Hi Adrian,
Thanks for reviewing.
On 1/19/2017 5:24 PM, Adrian Hunter wrote:
On 10/01/17 08:41, Ritesh Harjani wrote:
print error log message and dump sdhc registers for debugging
purpose in case of data errors (except when tuning commands
generate CRC/timeout/end bit errors).
It is a bit ugly and probably only useful during driver development, so I am
not at all enthusiastic about this.
Ok, since this patch was anyway for debugging, I will drop this patch
for now. I will revisit in case if the need really arises, since this
could be useful in debugging data txfr error and avoid re-test cycle to
get sdhci register dumps.
Also,
Do you think we should have this below change added? Could you please
give your thoughts on this. Jeremy and I feel that even below info can
be helpful along with sdhci_dumpregs -
He requested me to take below diff as another patch in my next revision
of this series which he has submitted here -
https://patchwork.kernel.org/patch/9442449/
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 71654b9..5911f98 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -47,6 +47,27 @@ static void sdhci_finish_data(struct sdhci_host *);
static void sdhci_enable_preset_value(struct sdhci_host *host, bool
enable);
+static void sdhci_dump_rpm_info(struct sdhci_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+
+ pr_info("%s:
rpmstatus[pltfm](runtime-suspend:usage_count:disable_depth)(%d:%d:%d)\n",
+ mmc_hostname(mmc), mmc->parent->power.runtime_status,
+ atomic_read(&mmc->parent->power.usage_count),
+ mmc->parent->power.disable_depth);
+}
+
+
+static void sdhci_dump_state(struct sdhci_host *host)
+{
+ struct mmc_host *mmc = host->mmc;
+
+ pr_info("%s: clk: %d claimer: %s pwr: %d\n",
+ mmc_hostname(mmc), host->clock,
+ mmc->claimer->comm, host->pwr);
+ sdhci_dump_rpm_info(host);
+}
+
static void sdhci_dumpregs(struct sdhci_host *host)
{
pr_err(DRIVER_NAME ": =========== REGISTER DUMP (%s)===========\n",
@@ -100,6 +121,10 @@ static void sdhci_dumpregs(struct sdhci_host *host)
readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
}
+ if (host->ops->dump_vendor_regs)
+ host->ops->dump_vendor_regs(host);
+
+ sdhci_dump_state(host);
pr_err(DRIVER_NAME ": ===========================================\n");
}
Regards
Ritesh
Signed-off-by: Ritesh Harjani <riteshh@xxxxxxxxxxxxxx>
Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 73a8918..2e51e49 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2616,9 +2616,26 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
host->ops->adma_workaround(host, intmask);
}
- if (host->data->error)
+ if (host->data->error) {
+ bool pr_msg = true;
+
+ if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT |
+ SDHCI_INT_DATA_END_BIT)) {
+ command = SDHCI_GET_CMD(sdhci_readw(host,
+ SDHCI_COMMAND));
+ if (command == MMC_SEND_TUNING_BLOCK_HS200 ||
+ command == MMC_SEND_TUNING_BLOCK)
+ pr_msg = false;
+ }
+ if (pr_msg) {
+ pr_err("%s: data txfr (0x%08x) error: %d\n",
+ mmc_hostname(host->mmc), intmask,
+ host->data->error);
+ sdhci_dumpregs(host);
+ }
+
sdhci_finish_data(host);
- else {
+ } else {
if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
sdhci_transfer_pio(host);
--
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