linux-kernel - [PATCH RFC 1/5] drm/bridge: dw-hdmi: allow ycbcr420 modes for >= 0x200a

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Message-Id: <20190329104240.29585-2-narmstrong@baylibre.com>
Date:   Fri, 29 Mar 2019 11:42:36 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     a.hajda@...sung.com, Laurent.pinchart@...asonboard.com
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        dri-devel@...ts.freedesktop.org, jernej.skrabec@...l.net,
        heiko@...ech.de, maxime.ripard@...tlin.com, hjc@...k-chips.com,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH RFC 1/5] drm/bridge: dw-hdmi: allow ycbcr420 modes for >= 0x200a

Now the DW-HDMI Controller supports the HDMI2.0 modes, enable support
for these modes in the connector if the platform supports them.
We limit these modes to DW-HDMI IP version >= 0x200a which
are designed to support HDMI2.0 display modes.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Tested-by: Heiko Stuebner <heiko@...ech.de>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 6 ++++++
 include/drm/bridge/dw_hdmi.h              | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index db761329a1e3..325a87a82048 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2621,6 +2621,12 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (hdmi->phy.ops->setup_hpd)
 		hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data);
 
+	if (hdmi->version >= 0x200a)
+		hdmi->connector.ycbcr_420_allowed =
+			hdmi->plat_data->ycbcr_420_allowed;
+	else
+		hdmi->connector.ycbcr_420_allowed = false;
+
 	memset(&pdevinfo, 0, sizeof(pdevinfo));
 	pdevinfo.parent = dev;
 	pdevinfo.id = PLATFORM_DEVID_AUTO;
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 66e70770cce5..0f0e82638fbe 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -130,6 +130,7 @@ struct dw_hdmi_plat_data {
 					   const struct drm_display_mode *mode);
 	unsigned long input_bus_format;
 	unsigned long input_bus_encoding;
+	bool ycbcr_420_allowed;
 
 	/* Vendor PHY support */
 	const struct dw_hdmi_phy_ops *phy_ops;
-- 
2.21.0