel - [PATCH v3 03/10] drm/sun4i: hdmi_enc: implement clear

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Message-Id: <20251224-limit-infoframes-2-v3-3-7fd3cacfefed@oss.qualcomm.com>
Date: Wed, 24 Dec 2025 03:02:52 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Maíra Canal <mcanal@...lia.com>,
        Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
        Chen-Yu Tsai <wens@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>, Liu Ying <victor.liu@....com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Andy Yan <andy.yan@...k-chips.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, linux-rockchip@...ts.infradead.org
Subject: [PATCH v3 03/10] drm/sun4i: hdmi_enc: implement clear_infoframe
 stub

In preparation to making clear_infoframes callbacks required, add a stub
to the sun4i driver.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
 drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index ab0938ba61f7..6263ee15880a 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -40,6 +40,14 @@
 #define drm_connector_to_sun4i_hdmi(c)		\
 	container_of_const(c, struct sun4i_hdmi, connector)
 
+static int sun4i_hdmi_clear_infoframe(struct drm_connector *connector,
+				      enum hdmi_infoframe_type type)
+{
+	drm_warn_once(connector->dev, "clearing of AVI infoframe is not implemented\n");
+
+	return 0;
+}
+
 static int sun4i_hdmi_write_infoframe(struct drm_connector *connector,
 				      enum hdmi_infoframe_type type,
 				      const u8 *buffer, size_t len)
@@ -236,6 +244,7 @@ static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev)
 
 static const struct drm_connector_hdmi_funcs sun4i_hdmi_hdmi_connector_funcs = {
 	.tmds_char_rate_valid	= sun4i_hdmi_connector_clock_valid,
+	.clear_infoframe	= sun4i_hdmi_clear_infoframe,
 	.write_infoframe	= sun4i_hdmi_write_infoframe,
 };
 

-- 
2.47.3