diff options
| author | Jay Agarwal <jagarwal@nvidia.com> | 2012-08-16 18:08:12 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 12:32:34 -0700 |
| commit | c440ec790d28c279058b1bb5e6006e6d3f7e3781 (patch) | |
| tree | 34e54d006517c11a8732ac94925e4a3524e0c213 /arch | |
| parent | e70eb14b4a80ab68186da4635105756e298b0776 (diff) | |
arm: tegra: pcie: WAR to avoid hang on PCIe device
Setting DFPCI_RSPPASSPW bit in AFI_CONFIGURATION
register to avoid instant hang on CPU read/write
while gpu transfers are in progress.
Bug 1034443
Change-Id: I40c99588753b8b2cb2d418b54c6ac73f7b8ddc13
Signed-off-by: Jay Agarwal <jagarwal@nvidia.com>
Reviewed-on: http://git-master/r/124037
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Rebase-Id: R9a9557b686bd5f8770ed426856189a0ee2a040f5
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-tegra/pcie.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c index 94c6873dc2e1..5816fe73a713 100644 --- a/arch/arm/mach-tegra/pcie.c +++ b/arch/arm/mach-tegra/pcie.c @@ -107,6 +107,7 @@ #define AFI_CONFIGURATION 0xac #define AFI_CONFIGURATION_EN_FPCI (1 << 0) +#define AFI_CONFIGURATION_DFPCI_RSPPASSPW (1 << 2) #define AFI_FPCI_ERROR_MASKS 0xb0 @@ -857,8 +858,11 @@ static int tegra_pcie_enable_controller(void) /* Take the PCIe interface module out of reset */ tegra_periph_reset_deassert(tegra_pcie.pcie_xclk); + /* WAR avoid hang on CPU read/write while gpu transfers in progress */ + val = afi_readl(AFI_CONFIGURATION) | AFI_CONFIGURATION_DFPCI_RSPPASSPW; + /* Finally enable PCIe */ - val = afi_readl(AFI_CONFIGURATION) | AFI_CONFIGURATION_EN_FPCI; + val |= AFI_CONFIGURATION_EN_FPCI; afi_writel(val, AFI_CONFIGURATION); val = (AFI_INTR_EN_INI_SLVERR | AFI_INTR_EN_INI_DECERR | |