[RFC 3/4] mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable.

Ritesh Harjani
2017-08-30T13:04:43Z

When CMDQ is halted the HW expects descriptor size to
be same which is using in CMDQ mode.
Thus adjust the desc_sz of sdhci accordingly.

Without this patch below command gives ADMA error
when CQE is enabled.
cat /sys/kernel/debug/mmc0/mmc0:0001/ext_csd

Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
---
drivers/mmc/host/sdhci-msm.c | 24 ++++++++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 346cdfb..baa3409 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1111,9 +1111,29 @@ static u32 sdhci_msm_cqe_irq(struct sdhci_host *host, u32 intmask)
return 0;
}

+void sdhci_msm_cqe_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->flags & SDHCI_USE_64_BIT_DMA)
+ host->desc_sz = 12;
+
+ sdhci_cqe_enable(mmc);
+}
+
+void sdhci_msm_cqe_disable(struct mmc_host *mmc, bool recovery)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->flags & SDHCI_USE_64_BIT_DMA)
+ host->desc_sz = 16;
+
+ sdhci_cqe_disable(mmc, recovery);
+}
+
static const struct cqhci_host_ops sdhci_msm_cqhci_ops = {
- .enable = sdhci_cqe_enable,
- .disable = sdhci_cqe_disable,
+ .enable = sdhci_msm_cqe_enable,
+ .disable = sdhci_msm_cqe_disable,
};

#ifdef CONFIG_MMC_CQHCI
--
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