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* [PATCH] mmc: sdhci-msm: Remove NO_CARD_NO_RESET quirk
@ 2018-05-30 14:43 Georgi Djakov
  2018-05-31  5:55 ` Adrian Hunter
  2018-05-31 11:04 ` Ulf Hansson
  0 siblings, 2 replies; 3+ messages in thread
From: Georgi Djakov @ 2018-05-30 14:43 UTC (permalink / raw)
  To: ulf.hansson, adrian.hunter
  Cc: vviswana, riteshh, subhashj, stummala, asutoshd, bjorn.andersson,
	linux-mmc, linux-arm-msm, linux-kernel, Georgi Djakov

Now we have a proper implementation for the power irq handling and this
quirk is not needed anymore. In fact, it is causing card detection delays
on apq8096 platforms and the following error is displayed:
sdhci_msm 74a4900.sdhci: mmc0: pwr_irq for req: (4) timed out

The quirk is forcing the controller to retain 1.8V signalling on the slot
even when a new card is inserted, which is not correct. The proper behavior
would be to reset the controller in order to start with 3.3V signaling.

Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq")
Suggested-by: Vijay Viswanath <>
Signed-off-by: Georgi Djakov <>
This can go for v4.18, as it's not a critical fix.
Tested on db410c and db820c.
 drivers/mmc/host/sdhci-msm.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index c283291db705..791779173332 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1333,7 +1333,6 @@ static const struct sdhci_ops sdhci_msm_ops = {
 static const struct sdhci_pltfm_data sdhci_msm_pdata = {

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-05-31 11:04 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2018-05-30 14:43 [PATCH] mmc: sdhci-msm: Remove NO_CARD_NO_RESET quirk Georgi Djakov
2018-05-31  5:55 ` Adrian Hunter
2018-05-31 11:04 ` Ulf Hansson

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