Commit 055e0483 authored Mar 10, 2020 by Ulf Hansson

mmc: sdhci-omap: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY



It has turned out that the sdhci-omap 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: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Reported-by: Faiz Abbas <faiz_abbas@ti.com>
Cc: <stable@vger.kernel.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 43cc64e5

drivers/mmc/host/sdhci-omap.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1192,6 +1192,9 @@ static int sdhci_omap_probe(struct platform_device *pdev)
		if (of_find_property(dev->of_node, "dmas", NULL))
		sdhci_switch_external_dma(host, true);

		/* R1B responses is required to properly manage HW busy detection. */
		mmc->caps \|= MMC_CAP_NEED_RSP_BUSY;

		ret = sdhci_setup_host(host);
		if (ret)
		goto err_put_sync;

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