[PATCH 2/2] mmc: sdhci_am654: Add tuning debug prints

Judith Mendez
2024-08-15T21:08:33Z

Add debug prints to tuning algorithm for debugging.

Signed-off-by: Judith Mendez <jm@ti.com>
---
drivers/mmc/host/sdhci_am654.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index c3d485bd4d553..a909f8de0eabe 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -457,11 +457,13 @@ static u32 sdhci_am654_calculate_itap(struct sdhci_host *host, struct window

if (!num_fails) {
/* Retry tuning */
+ dev_err(dev, "No failing region found, retry tuning\n");
return -1;
}

if (fail_window->length == ITAPDLY_LENGTH) {
/* Retry tuning */
+ dev_err(dev, "No passing ITAPDLY, retry tuning\n");
return -1;
}

@@ -505,6 +507,7 @@ static int sdhci_am654_platform_execute_tuning(struct sdhci_host *host,
struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
unsigned char timing = host->mmc->ios.timing;
struct window fail_window[ITAPDLY_LENGTH];
+ struct device *dev = mmc_dev(host->mmc);
u8 curr_pass, itap;
u8 fail_index = 0;
u8 prev_pass = 1;
@@ -542,12 +545,14 @@ static int sdhci_am654_platform_execute_tuning(struct sdhci_host *host,

if (ret >= 0) {
itap = ret;
+ dev_dbg(dev, "Final ITAPDLY=%d\n", itap);
sdhci_am654_write_itapdly(sdhci_am654, itap, sdhci_am654->itap_del_ena[timing]);
} else {
if (sdhci_am654->tuning_loop < RETRY_TUNING_MAX) {
sdhci_am654->tuning_loop++;
sdhci_am654_platform_execute_tuning(host, opcode);
} else {
+ dev_err(dev, "Failed to find ITAPDLY, fail tuning\n");
return -1;
}
}
--
2.46.0