drm/msm: add DSI support for sc7180

Add support for v2.4.1 DSI block in the sc7180 SoC.

Changes in v1:
	-Modify commit text to indicate DSI version and SOC detail(Jeffrey Hugo).
	-Splitting visionox panel driver code out into a
	 different patch(set), since panel drivers are merged into
	 drm-next via a different tree(Rob Clark).
Changes in v2:
	-Update commit text accordingly(Matthias Kaehlcke).
Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
[cleanup subject / commit message]
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/dsi/dsi_cfg.c

@@ -153,6 +153,10 @@ static const char * const dsi_sdm845_bus_clk_names[] = {
 	"iface", "bus",
 };
 
+static const char * const dsi_sc7180_bus_clk_names[] = {
+	"iface", "bus",
+};
+
 static const struct msm_dsi_config sdm845_dsi_cfg = {
 	.io_offset = DSI_6G_REG_SHIFT,
 	.reg_cfg = {
@@ -167,6 +171,20 @@ static const struct msm_dsi_config sdm845_dsi_cfg = {
 	.num_dsi = 2,
 };
 
+static const struct msm_dsi_config sc7180_dsi_cfg = {
+	.io_offset = DSI_6G_REG_SHIFT,
+	.reg_cfg = {
+		.num = 1,
+		.regs = {
+			{"vdda", 21800, 4 },	/* 1.2 V */
+		},
+	},
+	.bus_clk_names = dsi_sc7180_bus_clk_names,
+	.num_bus_clks = ARRAY_SIZE(dsi_sc7180_bus_clk_names),
+	.io_start = { 0xae94000 },
+	.num_dsi = 1,
+};
+
 static const struct msm_dsi_host_cfg_ops msm_dsi_v2_host_ops = {
 	.link_clk_set_rate = dsi_link_clk_set_rate_v2,
 	.link_clk_enable = dsi_link_clk_enable_v2,
@@ -226,6 +244,9 @@ static const struct msm_dsi_cfg_handler dsi_cfg_handlers[] = {
 		&msm8998_dsi_cfg, &msm_dsi_6g_v2_host_ops},
 	{MSM_DSI_VER_MAJOR_6G, MSM_DSI_6G_VER_MINOR_V2_2_1,
 		&sdm845_dsi_cfg, &msm_dsi_6g_v2_host_ops},
+	{MSM_DSI_VER_MAJOR_6G, MSM_DSI_6G_VER_MINOR_V2_4_1,
+		&sc7180_dsi_cfg, &msm_dsi_6g_v2_host_ops},
+
 };
 
 const struct msm_dsi_cfg_handler *msm_dsi_cfg_get(u32 major, u32 minor)

drivers/gpu/drm/msm/dsi/dsi_cfg.h

@@ -20,6 +20,7 @@
 #define MSM_DSI_6G_VER_MINOR_V1_4_2	0x10040002
 #define MSM_DSI_6G_VER_MINOR_V2_2_0	0x20000000
 #define MSM_DSI_6G_VER_MINOR_V2_2_1	0x20020001
+#define MSM_DSI_6G_VER_MINOR_V2_4_1	0x20040001
 
 #define MSM_DSI_V2_VER_MINOR_8064	0x0