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Save/restore VGA color palette while suspending and resuming.

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This commit is contained in:
Jung-uk Kim 2009-11-04 00:58:20 +00:00
parent 1f45f0733b
commit 7ac3e951e3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=198866
2 changed files with 33 additions and 10 deletions
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1
sys/dev/fb/vgareg.h
View File

@ -70,6 +70,7 @@ struct video_adapter;
typedef struct vga_softc {
struct video_adapter *adp;
void *state_buf;
void *pal_buf;
#ifdef FB_INSTALL_CDEV
genfb_softc_t gensc;
#endif

42
sys/isa/vga_isa.c
View File

@ -179,17 +179,33 @@ isavga_suspend(device_t dev)
nbytes = vidd_save_state(sc->adp, NULL, 0);
if (nbytes <= 0)
return (0);
sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO);
if (sc->state_buf == NULL)
return (0);
if (bootverbose)
device_printf(dev, "saving %d bytes of video state\n", nbytes);
if (vidd_save_state(sc->adp, sc->state_buf, nbytes) != 0) {
device_printf(dev, "failed to save state (nbytes=%d)\n",
nbytes);
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT);
if (sc->state_buf != NULL) {
if (bootverbose)
device_printf(dev, "saving %d bytes of video state\n",
nbytes);
if (vidd_save_state(sc->adp, sc->state_buf, nbytes) != 0) {
device_printf(dev, "failed to save state (nbytes=%d)\n",
nbytes);
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
}
}
/* Save the color palette across the suspend. */
if (sc->pal_buf != NULL)
free(sc->pal_buf, M_TEMP);
sc->pal_buf = malloc(256 * 3, M_TEMP, M_NOWAIT);
if (sc->pal_buf != NULL) {
if (bootverbose)
device_printf(dev, "saving color palette\n");
if (vidd_save_palette(sc->adp, sc->pal_buf) != 0) {
device_printf(dev, "failed to save palette\n");
free(sc->pal_buf, M_TEMP);
sc->pal_buf = NULL;
}
}
return (0);
}
@ -205,6 +221,12 @@ isavga_resume(device_t dev)
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
}
if (sc->pal_buf != NULL) {
if (vidd_load_palette(sc->adp, sc->pal_buf) != 0)
device_printf(dev, "failed to reload palette\n");
free(sc->pal_buf, M_TEMP);
sc->pal_buf = NULL;
}
bus_generic_resume(dev);
return 0;