linux-kernel - [PATCH] drm/rockchip: vop: fix vop full rgb24 r/b color error

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Date:   Fri, 19 Jun 2020 10:12:51 +0800
From:   Sandy Huang <hjc@...k-chips.com>
To:     Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     andy.yan@...k-chips.com, huangtao@...k-chips.com,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/rockchip: vop: fix vop full rgb24 r/b color error

RGB888 format msb is red component and the lsb is blue component,
at vop full platform this is swapped, and this is different from vop
lite and vop next, so add this patch to fix it.

Signed-off-by: Sandy Huang <hjc@...k-chips.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index c80f7d9fd13f..1c17048ad737 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -132,6 +132,7 @@ struct vop_win {
 
 struct rockchip_rgb;
 struct vop {
+	uint32_t version;
 	struct drm_crtc crtc;
 	struct device *dev;
 	struct drm_device *drm_dev;
@@ -989,6 +990,12 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
 	VOP_WIN_SET(vop, win, dsp_st, dsp_st);
 
 	rb_swap = has_rb_swapped(fb->format->format);
+	/*
+	 * VOP full need to do rb swap to show rgb888/bgr888 format color correctly
+	 */
+	if ((fb->format->format == DRM_FORMAT_RGB888 || fb->format->format == DRM_FORMAT_BGR888) &&
+	    VOP_MAJOR(vop->version) == 3)
+		rb_swap = !rb_swap;
 	VOP_WIN_SET(vop, win, rb_swap, rb_swap);
 
 	/*
@@ -2091,6 +2098,7 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
 	vop->dev = dev;
 	vop->data = vop_data;
 	vop->drm_dev = drm_dev;
+	vop->version = vop_data->version;
 	dev_set_drvdata(dev, vop);
 
 	vop_win_init(vop);
-- 
2.17.1