Add debug prints to tuning algorithm for debugging.
Also add error print if we fail tuning.
Signed-off-by: Judith Mendez <jm@xxxxxx>
---
Changes since v2:
- Move struct *dev = mmc_dev() to patch 2/2
---
drivers/mmc/host/sdhci_am654.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index 13da003363e1d..0aa3c40ea6ed8 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -457,11 +457,13 @@ static int sdhci_am654_calculate_itap(struct sdhci_host *host, struct window
if (!num_fails) {
/* Retry tuning */
+ dev_dbg(dev, "No failing region found, retry tuning\n");
return -1;
}
if (fail_window->length == ITAPDLY_LENGTH) {
/* Retry tuning */
+ dev_dbg(dev, "No passing itapdly, retry tuning\n");
return -1;
}
@@ -505,6 +507,7 @@ static int sdhci_am654_do_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;
@@ -525,6 +528,7 @@ static int sdhci_am654_do_tuning(struct sdhci_host *host,
if (!curr_pass) {
fail_window[fail_index].end = itap;
fail_window[fail_index].length++;
+ dev_dbg(dev, "Failed itapdly=%d\n", itap);
}
if (curr_pass && !prev_pass)
@@ -546,6 +550,7 @@ static int sdhci_am654_platform_execute_tuning(struct sdhci_host *host,
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_am654_data *sdhci_am654 = sdhci_pltfm_priv(pltfm_host);
unsigned char timing = host->mmc->ios.timing;
+ struct device *dev = mmc_dev(host->mmc);
int itapdly;
do {
@@ -554,9 +559,12 @@ static int sdhci_am654_platform_execute_tuning(struct sdhci_host *host,
break;
} while (++sdhci_am654->tuning_loop < RETRY_TUNING_MAX);
- if (itapdly < 0)
+ if (itapdly < 0) {
+ dev_err(dev, "Failed to find itapdly, fail tuning\n");
return -1;
+ }
+ dev_dbg(dev, "Passed tuning, final itapdly=%d\n", itapdly);
sdhci_am654_write_itapdly(sdhci_am654, itapdly, sdhci_am654->itap_del_ena[timing]);
/* Save ITAPDLY */
sdhci_am654->itap_del_sel[timing] = itapdly;
--
2.46.0
