g80_output.c revision fc5a983d 
1/*
2 * Copyright (c) 2007-2008 NVIDIA, Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24
25#ifdef HAVE_CONFIG_H
26#include "config.h"
27#endif
28
29#include <strings.h>
30
31#include "g80_type.h"
32#include "g80_display.h"
33#include "g80_output.h"
34
35static unsigned G80FindLoadVal(const unsigned char *table1)
36{
37    const unsigned char *p = table1;
38    int count;
39    const CARD32 def = 340;
40
41    for(p = table1; *(CARD16*)p != 0xb8ff && p < table1 + 64000; p += 2);
42    if(p == table1 + 64000)
43        return def;
44    p += 2;
45    if(*(CARD32*)p != 0x544942)
46        return def;
47    p += 4;
48    if(*(CARD16*)p != 0x100)
49        return def;
50    p += 2;
51    if(*p != 12)
52        return def;
53    p++;
54    if(*p != 6)
55        return def;
56    p++;
57    count = *p;
58    p += 2;
59    for(; *p != 'A' && count >= 0; count--, p += 6);
60    if(count == -1)
61        return def;
62    p += 4;
63    p = table1 + *(CARD16*)p;
64    p = table1 + *(CARD16*)p;
65    if(p[0] != 0x10 || p[1] != 4 || p[2] != 4 || p[3] != 2)
66        return def;
67    return *(CARD32*)(p + 4) & 0x3ff;
68}
69
70static Bool G80ReadPortMapping(int scrnIndex, G80Ptr pNv)
71{
72    unsigned char *table2, *table3;
73    unsigned char headerSize, entries, table3Entries, table3EntSize;
74    int i;
75    CARD16 a;
76    CARD32 b;
77
78    /* Clear the i2c map to invalid */
79    for(i = 0; i < G80_NUM_I2C_PORTS; i++)
80        pNv->i2cMap[i].dac = pNv->i2cMap[i].sor = -1;
81
82    if(*(CARD16*)pNv->table1 != 0xaa55) goto fail;
83
84    a = *(CARD16*)(pNv->table1 + 0x36);
85    table2 = (unsigned char*)pNv->table1 + a;
86
87    if(table2[0] != 0x40) goto fail;
88
89    b = *(CARD32*)(table2 + 6);
90    if(b != 0x4edcbdcb) goto fail;
91
92    table3 = (unsigned char*)pNv->table1 + *(CARD16*)(table2 + 4);
93    table3Entries = table3[2];
94    table3EntSize = table3[3];
95    table3 += table3[1];
96
97    headerSize = table2[1];
98    entries = table2[2];
99
100    for(i = 0; i < entries; i++) {
101        int type, port, portType;
102        ORNum or;
103
104        b = *(CARD32*)&table2[headerSize + 8*i];
105        type = b & 0xf;
106        port = (b >> 4) & 0xf;
107        or = ffs((b >> 24) & 0xf) - 1;
108
109        if(b & 0x300000)
110            /* Can't handle this type of output yet */
111            continue;
112
113        if(type == 0xe) break;
114
115        switch(type) {
116            case 0: /* CRT */
117                if(port >= table3Entries) {
118                    xf86DrvMsg(scrnIndex, X_WARNING,
119                               "VGA%d: invalid port %d\n", or, port);
120                    break;
121                }
122                b = *(CARD32*)&table3[table3EntSize * port];
123                port = b & 0xff;
124                portType = b >> 24;
125                if(portType != 5) {
126                    xf86DrvMsg(scrnIndex, X_WARNING,
127                               "VGA%d: invalid port type %d\n", or, portType);
128                    break;
129                }
130                if(pNv->i2cMap[port].dac != -1) {
131                    xf86DrvMsg(scrnIndex, X_WARNING,
132                               "DDC routing table corrupt!  DAC %i -> %i for "
133                               "port %i\n", or, pNv->i2cMap[port].dac, port);
134                }
135                pNv->i2cMap[port].dac = or;
136                break;
137            case 1: /* TV */
138                /* Ignore TVs */
139                break;
