178 	u32 blending[2];  in tegra_plane_setup_blending_legacy()  local
181 	/* disable blending for non-overlapping case */  in tegra_plane_setup_blending_legacy()
189 		 * Since custom fix-weight blending isn't utilized and weight  in tegra_plane_setup_blending_legacy()
191 		 * blending which in this case results in transparent bottom  in tegra_plane_setup_blending_legacy()
193 		 * alpha blending, then bottom window is getting alpha value  in tegra_plane_setup_blending_legacy()
208 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
209 			    state->blending[1].alpha)  in tegra_plane_setup_blending_legacy()
219 		 * Enable alpha blending if pixel format has an alpha  in tegra_plane_setup_blending_legacy()
231 			if (state->blending[i].alpha &&  in tegra_plane_setup_blending_legacy()
232 			    state->blending[i].top)  in tegra_plane_setup_blending_legacy()
238 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
239 			    state->blending[1].alpha)  in tegra_plane_setup_blending_legacy()
249 			if (state->blending[0].alpha &&  in tegra_plane_setup_blending_legacy()
250 			    state->blending[0].top)  in tegra_plane_setup_blending_legacy()
253 			if (state->blending[1].alpha &&  in tegra_plane_setup_blending_legacy()
254 			    state->blending[1].top)  in tegra_plane_setup_blending_legacy()
270 		 * matching the order of blending[...] state indices,  in tegra_plane_setup_blending_legacy()
273 		if (!state->blending[0].top && state->blending[1].top) {  in tegra_plane_setup_blending_legacy()
274 			blending[0] = foreground;  in tegra_plane_setup_blending_legacy()
275 			blending[1] = background[1];  in tegra_plane_setup_blending_legacy()
277 			blending[0] = background[0];  in tegra_plane_setup_blending_legacy()
278 			blending[1] = foreground;  in tegra_plane_setup_blending_legacy()
281 		tegra_plane_writel(plane, blending[0], DC_WIN_BLEND_2WIN_X);  in tegra_plane_setup_blending_legacy()
282 		tegra_plane_writel(plane, blending[1], DC_WIN_BLEND_2WIN_Y);  in tegra_plane_setup_blending_legacy()
651 	 * be emulated by disabling alpha blending for the plane.  in tegra_plane_atomic_check()