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mmc: sdhci-msm: Deactivate CQE during SDHC reset

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When SDHC gets reset (E.g. in runtime suspend path), CQE also gets
reset and goes to disable state. But s/w state still points it as CQE
is in enabled state. Since s/w and h/w states goes out of sync,
it results in s/w request timeout for subsequent CQE requests.

To synchronize CQE s/w and h/w state during SDHC reset,
explicitly deactivate CQE just before SDHC reset.

Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1583503724-13943-3-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Veerabhadrarao Badiganti 2020-03-06 19:38:43 +05:30 committed by Ulf Hansson
parent 0ffa6cfbd9
commit 5cf583f1fb
1 changed files with 8 additions and 1 deletions
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9
drivers/mmc/host/sdhci-msm.c
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@ -1823,6 +1823,13 @@ static void sdhci_msm_set_regulator_caps(struct sdhci_msm_host *msm_host)
pr_debug("%s: supported caps: 0x%08x\n", mmc_hostname(mmc), caps);
}
static void sdhci_msm_reset(struct sdhci_host *host, u8 mask)
{
if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL))
cqhci_deactivate(host->mmc);
sdhci_reset(host, mask);
}
static const struct sdhci_msm_variant_ops mci_var_ops = {
.msm_readl_relaxed = sdhci_msm_mci_variant_readl_relaxed,
.msm_writel_relaxed = sdhci_msm_mci_variant_writel_relaxed,
@ -1861,7 +1868,7 @@ static const struct of_device_id sdhci_msm_dt_match[] = {
MODULE_DEVICE_TABLE(of, sdhci_msm_dt_match);
static const struct sdhci_ops sdhci_msm_ops = {
.reset = sdhci_reset,
.reset = sdhci_msm_reset,
.set_clock = sdhci_msm_set_clock,
.get_min_clock = sdhci_msm_get_min_clock,
.get_max_clock = sdhci_msm_get_max_clock,