linux-kernel - [PATCH V2 06/10] mmc: cqhci: allow hosts to specify dcmd cmd timing parameter

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Date:   Mon, 11 Mar 2019 11:02:35 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <adrian.hunter@...el.com>, <ulf.hansson@...aro.org>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <riteshh@...eaurora.org>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <anrao@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH V2 06/10] mmc: cqhci: allow hosts to specify dcmd cmd timing parameter

This patch adds get_dcmd_cmd_timing interface to cqhci_host_ops to
allow hosts to specify CMD_TIMING bit of the DCMD task descriptor
command parameter.

This helps host driver to control whether the command can be issued
during data transfer or only during idle time.

Tested-by: Jon Hunter <jonathanh@...dia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/mmc/host/cqhci.c | 2 ++
 drivers/mmc/host/cqhci.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c
index a8af682a9182..9a02f9c82aeb 100644
--- a/drivers/mmc/host/cqhci.c
+++ b/drivers/mmc/host/cqhci.c
@@ -528,6 +528,8 @@ static void cqhci_prep_dcmd_desc(struct mmc_host *mmc,
 		}
 	}
 
+	if (cq_host->ops->get_dcmd_cmd_timing)
+		timing = cq_host->ops->get_dcmd_cmd_timing(mmc, mrq);
 	task_desc = (__le64 __force *)get_desc(cq_host, cq_host->dcmd_slot);
 	memset(task_desc, 0, cq_host->task_desc_len);
 	data |= (CQHCI_VALID(1) |
diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
index 9e68286a07b4..981158da3326 100644
--- a/drivers/mmc/host/cqhci.h
+++ b/drivers/mmc/host/cqhci.h
@@ -210,6 +210,8 @@ struct cqhci_host_ops {
 	u32 (*read_l)(struct cqhci_host *host, int reg);
 	void (*enable)(struct mmc_host *mmc);
 	void (*disable)(struct mmc_host *mmc, bool recovery);
+	u8 (*get_dcmd_cmd_timing)(struct mmc_host *mmc,
+				  struct mmc_request *mrq);
 };
 
 static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg)
-- 
2.7.4