1 /*
2  * Copyright 2007-8 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * Authors: Dave Airlie
24  *          Alex Deucher
25  */
26 
27 #include <drm/drm_crtc_helper.h>
28 #include <drm/drm_fb_helper.h>
29 #include <drm/drm_fixed.h>
30 #include <drm/drm_fourcc.h>
31 #include <drm/drm_vblank.h>
32 #include <drm/radeon_drm.h>
33 
34 #include "atom.h"
35 #include "radeon.h"
36 
37 static void radeon_overscan_setup(struct drm_crtc *crtc,
38 				  struct drm_display_mode *mode)
39 {
40 	struct drm_device *dev = crtc->dev;
41 	struct radeon_device *rdev = dev->dev_private;
42 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
43 
44 	WREG32(RADEON_OVR_CLR + radeon_crtc->crtc_offset, 0);
45 	WREG32(RADEON_OVR_WID_LEFT_RIGHT + radeon_crtc->crtc_offset, 0);
46 	WREG32(RADEON_OVR_WID_TOP_BOTTOM + radeon_crtc->crtc_offset, 0);
47 }
48 
49 static void radeon_legacy_rmx_mode_set(struct drm_crtc *crtc,
50 				       struct drm_display_mode *mode)
51 {
52 	struct drm_device *dev = crtc->dev;
53 	struct radeon_device *rdev = dev->dev_private;
54 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
55 	int xres = mode->hdisplay;
56 	int yres = mode->vdisplay;
57 	bool hscale = true, vscale = true;
58 	int hsync_wid;
59 	int vsync_wid;
60 	int hsync_start;
61 	int blank_width;
62 	u32 scale, inc, crtc_more_cntl;
63 	u32 fp_horz_stretch, fp_vert_stretch, fp_horz_vert_active;
64 	u32 fp_h_sync_strt_wid, fp_crtc_h_total_disp;
65 	u32 fp_v_sync_strt_wid, fp_crtc_v_total_disp;
66 	struct drm_display_mode *native_mode = &radeon_crtc->native_mode;
67 
68 	fp_vert_stretch = RREG32(RADEON_FP_VERT_STRETCH) &
69 		(RADEON_VERT_STRETCH_RESERVED |
70 		 RADEON_VERT_AUTO_RATIO_INC);
71 	fp_horz_stretch = RREG32(RADEON_FP_HORZ_STRETCH) &
72 		(RADEON_HORZ_FP_LOOP_STRETCH |
73 		 RADEON_HORZ_AUTO_RATIO_INC);
74 
75 	crtc_more_cntl = 0;
76 	if ((rdev->family == CHIP_RS100) ||
77 	    (rdev->family == CHIP_RS200)) {
78 		/* This is to workaround the asic bug for RMX, some versions
79 		   of BIOS dosen't have this register initialized correctly. */
80 		crtc_more_cntl |= RADEON_CRTC_H_CUTOFF_ACTIVE_EN;
81 	}
82 
83 
84 	fp_crtc_h_total_disp = ((((mode->crtc_htotal / 8) - 1) & 0x3ff)
85 				| ((((mode->crtc_hdisplay / 8) - 1) & 0x1ff) << 16));
86 
87 	hsync_wid = (mode->crtc_hsync_end - mode->crtc_hsync_start) / 8;
88 	if (!hsync_wid)
89 		hsync_wid = 1;
90 	hsync_start = mode->crtc_hsync_start - 8;
91 
92 	fp_h_sync_strt_wid = ((hsync_start & 0x1fff)
93 			      | ((hsync_wid & 0x3f) << 16)
94 			      | ((mode->flags & DRM_MODE_FLAG_NHSYNC)
95 				 ? RADEON_CRTC_H_SYNC_POL
96 				 : 0));
97 
98 	fp_crtc_v_total_disp = (((mode->crtc_vtotal - 1) & 0xffff)
99 				| ((mode->crtc_vdisplay - 1) << 16));
100 
101 	vsync_wid = mode->crtc_vsync_end - mode->crtc_vsync_start;
102 	if (!vsync_wid)
103 		vsync_wid = 1;
104 
105 	fp_v_sync_strt_wid = (((mode->crtc_vsync_start - 1) & 0xfff)
106 			      | ((vsync_wid & 0x1f) << 16)
107 			      | ((mode->flags & DRM_MODE_FLAG_NVSYNC)
108 				 ? RADEON_CRTC_V_SYNC_POL
109 				 : 0));
110 
111 	fp_horz_vert_active = 0;
112 
113 	if (native_mode->hdisplay == 0 ||
114 	    native_mode->vdisplay == 0) {
115 		hscale = false;
116 		vscale = false;
117 	} else {
118 		if (xres > native_mode->hdisplay)
119 			xres = native_mode->hdisplay;
120 		if (yres > native_mode->vdisplay)
121 			yres = native_mode->vdisplay;
122 
123 		if (xres == native_mode->hdisplay)
124 			hscale = false;
125 		if (yres == native_mode->vdisplay)
126 			vscale = false;
127 	}
128 
129 	switch (radeon_crtc->rmx_type) {
130 	case RMX_FULL:
131 	case RMX_ASPECT:
132 		if (!hscale)
133 			fp_horz_stretch |= ((xres/8-1) << 16);
134 		else {
135 			inc = (fp_horz_stretch & RADEON_HORZ_AUTO_RATIO_INC) ? 1 : 0;
136 			scale = ((xres + inc) * RADEON_HORZ_STRETCH_RATIO_MAX)
137 				/ native_mode->hdisplay + 1;
138 			fp_horz_stretch |= (((scale) & RADEON_HORZ_STRETCH_RATIO_MASK) |
139 					RADEON_HORZ_STRETCH_BLEND |
140 					RADEON_HORZ_STRETCH_ENABLE |
141 					((native_mode->hdisplay/8-1) << 16));
142 		}
143 
144 		if (!vscale)
145 			fp_vert_stretch |= ((yres-1) << 12);
146 		else {
147 			inc = (fp_vert_stretch & RADEON_VERT_AUTO_RATIO_INC) ? 1 : 0;
148 			scale = ((yres + inc) * RADEON_VERT_STRETCH_RATIO_MAX)
149 				/ native_mode->vdisplay + 1;
150 			fp_vert_stretch |= (((scale) & RADEON_VERT_STRETCH_RATIO_MASK) |
151 					RADEON_VERT_STRETCH_ENABLE |
