Tegra210: enable WRAP to INCR burst type conversions
The Memory Select Switch Controller routes any CPU transactions to
the appropriate slave depending on the transaction address. During
system suspend, it loses all config settings and hence the CPU has
to restore them during resume.
This patch restores the controller's settings for enabling WRAP to
INCR burst type conversions on the master ports, for any incoming
requests from the AXI slave ports.
Tested by performing multiple system suspend cycles.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c b/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
index 578dd8e..57be347 100644
--- a/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
+++ b/plat/nvidia/tegra/soc/t210/plat_psci_handlers.c
@@ -120,12 +120,23 @@
int tegra_soc_prepare_cpu_on_finish(unsigned long mpidr)
{
+ uint32_t val;
+
/*
* Check if we are exiting from SOC_POWERDN.
*/
if (tegra_system_suspended()) {
/*
+ * Enable WRAP to INCR burst type conversions for
+ * incoming requests on the AXI slave ports.
+ */
+ val = mmio_read_32(TEGRA_MSELECT_BASE + MSELECT_CONFIG);
+ val &= ~ENABLE_UNSUP_TX_ERRORS;
+ val |= ENABLE_WRAP_TO_INCR_BURSTS;
+ mmio_write_32(TEGRA_MSELECT_BASE + MSELECT_CONFIG, val);
+
+ /*
* Restore Boot and Power Management Processor (BPMP) reset
* address and reset it.
*/