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Date: Tue, 31 Mar 2020 10:57:25 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Bitan Biswas <bbiswas@...dia.com>, Peter Geis <pgwipeout@...il.com>, Sowjanya Komatineni <skomatineni@...dia.com>, Ulf Hansson <ulf.hansson@...aro.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.4 005/155] mmc: sdhci-tegra: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY From: Ulf Hansson <ulf.hansson@...aro.org> [ Upstream commit d2f8bfa4bff5028bc40ed56b4497c32e05b0178f ] It has turned out that the sdhci-tegra controller requires the R1B response, for commands that has this response associated with them. So, converting from an R1B to an R1 response for a CMD6 for example, leads to problems with the HW busy detection support. Fix this by informing the mmc core about the requirement, via setting the host cap, MMC_CAP_NEED_RSP_BUSY. Reported-by: Bitan Biswas <bbiswas@...dia.com> Reported-by: Peter Geis <pgwipeout@...il.com> Suggested-by: Sowjanya Komatineni <skomatineni@...dia.com> Cc: <stable@...r.kernel.org> Tested-by: Sowjanya Komatineni <skomatineni@...dia.com> Tested-By: Peter Geis <pgwipeout@...il.com> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/mmc/host/sdhci-tegra.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -1552,6 +1552,9 @@ static int sdhci_tegra_probe(struct plat if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50) host->mmc->caps |= MMC_CAP_1_8V_DDR; + /* R1B responses is required to properly manage HW busy detection. */ + host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY; + tegra_sdhci_parse_dt(host); tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power",
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