1 /*
2  * Copyright 2009 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Author: Ben Skeggs
23  */
24 
25 #include <drm/drm_crtc_helper.h>
26 
27 #include "nouveau_drv.h"
28 #include "nouveau_reg.h"
29 #include "hw.h"
30 #include "nouveau_encoder.h"
31 #include "nouveau_connector.h"
32 #include "nouveau_bo.h"
33 #include "nouveau_gem.h"
34 #include "nouveau_chan.h"
35 
36 #include <nvif/if0004.h>
37 
38 struct nouveau_connector *
39 nv04_encoder_get_connector(struct nouveau_encoder *encoder)
40 {
41 	struct drm_device *dev = to_drm_encoder(encoder)->dev;
42 	struct drm_connector *connector;
43 	struct drm_connector_list_iter conn_iter;
44 	struct nouveau_connector *nv_connector = NULL;
45 
46 	drm_connector_list_iter_begin(dev, &conn_iter);
47 	drm_for_each_connector_iter(connector, &conn_iter) {
48 		if (connector->encoder == to_drm_encoder(encoder))
49 			nv_connector = nouveau_connector(connector);
50 	}
51 	drm_connector_list_iter_end(&conn_iter);
52 
53 	return nv_connector;
54 }
55 
56 static void
57 nv04_display_fini(struct drm_device *dev, bool runtime, bool suspend)
58 {
59 	struct nouveau_drm *drm = nouveau_drm(dev);
60 	struct nv04_display *disp = nv04_display(dev);
61 	struct drm_crtc *crtc;
62 
63 	/* Disable flip completion events. */
64 	nvif_event_block(&disp->flip);
65 
66 	/* Disable vblank interrupts. */
67 	NVWriteCRTC(dev, 0, NV_PCRTC_INTR_EN_0, 0);
68 	if (nv_two_heads(dev))
69 		NVWriteCRTC(dev, 1, NV_PCRTC_INTR_EN_0, 0);
70 
71 	if (!runtime)
72 		cancel_work_sync(&drm->hpd_work);
73 
74 	if (!suspend)
75 		return;
76 
77 	/* Un-pin FB and cursors so they'll be evicted to system memory. */
78 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
79 		struct drm_framebuffer *fb = crtc->primary->fb;
80 		struct nouveau_bo *nvbo;
81 
82 		if (!fb || !fb->obj[0])
83 			continue;
84 		nvbo = nouveau_gem_object(fb->obj[0]);
85 		nouveau_bo_unpin(nvbo);
86 	}
87 
88 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
89 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
90 		if (nv_crtc->cursor.nvbo) {
91 			if (nv_crtc->cursor.set_offset)
92 				nouveau_bo_unmap(nv_crtc->cursor.nvbo);
93 			nouveau_bo_unpin(nv_crtc->cursor.nvbo);
94 		}
95 	}
96 }
97 
98 static int
99 nv04_display_init(struct drm_device *dev, bool resume, bool runtime)
100 {
101 	struct nv04_display *disp = nv04_display(dev);
102 	struct nouveau_drm *drm = nouveau_drm(dev);
103 	struct nouveau_encoder *encoder;
104 	struct drm_crtc *crtc;
105 	int ret;
106 
107 	/* meh.. modeset apparently doesn't setup all the regs and depends
108 	 * on pre-existing state, for now load the state of the card *before*
109 	 * nouveau was loaded, and then do a modeset.
110 	 *
111 	 * best thing to do probably is to make save/restore routines not
112 	 * save/restore "pre-load" state, but more general so we can save
113 	 * on suspend too.
114 	 */
115 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
116 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
117 		nv_crtc->save(&nv_crtc->base);
118 	}
119 
120 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.base.head)
121 		encoder->enc_save(&encoder->base.base);
122 
123 	/* Enable flip completion events. */
124 	nvif_event_allow(&disp->flip);
125 
126 	if (!resume)
127 		return 0;
128 
129 	/* Re-pin FB/cursors. */
130 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
131 		struct drm_framebuffer *fb = crtc->primary->fb;
132 		struct nouveau_bo *nvbo;
133 
134 		if (!fb || !fb->obj[0])
135 			continue;
136 		nvbo = nouveau_gem_object(fb->obj[0]);
137 		ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_VRAM, true);
138 		if (ret)
139 			NV_ERROR(drm, "Could not pin framebuffer\n");
140 	}
141 
142 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
143 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
144 		if (!nv_crtc->cursor.nvbo)
145 			continue;
146 
147 		ret = nouveau_bo_pin(nv_crtc->cursor.nvbo,
148 				     NOUVEAU_GEM_DOMAIN_VRAM, true);
149 		if (!ret && nv_crtc->cursor.set_offset)
150 			ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
151 		if (ret)
152 			NV_ERROR(drm, "Could not pin/map cursor.\n");
153 	}
154 
155 	/* Force CLUT to get re-loaded during modeset. */
156 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
157 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
158 
159 		nv_crtc->lut.depth = 0;
160 	}
161 
162 	/* This should ensure we don't hit a locking problem when someone
163 	 * wakes us up via a connector.  We should never go into suspend
164 	 * while the display is on anyways.