152 					RADEON_VERT_STRETCH_BLEND |
153 					((native_mode->vdisplay-1) << 12));
154 		}
155 		break;
156 	case RMX_CENTER:
157 		fp_horz_stretch |= ((xres/8-1) << 16);
158 		fp_vert_stretch |= ((yres-1) << 12);
159 
160 		crtc_more_cntl |= (RADEON_CRTC_AUTO_HORZ_CENTER_EN |
161 				RADEON_CRTC_AUTO_VERT_CENTER_EN);
162 
163 		blank_width = (mode->crtc_hblank_end - mode->crtc_hblank_start) / 8;
164 		if (blank_width > 110)
165 			blank_width = 110;
166 
167 		fp_crtc_h_total_disp = (((blank_width) & 0x3ff)
168 				| ((((mode->crtc_hdisplay / 8) - 1) & 0x1ff) << 16));
169 
170 		hsync_wid = (mode->crtc_hsync_end - mode->crtc_hsync_start) / 8;
171 		if (!hsync_wid)
172 			hsync_wid = 1;
173 
174 		fp_h_sync_strt_wid = ((((mode->crtc_hsync_start - mode->crtc_hblank_start) / 8) & 0x1fff)
175 				| ((hsync_wid & 0x3f) << 16)
176 				| ((mode->flags & DRM_MODE_FLAG_NHSYNC)
177 					? RADEON_CRTC_H_SYNC_POL
178 					: 0));
179 
180 		fp_crtc_v_total_disp = (((mode->crtc_vblank_end - mode->crtc_vblank_start) & 0xffff)
181 				| ((mode->crtc_vdisplay - 1) << 16));
182 
183 		vsync_wid = mode->crtc_vsync_end - mode->crtc_vsync_start;
184 		if (!vsync_wid)
185 			vsync_wid = 1;
186 
187 		fp_v_sync_strt_wid = ((((mode->crtc_vsync_start - mode->crtc_vblank_start) & 0xfff)
188 					| ((vsync_wid & 0x1f) << 16)
189 					| ((mode->flags & DRM_MODE_FLAG_NVSYNC)
190 						? RADEON_CRTC_V_SYNC_POL
191 						: 0)));
192 
193 		fp_horz_vert_active = (((native_mode->vdisplay) & 0xfff) |
194 				(((native_mode->hdisplay / 8) & 0x1ff) << 16));
195 		break;
196 	case RMX_OFF:
197 	default:
198 		fp_horz_stretch |= ((xres/8-1) << 16);
199 		fp_vert_stretch |= ((yres-1) << 12);
200 		break;
201 	}
202 
203 	WREG32(RADEON_FP_HORZ_STRETCH,      fp_horz_stretch);
204 	WREG32(RADEON_FP_VERT_STRETCH,      fp_vert_stretch);
205 	WREG32(RADEON_CRTC_MORE_CNTL,       crtc_more_cntl);
206 	WREG32(RADEON_FP_HORZ_VERT_ACTIVE,  fp_horz_vert_active);
207 	WREG32(RADEON_FP_H_SYNC_STRT_WID,   fp_h_sync_strt_wid);
208 	WREG32(RADEON_FP_V_SYNC_STRT_WID,   fp_v_sync_strt_wid);
209 	WREG32(RADEON_FP_CRTC_H_TOTAL_DISP, fp_crtc_h_total_disp);
210 	WREG32(RADEON_FP_CRTC_V_TOTAL_DISP, fp_crtc_v_total_disp);
211 }
212 
213 static void radeon_pll_wait_for_read_update_complete(struct drm_device *dev)
214 {
215 	struct radeon_device *rdev = dev->dev_private;
216 	int i = 0;
217 
218 	/* FIXME: Certain revisions of R300 can't recover here.  Not sure of
219 	   the cause yet, but this workaround will mask the problem for now.
220 	   Other chips usually will pass at the very first test, so the
221 	   workaround shouldn't have any effect on them. */
222 	for (i = 0;
223 	     (i < 10000 &&
224 	      RREG32_PLL(RADEON_PPLL_REF_DIV) & RADEON_PPLL_ATOMIC_UPDATE_R);
225 	     i++);
226 }
227 
228 static void radeon_pll_write_update(struct drm_device *dev)
229 {
230 	struct radeon_device *rdev = dev->dev_private;
231 
232 	while (RREG32_PLL(RADEON_PPLL_REF_DIV) & RADEON_PPLL_ATOMIC_UPDATE_R);
233 
234 	WREG32_PLL_P(RADEON_PPLL_REF_DIV,
235 			   RADEON_PPLL_ATOMIC_UPDATE_W,
236 			   ~(RADEON_PPLL_ATOMIC_UPDATE_W));
237 }
238 
239 static void radeon_pll2_wait_for_read_update_complete(struct drm_device *dev)
240 {
241 	struct radeon_device *rdev = dev->dev_private;
242 	int i = 0;
243 
244 
245 	/* FIXME: Certain revisions of R300 can't recover here.  Not sure of
246 	   the cause yet, but this workaround will mask the problem for now.
247 	   Other chips usually will pass at the very first test, so the
248 	   workaround shouldn't have any effect on them. */
249 	for (i = 0;
250 	     (i < 10000 &&
251 	      RREG32_PLL(RADEON_P2PLL_REF_DIV) & RADEON_P2PLL_ATOMIC_UPDATE_R);
252 	     i++);
253 }
254 
255 static void radeon_pll2_write_update(struct drm_device *dev)
256 {
257 	struct radeon_device *rdev = dev->dev_private;
258 
259 	while (RREG32_PLL(RADEON_P2PLL_REF_DIV) & RADEON_P2PLL_ATOMIC_UPDATE_R);
260 
261 	WREG32_PLL_P(RADEON_P2PLL_REF_DIV,
262 			   RADEON_P2PLL_ATOMIC_UPDATE_W,
263 			   ~(RADEON_P2PLL_ATOMIC_UPDATE_W));
264 }
265 
266 static uint8_t radeon_compute_pll_gain(uint16_t ref_freq, uint16_t ref_div,
267 				       uint16_t fb_div)
268 {
269 	unsigned int vcoFreq;
270 
271 	if (!ref_div)
272 		return 1;
273 
274 	vcoFreq = ((unsigned)ref_freq * fb_div) / ref_div;
275 
276 	/*
277 	 * This is horribly crude: the VCO frequency range is divided into
278 	 * 3 parts, each part having a fixed PLL gain value.
