ARM: tegra: move VPR configuration to a later stage

U-boot is responsible for enabling the GPU DT node after all necessary
configuration (VPR setup for T124) is performed. In order to be able to
check whether this configuration has been performed right before booting
the kernel, make it happen during board_init().

Also move VPR configuration into the more generic gpu.c file, which will
also host other GPU-related functions, and let boards specify
individually whether they need VPR setup or not.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Tom Warren <twarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

6 files changed, 46 insertions, 18 deletions

diff --git a/arch/arm/include/asm/arch-tegra/ap.h b/arch/arm/include/asm/arch-tegra/ap.h
index 76773b7ec7..8c2586c6f5 100644
--- a/arch/arm/include/asm/arch-tegra/ap.h
+++ b/arch/arm/include/asm/arch-tegra/ap.h
@@ -64,15 +64,6 @@ int tegra_get_sku_info(void);
 /* Do any chip-specific cache config */
 void config_cache(void);
 
-#if defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA210)
-/* Do chip-specific vpr config */
-void config_vpr(void);
-#else
-static inline void config_vpr(void)
-{
-}
-#endif
-
 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
 bool tegra_cpu_is_non_secure(void);
 #endif
diff --git a/arch/arm/include/asm/arch-tegra/gpu.h b/arch/arm/include/asm/arch-tegra/gpu.h
new file mode 100644
index 0000000000..b347a21835
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/gpu.h
@@ -0,0 +1,27 @@
+/*
+ *  (C) Copyright 2015
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_TEGRA_GPU_H
+#define __ASM_ARCH_TEGRA_GPU_H
+
+#if defined(CONFIG_TEGRA_GPU)
+
+void config_gpu(void);
+bool gpu_configured(void);
+
+#else /* CONFIG_TEGRA_GPU */
+
+static inline void config_gpu(void)
+{
+}
+
+static inline bool gpu_configured(void)
+{
+	return false;
+}
+
+#endif /* CONFIG_TEGRA_GPU */
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 0db8ee05bd..75924ad848 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -24,9 +24,7 @@ obj-y += pinmux-common.o
 obj-y += powergate.o
 obj-y += xusb-padctl.o
 obj-$(CONFIG_DISPLAY_CPUINFO) += sys_info.o
-#TCW Fix this to use a common config switch (CONFIG_LOCK_VPR?)
-obj-$(CONFIG_TEGRA124) += vpr.o
-obj-$(CONFIG_TEGRA210) += vpr.o
+obj-$(CONFIG_TEGRA_GPU) += gpu.o
 obj-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o
 
 ifndef CONFIG_SPL_BUILD
diff --git a/arch/arm/mach-tegra/ap.c b/arch/arm/mach-tegra/ap.c
index e62dda5a6b..b4229f4575 100644
--- a/arch/arm/mach-tegra/ap.c
+++ b/arch/arm/mach-tegra/ap.c
@@ -226,8 +226,5 @@ void s_init(void)
 
 	/* enable SMMU */
 	smmu_enable();
-
-	/* init vpr */
-	config_vpr();
 }
 #endif
diff --git a/arch/arm/mach-tegra/board2.c b/arch/arm/mach-tegra/board2.c
index 41e9341874..37953cfda8 100644
--- a/arch/arm/mach-tegra/board2.c
+++ b/arch/arm/mach-tegra/board2.c
@@ -29,6 +29,7 @@
 #include <asm/arch-tegra/sys_proto.h>
 #include <asm/arch-tegra/uart.h>
 #include <asm/arch-tegra/warmboot.h>
+#include <asm/arch-tegra/gpu.h>
 #ifdef CONFIG_TEGRA_CLOCK_SCALING
 #include <asm/arch/emc.h>
 #endif
@@ -126,6 +127,8 @@ int board_init(void)
 	clock_init();
 	clock_verify();
 
+	config_gpu();
+
 #ifdef CONFIG_TEGRA_SPI
 	pin_mux_spi();
 #endif
diff --git a/arch/arm/mach-tegra/vpr.c b/arch/arm/mach-tegra/gpu.c
index f695811c9b..b2fa50b540 100644
--- a/arch/arm/mach-tegra/vpr.c
+++ b/arch/arm/mach-tegra/gpu.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -21,8 +21,11 @@
 #include <asm/arch/tegra.h>
 #include <asm/arch/mc.h>
 
-/* Configures VPR.  Right now, all we do is turn it off. */
-void config_vpr(void)
+#include <fdt_support.h>
+
+static bool _configured;
+
+void config_gpu(void)
 {
 	struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
 
@@ -32,4 +35,13 @@ void config_vpr(void)
 	       &mc->mc_video_protect_reg_ctrl);
 	/* read back to ensure the write went through */
 	readl(&mc->mc_video_protect_reg_ctrl);
+
+	debug("configured VPR\n");
+
+	_configured = true;
+}
+
+bool vpr_configured(void)
+{
+	return _configured;
 }