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authorThierry Reding <thierry.reding@gmail.com>2013-12-13 17:31:04 +0100
committerStephen Warren <swarren@nvidia.com>2013-12-16 14:02:51 -0700
commitc537376cbbbfea2b741b39ad37d5b44104b66e56 (patch)
treef6e783e8c50ba309066cb4bda9d72b6894848548
parent9a716579660aa87a4ab4b4d1cac0686fba3707ba (diff)
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>
-rw-r--r--arch/arm/mach-tegra/powergate.c13
1 files changed, 13 insertions, 0 deletions
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;
@@ -137,6 +139,17 @@ int tegra_powergate_remove_clamping(int id)
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
*/