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mmc: host: sdhci-sprd: Implement the request_atomic() API 

Implement the request_atomic() API for nonremovable cards, that means
we can submit next request in the irq hard handler context to reduce
latency.

Moreover factor out the AUTO CMD23 checking into a separate function
to reduce duplicate code.

Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/60142fe6c6c1dbba2696e775564ae2166786f0bc.1586744073.git.baolin.wang7@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Baolin Wang 2020-04-13 10:46:05 +08:00 committed by Ulf Hansson
parent 48ef8a2a1e
commit 61ab64e2f5
1 changed files with 20 additions and 3 deletions
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23
drivers/mmc/host/sdhci-sprd.c
View File

@ -406,7 +406,8 @@ static struct sdhci_ops sdhci_sprd_ops = {
.request_done = sdhci_sprd_request_done,
};
static void sdhci_sprd_request(struct mmc_host *mmc, struct mmc_request *mrq)
static void sdhci_sprd_check_auto_cmd23(struct mmc_host *mmc,
struct mmc_request *mrq)
{
struct sdhci_host *host = mmc_priv(mmc);
struct sdhci_sprd_host *sprd_host = TO_SPRD_HOST(host);
@ -422,10 +423,23 @@ static void sdhci_sprd_request(struct mmc_host *mmc, struct mmc_request *mrq)
mrq->sbc && (mrq->sbc->arg & SDHCI_SPRD_ARG2_STUFF) &&
(host->flags & SDHCI_AUTO_CMD23))
host->flags &= ~SDHCI_AUTO_CMD23;
}
static void sdhci_sprd_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
sdhci_sprd_check_auto_cmd23(mmc, mrq);
sdhci_request(mmc, mrq);
}
static int sdhci_sprd_request_atomic(struct mmc_host *mmc,
struct mmc_request *mrq)
{
sdhci_sprd_check_auto_cmd23(mmc, mrq);
return sdhci_request_atomic(mmc, mrq);
}
static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct sdhci_host *host = mmc_priv(mmc);
@ -562,6 +576,11 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
if (ret)
goto pltfm_free;
if (!mmc_card_is_removable(host->mmc))
host->mmc_host_ops.request_atomic = sdhci_sprd_request_atomic;
else
host->always_defer_done = true;
sprd_host = TO_SPRD_HOST(host);
sdhci_sprd_phy_param_parse(sprd_host, pdev->dev.of_node);
@ -655,8 +674,6 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
if (ret)
goto err_cleanup_host;
host->always_defer_done = true;
ret = __sdhci_add_host(host);
if (ret)
goto err_cleanup_host;