From acc13958c2b2623c17e2450b8cd6881b698756d3 Mon Sep 17 00:00:00 2001 From: Prathamesh Shete Date: Tue, 6 Dec 2022 17:59:45 +0100 Subject: mmc: sdhci-tegra: Issue CMD and DAT resets together In case of error condition to avoid system crash Tegra SDMMC controller requires CMD and DAT resets issued together. SDHCI controller FSM goes into bad state due to rapid SD card hot-plug event. Issuing reset on the CMD FSM before DATA FSM results in kernel panic, hence add support to issue CMD and DAT resets together. This is applicable to Tegra186 and later chips. Signed-off-by: Aniruddha TVS Rao Signed-off-by: Prathamesh Shete Acked-by: Adrian Hunter Acked-by: Thierry Reding Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20221206165945.3551774-7-thierry.reding@gmail.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/mmc/host/sdhci.c') diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index edf052ccb176..f3af1bd0f7b9 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -270,6 +270,11 @@ enum sdhci_reset_reason { static void sdhci_reset_for_reason(struct sdhci_host *host, enum sdhci_reset_reason reason) { + if (host->quirks2 & SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER) { + sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + return; + } + switch (reason) { case SDHCI_RESET_FOR_INIT: sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); -- cgit