140
141            case 2: /* TMDS */
142                if(port >= table3Entries) {
143                    xf86DrvMsg(scrnIndex, X_WARNING,
144                               "DVI%d: invalid port %d\n", or, port);
145                    break;
146                }
147                b = *(CARD32*)&table3[table3EntSize * port];
148                port = b & 0xff;
149                portType = b >> 24;
150                if(portType != 5) {
151                    xf86DrvMsg(scrnIndex, X_WARNING,
152                               "DVI%d: invalid port type %d\n", or, portType);
153                    break;
154                }
155                if(pNv->i2cMap[port].sor != -1)
156                    xf86DrvMsg(scrnIndex, X_WARNING,
157                               "DDC routing table corrupt!  SOR %i -> %i for "
158                               "port %i\n", or, pNv->i2cMap[port].sor, port);
159                pNv->i2cMap[port].sor = or;
160                break;
161
162            case 3: /* LVDS */
163                pNv->lvds.present = TRUE;
164                pNv->lvds.or = or;
165                pNv->lvds.i2cPort = -1;
166
167                if(port == 15) {
168                    xf86DrvMsg(scrnIndex, X_INFO, "LVDS has no I2C port\n");
169                    break;
170                }
171                if(port >= table3Entries) {
172                    xf86DrvMsg(scrnIndex, X_WARNING,
173                               "LVDS: invalid port %d\n", port);
174                    break;
175                }
176                b = *(CARD32*)&table3[table3EntSize * port];
177                port = b & 0xff;
178                portType = b >> 24;
179                if(portType != 5) {
180                    xf86DrvMsg(scrnIndex, X_WARNING,
181                               "LVDS: invalid port type %d\n", portType);
182                    break;
183                }
184                pNv->lvds.i2cPort = port;
185
186                break;
187
188            default:
189                break;
190        }
191    }
192
193    xf86DrvMsg(scrnIndex, X_PROBED, "Connector map:\n");
194    if(pNv->lvds.present)
195        xf86DrvMsg(scrnIndex, X_PROBED, "  [N/A] -> SOR%i (LVDS)\n", pNv->lvds.or);
196    for(i = 0; i < G80_NUM_I2C_PORTS; i++) {
197        if(pNv->i2cMap[i].dac != -1)
198            xf86DrvMsg(scrnIndex, X_PROBED, "  Bus %i -> DAC%i\n", i, pNv->i2cMap[i].dac);
199        if(pNv->i2cMap[i].sor != -1)
200            xf86DrvMsg(scrnIndex, X_PROBED, "  Bus %i -> SOR%i\n", i, pNv->i2cMap[i].sor);
201    }
202
203    pNv->loadVal = G80FindLoadVal(pNv->table1);
204    xf86DrvMsg(scrnIndex, X_PROBED, "Load detection: %d\n", pNv->loadVal);
205
206    return TRUE;
207
208fail:
209    xf86DrvMsg(scrnIndex, X_ERROR, "Couldn't find the DDC routing table.  "
210               "Mode setting will probably fail!\n");
211    return FALSE;
212}
213
214static CARD32 i2cAddr(const int port)
215{
216    const CARD32 base = (port > 3) ? 0x0000E1E0 : 0x0000E138;
217    return base + port * 0x18;
218}
219
220static void G80_I2CPutBits(I2CBusPtr b, int clock, int data)
221{
222    G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
223    pNv->reg[i2cAddr(b->DriverPrivate.val)/4] = 4 | clock | data << 1;
224}
225
226static void G80_I2CGetBits(I2CBusPtr b, int *clock, int *data)
227{
228    G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
229    unsigned char val;
230
231    val = pNv->reg[i2cAddr(b->DriverPrivate.val)/4];
232    *clock = !!(val & 1);
233    *data = !!(val & 2);
