drm/rockchip: dsi: Add support for RK3128

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>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240509140653.168591-6-knaerzche@gmail.com

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 4cc8ed8f4fbd4c216bf7bb51f3888c134b287b77..58a44af0e9ad598db3d939ebd502cc4d2b1696d1 100644 (file)
--- 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)
@@ -1493,6 +1498,18 @@ 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,
@@ -1670,6 +1687,9 @@ 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,