From b02cb0878ffbbe915db14b8ce5a95cc8321de377 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Wed, 4 Mar 2020 11:40:43 +0100
Subject: drm/bridge: dw-hdmi: add max bpc connector property
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Git-commit: b8e810e868f73a698af9bde1ac51a332c0f61fc4
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
Add the max_bpc property to the dw-hdmi connector to prepare support
for 10, 12 & 16bit output support.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jernej Škrabec <jernej.skrabec@siol.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200304104052.17196-3-narmstrong@baylibre.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 237c8c440c86..ba738012d0ff 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2420,6 +2420,14 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge,
DRM_MODE_CONNECTOR_HDMIA,
hdmi->ddc);
+ /*
+ * drm_connector_attach_max_bpc_property() requires the
+ * connector to have a state.
+ */
+ drm_atomic_helper_connector_reset(connector);
+
+ drm_connector_attach_max_bpc_property(connector, 8, 16);
+
if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe)
drm_object_attach_property(&connector->base,
connector->dev->mode_config.hdr_output_metadata_property, 0);
--
2.28.0