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drm: inform kernel about recently flushed areas

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Some drivers (QXL in particular) require to be notified when a part
of the mapped frame buffer memory is changed.

This commit adds a drmModeDirtyFB call after flushing changes to the
frame buffer to accomplish that.
This commit is contained in:
Dave Airlie 2013-03-26 12:11:05 -04:00 • committed by Ray Strode
parent 5f3ebd4f6d
commit 32ae2addfb
1 changed files with 19 additions and 1 deletions
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20
src/plugins/renderers/drm/ply-renderer-generic-driver.c
View file

@ -71,6 +71,8 @@ struct _ply_renderer_driver
{
int device_fd;
ply_hashtable_t *buffers;
uint32_t requires_explicit_flushing : 1;
};
static bool
@ -123,7 +125,7 @@ create_driver (int device_fd)
driver = calloc (1, sizeof (ply_renderer_driver_t));
driver->device_fd = device_fd;
driver->requires_explicit_flushing = true;
driver->buffers = ply_hashtable_new (ply_hashtable_direct_hash,
ply_hashtable_direct_compare);
@ -330,6 +332,22 @@ end_flush (ply_renderer_driver_t *driver,
buffer = get_buffer_from_id (driver, buffer_id);
assert (buffer != NULL);
if (driver->requires_explicit_flushing)
{
struct drm_clip_rect flush_area;
int ret;
flush_area.x1 = 0;
flush_area.y1 = 0;
flush_area.x2 = buffer->width;
flush_area.y2 = buffer->height;
ret = drmModeDirtyFB (driver->device_fd, buffer->id, &flush_area, 1);
if (ret == -ENOSYS)
driver->requires_explicit_flushing = false;
}
}
static void