From d1f8face0fc1298c88ef4a0479c3027b46ca2c77 Mon Sep 17 00:00:00 2001 From: Andy Yan Date: Mon, 11 Dec 2023 19:57:52 +0800 Subject: drm/rockchip: vop2: Add write mask for VP config done The write mask bit is used to make sure when writing config done bit for one VP will not overwrite the other. Unfortunately, the write mask bit is missing on rk3566/8, that means when we write to these bits, it will not take any effect. We need this to make the vop work properly after rk3566/8 variants. Signed-off-by: Andy Yan Signed-off-by: Heiko Stuebner Link: https://patchwork.freedesktop.org/patch/msgid/20231211115752.1785013-1-andyshrk@163.com --- drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c index a019cc9bbd54..c4a372286580 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c @@ -268,12 +268,23 @@ static bool vop2_cluster_window(const struct vop2_win *win) return win->data->feature & WIN_FEATURE_CLUSTER; } +/* + * Note: + * The write mask function is documented but missing on rk3566/8, writes + * to these bits have no effect. For newer soc(rk3588 and following) the + * write mask is needed for register writes. + * + * GLB_CFG_DONE_EN has no write mask bit. + * + */ static void vop2_cfg_done(struct vop2_video_port *vp) { struct vop2 *vop2 = vp->vop2; + u32 val = RK3568_REG_CFG_DONE__GLB_CFG_DONE_EN; + + val |= BIT(vp->id) | (BIT(vp->id) << 16); - regmap_set_bits(vop2->map, RK3568_REG_CFG_DONE, - BIT(vp->id) | RK3568_REG_CFG_DONE__GLB_CFG_DONE_EN); + regmap_set_bits(vop2->map, RK3568_REG_CFG_DONE, val); } static void vop2_win_disable(struct vop2_win *win) -- cgit v1.2.3