[PATCH] drm/rockchip: dsi: Fix VOP selection on SoCs that support it

[Ondrej Jirman]

lcdsel_grf_reg is defined as u32, so "< 0" comaprison is always false,
which breaks VOP selection on eg. RK3399. Compare against 0.

Fixes: f3aaa6125b6f ("drm/rockchip: dsi: add rk3568 support")
Signed-off-by: Ondrej Jirman <m...@xff.cz>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c 
b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 7d50a4f463d9..2982a4e9a6ed 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -760,7 +760,7 @@ static void dw_mipi_dsi_rockchip_config(struct 
dw_mipi_dsi_rockchip *dsi)
 static void dw_mipi_dsi_rockchip_set_lcdsel(struct dw_mipi_dsi_rockchip *dsi,
                                            int mux)
 {
-       if (dsi->cdata->lcdsel_grf_reg < 0)
+       if (dsi->cdata->lcdsel_grf_reg)
                regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
                        mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
 }
@@ -1643,7 +1643,6 @@ static const struct rockchip_dw_dsi_chip_data 
rk3399_chip_data[] = {
 static const struct rockchip_dw_dsi_chip_data rk3568_chip_data[] = {
        {
                .reg = 0xfe060000,
-               .lcdsel_grf_reg = -1,
                .lanecfg1_grf_reg = RK3568_GRF_VO_CON2,
                .lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI0_SKEWCALHS |
                                          RK3568_DSI0_FORCETXSTOPMODE |
@@ -1653,7 +1652,6 @@ static const struct rockchip_dw_dsi_chip_data 
rk3568_chip_data[] = {
        },
        {
                .reg = 0xfe070000,
-               .lcdsel_grf_reg = -1,
                .lanecfg1_grf_reg = RK3568_GRF_VO_CON3,
                .lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI1_SKEWCALHS |
                                          RK3568_DSI1_FORCETXSTOPMODE |
-- 
2.38.1