video: Track whether a display is in use
Mark a display as in use when display_enable() is called. This can avoid
a display being used by multiple video-output devices.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/display-uclass.c b/drivers/video/display-uclass.c
index e4763de..e752eb0 100644
--- a/drivers/video/display-uclass.c
+++ b/drivers/video/display-uclass.c
@@ -23,10 +23,19 @@
const struct display_timing *timing)
{
struct dm_display_ops *ops = display_get_ops(dev);
+ struct display_plat *disp_uc_plat;
+ int ret;
if (!ops || !ops->enable)
return -ENOSYS;
- return ops->enable(dev, panel_bpp, timing);
+ ret = ops->enable(dev, panel_bpp, timing);
+ if (ret)
+ return ret;
+
+ disp_uc_plat = dev_get_uclass_platdata(dev);
+ disp_uc_plat->in_use = true;
+
+ return 0;
}
int display_read_timing(struct udevice *dev, struct display_timing *timing)
@@ -48,6 +57,13 @@
return edid_get_timing(buf, ret, timing, &panel_bits_per_colour);
}
+bool display_in_use(struct udevice *dev)
+{
+ struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev);
+
+ return disp_uc_plat->in_use;
+}
+
UCLASS_DRIVER(display) = {
.id = UCLASS_DISPLAY,
.name = "display",