video: rockchip: vop: 3399: fix post empty when enable afbdc after resume

userspace will set several frame after vop suspend, so the kernel back
buffer will be freed and after resume vop will read a freed buffer and lead
to post empty, so we close all win before suspend, after resume vop will
display black until userspace set a new frame.

Change-Id: I6648861d2162f221e7fbf85d2361ad245e7b88aa
Signed-off-by: Huang Jiachai <hjc@rock-chips.com>

diff --git a/drivers/video/rockchip/lcdc/rk322x_lcdc.c b/drivers/video/rockchip/lcdc/rk322x_lcdc.c
index 05ffe15f6fff493b678b0d31902f68d31ad0b569..74d71da379419061eef20e649820cf2536bdd4fc 100644 (file)
--- a/drivers/video/rockchip/lcdc/rk322x_lcdc.c
+++ b/drivers/video/rockchip/lcdc/rk322x_lcdc.c
@@ -3424,6 +3424,13 @@ static int vop_early_suspend(struct rk_lcdc_driver *dev_drv)
                vop_mask_writel(vop_dev, INTR_CLEAR0, INTR_MASK, INTR_MASK);
                vop_msk_reg(vop_dev, DSP_CTRL0, V_DSP_OUT_ZERO(1));
                vop_msk_reg(vop_dev, SYS_CTRL, V_VOP_STANDBY_EN(1));
+               if (VOP_CHIP(vop_dev) == VOP_RK3399) {
+                       vop_msk_reg(vop_dev, WIN0_CTRL0, V_WIN0_EN(0));
+                       vop_msk_reg(vop_dev, WIN1_CTRL0, V_WIN1_EN(0));
+                       vop_msk_reg(vop_dev, WIN2_CTRL0, V_WIN2_EN(0));
+                       vop_msk_reg(vop_dev, WIN3_CTRL0, V_WIN3_EN(0));
+                       vop_msk_reg(vop_dev, AFBCD0_CTRL, V_VOP_FBDC_EN(0));
+               }
                vop_cfg_done(vop_dev);
 
                if (dev_drv->iommu_enabled && dev_drv->mmu_dev) {