ref: 5eb781093b052df92bc4ab4c052e8d4c23ca17f6
parent: f6fcd88cdb2a2d1fccb1b400c099faa15495b441
author: mia soweli <inbox@tachibana-labs.org>
date: Tue Sep 12 15:58:30 EDT 2023
screen: remove complex screen init it is sufficient to find out how large the screen is, and allocate a new framebuffer for it. no need to reset the display controller.
--- a/sys/src/9/omap/screen.c
+++ b/sys/src/9/omap/screen.c
@@ -14,22 +14,15 @@
/* display controller registers */
RDrev = 0x400,
RDsysconf = 0x410,
- DSCidle = 1<<0,
- DSCreset = 1<<1,
- DSCidlesmart = 2<<3,
RDsysstat = 0x414,
- DSSreset = 1<<0,
RDirqstat = 0x418,
RDirqen = 0x41c,
RDcontrol = 0x440,
DClcdon = 1<<0,
- DClcdactive = 1<<3,
- DClcdclockrun = 1<<27,
- DClcdenable = 1<<28,
- DClcdenablehi = 1<<29,
+ DClcdgo = 1<<5,
+ DClcdbits = 3<<8,
DClcdbits24 = 3<<8,
RDconfig = 0x444,
- DCNgamma = 1<<3,
RDdefcolor = 0x44c,
RDtranscolor = 0x454,
RDlinestat = 0x45c,
@@ -43,9 +36,6 @@
RDgfxpos = 0x488,
RDgfxsize = 0x48c,
RDgfxattr = 0x4a0,
- DGAenable = 1<<0,
- DGAfmt = 0x6<<1,
- DGAburst = 0x2<<6,
RDgfxrowinc = 0x4ac,
RDgfxpixelinc = 0x4b0,
};
@@ -55,15 +45,6 @@
Scroll = 8,
};
-#define RDdefcolorn(n) (RDdefcolor + (n)*4)
-#define RDtranscolorn(n) (RDtranscolor + (n)*4)
-
-#define RDgfxban(n) (RDgfxba + (n)*4)
-
-#define TIME(s, f, b) ((s & 0xff) | (f & 0xfff) << 8 | (b & 0xfff) << 20)
-#define POS(x, y) ((x)<<16 | (y))
-#define SIZE(w, h) ((h-1)<<16 | (w-1))
-
typedef struct Ctlr Ctlr;
struct Ctlr {Lock;
@@ -89,7 +70,7 @@
static void myscreenputs(char *s, int n);
static int
-screendatainit(Ctlr *ctlr)
+screendatainit(Ctlr *ctlr, uint x, uint y)
{Rectangle r;
@@ -96,7 +77,7 @@
if(memimageinit() < 0)
return -1;
- r = Rect(0, 0, 800, 480);
+ r = Rect(0, 0, x, y);
ctlr->scrdata.ref = 1;
ctlr->scrdata.bdata = ucalloc(r.max.x * r.max.y * 2);
if(!ctlr->scrdata.bdata)
@@ -162,45 +143,22 @@
screeninit(void)
{Ctlr *c;
+ uint x, y;
c = &ctlr;
- if(screendatainit(c) < 0)
+ if((csr32r(c, RDconfig) & DClcdbits) != DClcdbits24)
return;
+ x = ((csr32r(c, RDgfxsize) & 0x0000ffff) >> 0) + 1;;
+ y = ((csr32r(c, RDgfxsize) & 0xffff0000) >> 16) + 1;
+ if(screendatainit(c, x, y) < 0)
+ return;
+
screenwin(c);
screenputs(kmesg.buf, kmesg.n);
- /* reset the display controller */
- csr32w(c, RDsysconf, DSCreset);
- while(!(csr32r(c, RDsysstat) & DSSreset))
- ;
-
- /* configure the display controller */
- csr32w(c, RDsysconf, DSCidle | DSCidlesmart);
- csr32w(c, RDcontrol, DClcdbits24);
- csr32w(c, RDconfig, DCNgamma);
-
- /* configure display size and timings */
- csr32w(c, RDtimeh, TIME(3, 15, 11));
- csr32w(c, RDtimev, TIME(2, 3, 3));
- csr32w(c, RDsize, SIZE(800, 480));
-
- /* enable the lcd interface */
- csr32w(c, RDcontrol, csr32r(c, RDcontrol) | DClcdactive | DClcdclockrun | DClcdenablehi);
- csr32w(c, RDcontrol, csr32r(c, RDcontrol) | DClcdenable);
-
- /* configure the graphics layer */
- csr32w(c, RDgfxban(0), (uintptr) c->scrdata.bdata);
- csr32w(c, RDgfxpos, POS(c->scrimg->r.min.x, c->scrimg->r.min.y));
- csr32w(c, RDgfxsize, SIZE(c->scrimg->r.max.x, c->scrimg->r.max.y));
- csr32w(c, RDgfxattr, DGAfmt | DGAburst);
- csr32w(c, RDgfxrowinc, 1);
- csr32w(c, RDgfxpixelinc, 1);
-
- /* enable gfx pipeline and turn lcd on */
- csr32w(c, RDgfxattr, csr32r(c, RDgfxattr) | DGAenable);
- csr32w(c, RDcontrol, csr32r(c, RDcontrol) | DClcdon);
-
+ csr32w(c, RDgfxba, (uintptr) c->scrdata.bdata);
+ csr32w(c, RDcontrol, csr32r(c, RDcontrol) | DClcdgo | DClcdon);
conf.monitor = 1;
}