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cg3: make display updates thread safe 

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-id: 1494449551-20227-2-git-send-email-mark.cave-ayland@ilande.co.uk
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Mark Cave-Ayland 2017-05-10 21:52:30 +01:00 committed by Gerd Hoffmann
parent 76d20ea0f1
commit 344a68bf9d
1 changed files with 21 additions and 20 deletions
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41
hw/display/cg3.c
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@ -94,7 +94,8 @@ static void cg3_update_display(void *opaque)
uint32_t dval;
int x, y, y_start;
unsigned int width, height;
ram_addr_t page, page_min, page_max;
ram_addr_t page;
DirtyBitmapSnapshot *snap = NULL;
if (surface_bits_per_pixel(surface) != 32) {
return;
@ -103,29 +104,32 @@ static void cg3_update_display(void *opaque)
height = s->height;
y_start = -1;
page_min = -1;
page_max = 0;
page = 0;
pix = memory_region_get_ram_ptr(&s->vram_mem);
data = (uint32_t *)surface_data(surface);
memory_region_sync_dirty_bitmap(&s->vram_mem);
if (!s->full_update) {
memory_region_sync_dirty_bitmap(&s->vram_mem);
snap = memory_region_snapshot_and_clear_dirty(&s->vram_mem, 0x0,
memory_region_size(&s->vram_mem),
DIRTY_MEMORY_VGA);
}
for (y = 0; y < height; y++) {
int update = s->full_update;
int update;
page = (ram_addr_t)y * width;
update |= memory_region_get_dirty(&s->vram_mem, page, width,
DIRTY_MEMORY_VGA);
if (s->full_update) {
update = 1;
} else {
update = memory_region_snapshot_get_dirty(&s->vram_mem, snap, page,
width);
}
if (update) {
if (y_start < 0) {
y_start = y;
}
if (page < page_min) {
page_min = page;
}
if (page > page_max) {
page_max = page;
}
for (x = 0; x < width; x++) {
dval = *pix++;
@ -134,7 +138,7 @@ static void cg3_update_display(void *opaque)
}
} else {
if (y_start >= 0) {
dpy_gfx_update(s->con, 0, y_start, s->width, y - y_start);
dpy_gfx_update(s->con, 0, y_start, width, y - y_start);
y_start = -1;
}
pix += width;
@ -143,17 +147,14 @@ static void cg3_update_display(void *opaque)
}
s->full_update = 0;
if (y_start >= 0) {
dpy_gfx_update(s->con, 0, y_start, s->width, y - y_start);
}
if (page_max >= page_min) {
memory_region_reset_dirty(&s->vram_mem,
page_min, page_max - page_min, DIRTY_MEMORY_VGA);
dpy_gfx_update(s->con, 0, y_start, width, y - y_start);
}
/* vsync interrupt? */
if (s->regs[0] & CG3_CR_ENABLE_INTS) {
s->regs[1] |= CG3_SR_PENDING_INT;
qemu_irq_raise(s->irq);
}
g_free(snap);
}
static void cg3_invalidate_display(void *opaque)