279 	 */
280 	if (vcoFreq >= 30000)
281 		/*
282 		 * [300..max] MHz : 7
283 		 */
284 		return 7;
285 	else if (vcoFreq >= 18000)
286 		/*
287 		 * [180..300) MHz : 4
288 		 */
289 		return 4;
290 	else
291 		/*
292 		 * [0..180) MHz : 1
293 		 */
294 		return 1;
295 }
296 
297 static void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
298 {
299 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
300 	struct drm_device *dev = crtc->dev;
301 	struct radeon_device *rdev = dev->dev_private;
302 	uint32_t crtc_ext_cntl = 0;
303 	uint32_t mask;
304 
305 	if (radeon_crtc->crtc_id)
306 		mask = (RADEON_CRTC2_DISP_DIS |
307 			RADEON_CRTC2_VSYNC_DIS |
308 			RADEON_CRTC2_HSYNC_DIS |
309 			RADEON_CRTC2_DISP_REQ_EN_B);
310 	else
311 		mask = (RADEON_CRTC_DISPLAY_DIS |
312 			RADEON_CRTC_VSYNC_DIS |
313 			RADEON_CRTC_HSYNC_DIS);
314 
315 	/*
316 	 * On all dual CRTC GPUs this bit controls the CRTC of the primary DAC.
317 	 * Therefore it is set in the DAC DMPS function.
318 	 * This is different for GPU's with a single CRTC but a primary and a
319 	 * TV DAC: here it controls the single CRTC no matter where it is
320 	 * routed. Therefore we set it here.
321 	 */
322 	if (rdev->flags & RADEON_SINGLE_CRTC)
323 		crtc_ext_cntl = RADEON_CRTC_CRT_ON;
324 
325 	switch (mode) {
326 	case DRM_MODE_DPMS_ON:
327 		radeon_crtc->enabled = true;
328 		/* adjust pm to dpms changes BEFORE enabling crtcs */
329 		radeon_pm_compute_clocks(rdev);
330 		if (radeon_crtc->crtc_id)
331 			WREG32_P(RADEON_CRTC2_GEN_CNTL, RADEON_CRTC2_EN, ~(RADEON_CRTC2_EN | mask));
332 		else {
333 			WREG32_P(RADEON_CRTC_GEN_CNTL, RADEON_CRTC_EN, ~(RADEON_CRTC_EN |
334 									 RADEON_CRTC_DISP_REQ_EN_B));
335 			WREG32_P(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl, ~(mask | crtc_ext_cntl));
336 		}
337 		if (dev->num_crtcs > radeon_crtc->crtc_id)
338 			drm_crtc_vblank_on(crtc);
339 		radeon_crtc_load_lut(crtc);
340 		break;
341 	case DRM_MODE_DPMS_STANDBY:
342 	case DRM_MODE_DPMS_SUSPEND:
343 	case DRM_MODE_DPMS_OFF:
344 		if (dev->num_crtcs > radeon_crtc->crtc_id)
345 			drm_crtc_vblank_off(crtc);
346 		if (radeon_crtc->crtc_id)
347 			WREG32_P(RADEON_CRTC2_GEN_CNTL, mask, ~(RADEON_CRTC2_EN | mask));
348 		else {
349 			WREG32_P(RADEON_CRTC_GEN_CNTL, RADEON_CRTC_DISP_REQ_EN_B, ~(RADEON_CRTC_EN |
350 										    RADEON_CRTC_DISP_REQ_EN_B));
351 			WREG32_P(RADEON_CRTC_EXT_CNTL, mask, ~(mask | crtc_ext_cntl));
352 		}
353 		radeon_crtc->enabled = false;
354 		/* adjust pm to dpms changes AFTER disabling crtcs */
355 		radeon_pm_compute_clocks(rdev);
356 		break;
357 	}
358 }
359 
360 int radeon_crtc_set_base(struct drm_crtc *crtc, int x, int y,
361 			 struct drm_framebuffer *old_fb)
362 {
363 	return radeon_crtc_do_set_base(crtc, old_fb, x, y, 0);
364 }
365 
366 int radeon_crtc_set_base_atomic(struct drm_crtc *crtc,
367 				struct drm_framebuffer *fb,
368 				int x, int y, enum mode_set_atomic state)
369 {
370 	return radeon_crtc_do_set_base(crtc, fb, x, y, 1);
371 }
372 
373 int radeon_crtc_do_set_base(struct drm_crtc *crtc,
374 			 struct drm_framebuffer *fb,
375 			 int x, int y, int atomic)
376 {
377 	struct drm_device *dev = crtc->dev;
378 	struct radeon_device *rdev = dev->dev_private;
379 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
380 	struct drm_framebuffer *target_fb;
381 	struct drm_gem_object *obj;
382 	struct radeon_bo *rbo;
383 	uint64_t base;
384 	uint32_t crtc_offset, crtc_offset_cntl, crtc_tile_x0_y0 = 0;
385 	uint32_t crtc_pitch, pitch_pixels;
386 	uint32_t tiling_flags;
387 	int format;
388 	uint32_t gen_cntl_reg, gen_cntl_val;
389 	int r;
390 
391 	DRM_DEBUG_KMS("\n");
392 	/* no fb bound */
393 	if (!atomic && !crtc->primary->fb) {
394 		DRM_DEBUG_KMS("No FB bound\n");
395 		return 0;
396 	}
397 
398 	if (atomic)
399 		target_fb = fb;
400 	else
401 		target_fb = crtc->primary->fb;
402 
403 	switch (target_fb->format->cpp[0] * 8) {
404 	case 8:
405 		format = 2;
406 		break;
407 	case 15:      /*  555 */
408 		format = 3;
409 		break;
410 	case 16:      /*  565 */
411 		format = 4;
412 		break;
413 	case 24:      /*  RGB */
414 		format = 5;
415 		break;
416 	case 32:      /* xRGB */
417 		format = 6;
418 		break;
419 	default:
420 		return false;
421 	}
422 
423 	/* Pin framebuffer & get tilling informations */
424 	obj = target_fb->obj[0];
425 	rbo = gem_to_radeon_bo(obj);
426 retry:
427 	r = radeon_bo_reserve(rbo, false);
428 	if (unlikely(r != 0))
429 		return r;
430 	/* Only 27 bit offset for legacy CRTC */
431 	r = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM, 1 << 27,
432 				     &base);
433 	if (unlikely(r != 0)) {
434 		radeon_bo_unreserve(rbo);
435 
436 		/* On old GPU like RN50 with little vram pining can fails because
437 		 * current fb is taking all space needed. So instead of unpining
438 		 * the old buffer after pining the new one, first unpin old one
439 		 * and then retry pining new one.
440 		 *
441 		 * As only master can set mode only master can pin and it is
442 		 * unlikely the master client will race with itself especialy
443 		 * on those old gpu with single crtc.
444 		 *
445 		 * We don't shutdown the display controller because new buffer
446 		 * will end up in same spot.
