linux-kernel - [PATCH v2 08/10] drm/rockchip: analogix_dp: correct the connector display color format and bpc

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Message-Id: <1464066164-22863-1-git-send-email-ykk@rock-chips.com>
Date:	Tue, 24 May 2016 13:02:44 +0800
From:	Yakir Yang <ykk@...k-chips.com>
To:	David Airlie <airlied@...ux.ie>, Inki Dae <inki.dae@...sung.com>,
	Mark Yao <yzq@...k-chips.com>,
	Thierry Reding <treding@...dia.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Rob Herring <robh+dt@...nel.org>
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Douglas Anderson <dianders@...omium.org>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Javier Martinez Canillas <javier@....samsung.com>,
	emil.l.velikov@...il.com, Dan Carpenter <dan.carpenter@...cle.com>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-samsung-soc@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, Yakir Yang <ykk@...k-chips.com>
Subject: [PATCH v2 08/10] drm/rockchip: analogix_dp: correct the connector display color format and bpc

Rockchip VOP couldn't output YUV video format for eDP controller, so
when driver detect connector support YUV video format, we need to hack
it down to RGB888.

Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
Changes in v2: None

 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index f29ca3d..910cceb 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -97,6 +97,24 @@ static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 	return 0;
 }
 
+static enum drm_mode_status
+rockchip_dp_mode_valid(struct analogix_dp_plat_data *plat_data,
+		       struct drm_connector *connector,
+		       struct drm_display_mode *mode)
+{
+	struct drm_display_info *di = &connector->display_info;
+
+	if (di->color_formats & DRM_COLOR_FORMAT_YCRCB444 ||
+	    di->color_formats & DRM_COLOR_FORMAT_YCRCB422) {
+		di->color_formats &= ~(DRM_COLOR_FORMAT_YCRCB422 |
+				       DRM_COLOR_FORMAT_YCRCB444);
+		di->color_formats |= DRM_COLOR_FORMAT_RGB444;
+		di->bpc = 8;
+	}
+
+	return MODE_OK;
+}
+
 static bool
 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 				   const struct drm_display_mode *mode,
@@ -306,6 +324,7 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
 	dp->plat_data.subdev_type = dp_data->chip_type;
 	dp->plat_data.power_on = rockchip_dp_poweron;
 	dp->plat_data.power_off = rockchip_dp_powerdown;
+	dp->plat_data.mode_valid = rockchip_dp_mode_valid;
 
 	return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data);
 }
-- 
1.9.1