drm/msm/dpu: enable DPU_CTL_SPLIT_DISPLAY for sc8280xp

Theoretically, since sm8150 we should be using a single CTL for the
split panel case, but since we do not support it for now, fallback to
DPU_CTL_SPLIT_DISPLAY.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/531489/
Link: https://lore.kernel.org/r/20230408002750.2722304-2-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h

@@ -42,17 +42,18 @@ static const struct dpu_mdp_cfg sc8280xp_mdp[] = {
 	},
 };
 
+/* FIXME: get rid of DPU_CTL_SPLIT_DISPLAY in favour of proper ACTIVE_CTL support */
 static const struct dpu_ctl_cfg sc8280xp_ctl[] = {
 	{
 	.name = "ctl_0", .id = CTL_0,
 	.base = 0x15000, .len = 0x204,
-	.features = CTL_SC7280_MASK,
+	.features = BIT(DPU_CTL_SPLIT_DISPLAY) | CTL_SC7280_MASK,
 	.intr_start = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 9),
 	},
 	{
 	.name = "ctl_1", .id = CTL_1,
 	.base = 0x16000, .len = 0x204,
-	.features = CTL_SC7280_MASK,
+	.features = BIT(DPU_CTL_SPLIT_DISPLAY) | CTL_SC7280_MASK,
 	.intr_start = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 10),
 	},
 	{