2 * ti omap35 display subsystem (dss)
4 * can handle 2ⁿ bits per pixel for 0 < n ≤ 4, and 12 and 24 bits.
5 * can handle 1024×768 at 60 Hz with pixel clock of 63.5 MHz
6 * 1280×800 at 59.91 Hz with pixel clock of 71 MHz
7 * 1400×1050 lcd at 50 MHz with pixel clock of 75 MHz
8 * has 256 24-bit entries in RGB palette
11 #include "../port/lib.h"
17 #include "../port/error.h"
27 Tabstop = 4, /* should be 8 */
28 Scroll = 8, /* lines to scroll at one time */
30 * screen settings for Wid and Ht, should a bit more dynamic?
31 * http://www.epanorama.net/faq/vga2rgb/calc.html
32 * used to calculate settings.
35 // Hbp = (248-1) << 20,
51 EnableWakeup = 1 << 2,
73 // Lcden = 1 << 0, /* unused */
76 typedef struct Dispcregs Dispc;
77 typedef struct Dssregs Dss;
78 typedef struct Ioregs Ioregs;
80 struct Ioregs { /* common registers, 68 (0x44) bytes */
82 uchar _pad0[0x10-0x4];
98 struct Dssregs { /* display subsys at 0x48050000 */
102 uchar _pad3[0x5c-0x4c];
106 struct Dispcregs { /* display ctlr at 0x48050400 */
110 ulong defaultcolor[2];
122 ulong base[2]; /* should allocate both to avoid dithering */
132 ulong palette; /* gfx_table_ba */
133 uchar _pad5[0x5d4 - 0x4bc];
136 uchar _pad5[0x620 - 0x5e0];
145 Settings settings[] = {
146 [Res800x600] { 800, 600, 60, RGB16, 40000, 88, 40, 128, 23, 1, 5, },
147 [Res1024x768] { 1024, 768, 60, RGB16, 65000, 160, 24, 136, 29, 3, 7, },
148 [Res1280x1024] { 1280, 1024, 60, RGB16, 108000, 248, 48, 112, 38, 1, 4, },
149 [Res1400x1050] { 1400, 1050, 50, RGB16, 108000, 248, 48, 112, 38, 1, 4, }, // TODO
154 static Memdata xgdata;
156 static Memimage xgscreen =
158 { 0, 0, Wid, Ht }, /* r */
159 { 0, 0, Wid, Ht }, /* clipr */
166 Wid*(Depth/BI2BY)/BY2WD, /* width in words of a single scan line */
171 static Memimage *conscol;
172 static Memimage *back;
174 static Memsubfont *memdefont;
176 static Lock screenlock;
180 static int landscape = 0; /* screen orientation, default is 0: portrait */
181 static ushort *vscreen; /* virtual screen */
182 static Rectangle window;
184 static Dispc *dispc = (Dispc *)PHYSDISPC;
185 static Dss *dss = (Dss *)PHYSDSS;
187 static void omapscreenputs(char *s, int n);
188 static ulong rep(ulong, int);
189 static void screenputc(char *buf);
190 static void screenwin(void);
195 dispc->ctrl &= ~1; /* disable the lcd */
198 dispc->irqstat1 |= 1; /* set framedone */
201 /* the lcd never comes ready, so don't bother with this */
203 /* spin until the frame is complete, but not forever */
204 for(cnt = 50; !(dispc->irqstat1 & 1) && cnt-- > 0; )
207 delay(20); /* worst case for 1 frame, 50Hz */
213 /* should reset the dss system */
218 /* see spruf98i §15.6.7.4.2 */
224 sp = oscreen.settings;
225 dss->ctrl &= 0x78; /* choose dss clock */
226 dispc->sysconf = Midlemode | Sidlemode | EnableWakeup | Autoidle;
227 dispc->config = Loadmode;
231 dispc->defaultcolor[0] = 0; /* set background color to black? */
232 dispc->defaultcolor[1] = 0;
233 dispc->transcolor[0] = 0; /* set transparency to full */
234 dispc->transcolor[1] = 0;
236 dispc->timing_h = (sp->hbp-1) << 20 | (sp->hfp-1) << 8 |
238 dispc->timing_v = sp->vbp << 20 | sp->vfp << 8 |
241 dispc->pol_req = Ipc | Ihs | Ivs | Acb;
242 dispc->divisor = 1 << 16 | ((432000+sp->pixelclock-1)/sp->pixelclock);
244 dispc->lcdsize = (sp->ht - 1) << 16 | (sp->wid - 1);
247 dispc->base[0] = PADDR(framebuf->pixel);
248 dispc->base[1] = PADDR(framebuf->pixel);
250 dispc->pos = 0; /* place screen in the left corner */
251 /* use the whole screen */
252 dispc->size = (sp->ht - 1) << 16 | (sp->wid - 1);
254 /* what mode does plan 9 use for fb? */
255 dispc->attrib = Burstsize | Format | Gfxenable;
257 dispc->preload = Tft;
258 dispc->fifosize = Fifosize;
259 /* 1008 is max for our Burstsize */
260 dispc->fifothr = (Fifosize - 1) << 16 | (1008 - 1);
262 /* 1 byte is one pixel (not true, we use 2 bytes per pixel) */
265 dispc->winskip = 0; /* don't skip anything */
268 // dispc->palette = PADDR(framebuf->palette);
274 dispc->ctrl = Gpout1 | Gpout0 | Tftdata | Digital | Lcd | Stntft |
298 /* Paint the image data with blue pixels */
304 for (i = nelem(framebuf->pixel) - 1; i >= 0; i--)
