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| author | jkim <jkim@FreeBSD.org> | 2012-03-17 00:00:33 +0000 |
|---|---|---|
| committer | jkim <jkim@FreeBSD.org> | 2012-03-17 00:00:33 +0000 |
| commit | 971b05384cd8b7e69c6e3d8bf78276a9a2a29f9f (patch) | |
| tree | c666359fd63082bd2075c5a3e95da8154883c6d5 /sys/dev/fb/vesa.c | |
| parent | 6cf86670c6993bb7fc2bb291080185e372a91f87 (diff) | |
| download | FreeBSD-src-971b05384cd8b7e69c6e3d8bf78276a9a2a29f9f.zip FreeBSD-src-971b05384cd8b7e69c6e3d8bf78276a9a2a29f9f.tar.gz | |
Save and restore linear frame buffer between suspend and resume.
MFC after: 1 week
Diffstat (limited to 'sys/dev/fb/vesa.c')
| -rw-r--r-- | sys/dev/fb/vesa.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/sys/dev/fb/vesa.c b/sys/dev/fb/vesa.c index 26f57b2..5d64852 100644 --- a/sys/dev/fb/vesa.c +++ b/sys/dev/fb/vesa.c @@ -88,6 +88,8 @@ static ssize_t vesa_state_buf_size; static u_char *vesa_palette; static uint32_t vesa_palette_offs; +static void *vesa_vmem_buf; + static void *vesa_bios; static uint32_t vesa_bios_offs; static uint32_t vesa_bios_int10; @@ -1459,6 +1461,8 @@ vesa_set_border(video_adapter_t *adp, int color) static int vesa_save_state(video_adapter_t *adp, void *p, size_t size) { + vm_offset_t buf; + size_t bsize; if (adp != vesa_adp || vesa_state_buf_size == 0) return ((*prevvidsw->save_state)(adp, p, size)); @@ -1468,6 +1472,13 @@ vesa_save_state(video_adapter_t *adp, void *p, size_t size) if (size < (offsetof(adp_state_t, regs) + vesa_state_buf_size)) return (EINVAL); + buf = adp->va_buffer; + if (buf != 0) { + bsize = adp->va_buffer_size; + vesa_vmem_buf = malloc(bsize, M_DEVBUF, M_NOWAIT); + if (vesa_vmem_buf != NULL) + bcopy((void *)buf, vesa_vmem_buf, bsize); + } ((adp_state_t *)p)->sig = V_STATE_SIG; bzero(((adp_state_t *)p)->regs, vesa_state_buf_size); return (vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs)); @@ -1476,6 +1487,8 @@ vesa_save_state(video_adapter_t *adp, void *p, size_t size) static int vesa_load_state(video_adapter_t *adp, void *p) { + vm_offset_t buf; + size_t bsize; int mode; if (adp != vesa_adp) @@ -1483,6 +1496,8 @@ vesa_load_state(video_adapter_t *adp, void *p) /* Try BIOS POST to restore a sane state. */ (void)vesa_bios_post(); + buf = adp->va_buffer; + bsize = adp->va_buffer_size; mode = adp->va_mode; (void)vesa_set_mode(adp, adp->va_initial_mode); if (mode != adp->va_initial_mode) @@ -1490,6 +1505,10 @@ vesa_load_state(video_adapter_t *adp, void *p) if (((adp_state_t *)p)->sig != V_STATE_SIG) return ((*prevvidsw->load_state)(adp, p)); + if (buf != 0 && vesa_vmem_buf != NULL) { + bcopy(vesa_vmem_buf, (void *)buf, bsize); + free(vesa_vmem_buf, M_DEVBUF); + } return (vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs)); } |