165 	 */
166 	if (runtime)
167 		return 0;
168 
169 	/* Restore mode. */
170 	drm_helper_resume_force_mode(dev);
171 
172 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
173 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
174 
175 		if (!nv_crtc->cursor.nvbo)
176 			continue;
177 
178 		if (nv_crtc->cursor.set_offset)
179 			nv_crtc->cursor.set_offset(nv_crtc,
180 						   nv_crtc->cursor.nvbo->offset);
181 		nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
182 						 nv_crtc->cursor_saved_y);
183 	}
184 
185 	return 0;
186 }
187 
188 static void
189 nv04_display_destroy(struct drm_device *dev)
190 {
191 	struct nv04_display *disp = nv04_display(dev);
192 	struct nouveau_drm *drm = nouveau_drm(dev);
193 	struct nouveau_encoder *encoder;
194 	struct nouveau_crtc *nv_crtc;
195 
196 	/* Restore state */
197 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.base.head)
198 		encoder->enc_restore(&encoder->base.base);
199 
200 	list_for_each_entry(nv_crtc, &dev->mode_config.crtc_list, base.head)
201 		nv_crtc->restore(&nv_crtc->base);
202 
203 	nouveau_hw_save_vga_fonts(dev, 0);
204 
205 	nvif_event_dtor(&disp->flip);
206 
207 	nouveau_display(dev)->priv = NULL;
208 	vfree(disp);
209 
210 	nvif_object_unmap(&drm->client.device.object);
211 }
212 
213 int
214 nv04_display_create(struct drm_device *dev)
215 {
216 	struct nouveau_drm *drm = nouveau_drm(dev);
217 	struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
218 	struct dcb_table *dcb = &drm->vbios.dcb;
219 	struct drm_connector *connector, *ct;
220 	struct drm_encoder *encoder;
221 	struct nouveau_encoder *nv_encoder;
222 	struct nouveau_crtc *crtc;
223 	struct nv04_display *disp;
224 	int i, ret;
225 
226 	disp = vzalloc(sizeof(*disp));
227 	if (!disp)
228 		return -ENOMEM;
229 
230 	disp->drm = drm;
231 
232 	nvif_object_map(&drm->client.device.object, NULL, 0);
233 
234 	nouveau_display(dev)->priv = disp;
235 	nouveau_display(dev)->dtor = nv04_display_destroy;
236 	nouveau_display(dev)->init = nv04_display_init;
237 	nouveau_display(dev)->fini = nv04_display_fini;
238 
239 	/* Pre-nv50 doesn't support atomic, so don't expose the ioctls */
240 	dev->driver_features &= ~DRIVER_ATOMIC;
241 
242 	/* Request page flip completion event. */
243 	if (drm->channel) {
244 		ret = nvif_event_ctor(&drm->channel->nvsw, "kmsFlip", 0, nv04_flip_complete,
245 				      true, NULL, 0, &disp->flip);
246 		if (ret)
247 			return ret;
248 	}
249 
250 	nouveau_hw_save_vga_fonts(dev, 1);
251 
252 	nv04_crtc_create(dev, 0);
253 	if (nv_two_heads(dev))
254 		nv04_crtc_create(dev, 1);
255 
256 	for (i = 0; i < dcb->entries; i++) {
257 		struct dcb_output *dcbent = &dcb->entry[i];
258 
259 		connector = nouveau_connector_create(dev, dcbent);
260 		if (IS_ERR(connector))
261 			continue;
262 
263 		switch (dcbent->type) {
264 		case DCB_OUTPUT_ANALOG:
265 			ret = nv04_dac_create(connector, dcbent);
266 			break;
267 		case DCB_OUTPUT_LVDS:
268 		case DCB_OUTPUT_TMDS:
269 			ret = nv04_dfp_create(connector, dcbent);
270 			break;
271 		case DCB_OUTPUT_TV:
272 			if (dcbent->location == DCB_LOC_ON_CHIP)
273 				ret = nv17_tv_create(connector, dcbent);
274 			else
275 				ret = nv04_tv_create(connector, dcbent);
276 			break;
277 		default:
278 			NV_WARN(drm, "DCB type %d not known\n", dcbent->type);
279 			continue;
280 		}
281 
282 		if (ret)
283 			continue;
284 	}
285 
286 	list_for_each_entry_safe(connector, ct,
287 				 &dev->mode_config.connector_list, head) {
288 		if (!connector->possible_encoders) {
289 			NV_WARN(drm, "%s has no encoders, removing\n",
290 				connector->name);
291 			connector->funcs->destroy(connector);
292 		}
293 	}
294 
295 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
296 		struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
297 		struct nvkm_i2c_bus *bus =
298 			nvkm_i2c_bus_find(i2c, nv_encoder->dcb->i2c_index);
299 		nv_encoder->i2c = bus ? &bus->i2c : NULL;
300 	}
301 
302 	/* Save previous state */
303 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head)
304 		crtc->save(&crtc->base);
305 
306 	list_for_each_entry(nv_encoder, &dev->mode_config.encoder_list, base.base.head)
307 		nv_encoder->enc_save(&nv_encoder->base.base);
308 
309 	nouveau_overlay_init(dev);
310 
311 	return 0;
312 }
313