234}
235
236static I2CBusPtr
237G80I2CInit(ScrnInfoPtr pScrn, const char *name, const int port)
238{
239    I2CBusPtr i2c;
240
241    /* Allocate the I2C bus structure */
242    i2c = xf86CreateI2CBusRec();
243    if(!i2c) return NULL;
244
245    i2c->BusName = strdup(name);
246    i2c->scrnIndex = pScrn->scrnIndex;
247    i2c->I2CPutBits = G80_I2CPutBits;
248    i2c->I2CGetBits = G80_I2CGetBits;
249    i2c->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */
250    i2c->StartTimeout = 550;
251    i2c->BitTimeout = 40;
252    i2c->ByteTimeout = 40;
253    i2c->AcknTimeout = 40;
254    i2c->DriverPrivate.val = port;
255
256    if(xf86I2CBusInit(i2c)) {
257        return i2c;
258    } else {
259        xfree(i2c);
260        return NULL;
261    }
262}
263
264void
265G80OutputSetPClk(xf86OutputPtr output, int pclk)
266{
267    G80OutputPrivPtr pPriv = output->driver_private;
268    if(pPriv->set_pclk)
269        pPriv->set_pclk(output, pclk);
270}
271
272int
273G80OutputModeValid(xf86OutputPtr output, DisplayModePtr mode)
274{
275    if(mode->Clock > 400000)
276        return MODE_CLOCK_HIGH;
277    if(mode->Clock < 25000)
278        return MODE_CLOCK_LOW;
279
280    return MODE_OK;
281}
282
283void
284G80OutputPrepare(xf86OutputPtr output)
285{
286}
287
288void
289G80OutputCommit(xf86OutputPtr output)
290{
291}
292
293static xf86MonPtr
294ProbeDDC(I2CBusPtr i2c)
295{
296    ScrnInfoPtr pScrn = xf86Screens[i2c->scrnIndex];
297    G80Ptr pNv = G80PTR(pScrn);
298    xf86MonPtr monInfo = NULL;
299    const int bus = i2c->DriverPrivate.val;
300    const CARD32 addr = i2cAddr(bus);
301
302    xf86DrvMsg(pScrn->scrnIndex, X_INFO,
303            "Probing for EDID on I2C bus %i...\n", bus);
304    pNv->reg[addr/4] = 7;
305    /* Should probably use xf86OutputGetEDID here */
306    monInfo = xf86DoEDID_DDC2(pScrn->scrnIndex, i2c);
307    pNv->reg[addr/4] = 3;
308
309    if(monInfo) {
310        xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
311                "DDC detected a %s:\n", monInfo->features.input_type ?
312                "DFP" : "CRT");
313        xf86PrintEDID(monInfo);
314    } else {
315        xf86DrvMsg(pScrn->scrnIndex, X_INFO, "  ... none found\n");
316    }
317
318    return monInfo;
319}
320
321/*
322 * Read an EDID from the i2c port.  Perform load detection on the DAC (if
323 * present) to see if the display is connected via VGA.  Sets the cached status
324 * of both outputs.  The status is marked dirty again in the BlockHandler.
325 */
326void G80OutputPartnersDetect(xf86OutputPtr dac, xf86OutputPtr sor, I2CBusPtr i2c)
327{
328    xf86MonPtr monInfo = ProbeDDC(i2c);
329    xf86OutputPtr connected = NULL;
330    Bool load = dac && G80DacLoadDetect(dac);
331
332    if(dac) {
333        G80OutputPrivPtr pPriv = dac->driver_private;
334
335        if(load) {
336            pPriv->cached_status = XF86OutputStatusConnected;
337            connected = dac;
338        } else {
339            pPriv->cached_status = XF86OutputStatusDisconnected;
340        }
341    }
342
343    if(sor) {
344        G80OutputPrivPtr pPriv = sor->driver_private;
345
346        if(monInfo && !load) {
347            pPriv->cached_status = XF86OutputStatusConnected;
348            connected = sor;
349        } else {
350            pPriv->cached_status = XF86OutputStatusDisconnected;
351        }
352    }
353
354    if(connected)
355        xf86OutputSetEDID(connected, monInfo);
356}
357
358/*
359 * Reset the cached output status for all outputs.  Called from G80BlockHandler.
