172 	u32 blending[2];  in tegra_plane_setup_blending_legacy()  local
175 	/* disable blending for non-overlapping case */  in tegra_plane_setup_blending_legacy()
183 		 * Since custom fix-weight blending isn't utilized and weight  in tegra_plane_setup_blending_legacy()
185 		 * blending which in this case results in transparent bottom  in tegra_plane_setup_blending_legacy()
187 		 * alpha blending, then bottom window is getting alpha value  in tegra_plane_setup_blending_legacy()
202 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
203 			    state->blending[1].alpha)  in tegra_plane_setup_blending_legacy()
213 		 * Enable alpha blending if pixel format has an alpha  in tegra_plane_setup_blending_legacy()
225 			if (state->blending[i].alpha &&  in tegra_plane_setup_blending_legacy()
226 			    state->blending[i].top)  in tegra_plane_setup_blending_legacy()
232 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
233 			    state->blending[1].alpha)  in tegra_plane_setup_blending_legacy()
243 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
244 			    state->blending[0].top)  in tegra_plane_setup_blending_legacy()
247 			if (state->blending[1].alpha &&  in tegra_plane_setup_blending_legacy()
248 			    state->blending[1].top)  in tegra_plane_setup_blending_legacy()
264 		 * matching the order of blending[...] state indices,  in tegra_plane_setup_blending_legacy()
267 		if (!state->blending[0].top && state->blending[1].top) {  in tegra_plane_setup_blending_legacy()
268 			blending[0] = foreground;  in tegra_plane_setup_blending_legacy()
269 			blending[1] = background[1];  in tegra_plane_setup_blending_legacy()
271 			blending[0] = background[0];  in tegra_plane_setup_blending_legacy()
272 			blending[1] = foreground;  in tegra_plane_setup_blending_legacy()
275 		tegra_plane_writel(plane, blending[0], DC_WIN_BLEND_2WIN_X);  in tegra_plane_setup_blending_legacy()
276 		tegra_plane_writel(plane, blending[1], DC_WIN_BLEND_2WIN_Y);  in tegra_plane_setup_blending_legacy()
641 	 * be emulated by disabling alpha blending for the plane.  in tegra_plane_atomic_check()