Author: jkim
Date: Sat Mar 17 00:00:33 2012
New Revision: 233056
URL: http://svn.freebsd.org/changeset/base/233056
Log:
Save and restore linear frame buffer between suspend and resume.
MFC after: 1 week
Modified:
head/sys/dev/fb/vesa.c
Modified: head/sys/dev/fb/vesa.c
==============================================================================
--- head/sys/dev/fb/vesa.c Fri Mar 16 23:58:35 2012 (r233055)
+++ head/sys/dev/fb/vesa.c Sat Mar 17 00:00:33 2012 (r233056)
@@ -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, in
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, vo
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, vo
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, vo
/* 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, vo
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));
}
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