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authorVeerabhadrarao Badiganti <vbadigan@codeaurora.org>2020-03-06 15:08:43 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2020-03-24 14:39:52 +0100
commit5cf583f1fb9c5ca8862c8a1c688874dc85e594f5 (patch)
tree3e223edfa04ec6950bcc1df84f88a37f2fc377b9 /drivers/mmc
parentmmc: cqhci: Add cqhci_deactivate() (diff)
downloadlinux-5cf583f1fb9c5ca8862c8a1c688874dc85e594f5.tar.xz
linux-5cf583f1fb9c5ca8862c8a1c688874dc85e594f5.zip
mmc: sdhci-msm: Deactivate CQE during SDHC reset
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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-msm.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 53b79ee37fdd..09ff7315eb5e 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -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,