matrox/engine/mga_maventv.c

26 // FIXME: try to setup the CRTC2 in interlaced mode for the video modes
88 	/* if some dualhead mode is active, an extra restriction might apply */
111 		/* upper limit is given by pins in combination with current active mode */
284 	 * for PAL and NTSC mode. */
298 /* Preset maven PAL output (625lines, 50Hz mode) */
452 /* Preset maven NTSC output (525lines, 59.94Hz mode) */
661 	/* preset new TVout mode */
675 	/* enter mode-program mode */
683 	/* tune new TVout mode */
686 		/* setup TV-mode 'copy' of CRTC2, setup PLL, inputs, outputs and sync-locks */
717 		/* modify mode to center and size correctly on TV */
721 			bool tweak = false; /* needed for NTSC VCD mode */
725 				LOG(4,("MAVENTV: setting underscanning ('downscaled') desktop mode\n"));
727 				/* adapt mode to underscan correctly */
765 				uint16 mode =
768 				LOG(4,("MAVENTV: setting overscanning ('unscaled') video mode\n"));
771 				switch (mode)
773 				case ((TV_NTSC << (14 - 9)) | 640): /* NTSC VCD mode */
779 					 * tweaking to get a mode we can work with that still has the
781 					 * This mode has just a little bit horizontal overscanning. */
784 				case ((TV_NTSC << (14 - 9)) | 720): /* NTSC DVD mode */
790 				case ((TV_PAL << (14 - 9)) | 768): /* PAL VCD mode */
794 				case ((TV_PAL << (14 - 9)) | 720): /* PAL DVD mode */
799 					/* non-standard mode: just hope for he best. */
829 					/* NTSC VCD mode needs to be scaled down vertically to get correct
844 					/* ...NTSC VCD mode needs to be moved up to center the tweaked mode
849 					/* note: might be visible in the NTSC VCD Video mode */
877 				/* ...and finally the NTSC VCD mode needs to be moved to the right to
878 				 * center the tweaked mode correctly. */
1176 		 * this can be done in the normal way because the MAVEN works in slave mode!
1190 			/* copy result to MAVEN TV mode */
1197 			 * is in fact a 'half pixelclock' period compared to monitor mode use. */
1207 			/* adjust mode to actually used pixelclock */
1232 			/* copy result to MAVEN TV mode */
1279 			/* copy result to MAVEN TV mode */
1376 		/* connect DAC1 to CON1, CRTC2/'DAC2' to CON2 (TVout mode) */
1380 	/* program new TVout mode */
1394 	/* leave mode-program mode */