linux-kernel - [PATCH v8 2/5] mmc: core: Enable the MMC host software queue for the SD card

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Message-Id: <0dc2be36722232c07ad9bd61ca285ed1553fe3c9.1580894083.git.baolin.wang7@gmail.com>
Date:   Wed,  5 Feb 2020 20:50:29 +0800
From:   Baolin Wang <baolin.wang7@...il.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        asutoshd@...eaurora.org
Cc:     orsonzhai@...il.com, zhang.lyra@...il.com, arnd@...db.de,
        linus.walleij@...aro.org, baolin.wang@...aro.org,
        baolin.wang7@...il.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v8 2/5] mmc: core: Enable the MMC host software queue for the SD card

From: Baolin Wang <baolin.wang@...aro.org>

Enable the MMC host software queue for the SD card if the host controller
supports the MMC host software queue.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
Signed-off-by: Baolin Wang <baolin.wang7@...il.com>
---
 drivers/mmc/core/sd.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index fe914ff..76c7add 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -1082,6 +1082,16 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 		}
 	}
 
+	if (host->cqe_ops && !host->cqe_enabled) {
+		err = host->cqe_ops->cqe_enable(host, card);
+		if (!err) {
+			host->cqe_enabled = true;
+			host->hsq_enabled = true;
+			pr_info("%s: Host Software Queue enabled\n",
+				mmc_hostname(host));
+		}
+	}
+
 	if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
 	    host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
 		pr_err("%s: Host failed to negotiate down from 3.3V\n",
-- 
1.7.9.5