drm/msm/dpu: inline dpu_encoder_get_wb()

The function dpu_encoder_get_wb() returns controller_id if the
corresponding WB is present in the catalog. We can inline this function
and rely on dpu_rm_get_wb() returning NULL for indices for which the
WB is not present on the device.
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Patchwork: https://patchwork.freedesktop.org/patch/540634/
Link: https://lore.kernel.org/r/20230601172236.564445-5-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -1288,22 +1288,6 @@ static enum dpu_intf dpu_encoder_get_intf(const struct dpu_mdss_cfg *catalog,
 	return INTF_MAX;
 }
 
-static enum dpu_wb dpu_encoder_get_wb(const struct dpu_mdss_cfg *catalog,
-		enum dpu_intf_type type, u32 controller_id)
-{
-	int i = 0;
-
-	if (type != INTF_WB)
-		return WB_MAX;
-
-	for (i = 0; i < catalog->wb_count; i++) {
-		if (catalog->wb[i].id == controller_id)
-			return catalog->wb[i].id;
-	}
-
-	return WB_MAX;
-}
-
 void dpu_encoder_vblank_callback(struct drm_encoder *drm_enc,
 		struct dpu_encoder_phys *phy_enc)
 {
@@ -2324,7 +2308,6 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
 		 */
 		u32 controller_id = disp_info->h_tile_instance[i];
 		enum dpu_intf intf_idx;
-		enum dpu_wb wb_idx;
 
 		if (disp_info->num_of_h_tiles > 1) {
 			if (i == 0)
@@ -2342,14 +2325,11 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
 							    disp_info->intf_type,
 							    controller_id);
 
-		wb_idx = dpu_encoder_get_wb(dpu_kms->catalog,
-				disp_info->intf_type, controller_id);
-
 		if (intf_idx >= INTF_0 && intf_idx < INTF_MAX)
 			phys_params.hw_intf = dpu_rm_get_intf(&dpu_kms->rm, intf_idx);
 
-		if (wb_idx >= WB_0 && wb_idx < WB_MAX)
-			phys_params.hw_wb = dpu_rm_get_wb(&dpu_kms->rm, wb_idx);
+		if (disp_info->intf_type == INTF_WB && controller_id < WB_MAX)
+			phys_params.hw_wb = dpu_rm_get_wb(&dpu_kms->rm, controller_id);
 
 		if (!phys_params.hw_intf && !phys_params.hw_wb) {
 			DPU_ERROR_ENC(dpu_enc, "no intf or wb block assigned at idx: %d\n", i);