447 		 */
448 		if (!atomic && fb && fb != crtc->primary->fb) {
449 			struct radeon_bo *old_rbo;
450 			unsigned long nsize, osize;
451 
452 			old_rbo = gem_to_radeon_bo(fb->obj[0]);
453 			osize = radeon_bo_size(old_rbo);
454 			nsize = radeon_bo_size(rbo);
455 			if (nsize <= osize && !radeon_bo_reserve(old_rbo, false)) {
456 				radeon_bo_unpin(old_rbo);
457 				radeon_bo_unreserve(old_rbo);
458 				fb = NULL;
459 				goto retry;
460 			}
461 		}
462 		return -EINVAL;
463 	}
464 	radeon_bo_get_tiling_flags(rbo, &tiling_flags, NULL);
465 	radeon_bo_unreserve(rbo);
466 	if (tiling_flags & RADEON_TILING_MICRO)
467 		DRM_ERROR("trying to scanout microtiled buffer\n");
468 
469 	/* if scanout was in GTT this really wouldn't work */
470 	/* crtc offset is from display base addr not FB location */
471 	radeon_crtc->legacy_display_base_addr = rdev->mc.vram_start;
472 
473 	base -= radeon_crtc->legacy_display_base_addr;
474 
475 	crtc_offset_cntl = 0;
476 
477 	pitch_pixels = target_fb->pitches[0] / target_fb->format->cpp[0];
478 	crtc_pitch = DIV_ROUND_UP(pitch_pixels * target_fb->format->cpp[0] * 8,
479 				  target_fb->format->cpp[0] * 8 * 8);
480 	crtc_pitch |= crtc_pitch << 16;
481 
482 	crtc_offset_cntl |= RADEON_CRTC_GUI_TRIG_OFFSET_LEFT_EN;
483 	if (tiling_flags & RADEON_TILING_MACRO) {
484 		if (ASIC_IS_R300(rdev))
485 			crtc_offset_cntl |= (R300_CRTC_X_Y_MODE_EN |
486 					     R300_CRTC_MICRO_TILE_BUFFER_DIS |
487 					     R300_CRTC_MACRO_TILE_EN);
488 		else
489 			crtc_offset_cntl |= RADEON_CRTC_TILE_EN;
490 	} else {
491 		if (ASIC_IS_R300(rdev))
492 			crtc_offset_cntl &= ~(R300_CRTC_X_Y_MODE_EN |
493 					      R300_CRTC_MICRO_TILE_BUFFER_DIS |
494 					      R300_CRTC_MACRO_TILE_EN);
495 		else
496 			crtc_offset_cntl &= ~RADEON_CRTC_TILE_EN;
497 	}
498 
499 	if (tiling_flags & RADEON_TILING_MACRO) {
500 		if (ASIC_IS_R300(rdev)) {
501 			crtc_tile_x0_y0 = x | (y << 16);
502 			base &= ~0x7ff;
503 		} else {
504 			int byteshift = target_fb->format->cpp[0] * 8 >> 4;
505 			int tile_addr = (((y >> 3) * pitch_pixels +  x) >> (8 - byteshift)) << 11;
506 			base += tile_addr + ((x << byteshift) % 256) + ((y % 8) << 8);
507 			crtc_offset_cntl |= (y % 16);
508 		}
509 	} else {
510 		int offset = y * pitch_pixels + x;
511 		switch (target_fb->format->cpp[0] * 8) {
512 		case 8:
513 			offset *= 1;
514 			break;
515 		case 15:
516 		case 16:
517 			offset *= 2;
518 			break;
519 		case 24:
520 			offset *= 3;
521 			break;
522 		case 32:
523 			offset *= 4;
524 			break;
525 		default:
526 			return false;
527 		}
528 		base += offset;
529 	}
530 
531 	base &= ~7;
532 
533 	if (radeon_crtc->crtc_id == 1)
534 		gen_cntl_reg = RADEON_CRTC2_GEN_CNTL;
535 	else
536 		gen_cntl_reg = RADEON_CRTC_GEN_CNTL;
537 
538 	gen_cntl_val = RREG32(gen_cntl_reg);
539 	gen_cntl_val &= ~(0xf << 8);
540 	gen_cntl_val |= (format << 8);
541 	gen_cntl_val &= ~RADEON_CRTC_VSTAT_MODE_MASK;
542 	WREG32(gen_cntl_reg, gen_cntl_val);
543 
544 	crtc_offset = (u32)base;
545 
546 	WREG32(RADEON_DISPLAY_BASE_ADDR + radeon_crtc->crtc_offset, radeon_crtc->legacy_display_base_addr);
547 
548 	if (ASIC_IS_R300(rdev)) {
549 		if (radeon_crtc->crtc_id)
550 			WREG32(R300_CRTC2_TILE_X0_Y0, crtc_tile_x0_y0);
551 		else
552 			WREG32(R300_CRTC_TILE_X0_Y0, crtc_tile_x0_y0);
553 	}
554 	WREG32(RADEON_CRTC_OFFSET_CNTL + radeon_crtc->crtc_offset, crtc_offset_cntl);
555 	WREG32(RADEON_CRTC_OFFSET + radeon_crtc->crtc_offset, crtc_offset);
556 	WREG32(RADEON_CRTC_PITCH + radeon_crtc->crtc_offset, crtc_pitch);
557 
558 	if (!atomic && fb && fb != crtc->primary->fb) {
559 		rbo = gem_to_radeon_bo(fb->obj[0]);
560 		r = radeon_bo_reserve(rbo, false);
561 		if (unlikely(r != 0))
562 			return r;
563 		radeon_bo_unpin(rbo);
564 		radeon_bo_unreserve(rbo);
565 	}
566 
567 	/* Bytes per pixel may have changed */
568 	radeon_bandwidth_update(rdev);
569 
570 	return 0;
571 }
572 
573 static bool radeon_set_crtc_timing(struct drm_crtc *crtc, struct drm_display_mode *mode)
574 {
575 	struct drm_device *dev = crtc->dev;
576 	struct radeon_device *rdev = dev->dev_private;
577 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
578 	const struct drm_framebuffer *fb = crtc->primary->fb;
579 	struct drm_encoder *encoder;
580 	int format;
581 	int hsync_start;
582 	int hsync_wid;
583 	int vsync_wid;
584 	uint32_t crtc_h_total_disp;
585 	uint32_t crtc_h_sync_strt_wid;
586 	uint32_t crtc_v_total_disp;
