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1 /*
2  * Copyright (C) 2008 Maarten Maathuis.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26
27 #include "drmP.h"
28 #include "drm_crtc_helper.h"
29
30 #define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
31 #include "nouveau_reg.h"
32 #include "nouveau_drv.h"
33 #include "nouveau_dma.h"
34 #include "nouveau_encoder.h"
35 #include "nouveau_connector.h"
36 #include "nouveau_crtc.h"
37 #include "nv50_display.h"
38
39 static void
40 nv50_dac_disconnect(struct drm_encoder *encoder)
41 {
42         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
43         struct drm_device *dev = encoder->dev;
44         struct nouveau_channel *evo = nv50_display(dev)->master;
45         int ret;
46
47         if (!nv_encoder->crtc)
48                 return;
49         nv50_crtc_blank(nouveau_crtc(nv_encoder->crtc), true);
50
51         NV_DEBUG_KMS(dev, "Disconnecting DAC %d\n", nv_encoder->or);
52
53         ret = RING_SPACE(evo, 4);
54         if (ret) {
55                 NV_ERROR(dev, "no space while disconnecting DAC\n");
56                 return;
57         }
58         BEGIN_NV04(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 1);
59         OUT_RING  (evo, 0);
60         BEGIN_NV04(evo, 0, NV50_EVO_UPDATE, 1);
61         OUT_RING  (evo, 0);
62
63         nv_encoder->crtc = NULL;
64 }
65
66 static enum drm_connector_status
67 nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
68 {
69         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
70         struct drm_device *dev = encoder->dev;
71         struct drm_nouveau_private *dev_priv = dev->dev_private;
72         enum drm_connector_status status = connector_status_disconnected;
73         uint32_t dpms_state, load_pattern, load_state;
74         int or = nv_encoder->or;
75
76         nv_wr32(dev, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
77         dpms_state = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or));
78
79         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
80                 0x00150000 | NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
81         if (!nv_wait(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
82                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
83                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
84                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
85                           nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
86                 return status;
87         }
88
89         /* Use bios provided value if possible. */
90         if (dev_priv->vbios.dactestval) {
91                 load_pattern = dev_priv->vbios.dactestval;
92                 NV_DEBUG_KMS(dev, "Using bios provided load_pattern of %d\n",
93                           load_pattern);
94         } else {
95                 load_pattern = 340;
96                 NV_DEBUG_KMS(dev, "Using default load_pattern of %d\n",
97                          load_pattern);
98         }
99
100         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
101                 NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern);
102         mdelay(45); /* give it some time to process */
103         load_state = nv_rd32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or));
104
105         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
106         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state |
107                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
108
109         if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
110                           NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
111                 status = connector_status_connected;
112
113         if (status == connector_status_connected)
114                 NV_DEBUG_KMS(dev, "Load was detected on output with or %d\n", or);
115         else
116                 NV_DEBUG_KMS(dev, "Load was not detected on output with or %d\n", or);
117
118         return status;
119 }
120
121 static void
122 nv50_dac_dpms(struct drm_encoder *encoder, int mode)
123 {
124         struct drm_device *dev = encoder->dev;
125         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
126         uint32_t val;
127         int or = nv_encoder->or;
128
129         NV_DEBUG_KMS(dev, "or %d mode %d\n", or, mode);
130
131         /* wait for it to be done */
132         if (!nv_wait(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
133                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
134                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
135                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
136                          nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
137                 return;
138         }
139
140         val = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)) & ~0x7F;
141
142         if (mode != DRM_MODE_DPMS_ON)
143                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_BLANKED;
144
145         switch (mode) {
146         case DRM_MODE_DPMS_STANDBY:
147                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
148                 break;
149         case DRM_MODE_DPMS_SUSPEND:
150                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
151                 break;
152         case DRM_MODE_DPMS_OFF:
