[PATCH] drm/rockchip: vop2: Use regcache_sync() to fix suspend/resume

[Sascha Hauer]

afa965a45e01 ("drm/rockchip: vop2: fix suspend/resume") uses
regmap_reinit_cache() to fix the suspend/resume issue with the VOP2
driver. During discussion it came up that we should rather use
regcache_sync() instead. As the original patch is already applied
fix this up in this follow-up patch.

Fixes: afa965a45e01 ("drm/rockchip: vop2: fix suspend/resume")
Cc: sta...@vger.kernel.org
Link: https://lore.kernel.org/r/20230417094215.2049231-1-s.ha...@pengutronix.de
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c 
b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index d9daa686b014d..293c228a83f90 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -215,8 +215,6 @@ struct vop2 {
        struct vop2_win win[];
 };
 
-static const struct regmap_config vop2_regmap_config;
-
 static struct vop2_video_port *to_vop2_video_port(struct drm_crtc *crtc)
 {
        return container_of(crtc, struct vop2_video_port, crtc);
@@ -841,11 +839,7 @@ static void vop2_enable(struct vop2 *vop2)
                return;
        }
 
-       ret = regmap_reinit_cache(vop2->map, &vop2_regmap_config);
-       if (ret) {
-               drm_err(vop2->drm, "failed to reinit cache: %d\n", ret);
-               return;
-       }
+       regcache_sync(vop2->map);
 
        if (vop2->data->soc_id == 3566)
                vop2_writel(vop2, RK3568_OTP_WIN_EN, 1);
@@ -875,6 +869,8 @@ static void vop2_disable(struct vop2 *vop2)
 
        pm_runtime_put_sync(vop2->dev);
 
+       regcache_mark_dirty(vop2->map);
+
        clk_disable_unprepare(vop2->aclk);
        clk_disable_unprepare(vop2->hclk);
 }
-- 
2.39.2