video: tegra: host: register nvhost master device in board-xxx-panel.c

- the suspend order of devices is governed by the order
in which devices are registered
- this commit ensures that nvhost master is registered before
any of the graphics devices
- previously this was done in rootfs_init call which is
later than arch_init calls of board-xxx-panel.c
- this caused tegra-dc device to be registered *before* nvhost
master device. as a result it was suspended *later* than nvhost
master device. this is a clear violation of dependency rule
for nvhost. this caused suspend-resume to fail for L4T
- this worked on android as it has CONFIG early suspend enabled
while it failed for L4T which doesn't have CONFIG early suspend
enabled

Bug 947617

Change-Id: I6cd405f3ba23d004e7659140019f5130e6c25159
Signed-off-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-on: http://git-master/r/87756
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/board-cardhu-panel.c b/arch/arm/mach-tegra/board-cardhu-panel.c
index 7de847695f60..f6db96c67d90 100644
--- a/arch/arm/mach-tegra/board-cardhu-panel.c
+++ b/arch/arm/mach-tegra/board-cardhu-panel.c
@@ -1225,6 +1225,12 @@ int __init cardhu_panel_init(void)
 	register_early_suspend(&cardhu_panel_early_suspender);
 #endif
 
+#ifdef CONFIG_TEGRA_GRHOST
+	err = nvhost_device_register(&tegra_grhost_device);
+	if (err)
+		return err;
+#endif
+
 	err = platform_add_devices(cardhu_gfx_devices,
 				ARRAY_SIZE(cardhu_gfx_devices));