accelerants/neomagic/ProposeDisplayMode.c

54  * returns B_BAD_VALUE. It's called by the OS with target, low and high set to
63  * The target mode should be modified to correspond to the mode as it can be made. */
64 status_t PROPOSE_DISPLAY_MODE(display_mode *target, const display_mode *low, const display_mode *high)
72 	double target_refresh = ((double)target->timing.pixel_clock * 1000.0) /
74 				(double)target->timing.h_total *
75 				(double)target->timing.v_total
78 		want_same_width = target->timing.h_display == target->virtual_width,
79 		want_same_height = target->timing.v_display == target->virtual_height;
82 									target->virtual_width, target->virtual_height));
111 				target->timing.h_display==valid_mode_list[i].h_display &&
112 				target->timing.v_display==valid_mode_list[i].v_display
116 					abs(valid_mode_list[i].pixel_clock-target->timing.pixel_clock)<
117 					abs(closest_mode_clock-target->timing.pixel_clock)
133 			target->timing=valid_mode_list[closest_mode_ptr];
134 			target_refresh = ((double)target->timing.pixel_clock * 1000.0) /  /*I require this refresh*/
135 			((double)target->timing.h_total * (double)target->timing.v_total);
141 	if ((si->ps.card_type == NM2070) && (target->space == B_RGB24_LITTLE))
150 		&target->timing.h_display, &target->timing.h_sync_start, &target->timing.h_sync_end, &target->timing.h_total,
151 		&target->timing.v_display, &target->timing.v_sync_start, &target->timing.v_sync_end, &target->timing.v_total
160 	if ((target->timing.h_display > target->virtual_width) || want_same_width)
161 		target->virtual_width = target->timing.h_display;
162 	if ((target->timing.v_display > target->virtual_height) || want_same_height)
163 		target->virtual_height = target->timing.v_display;
166 	result = nm_general_validate_pic_size (target, &row_bytes, &acc_mode);
174 	if ((target->virtual_width < low->virtual_width) ||
175 		(target->virtual_width > high->virtual_width))
182 	if ((target->timing.h_display < low->timing.h_display) ||
183 		(target->timing.h_display > high->timing.h_display) ||
184 		(target->timing.h_sync_start < low->timing.h_sync_start) ||
185 		(target->timing.h_sync_start > high->timing.h_sync_start) ||
186 		(target->timing.h_sync_end < low->timing.h_sync_end) ||
187 		(target->timing.h_sync_end > high->timing.h_sync_end) ||
188 		(target->timing.h_total < low->timing.h_total) ||
189 		(target->timing.h_total > high->timing.h_total))
192 		if ((target->timing.h_display < low->timing.h_display) ||
193 			(target->timing.h_display > high->timing.h_display))
202 		(target->timing.v_display < low->timing.v_display) ||
203 		(target->timing.v_display > high->timing.v_display) ||
204 		(target->timing.v_sync_start < low->timing.v_sync_start) ||
205 		(target->timing.v_sync_start > high->timing.v_sync_start) ||
206 		(target->timing.v_sync_end < low->timing.v_sync_end) ||
207 		(target->timing.v_sync_end > high->timing.v_sync_end) ||
208 		(target->timing.v_total < low->timing.v_total) ||
209 		(target->timing.v_total > high->timing.v_total)
213 		if ((target->timing.v_display < low->timing.v_display) ||
214 			(target->timing.v_display > high->timing.v_display))
222 	target->timing.pixel_clock = target_refresh * ((double)target->timing.h_total) * ((double)target->timing.v_total) / 1000.0;
224 	/* Now find the nearest valid pixelclock we actually can setup for the target mode,
226 	result = nm_dac_pix_pll_find(*target,&pix_clock_found,&m,&n,&p);
227 	/* update the target mode */
228 	target->timing.pixel_clock = (pix_clock_found * 1000);
231 	if ((target->timing.pixel_clock < low->timing.pixel_clock) ||
232 		(target->timing.pixel_clock > high->timing.pixel_clock)
236 		if ((target->timing.pixel_clock < (low->timing.pixel_clock - 1000)) ||
237 			(target->timing.pixel_clock > (high->timing.pixel_clock + 1000)))
248 	if ((row_bytes * target->virtual_height) >
251 		target->virtual_height =
254 	if (target->virtual_height < target->timing.v_display)
260 		target->virtual_width, target->virtual_height));
262 	if ((target->virtual_height < low->virtual_height) ||
263 		(target->virtual_height > high->virtual_height))
270 	LOG(1, ("PROPOSEMODE: initial modeflags: $%08x\n", target->flags));
276 	target->flags &=
284 	target->flags |= (B_PARALLEL_ACCESS | B_8_BIT_DAC | B_DPMS | B_SCROLL);
287 	if (!(target->flags & DUALHEAD_CAPABLE))
289 		target->flags &= ~DUALHEAD_BITS;
293 	if (!(target->flags & TV_CAPABLE))
295 		target->flags &= ~TV_BITS;
299 	target->flags |= TV_PRIMARY;
303 		target->flags |= B_HARDWARE_CURSOR;
307 		target->flags |= B_SUPPORTS_OVERLAYS;
309 	LOG(1, ("PROPOSEMODE: validated modeflags: $%08x\n", target->flags));
313 	target->timing.flags &= ~(B_BLANK_PEDESTAL | B_TIMING_INTERLACED | B_SYNC_ON_GREEN);
382 			/* set target values */