587 	uint32_t crtc_v_sync_strt_wid;
588 	bool is_tv = false;
589 
590 	DRM_DEBUG_KMS("\n");
591 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
592 		if (encoder->crtc == crtc) {
593 			struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
594 			if (radeon_encoder->active_device & ATOM_DEVICE_TV_SUPPORT) {
595 				is_tv = true;
596 				DRM_INFO("crtc %d is connected to a TV\n", radeon_crtc->crtc_id);
597 				break;
598 			}
599 		}
600 	}
601 
602 	switch (fb->format->cpp[0] * 8) {
603 	case 8:
604 		format = 2;
605 		break;
606 	case 15:      /*  555 */
607 		format = 3;
608 		break;
609 	case 16:      /*  565 */
610 		format = 4;
611 		break;
612 	case 24:      /*  RGB */
613 		format = 5;
614 		break;
615 	case 32:      /* xRGB */
616 		format = 6;
617 		break;
618 	default:
619 		return false;
620 	}
621 
622 	crtc_h_total_disp = ((((mode->crtc_htotal / 8) - 1) & 0x3ff)
623 			     | ((((mode->crtc_hdisplay / 8) - 1) & 0x1ff) << 16));
624 
625 	hsync_wid = (mode->crtc_hsync_end - mode->crtc_hsync_start) / 8;
626 	if (!hsync_wid)
627 		hsync_wid = 1;
628 	hsync_start = mode->crtc_hsync_start - 8;
629 
630 	crtc_h_sync_strt_wid = ((hsync_start & 0x1fff)
631 				| ((hsync_wid & 0x3f) << 16)
632 				| ((mode->flags & DRM_MODE_FLAG_NHSYNC)
633 				   ? RADEON_CRTC_H_SYNC_POL
634 				   : 0));
635 
636 	/* This works for double scan mode. */
637 	crtc_v_total_disp = (((mode->crtc_vtotal - 1) & 0xffff)
638 			     | ((mode->crtc_vdisplay - 1) << 16));
639 
640 	vsync_wid = mode->crtc_vsync_end - mode->crtc_vsync_start;
641 	if (!vsync_wid)
642 		vsync_wid = 1;
643 
644 	crtc_v_sync_strt_wid = (((mode->crtc_vsync_start - 1) & 0xfff)
645 				| ((vsync_wid & 0x1f) << 16)
646 				| ((mode->flags & DRM_MODE_FLAG_NVSYNC)
647 				   ? RADEON_CRTC_V_SYNC_POL
648 				   : 0));
649 
650 	if (radeon_crtc->crtc_id) {
651 		uint32_t crtc2_gen_cntl;
652 		uint32_t disp2_merge_cntl;
653 
654 		/* if TV DAC is enabled for another crtc and keep it enabled */
655 		crtc2_gen_cntl = RREG32(RADEON_CRTC2_GEN_CNTL) & 0x00718080;
656 		crtc2_gen_cntl |= ((format << 8)
657 				   | RADEON_CRTC2_VSYNC_DIS
658 				   | RADEON_CRTC2_HSYNC_DIS
659 				   | RADEON_CRTC2_DISP_DIS
660 				   | RADEON_CRTC2_DISP_REQ_EN_B
661 				   | ((mode->flags & DRM_MODE_FLAG_DBLSCAN)
662 				      ? RADEON_CRTC2_DBL_SCAN_EN
663 				      : 0)
664 				   | ((mode->flags & DRM_MODE_FLAG_CSYNC)
665 				      ? RADEON_CRTC2_CSYNC_EN
666 				      : 0)
667 				   | ((mode->flags & DRM_MODE_FLAG_INTERLACE)
668 				      ? RADEON_CRTC2_INTERLACE_EN
669 				      : 0));
670 
671 		/* rs4xx chips seem to like to have the crtc enabled when the timing is set */
672 		if ((rdev->family == CHIP_RS400) || (rdev->family == CHIP_RS480))
673 			crtc2_gen_cntl |= RADEON_CRTC2_EN;
674 
675 		disp2_merge_cntl = RREG32(RADEON_DISP2_MERGE_CNTL);
676 		disp2_merge_cntl &= ~RADEON_DISP2_RGB_OFFSET_EN;
677 
678 		WREG32(RADEON_DISP2_MERGE_CNTL, disp2_merge_cntl);
679 		WREG32(RADEON_CRTC2_GEN_CNTL, crtc2_gen_cntl);
680 
681 		WREG32(RADEON_FP_H2_SYNC_STRT_WID, crtc_h_sync_strt_wid);
682 		WREG32(RADEON_FP_V2_SYNC_STRT_WID, crtc_v_sync_strt_wid);
683 	} else {
684 		uint32_t crtc_gen_cntl;
685 		uint32_t crtc_ext_cntl;
686 		uint32_t disp_merge_cntl;
687 
688 		crtc_gen_cntl = RREG32(RADEON_CRTC_GEN_CNTL) & 0x00718000;
689 		crtc_gen_cntl |= (RADEON_CRTC_EXT_DISP_EN
690 				 | (format << 8)
691 				 | RADEON_CRTC_DISP_REQ_EN_B
692 				 | ((mode->flags & DRM_MODE_FLAG_DBLSCAN)
693 				    ? RADEON_CRTC_DBL_SCAN_EN
694 				    : 0)
695 				 | ((mode->flags & DRM_MODE_FLAG_CSYNC)
696 				    ? RADEON_CRTC_CSYNC_EN
697 				    : 0)
698 				 | ((mode->flags & DRM_MODE_FLAG_INTERLACE)
699 				    ? RADEON_CRTC_INTERLACE_EN
700 				    : 0));
701 
702 		/* rs4xx chips seem to like to have the crtc enabled when the timing is set */
703 		if ((rdev->family == CHIP_RS400) || (rdev->family == CHIP_RS480))
704 			crtc_gen_cntl |= RADEON_CRTC_EN;
705 
706 		crtc_ext_cntl = RREG32(RADEON_CRTC_EXT_CNTL);
707 		crtc_ext_cntl |= (RADEON_XCRT_CNT_EN |
708 				  RADEON_CRTC_VSYNC_DIS |
709 				  RADEON_CRTC_HSYNC_DIS |
710 				  RADEON_CRTC_DISPLAY_DIS);
711 
712 		disp_merge_cntl = RREG32(RADEON_DISP_MERGE_CNTL);
713 		disp_merge_cntl &= ~RADEON_DISP_RGB_OFFSET_EN;
714 
715 		WREG32(RADEON_DISP_MERGE_CNTL, disp_merge_cntl);
716 		WREG32(RADEON_CRTC_GEN_CNTL, crtc_gen_cntl);
