video: tegra: l4t: set dc blank on display timeout

In case of L4T, userspace doesn't take initiative to sync
the windows upon unblank. Driver needs to specifically set
dc to blank state while blanking (normal/powerdown) for
subsequent unblank call to re-sync all the windows. If not
display remains blank.

bug 200136625
bug 200144212
bug 200171335

Change-Id: I5b1e172e6fddfddb7bfdcd9e54afa810baf2bbef
Signed-off-by: Naveen Kumar S <nkumars@nvidia.com>
Reviewed-on: http://git-master/r/932191
(cherry picked from commit c4437f442f8927d2ac4c0190aa255e5fee756588)
Reviewed-on: http://git-master/r/1020615
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

diff --git a/drivers/video/tegra/fb.c b/drivers/video/tegra/fb.c
index 0a0b9bbc9dadd49126f5cc76412a6dd9ae8ccfeb..7bc016f0033c26673a254c92fe09f45c562cb4b3 100644 (file)
--- a/drivers/video/tegra/fb.c
+++ b/drivers/video/tegra/fb.c
@@ -356,6 +356,9 @@ static int tegra_fb_blank(int blank, struct fb_info *info)
                if (!dc->suspended && dc->enabled)
                        tegra_fb->curr_xoffset = -1;
                tegra_dc_disable(dc);
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE
+               dc->blanked = true;
+#endif
                return 0;
 
        default: