[PATCH 07/15] drm/rockchip: dw-mipi-dsi: add support for rk3368-variant

[Heiko Stuebner]

Add the compatible and grf values and allow the driver to also
not select a specific crtc input on systems with only one vop.

Signed-off-by: Heiko Stuebner <heiko at sntech.de>
---
 .../display/rockchip/dw_mipi_dsi_rockchip.txt |  1 +
 .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c   | 25 +++++++++++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
index 6bb59ab39f2f..869fbc256d51 100644
--- a/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
+++ b/Documentation/devicetree/bindings/display/rockchip/dw_mipi_dsi_rockchip.txt
@@ -5,6 +5,7 @@ Required properties:
 - #address-cells: Should be <1>.
 - #size-cells: Should be <0>.
 - compatible: "rockchip,rk3288-mipi-dsi", "snps,dw-mipi-dsi".
+	      "rockchip,rk3368-mipi-dsi", "snps,dw-mipi-dsi".
 	      "rockchip,rk3399-mipi-dsi", "snps,dw-mipi-dsi".
 - reg: Represent the physical address range of the controller.
 - interrupts: Represent the controller's interrupt to the CPU(s).
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 7ee359bcee62..041647bfce71 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -142,6 +142,11 @@
 #define RK3288_DSI0_LCDC_SEL		BIT(6)
 #define RK3288_DSI1_LCDC_SEL		BIT(9)
 
+#define RK3368_GRF_SOC_CON7		0x41c
+#define RK3368_DSI_TURNDISABLE		BIT(5)
+#define RK3368_DSI_FORCERXMODE		BIT(6)
+#define RK3368_DSI_FORCETXSTOPMODE	(0xf << 7)
+
 #define RK3399_GRF_SOC_CON20		0x6250
 #define RK3399_DSI0_LCDC_SEL		BIT(0)
 #define RK3399_DSI1_LCDC_SEL		BIT(4)
@@ -192,7 +197,7 @@ enum {
 struct rockchip_dw_dsi_chip_data {
 	u32 reg;
 
-	u32 lcdsel_grf_reg;
+	int lcdsel_grf_reg;
 	u32 lcdsel_big;
 	u32 lcdsel_lit;
 
@@ -566,7 +571,7 @@ static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
 static void dw_mipi_dsi_rockchip_config(struct dw_mipi_dsi_rockchip *dsi,
 					int mux)
 {
-	if (dsi->cdata->lcdsel_grf_reg)
+	if (dsi->cdata->lcdsel_grf_reg >= 0)
 		regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
 			mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
 
@@ -1008,6 +1013,19 @@ static const struct rockchip_dw_dsi_chip_data rk3288_chip_data[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rockchip_dw_dsi_chip_data rk3368_chip_data[] = {
+	{
+		.reg = 0xff960000,
+		.lcdsel_grf_reg = -1,
+		.lanecfg1_grf_reg = RK3368_GRF_SOC_CON7,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3368_DSI_TURNDISABLE |
+					     RK3368_DSI_FORCERXMODE |
+					     RK3368_DSI_FORCETXSTOPMODE),
+		.max_data_lanes = 4,
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rockchip_dw_dsi_chip_data rk3399_chip_data[] = {
 	{
 		.reg = 0xff960000,
@@ -1058,6 +1076,9 @@ static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
 	{
 	 .compatible = "rockchip,rk3288-mipi-dsi",
 	 .data = &rk3288_chip_data,
+	}, {
+	 .compatible = "rockchip,rk3368-mipi-dsi",
+	 .data = &rk3368_chip_data,
 	}, {
 	 .compatible = "rockchip,rk3399-mipi-dsi",
 	 .data = &rk3399_chip_data,
-- 
2.19.2