717 		WREG32(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl);
718 	}
719 
720 	if (is_tv)
721 		radeon_legacy_tv_adjust_crtc_reg(encoder, &crtc_h_total_disp,
722 						 &crtc_h_sync_strt_wid, &crtc_v_total_disp,
723 						 &crtc_v_sync_strt_wid);
724 
725 	WREG32(RADEON_CRTC_H_TOTAL_DISP + radeon_crtc->crtc_offset, crtc_h_total_disp);
726 	WREG32(RADEON_CRTC_H_SYNC_STRT_WID + radeon_crtc->crtc_offset, crtc_h_sync_strt_wid);
727 	WREG32(RADEON_CRTC_V_TOTAL_DISP + radeon_crtc->crtc_offset, crtc_v_total_disp);
728 	WREG32(RADEON_CRTC_V_SYNC_STRT_WID + radeon_crtc->crtc_offset, crtc_v_sync_strt_wid);
729 
730 	return true;
731 }
732 
733 static void radeon_set_pll(struct drm_crtc *crtc, struct drm_display_mode *mode)
734 {
735 	struct drm_device *dev = crtc->dev;
736 	struct radeon_device *rdev = dev->dev_private;
737 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
738 	struct drm_encoder *encoder;
739 	uint32_t feedback_div = 0;
740 	uint32_t frac_fb_div = 0;
741 	uint32_t reference_div = 0;
742 	uint32_t post_divider = 0;
743 	uint32_t freq = 0;
744 	uint8_t pll_gain;
745 	bool use_bios_divs = false;
746 	/* PLL registers */
747 	uint32_t pll_ref_div = 0;
748 	uint32_t pll_fb_post_div = 0;
749 	uint32_t htotal_cntl = 0;
750 	bool is_tv = false;
751 	struct radeon_pll *pll;
752 
753 	struct {
754 		int divider;
755 		int bitvalue;
756 	} *post_div, post_divs[]   = {
757 		/* From RAGE 128 VR/RAGE 128 GL Register
758 		 * Reference Manual (Technical Reference
759 		 * Manual P/N RRG-G04100-C Rev. 0.04), page
760 		 * 3-17 (PLL_DIV_[3:0]).
761 		 */
762 		{  1, 0 },              /* VCLK_SRC                 */
763 		{  2, 1 },              /* VCLK_SRC/2               */
764 		{  4, 2 },              /* VCLK_SRC/4               */
765 		{  8, 3 },              /* VCLK_SRC/8               */
766 		{  3, 4 },              /* VCLK_SRC/3               */
767 		{ 16, 5 },              /* VCLK_SRC/16              */
768 		{  6, 6 },              /* VCLK_SRC/6               */
769 		{ 12, 7 },              /* VCLK_SRC/12              */
770 		{  0, 0 }
771 	};
772 
773 	if (radeon_crtc->crtc_id)
774 		pll = &rdev->clock.p2pll;
775 	else
776 		pll = &rdev->clock.p1pll;
777 
778 	pll->flags = RADEON_PLL_LEGACY;
779 
780 	if (mode->clock > 200000) /* range limits??? */
781 		pll->flags |= RADEON_PLL_PREFER_HIGH_FB_DIV;
782 	else
783 		pll->flags |= RADEON_PLL_PREFER_LOW_REF_DIV;
784 
785 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
786 		if (encoder->crtc == crtc) {
787 			struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
788 
789 			if (radeon_encoder->active_device & ATOM_DEVICE_TV_SUPPORT) {
790 				is_tv = true;
791 				break;
792 			}
793 
794 			if (encoder->encoder_type != DRM_MODE_ENCODER_DAC)
795 				pll->flags |= RADEON_PLL_NO_ODD_POST_DIV;
796 			if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS) {
797 				if (!rdev->is_atom_bios) {
798 					struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
799 					struct radeon_encoder_lvds *lvds = (struct radeon_encoder_lvds *)radeon_encoder->enc_priv;
800 					if (lvds) {
801 						if (lvds->use_bios_dividers) {
802 							pll_ref_div = lvds->panel_ref_divider;
803 							pll_fb_post_div   = (lvds->panel_fb_divider |
804 									     (lvds->panel_post_divider << 16));
805 							htotal_cntl  = 0;
806 							use_bios_divs = true;
807 						}
808 					}
809 				}
810 				pll->flags |= RADEON_PLL_USE_REF_DIV;
811 			}
812 		}
813 	}
814 
815 	DRM_DEBUG_KMS("\n");
816 
817 	if (!use_bios_divs) {
818 		radeon_compute_pll_legacy(pll, mode->clock,
819 					  &freq, &feedback_div, &frac_fb_div,
820 					  &reference_div, &post_divider);
821 
822 		for (post_div = &post_divs[0]; post_div->divider; ++post_div) {
823 			if (post_div->divider == post_divider)
824 				break;
825 		}
826 
827 		if (!post_div->divider)
828 			post_div = &post_divs[0];
829 
830 		DRM_DEBUG_KMS("dc=%u, fd=%d, rd=%d, pd=%d\n",
831 			  (unsigned)freq,
832 			  feedback_div,
833 			  reference_div,
834 			  post_divider);
835 
836 		pll_ref_div   = reference_div;
837 #if defined(__powerpc__) && (0) /* TODO */
838 		/* apparently programming this otherwise causes a hang??? */
839 		if (info->MacModel == RADEON_MAC_IBOOK)
840 			pll_fb_post_div = 0x000600ad;
841 		else
842 #endif
843 			pll_fb_post_div     = (feedback_div | (post_div->bitvalue << 16));
844 
845 		htotal_cntl    = mode->htotal & 0x7;
846 
