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mmc: sdhci_am654: Add prints to tuning algorithm

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Add debug prints to tuning algorithm for debugging.
Also add error print if we fail tuning.

Signed-off-by: Judith Mendez <jm@ti.com>
Link: https://lore.kernel.org/r/20240904232512.830778-3-jm@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Judith Mendez 2024-09-04 18:25:12 -05:00 committed by Ulf Hansson
parent 901d16e462
commit cf6444ba52
1 changed files with 10 additions and 1 deletions
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11
drivers/mmc/host/sdhci_am654.c
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@ -450,17 +450,20 @@ static int sdhci_am654_calculate_itap(struct sdhci_host *host, struct window
{
u8 itap = 0, start_fail = 0, end_fail = 0, pass_length = 0;
u8 first_fail_start = 0, last_fail_end = 0;
struct device *dev = mmc_dev(host->mmc);
struct window pass_window = {0, 0, 0};
int prev_fail_end = -1;
u8 i;
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;
}
@ -504,6 +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;
@ -524,6 +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)
@ -545,6 +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 {
@ -553,9 +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;