remoteproc: k3-r5: Fix rproc init failure on Split-mode _only_ devices
The R5F subsystem/cluster on K3 SoCs can support both LockStep and
Split-modes (superset) or just Split-mode depending on an eFUSE
capability register. The LockStep configuration bit is Read-only
though on Split-mode _only_ devices and as such the System Firmware
does not allow the LockStep mode bit to be configured on such devices.
The current logic in k3_r5f_rproc_configure() fails on Split-mode
devices because of this unconditional programming of the LockStep
mode bit, and results in the probe failure shown during the
"rproc init" step at U-Boot prompt.
Fix this by limiting the LockStep mode bit clear configuration only on
devices supporting both LockStep/Split-modes.
Fixes: 4c850356a83f ("remoteproc: Introduce K3 remoteproc driver for R5F subsystem")
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
diff --git a/drivers/remoteproc/ti_k3_r5f_rproc.c b/drivers/remoteproc/ti_k3_r5f_rproc.c
index 2e2665f..c01b29d 100644
--- a/drivers/remoteproc/ti_k3_r5f_rproc.c
+++ b/drivers/remoteproc/ti_k3_r5f_rproc.c
@@ -543,6 +543,7 @@
{
struct k3_r5f_cluster *cluster = core->cluster;
u32 set_cfg = 0, clr_cfg = 0, cfg, ctrl, sts;
+ bool lockstep_permitted;
u64 boot_vec = 0;
int ret;
@@ -560,8 +561,9 @@
goto out;
/* Sanity check for Lockstep mode */
- if (cluster->mode && is_primary_core(core) &&
- !(sts & PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED)) {
+ lockstep_permitted = !!(sts &
+ PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED);
+ if (cluster->mode && is_primary_core(core) && !lockstep_permitted) {
dev_err(core->dev, "LockStep mode not permitted on this device\n");
ret = -EINVAL;
goto out;
@@ -573,7 +575,7 @@
clr_cfg |= PROC_BOOT_CFG_FLAG_R5_TEINIT;
if (cluster->mode == CLUSTER_MODE_LOCKSTEP)
set_cfg |= PROC_BOOT_CFG_FLAG_R5_LOCKSTEP;
- else
+ else if (lockstep_permitted)
clr_cfg |= PROC_BOOT_CFG_FLAG_R5_LOCKSTEP;
}