From c537376cbbbfea2b741b39ad37d5b44104b66e56 Mon Sep 17 00:00:00 2001
From: Thierry Reding <thierry.reding@gmail.com>
Date: Fri, 13 Dec 2013 17:31:04 +0100
Subject: [PATCH] ARM: tegra: Special-case the 3D clamps on Tegra124
A separate register is used to remove the clamps for the GPU on
Tegra124. In order to be able to use the same API, special-case
this particular partition.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
arch/arm/mach-tegra/powergate.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
index a8ac634eda77..0026fb6c984b 100644
--- a/arch/arm/mach-tegra/powergate.c
+++ b/arch/arm/mach-tegra/powergate.c
@@ -41,6 +41,8 @@
#define PWRGATE_STATUS 0x38
+#define GPU_RG_CNTRL 0x2d4
+
static int tegra_num_powerdomains;
static int tegra_num_cpu_domains;
static const u8 *tegra_cpu_domains;
@@ -136,6 +138,17 @@ int tegra_powergate_remove_clamping(int id)
if (id < 0 || id >= tegra_num_powerdomains)
return -EINVAL;
+ /*
+ * The Tegra124 GPU has a separate register (with different semantics)
+ * to remove clamps.
+ */
+ if (tegra_chip_id == TEGRA124) {
+ if (id == TEGRA_POWERGATE_3D) {
+ pmc_write(0, GPU_RG_CNTRL);
+ return 0;
+ }
+ }
+
/*
* Tegra 2 has a bug where PCIE and VDE clamping masks are
* swapped relatively to the partition ids
--
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