drm/msm/dpu: move PINGPONG_NONE check to dpu_lm_init()

Move the check for lm->pingpong being not NONE from dpu_rm_init() to
dpu_lm_init(), following the change to dpu_hw_intf_init().
Suggested-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/538206/
Link: https://lore.kernel.org/r/20230519234025.2864377-5-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.c

@@ -161,6 +161,11 @@ struct dpu_hw_mixer *dpu_hw_lm_init(const struct dpu_lm_cfg *cfg,
 {
 	struct dpu_hw_mixer *c;
 
+	if (cfg->pingpong == PINGPONG_NONE) {
+		DPU_DEBUG("skip mixer %d without pingpong\n", cfg->id);
+		return NULL;
+	}
+
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);

drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c

@@ -117,11 +117,6 @@ int dpu_rm_init(struct dpu_rm *rm,
 		struct dpu_hw_mixer *hw;
 		const struct dpu_lm_cfg *lm = &cat->mixer[i];
 
-		if (lm->pingpong == PINGPONG_NONE) {
-			DPU_DEBUG("skip mixer %d without pingpong\n", lm->id);
-			continue;
-		}
-
 		hw = dpu_hw_lm_init(lm, mmio);
 		if (IS_ERR(hw)) {
 			rc = PTR_ERR(hw);