This patch checks if framebuffer is unblanked before
we actually trigger panning in custom pan display
function.
Signed-off-by: Liu Ying <Ying.Liu@xxxxxxxxxxxxx>
---
drivers/video/mx3fb.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index e3406ab..d53db60 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -1063,6 +1063,11 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var,
dev_dbg(fbi->device, "%s [%c]\n", __func__,
list_empty(&mx3_fbi->idmac_channel->queue) ? '-' : '+');
+ if (mx3_fbi->blank != FB_BLANK_UNBLANK) {
+ dev_dbg(fbi->device, "panning with fb blanked not supported\n");
+ return -EFAULT;
+ }
+
if (var->xoffset > 0) {
dev_dbg(fbi->device, "x panning not supported\n");
return -EINVAL;
--
1.7.1
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