171 	 * On Gen2 use the alpha channel (extended to 8 bits) when available or  in rpf_configure_stream()
172 	 * a fixed alpha value set through the V4L2_CID_ALPHA_COMPONENT control  in rpf_configure_stream()
175 	 * The Gen3+ RPF has extended alpha capability and can both multiply the  in rpf_configure_stream()
176 	 * alpha channel by a fixed global alpha value, and multiply the pixel  in rpf_configure_stream()
177 	 * components to convert the input to premultiplied alpha.  in rpf_configure_stream()
179 	 * As alpha premultiplication is available in the BRx for both Gen2 and  in rpf_configure_stream()
180 	 * Gen3+ we handle it there and use the Gen3 alpha multiplier for global  in rpf_configure_stream()
181 	 * alpha multiplication only. This however prevents conversion to  in rpf_configure_stream()
182 	 * premultiplied alpha if no BRx is present in the pipeline. If that use  in rpf_configure_stream()
186 	 * We enable alpha multiplication on Gen3+ using the fixed alpha value  in rpf_configure_stream()
188 	 * contains an alpha channel. On Gen2 the global alpha is ignored in  in rpf_configure_stream()
194 		       (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED  in rpf_configure_stream()
200 		if (fmtinfo->alpha) {  in rpf_configure_stream()
202 			 * When the input contains an alpha channel enable the  in rpf_configure_stream()
203 			 * alpha multiplier. If the input is premultiplied we  in rpf_configure_stream()
204 			 * need to multiply both the alpha channel and the pixel  in rpf_configure_stream()
205 			 * components by the global alpha value to keep them  in rpf_configure_stream()
206 			 * premultiplied. Otherwise multiply the alpha channel  in rpf_configure_stream()
218 			 * When the input doesn't contain an alpha channel the  in rpf_configure_stream()
219 			 * global alpha value is applied in the unpacking unit,  in rpf_configure_stream()
220 			 * the alpha multiplier isn't needed and must be  in rpf_configure_stream()
273 		       rpf->alpha << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);  in rpf_configure_frame()
275 		       (rpf->alpha << VI6_RPF_MULT_ALPHA_RATIO_SHIFT));  in rpf_configure_frame()
277 	vsp1_pipeline_propagate_alpha(pipe, dlb, rpf->alpha);  in rpf_configure_frame()