[PATCH v2 5/7] drm/rockchip: dsi: Add support for RK3128

[Alex Bee <knaerzche@gmail.com>]

The DesignWare MIPI DSI controller found RK3128 SoCs supports up to 4 DSI
data lanes. Similar to PX30/RK356x/RV1126 it uses an external D-PHY.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
---
changes since v1:
 - none

 .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c   | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 6ed64cc35275..17fd5260218a 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -153,6 +153,11 @@
 #define PX30_DSI_TURNDISABLE		BIT(5)
 #define PX30_DSI_LCDC_SEL		BIT(0)
 
+#define RK3128_GRF_LVDS_CON0		0x0150
+#define RK3128_DSI_FORCETXSTOPMODE	GENMASK(13, 10)
+#define RK3128_DSI_FORCERXMODE		BIT(9)
+#define RK3128_DSI_TURNDISABLE		BIT(8)
+
 #define RK3288_GRF_SOC_CON6		0x025c
 #define RK3288_DSI0_LCDC_SEL		BIT(6)
 #define RK3288_DSI1_LCDC_SEL		BIT(9)
@@ -1518,6 +1523,18 @@ static const struct rockchip_dw_dsi_chip_data px30_chip_data[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rockchip_dw_dsi_chip_data rk3128_chip_data[] = {
+	{
+		.reg = 0x10110000,
+		.lanecfg1_grf_reg = RK3128_GRF_LVDS_CON0,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3128_DSI_TURNDISABLE |
+					     RK3128_DSI_FORCERXMODE |
+					     RK3128_DSI_FORCETXSTOPMODE),
+		.max_data_lanes = 4,
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rockchip_dw_dsi_chip_data rk3288_chip_data[] = {
 	{
 		.reg = 0xff960000,
@@ -1695,6 +1712,9 @@ static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
 	{
 	 .compatible = "rockchip,px30-mipi-dsi",
 	 .data = &px30_chip_data,
+	}, {
+	 .compatible = "rockchip,rk3128-mipi-dsi",
+	 .data = &rk3128_chip_data,
 	}, {
 	 .compatible = "rockchip,rk3288-mipi-dsi",
 	 .data = &rk3288_chip_data,
-- 
2.43.2