847 	}
848 
849 	pll_gain = radeon_compute_pll_gain(pll->reference_freq,
850 					   pll_ref_div & 0x3ff,
851 					   pll_fb_post_div & 0x7ff);
852 
853 	if (radeon_crtc->crtc_id) {
854 		uint32_t pixclks_cntl = ((RREG32_PLL(RADEON_PIXCLKS_CNTL) &
855 					  ~(RADEON_PIX2CLK_SRC_SEL_MASK)) |
856 					 RADEON_PIX2CLK_SRC_SEL_P2PLLCLK);
857 
858 		if (is_tv) {
859 			radeon_legacy_tv_adjust_pll2(encoder, &htotal_cntl,
860 						     &pll_ref_div, &pll_fb_post_div,
861 						     &pixclks_cntl);
862 		}
863 
864 		WREG32_PLL_P(RADEON_PIXCLKS_CNTL,
865 			     RADEON_PIX2CLK_SRC_SEL_CPUCLK,
866 			     ~(RADEON_PIX2CLK_SRC_SEL_MASK));
867 
868 		WREG32_PLL_P(RADEON_P2PLL_CNTL,
869 			     RADEON_P2PLL_RESET
870 			     | RADEON_P2PLL_ATOMIC_UPDATE_EN
871 			     | ((uint32_t)pll_gain << RADEON_P2PLL_PVG_SHIFT),
872 			     ~(RADEON_P2PLL_RESET
873 			       | RADEON_P2PLL_ATOMIC_UPDATE_EN
874 			       | RADEON_P2PLL_PVG_MASK));
875 
876 		WREG32_PLL_P(RADEON_P2PLL_REF_DIV,
877 			     pll_ref_div,
878 			     ~RADEON_P2PLL_REF_DIV_MASK);
879 
880 		WREG32_PLL_P(RADEON_P2PLL_DIV_0,
881 			     pll_fb_post_div,
882 			     ~RADEON_P2PLL_FB0_DIV_MASK);
883 
884 		WREG32_PLL_P(RADEON_P2PLL_DIV_0,
885 			     pll_fb_post_div,
886 			     ~RADEON_P2PLL_POST0_DIV_MASK);
887 
888 		radeon_pll2_write_update(dev);
889 		radeon_pll2_wait_for_read_update_complete(dev);
890 
891 		WREG32_PLL(RADEON_HTOTAL2_CNTL, htotal_cntl);
892 
893 		WREG32_PLL_P(RADEON_P2PLL_CNTL,
894 			     0,
895 			     ~(RADEON_P2PLL_RESET
896 			       | RADEON_P2PLL_SLEEP
897 			       | RADEON_P2PLL_ATOMIC_UPDATE_EN));
898 
899 		DRM_DEBUG_KMS("Wrote2: 0x%08x 0x%08x 0x%08x (0x%08x)\n",
900 			  (unsigned)pll_ref_div,
901 			  (unsigned)pll_fb_post_div,
902 			  (unsigned)htotal_cntl,
903 			  RREG32_PLL(RADEON_P2PLL_CNTL));
904 		DRM_DEBUG_KMS("Wrote2: rd=%u, fd=%u, pd=%u\n",
905 			  (unsigned)pll_ref_div & RADEON_P2PLL_REF_DIV_MASK,
906 			  (unsigned)pll_fb_post_div & RADEON_P2PLL_FB0_DIV_MASK,
907 			  (unsigned)((pll_fb_post_div &
908 				      RADEON_P2PLL_POST0_DIV_MASK) >> 16));
909 
910 		mdelay(50); /* Let the clock to lock */
911 
912 		WREG32_PLL_P(RADEON_PIXCLKS_CNTL,
913 			     RADEON_PIX2CLK_SRC_SEL_P2PLLCLK,
914 			     ~(RADEON_PIX2CLK_SRC_SEL_MASK));
915 
916 		WREG32_PLL(RADEON_PIXCLKS_CNTL, pixclks_cntl);
917 	} else {
918 		uint32_t pixclks_cntl;
919 
920 
921 		if (is_tv) {
922 			pixclks_cntl = RREG32_PLL(RADEON_PIXCLKS_CNTL);
923 			radeon_legacy_tv_adjust_pll1(encoder, &htotal_cntl, &pll_ref_div,
924 						     &pll_fb_post_div, &pixclks_cntl);
925 		}
926 
927 		if (rdev->flags & RADEON_IS_MOBILITY) {
928 			/* A temporal workaround for the occasional blanking on certain laptop panels.
929 			   This appears to related to the PLL divider registers (fail to lock?).
930 			   It occurs even when all dividers are the same with their old settings.
931 			   In this case we really don't need to fiddle with PLL registers.
932 			   By doing this we can avoid the blanking problem with some panels.
933 			*/
934 			if ((pll_ref_div == (RREG32_PLL(RADEON_PPLL_REF_DIV) & RADEON_PPLL_REF_DIV_MASK)) &&
935 			    (pll_fb_post_div == (RREG32_PLL(RADEON_PPLL_DIV_3) &
936 						 (RADEON_PPLL_POST3_DIV_MASK | RADEON_PPLL_FB3_DIV_MASK)))) {
937 				WREG32_P(RADEON_CLOCK_CNTL_INDEX,
938 					 RADEON_PLL_DIV_SEL,
939 					 ~(RADEON_PLL_DIV_SEL));
940 				r100_pll_errata_after_index(rdev);
941 				return;
942 			}
943 		}
944 
945 		WREG32_PLL_P(RADEON_VCLK_ECP_CNTL,
946 			     RADEON_VCLK_SRC_SEL_CPUCLK,
947 			     ~(RADEON_VCLK_SRC_SEL_MASK));
948 		WREG32_PLL_P(RADEON_PPLL_CNTL,
949 			     RADEON_PPLL_RESET
950 			     | RADEON_PPLL_ATOMIC_UPDATE_EN
951 			     | RADEON_PPLL_VGA_ATOMIC_UPDATE_EN
952 			     | ((uint32_t)pll_gain << RADEON_PPLL_PVG_SHIFT),
953 			     ~(RADEON_PPLL_RESET
954 			       | RADEON_PPLL_ATOMIC_UPDATE_EN
955 			       | RADEON_PPLL_VGA_ATOMIC_UPDATE_EN
956 			       | RADEON_PPLL_PVG_MASK));
957 
958 		WREG32_P(RADEON_CLOCK_CNTL_INDEX,
959 			 RADEON_PLL_DIV_SEL,
960 			 ~(RADEON_PLL_DIV_SEL));
961 		r100_pll_errata_after_index(rdev);
962 
963 		if (ASIC_IS_R300(rdev) ||
964 		    (rdev->family == CHIP_RS300) ||
965 		    (rdev->family == CHIP_RS400) ||
966 		    (rdev->family == CHIP_RS480)) {
967 			if (pll_ref_div & R300_PPLL_REF_DIV_ACC_MASK) {
968 				/* When restoring console mode, use saved PPLL_REF_DIV
969 				 * setting.
