drm/msm/dpu: enable writeback on SC8108X

Enable WB2 hardware block, enabling writeback support on this platform.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/570196/
Link: https://lore.kernel.org/r/20231203003203.1293087-3-dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_1_sc8180x.h

@@ -33,6 +33,7 @@ static const struct dpu_mdp_cfg sc8180x_mdp = {
 		[DPU_CLK_CTRL_DMA1] = { .reg_off = 0x2b4, .bit_off = 8 },
 		[DPU_CLK_CTRL_DMA2] = { .reg_off = 0x2bc, .bit_off = 8 },
 		[DPU_CLK_CTRL_DMA3] = { .reg_off = 0x2c4, .bit_off = 8 },
+		[DPU_CLK_CTRL_WB2] = { .reg_off = 0x2bc, .bit_off = 16 },
 	},
 };
 
@@ -297,6 +298,21 @@ static const struct dpu_dsc_cfg sc8180x_dsc[] = {
 	},
 };
 
+static const struct dpu_wb_cfg sc8180x_wb[] = {
+	{
+		.name = "wb_2", .id = WB_2,
+		.base = 0x65000, .len = 0x2c8,
+		.features = WB_SDM845_MASK,
+		.format_list = wb2_formats_rgb,
+		.num_formats = ARRAY_SIZE(wb2_formats_rgb),
+		.clk_ctrl = DPU_CLK_CTRL_WB2,
+		.xin_id = 6,
+		.vbif_idx = VBIF_RT,
+		.maxlinewidth = 4096,
+		.intr_wb_done = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 4),
+	},
+};
+
 static const struct dpu_intf_cfg sc8180x_intf[] = {
 	{
 		.name = "intf_0", .id = INTF_0,
@@ -410,6 +426,8 @@ const struct dpu_mdss_cfg dpu_sc8180x_cfg = {
 	.pingpong = sc8180x_pp,
 	.merge_3d_count = ARRAY_SIZE(sc8180x_merge_3d),
 	.merge_3d = sc8180x_merge_3d,
+	.wb_count = ARRAY_SIZE(sc8180x_wb),
+	.wb = sc8180x_wb,
 	.intf_count = ARRAY_SIZE(sc8180x_intf),
 	.intf = sc8180x_intf,
 	.vbif_count = ARRAY_SIZE(sdm845_vbif),