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mmc: sdhci: Add a quirk for broken command queuing

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commit 75d27ea1abf7af3cc2cdec3513e74f52191605c8 upstream.

Command queuing has been reported broken on some systems based on Intel
GLK. A separate patch disables command queuing in some cases.

This patch adds a quirk for broken command queuing, which enables users
with problems to disable command queuing using sdhci module parameters for
quirks.

Fixes: 8ee82bda23 ("mmc: sdhci-pci: Add CQHCI support for Intel GLK")
Signed-off-by: Adrian Hunter <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Adrian Hunter 2019-12-17 11:53:49 +02:00 • committed by Greg Kroah-Hartman
commit 10448fb579
2 changed files with 5 additions and 0 deletions
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3
drivers/mmc/host/sdhci.c
View file

@ -3756,6 +3756,9 @@ int sdhci_setup_host(struct sdhci_host *host)
mmc_hostname(mmc), host->version);
}
if (host->quirks & SDHCI_QUIRK_BROKEN_CQE)
mmc->caps2 &= ~MMC_CAP2_CQE;
if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
host->flags |= SDHCI_USE_SDMA;
else if (!(host->caps & SDHCI_CAN_DO_SDMA))

2
drivers/mmc/host/sdhci.h
View file

@ -409,6 +409,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15)
/* Controller reports inverted write-protect state */
#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16)
/* Controller has unusable command queue engine */
#define SDHCI_QUIRK_BROKEN_CQE (1<<17)
/* Controller does not like fast PIO transfers */
#define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18)
/* Controller does not have a LED */