970 				 */
971 				WREG32_PLL_P(RADEON_PPLL_REF_DIV,
972 					     pll_ref_div,
973 					     0);
974 			} else {
975 				/* R300 uses ref_div_acc field as real ref divider */
976 				WREG32_PLL_P(RADEON_PPLL_REF_DIV,
977 					     (pll_ref_div << R300_PPLL_REF_DIV_ACC_SHIFT),
978 					     ~R300_PPLL_REF_DIV_ACC_MASK);
979 			}
980 		} else
981 			WREG32_PLL_P(RADEON_PPLL_REF_DIV,
982 				     pll_ref_div,
983 				     ~RADEON_PPLL_REF_DIV_MASK);
984 
985 		WREG32_PLL_P(RADEON_PPLL_DIV_3,
986 			     pll_fb_post_div,
987 			     ~RADEON_PPLL_FB3_DIV_MASK);
988 
989 		WREG32_PLL_P(RADEON_PPLL_DIV_3,
990 			     pll_fb_post_div,
991 			     ~RADEON_PPLL_POST3_DIV_MASK);
992 
993 		radeon_pll_write_update(dev);
994 		radeon_pll_wait_for_read_update_complete(dev);
995 
996 		WREG32_PLL(RADEON_HTOTAL_CNTL, htotal_cntl);
997 
998 		WREG32_PLL_P(RADEON_PPLL_CNTL,
999 			     0,
1000 			     ~(RADEON_PPLL_RESET
1001 			       | RADEON_PPLL_SLEEP
1002 			       | RADEON_PPLL_ATOMIC_UPDATE_EN
1003 			       | RADEON_PPLL_VGA_ATOMIC_UPDATE_EN));
1004 
1005 		DRM_DEBUG_KMS("Wrote: 0x%08x 0x%08x 0x%08x (0x%08x)\n",
1006 			  pll_ref_div,
1007 			  pll_fb_post_div,
1008 			  (unsigned)htotal_cntl,
1009 			  RREG32_PLL(RADEON_PPLL_CNTL));
1010 		DRM_DEBUG_KMS("Wrote: rd=%d, fd=%d, pd=%d\n",
1011 			  pll_ref_div & RADEON_PPLL_REF_DIV_MASK,
1012 			  pll_fb_post_div & RADEON_PPLL_FB3_DIV_MASK,
1013 			  (pll_fb_post_div & RADEON_PPLL_POST3_DIV_MASK) >> 16);
1014 
1015 		mdelay(50); /* Let the clock to lock */
1016 
1017 		WREG32_PLL_P(RADEON_VCLK_ECP_CNTL,
1018 			     RADEON_VCLK_SRC_SEL_PPLLCLK,
1019 			     ~(RADEON_VCLK_SRC_SEL_MASK));
1020 
1021 		if (is_tv)
1022 			WREG32_PLL(RADEON_PIXCLKS_CNTL, pixclks_cntl);
1023 	}
1024 }
1025 
1026 static bool radeon_crtc_mode_fixup(struct drm_crtc *crtc,
1027 				   const struct drm_display_mode *mode,
1028 				   struct drm_display_mode *adjusted_mode)
1029 {
1030 	if (!radeon_crtc_scaling_mode_fixup(crtc, mode, adjusted_mode))
1031 		return false;
1032 	return true;
1033 }
1034 
1035 static int radeon_crtc_mode_set(struct drm_crtc *crtc,
1036 				 struct drm_display_mode *mode,
1037 				 struct drm_display_mode *adjusted_mode,
1038 				 int x, int y, struct drm_framebuffer *old_fb)
1039 {
1040 	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
1041 
1042 	/* TODO TV */
1043 	radeon_crtc_set_base(crtc, x, y, old_fb);
1044 	radeon_set_crtc_timing(crtc, adjusted_mode);
1045 	radeon_set_pll(crtc, adjusted_mode);
1046 	radeon_overscan_setup(crtc, adjusted_mode);
1047 	if (radeon_crtc->crtc_id == 0) {
1048 		radeon_legacy_rmx_mode_set(crtc, adjusted_mode);
1049 	} else {
1050 		if (radeon_crtc->rmx_type != RMX_OFF) {
1051 			/* FIXME: only first crtc has rmx what should we
1052 			 * do ?
1053 			 */
1054 			DRM_ERROR("Mode need scaling but only first crtc can do that.\n");
1055 		}
1056 	}
1057 	radeon_cursor_reset(crtc);
1058 	return 0;
1059 }
1060 
1061 static void radeon_crtc_prepare(struct drm_crtc *crtc)
1062 {
1063 	struct drm_device *dev = crtc->dev;
1064 	struct drm_crtc *crtci;
1065 
1066 	/*
1067 	* The hardware wedges sometimes if you reconfigure one CRTC
1068 	* whilst another is running (see fdo bug #24611).
1069 	*/
1070 	list_for_each_entry(crtci, &dev->mode_config.crtc_list, head)
1071 		radeon_crtc_dpms(crtci, DRM_MODE_DPMS_OFF);
1072 }
1073 
1074 static void radeon_crtc_commit(struct drm_crtc *crtc)
1075 {
1076 	struct drm_device *dev = crtc->dev;
1077 	struct drm_crtc *crtci;
1078 
1079 	/*
1080 	* Reenable the CRTCs that should be running.
1081 	*/
1082 	list_for_each_entry(crtci, &dev->mode_config.crtc_list, head) {
1083 		if (crtci->enabled)
1084 			radeon_crtc_dpms(crtci, DRM_MODE_DPMS_ON);
1085 	}
1086 }
1087 
1088 static void radeon_crtc_disable(struct drm_crtc *crtc)
1089 {
1090 	radeon_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
1091 	if (crtc->primary->fb) {
1092 		int r;
1093 		struct radeon_bo *rbo;
1094 
1095 		rbo = gem_to_radeon_bo(crtc->primary->fb->obj[0]);
1096 		r = radeon_bo_reserve(rbo, false);
1097 		if (unlikely(r))
1098 			DRM_ERROR("failed to reserve rbo before unpin\n");
1099 		else {
1100 			radeon_bo_unpin(rbo);
1101 			radeon_bo_unreserve(rbo);
1102 		}
1103 	}
1104 }
1105 
1106 static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
1107 	.dpms = radeon_crtc_dpms,
1108 	.mode_fixup = radeon_crtc_mode_fixup,
1109 	.mode_set = radeon_crtc_mode_set,
1110 	.mode_set_base = radeon_crtc_set_base,
1111 	.mode_set_base_atomic = radeon_crtc_set_base_atomic,
1112 	.prepare = radeon_crtc_prepare,
1113 	.commit = radeon_crtc_commit,
1114 	.disable = radeon_crtc_disable
1115 };
1116 
1117 
1118 void radeon_legacy_init_crtc(struct drm_device *dev,
1119 			       struct radeon_crtc *radeon_crtc)
1120 {
1121 	if (radeon_crtc->crtc_id == 1)
1122 		radeon_crtc->crtc_offset = RADEON_CRTC2_H_TOTAL_DISP - RADEON_CRTC_H_TOTAL_DISP;
1123 	drm_crtc_helper_add(&radeon_crtc->base, &legacy_helper_funcs);
1124 }
1125