153                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_OFF;
154                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
155                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
156                 break;
157         default:
158                 break;
159         }
160
161         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), val |
162                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
163 }
164
165 static void
166 nv50_dac_save(struct drm_encoder *encoder)
167 {
168         NV_ERROR(encoder->dev, "!!\n");
169 }
170
171 static void
172 nv50_dac_restore(struct drm_encoder *encoder)
173 {
174         NV_ERROR(encoder->dev, "!!\n");
175 }
176
177 static bool
178 nv50_dac_mode_fixup(struct drm_encoder *encoder,
179                     const struct drm_display_mode *mode,
180                     struct drm_display_mode *adjusted_mode)
181 {
182         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
183         struct nouveau_connector *connector;
184
185         NV_DEBUG_KMS(encoder->dev, "or %d\n", nv_encoder->or);
186
187         connector = nouveau_encoder_connector_get(nv_encoder);
188         if (!connector) {
189                 NV_ERROR(encoder->dev, "Encoder has no connector\n");
190                 return false;
191         }
192
193         if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
194              connector->native_mode)
195                 drm_mode_copy(adjusted_mode, connector->native_mode);
196
197         return true;
198 }
199
200 static void
201 nv50_dac_commit(struct drm_encoder *encoder)
202 {
203 }
204
205 static void
206 nv50_dac_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
207                   struct drm_display_mode *adjusted_mode)
208 {
209         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
210         struct drm_device *dev = encoder->dev;
211         struct nouveau_channel *evo = nv50_display(dev)->master;
212         struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
213         uint32_t mode_ctl = 0, mode_ctl2 = 0;
214         int ret;
215
216         NV_DEBUG_KMS(dev, "or %d type %d crtc %d\n",
217                      nv_encoder->or, nv_encoder->dcb->type, crtc->index);
218
219         nv50_dac_dpms(encoder, DRM_MODE_DPMS_ON);
220
221         if (crtc->index == 1)
222                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC1;
223         else
224                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC0;
225
226         /* Lacking a working tv-out, this is not a 100% sure. */
227         if (nv_encoder->dcb->type == DCB_OUTPUT_ANALOG)
228                 mode_ctl |= 0x40;
229         else
230         if (nv_encoder->dcb->type == DCB_OUTPUT_TV)
231                 mode_ctl |= 0x100;
232
233         if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
234                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NHSYNC;
235
236         if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
237                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NVSYNC;
238
239         ret = RING_SPACE(evo, 3);
240         if (ret) {
241                 NV_ERROR(dev, "no space while connecting DAC\n");
242                 return;
243         }
244         BEGIN_NV04(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 2);
245         OUT_RING(evo, mode_ctl);
246         OUT_RING(evo, mode_ctl2);
247
248         nv_encoder->crtc = encoder->crtc;
249 }
250
251 static struct drm_crtc *
252 nv50_dac_crtc_get(struct drm_encoder *encoder)
253 {
254         return nouveau_encoder(encoder)->crtc;
255 }
256
257 static const struct drm_encoder_helper_funcs nv50_dac_helper_funcs = {
258         .dpms = nv50_dac_dpms,
259         .save = nv50_dac_save,
260         .restore = nv50_dac_restore,
261         .mode_fixup = nv50_dac_mode_fixup,
262         .prepare = nv50_dac_disconnect,
263         .commit = nv50_dac_commit,
264         .mode_set = nv50_dac_mode_set,
265         .get_crtc = nv50_dac_crtc_get,
266         .detect = nv50_dac_detect,
267         .disable = nv50_dac_disconnect
268 };
269
270 static void
271 nv50_dac_destroy(struct drm_encoder *encoder)
272 {
273         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
274
275         if (!encoder)
276                 return;
277
278         NV_DEBUG_KMS(encoder->dev, "\n");
279
280         drm_encoder_cleanup(encoder);
281         kfree(nv_encoder);
282 }
283
284 static const struct drm_encoder_funcs nv50_dac_encoder_funcs = {
285         .destroy = nv50_dac_destroy,
286 };
287
288 int
289 nv50_dac_create(struct drm_connector *connector, struct dcb_output *entry)
290 {
291         struct nouveau_encoder *nv_encoder;
292         struct drm_encoder *encoder;
293
294         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
295         if (!nv_encoder)
296                 return -ENOMEM;
297         encoder = to_drm_encoder(nv_encoder);
298
299         nv_encoder->dcb = entry;
300         nv_encoder->or = ffs(entry->or) - 1;
301
302         drm_encoder_init(connector->dev, encoder, &nv50_dac_encoder_funcs,
303                          DRM_MODE_ENCODER_DAC);
304         drm_encoder_helper_add(encoder, &nv50_dac_helper_funcs);
305
306         encoder->possible_crtcs = entry->heads;
307         encoder->possible_clones = 0;
308
309         drm_mode_connector_attach_encoder(connector, encoder);
310         return 0;
311 }
312