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Add shadow framebuffer support; scrolling the screen still isn't great,

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but it's noticeably better now than it was before.
This commit is contained in:
jmcneill 2007-04-13 12:21:00 +00:00
parent 2b6219117d
commit b7875ec423
1 changed files with 20 additions and 4 deletions
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24
sys/arch/sgimips/dev/crmfb.c
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@ -1,4 +1,4 @@
/* $NetBSD: crmfb.c,v 1.2 2007/04/12 22:30:48 jmcneill Exp $ */
/* $NetBSD: crmfb.c,v 1.3 2007/04/13 12:21:00 jmcneill Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: crmfb.c,v 1.2 2007/04/12 22:30:48 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: crmfb.c,v 1.3 2007/04/13 12:21:00 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -59,6 +59,8 @@ __KERNEL_RCSID(0, "$NetBSD: crmfb.c,v 1.2 2007/04/12 22:30:48 jmcneill Exp $");
#include <dev/rasops/rasops.h>
#include <dev/wscons/wsdisplay_vconsvar.h>
#define CRMFB_SHADOWFB
struct wsscreen_descr crmfb_defaultscreen = {
"default",
0, 0,
@ -174,6 +176,7 @@ struct crmfb_softc {
int sc_height;
int sc_depth;
uint32_t sc_fbsize;
uint8_t *sc_shadowfb;
int sc_wsmode;
u_char sc_cmap_red[256];
@ -302,6 +305,14 @@ crmfb_attach(struct device *parent, struct device *self, void *opaque)
printf("%s: allocated %d byte fb @ %p (%p)\n", sc->sc_dev.dv_xname,
sc->sc_fbsize, KERNADDR(sc->sc_dmai), KERNADDR(sc->sc_dma));
#ifdef CRMFB_SHADOWFB
/* setup shadow framebuffer */
sc->sc_shadowfb = malloc(sc->sc_fbsize, M_DEVBUF, M_NOWAIT | M_ZERO);
if (sc->sc_shadowfb == NULL)
aprint_error("%s: WARNING: couldn't allocate shadow fb\n",
sc->sc_dev.dv_xname);
#endif
ri = &crmfb_console_screen.scr_ri;
memset(ri, 0, sizeof(struct rasops_info));
@ -509,7 +520,7 @@ crmfb_mmap(void *v, void *vs, off_t offset, int prot)
if (offset >= 0 && offset < sc->sc_fbsize) {
pa = bus_dmamem_mmap(sc->sc_dmat, sc->sc_dma.segs,
sc->sc_dma.nsegs, offset, prot,
BUS_DMA_WAITOK | BUS_DMA_NOCACHE);
BUS_DMA_WAITOK | BUS_DMA_COHERENT);
return pa;
}
@ -547,7 +558,12 @@ crmfb_init_screen(void *c, struct vcons_screen *scr, int existing,
break;
}
ri->ri_bits = KERNADDR(sc->sc_dma);
if (sc->sc_shadowfb == NULL)
ri->ri_bits = KERNADDR(sc->sc_dma);
else {
ri->ri_bits = sc->sc_shadowfb;
ri->ri_hwbits = KERNADDR(sc->sc_dma);
}
if (existing)
ri->ri_flg |= RI_CLEAR;