305 framebuf->pixel[i] = 0x1f; /* blue */
306 // memset(framebuf->pixel, ~0, sizeof framebuf->pixel); /* white */
312 blankscreen(on == 0);
315 /* called from devmouse */
321 swcursordraw(mousexy());
331 setcursor(Cursor* curs)
333 oscreen.Cursor = *curs;
337 /* called from main and possibly later from devdss to change resolution */
341 static int first = 1;
344 iprint("screeninit...");
345 oscreen.settings = &settings[Res1280x1024];
350 /* mode is 16*32 = 512 */
351 framebuf = xspanalloc(sizeof *framebuf, 16*32, 0);
358 memdefont = getmemdefont();
363 xgdata.bdata = (uchar *)framebuf->pixel;
366 gscreen->r = Rect(0, 0, Wid, Ht);
367 gscreen->clipr = gscreen->r;
368 /* width, in words, of a single scan line */
369 gscreen->width = Wid * (Depth / BI2BY) / BY2WD;
370 flushmemscreen(gscreen->r);
373 iprint("on: blue for 3 seconds...");
377 screenwin(); /* draw border & top orange bar */
378 screenputs = omapscreenputs;
379 iprint("screen: frame buffer at %#p for %dx%d\n",
380 framebuf, oscreen.settings->wid, oscreen.settings->ht);
382 swcursorinit(); /* needs gscreen set */
387 /* flushmemscreen should change buffer? */
389 flushmemscreen(Rectangle r)
401 if (rectclip(&r, gscreen->r) == 0)
403 start = (ulong)&framebuf->pixel[r.min.y*Wid + r.min.x];
404 end = (ulong)&framebuf->pixel[(r.max.y - 1)*Wid + r.max.x -1];
405 cachedwbse((ulong *)start, end - start);
409 * export screen to devdraw
412 attachscreen(Rectangle *r, ulong *chan, int* d, int *width, int *softscreen)
419 *chan = gscreen->chan;
420 *width = gscreen->width;
421 *softscreen = (landscape == 0);
423 gscreen->data->ref++;
424 return gscreen->data;
428 getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb)
434 setcolor(ulong p, ulong r, ulong g, ulong b)
441 blankscreen(int blank)
452 omapscreenputs(char *s, int n)
459 /* don't deadlock trying to print in interrupt */
460 if (!canlock(&screenlock))
461 return; /* discard s */
466 i = chartorune(&r, s);
489 memsetchan(gscreen, RGB16);
494 orange = allocmemimage(Rect(0, 0, 1, 1), RGB16);
495 orange->flags |= Frepl;
496 orange->clipr = gscreen->r;
497 orange->data->bdata[0] = 0x40; /* magic: colour? */
498 orange->data->bdata[1] = 0xfd; /* magic: colour? */
500 w = memdefont->info[' '].width;
501 h = memdefont->height;
503 r = insetrect(gscreen->r, 4);
505 memimagedraw(gscreen, r, memblack, ZP, memopaque, ZP, S);
506 window = insetrect(r, 4);
507 memimagedraw(gscreen, window, memwhite, ZP, memopaque, ZP, S);
509 memimagedraw(gscreen, Rect(window.min.x, window.min.y,
510 window.max.x, window.min.y + h + 5 + 6), orange, ZP, nil, ZP, S);
511 freememimage(orange);
512 window = insetrect(window, 5);
514 greet = " Plan 9 Console ";
515 p = addpt(window.min, Pt(10, 0));
516 q = memsubfontwidth(memdefont, greet);
517 memimagestring(gscreen, p, conscol, ZP, memdefont, greet);
519 window.min.y += h + 6;
521 window.max.y = window.min.y + ((window.max.y - window.min.y) / h) * h;
531 /* move window contents up Scroll text lines */
533 r = Rpt(window.min, Pt(window.max.x, window.max.y - o));
534 p = Pt(window.min.x, window.min.y + o);
535 memimagedraw(gscreen, r, gscreen, p, nil, p, S);
538 /* clear the bottom Scroll text lines */
539 r = Rpt(Pt(window.min.x, window.max.y - o), window.max);
540 memimagedraw(gscreen, r, back, ZP, nil, ZP, S);
547 screenputc(char *buf)
554 static int xbuf[256];
556 if (xp < xbuf || xp >= &xbuf[nelem(xbuf)])
561 if (curpos.y + h >= window.max.y)
568 curpos.x = window.min.x;
571 p = memsubfontwidth(memdefont, " ");
573 if (curpos.x >= window.max.x - Tabstop * w)
576 pos = (curpos.x - window.min.x) / w;
577 pos = Tabstop - pos % Tabstop;
579 r = Rect(curpos.x, curpos.y, curpos.x + pos * w, curpos.y + h);
580 memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
588 r = Rect(*xp, curpos.y, curpos.x, curpos.y + h);
589 memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
596 p = memsubfontwidth(memdefont, buf);
599 if (curpos.x >= window.max.x - w)
603 r = Rect(curpos.x, curpos.y, curpos.x + w, curpos.y + h);
604 memimagedraw(gscreen, r, back, back->r.min, nil, back->r.min, S);
605 memimagestring(gscreen, curpos, conscol, ZP, memdefont, buf);