linux-kernel - [PATCH V2 1/3] mmc: sdhci-msm: Enable host capabilities pertains to R1b response

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Date:   Mon, 20 Apr 2020 11:50:23 +0530
From:   Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     bjorn.andersson@...aro.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Veerabhadrarao Badiganti <vbadigan@...eaurora.org>,
        <stable@...r.kernel.org>, Andy Gross <agross@...nel.org>
Subject: [PATCH V2 1/3] mmc: sdhci-msm: Enable host capabilities pertains to R1b response

MSM sd host controller is capable of HW busy detection of device busy
signaling over DAT0 line. And it requires the R1B response for
commands that have this response associated with them.

So set the below two host capabilities for qcom SDHC.
	- MMC_CAP_WAIT_WHILE_BUSY
	- MMC_CAP_NEED_RSP_BUSY

Cc: <stable@...r.kernel.org> # v4.19+
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
---
 drivers/mmc/host/sdhci-msm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 09ff731..d826e9b 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -2087,6 +2087,9 @@ static int sdhci_msm_probe(struct platform_device *pdev)
 		goto clk_disable;
 	}
 
+	msm_host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
+	msm_host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY;
+
 	pm_runtime_get_noresume(&pdev->dev);
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
-- 
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