360 */
361void
362G80OutputResetCachedStatus(ScrnInfoPtr pScrn)
363{
364    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
365    int i;
366
367    for(i = 0; i < xf86_config->num_output; i++) {
368        G80OutputPrivPtr pPriv = xf86_config->output[i]->driver_private;
369        pPriv->cached_status = XF86OutputStatusUnknown;
370    }
371}
372
373DisplayModePtr
374G80OutputGetDDCModes(xf86OutputPtr output)
375{
376    /* The EDID is read as part of the detect step */
377    output->funcs->detect(output);
378    return xf86OutputGetEDIDModes(output);
379}
380
381void
382G80OutputDestroy(xf86OutputPtr output)
383{
384    G80OutputPrivPtr pPriv = output->driver_private;
385
386    if(pPriv->partner)
387        ((G80OutputPrivPtr)pPriv->partner->driver_private)->partner = NULL;
388    else
389        xf86DestroyI2CBusRec(pPriv->i2c, TRUE, TRUE);
390    pPriv->i2c = NULL;
391}
392
393Bool
394G80CreateOutputs(ScrnInfoPtr pScrn)
395{
396    G80Ptr pNv = G80PTR(pScrn);
397    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
398    int i;
399
400    if(!G80ReadPortMapping(pScrn->scrnIndex, pNv))
401        return FALSE;
402
403    /* For each DDC port, create an output for the attached ORs */
404    for(i = 0; i < G80_NUM_I2C_PORTS; i++) {
405        xf86OutputPtr dac = NULL, sor = NULL;
406        I2CBusPtr i2c;
407        char i2cName[16];
408
409        if(pNv->i2cMap[i].dac == -1 && pNv->i2cMap[i].sor == -1)
410            /* No outputs on this port */
411            continue;
412
413        snprintf(i2cName, sizeof(i2cName), "I2C%i", i);
414        i2c = G80I2CInit(pScrn, i2cName, i);
415        if(!i2c) {
416            xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
417                       "Failed to initialize I2C for port %i.\n",
418                       i);
419            continue;
420        }
421
422        if(pNv->i2cMap[i].dac != -1)
423            dac = G80CreateDac(pScrn, pNv->i2cMap[i].dac);
424        if(pNv->i2cMap[i].sor != -1)
425            sor = G80CreateSor(pScrn, pNv->i2cMap[i].sor, TMDS);
426
427        if(dac) {
428            G80OutputPrivPtr pPriv = dac->driver_private;
429
430            pPriv->partner = sor;
431            pPriv->i2c = i2c;
432            pPriv->scale = G80_SCALE_OFF;
433        }
434        if(sor) {
435            G80OutputPrivPtr pPriv = sor->driver_private;
436
437            pPriv->partner = dac;
438            pPriv->i2c = i2c;
439            pPriv->scale = G80_SCALE_ASPECT;
440        }
441    }
442
443    if(pNv->lvds.present) {
444        xf86OutputPtr lvds = G80CreateSor(pScrn, pNv->lvds.or, LVDS);
445        G80OutputPrivPtr pPriv = lvds->driver_private;
446
447        pPriv->scale = G80_SCALE_ASPECT;
448
449        if(pNv->lvds.i2cPort != -1) {
450            I2CBusPtr i2c;
451            char i2cName[16];
452
453            snprintf(i2cName, sizeof(i2cName), "I2C%i (LVDS)", pNv->lvds.i2cPort);
454            pPriv->i2c = G80I2CInit(pScrn, i2cName, pNv->lvds.i2cPort);
455            if(!pPriv->i2c) {
456                xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
457                           "Failed to initialize I2C for port %i (LVDS)!\n",
458                           pNv->lvds.i2cPort);
459            }
460        }
461    }
462
463    /* For each output, set the crtc and clone masks */
464    for(i = 0; i < xf86_config->num_output; i++) {
465        xf86OutputPtr output = xf86_config->output[i];
466
467        /* Any output can connect to any head */
468        output->possible_crtcs = 0x3;
469        output->possible_clones = 0;
470    }
471
472    return TRUE;
473}
474