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, 8 insertions, 1 deletions

diff --git a/arch/arm/mach-tegra/board-harmony-panel.c b/arch/arm/mach-tegra/board-harmony-panel.c
index d9974f1b1caa..c24039652bc5 100644
--- a/arch/arm/mach-tegra/board-harmony-panel.c
+++ b/arch/arm/mach-tegra/board-harmony-panel.c
@@ -329,7 +329,8 @@ static struct platform_device *harmony_gfx_devices[] __initdata = {
 	&harmony_backlight_device,
 };
 
-int __init harmony_panel_init(void) {
+int __init harmony_panel_init(void)
+{
 	int err;
 	struct resource *res;
 
@@ -354,6 +355,12 @@ int __init harmony_panel_init(void) {
 	harmony_carveouts[1].size = tegra_carveout_size;
 #endif
 
+#ifdef CONFIG_TEGRA_GRHOST
+	err = nvhost_device_register(&tegra_grhost_device);
+	if (err)
+		return err;
+#endif
+
 	err = platform_add_devices(harmony_gfx_devices,
 				   ARRAY_SIZE(harmony_gfx_devices));
 	if (err)