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NVIDIA: SAUCE: tegra-epl: Set default handshake retry count to 25

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BugLink: https://bugs.launchpad.net/bugs/2072591

This patch add a DT property to set handshake retry count. Default
value is set to 25. On P3898 board, Guest VM resumes quite early
because PCIe controller is disabled. Handshake usually is passing
with 20 but sometimes takes 21 iterations.

http://nvbugs/4190302

Signed-off-by: Rahul Bedarkar <rabedarkar@nvidia.com>
Signed-off-by: Satish Seelamsetti <sseelamsetti@nvidia.com>
Reviewed-by: Prathamesh Shete <pshete@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Jacob Martin <jacob.martin@canonical.com>
Acked-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
This commit is contained in:
Rahul Bedarkar
2023-11-20 09:20:05 +00:00
committed by Noah Wager
parent a7ba9cec3b
commit 54ceaa5e6a
1 changed files with 9 additions and 2 deletions
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drivers/platform/tegra/tegra-epl.c
+9 -2
View File
@@ -75,6 +75,8 @@ static struct epl_misc_sw_err_cfg miscerr_cfg[NUM_SW_GENERIC_ERR];
/* State of FSI handshake */
static enum handshake_state hs_state = HANDSHAKE_PENDING;
static const int default_handshake_retry_count = 25;
static uint32_t handshake_retry_count;
static bool enable_deinit_notify;
@@ -230,7 +232,6 @@ static int epl_client_fsi_handshake(void *arg)
int ret;
const uint32_t handshake_data[] = {0x45504C48, 0x414E4453, 0x48414B45,
0x44415441};
const uint8_t max_retries = 20;
do {
ret = mbox_send_message(epl_hsp_v->tx.chan, (void *) handshake_data);
@@ -242,7 +243,7 @@ static int epl_client_fsi_handshake(void *arg)
hs_state = HANDSHAKE_DONE;
break;
}
} while (count < max_retries);
} while (count < handshake_retry_count);
}
if (hs_state == HANDSHAKE_FAILED)
@@ -367,6 +368,12 @@ static int epl_client_probe(struct platform_device *pdev)
if (of_property_read_bool(np, "enable-deinit-notify"))
enable_deinit_notify = true;
if (of_property_read_u32(np, "handshake-retry-count", &handshake_retry_count) < 0) {
handshake_retry_count = default_handshake_retry_count;
}
dev_info(dev, "handshake-retry-count %u\n", handshake_retry_count);
mission_err_status_va = devm_platform_ioremap_resource(pdev, NUM_SW_GENERIC_ERR * 2);
if (IS_ERR(mission_err_status_va)) {
isAddrMappOk = false;