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From: Michael Tretter <m.tretter@pengutronix.de>
To: Michael Graichen <michael.graichen@hotmail.com>
Cc: barebox@lists.infradead.org, m.tretter@pengutronix.de
Subject: [PATCH 1/2] mci: arasan: wait for data available only on read
Date: Wed, 19 May 2021 09:38:54 +0200	[thread overview]
Message-ID: <20210519073855.2748231-1-m.tretter@pengutronix.de> (raw)
In-Reply-To: <AM9P192MB0870DC1573A4088BB839A208AB2C9@AM9P192MB0870.EURP192.PROD.OUTLOOK.COM>

Only READ data transfers actually send a data available interrupt.
Therefore, check if the transfer is a read and wait for the data only in
this case.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
---

Hi Michael,

On Tue, 18 May 2021 08:09:47 +0000, Michael Graichen wrote:
> > This looks familiar. I have a similar patch that sets SDHCI_INT_DATA_AVAIL
> > only if the command is a READ, but I didn't yet have time to verify, that this
> > is the correct fix.
>
> Can you please send it to me?

Here you are. I am not sure, if the fix is correct. I also added another
patch to handle situations where data is NULL, but I am not entirely sure
about that one either.

Michael
---
 drivers/mci/arasan-sdhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mci/arasan-sdhci.c b/drivers/mci/arasan-sdhci.c
index 520bf30ff952..399966e8cf10 100644
--- a/drivers/mci/arasan-sdhci.c
+++ b/drivers/mci/arasan-sdhci.c
@@ -277,7 +277,7 @@ static int arasan_sdhci_send_cmd(struct mci_host *mci, struct mci_cmd *cmd,
 	sdhci_write32(&host->sdhci, SDHCI_INT_STATUS, ~0);
 
 	mask = SDHCI_INT_CMD_COMPLETE;
-	if (data)
+	if (data && data->flags == MMC_DATA_READ)
 		mask |= SDHCI_INT_DATA_AVAIL;
 
 	sdhci_set_cmd_xfer_mode(&host->sdhci, cmd, data, false, &command, &xfer);
-- 
2.29.2


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  reply	other threads:[~2021-05-19  7:40 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-03 10:07 [PATCH 1/1] Zynq: add support to chainload another barebox Michael Graichen
2021-05-05  8:15 ` Lucas Stach
2021-05-05  8:27   ` Ahmad Fatoum
2021-05-05  9:40   ` AW: " Michael Graichen
2021-05-17  8:23     ` Michael Tretter
2021-05-18  8:09       ` AW: " Michael Graichen
2021-05-19  7:38         ` Michael Tretter [this message]
2021-05-19  7:38           ` [PATCH 2/2] mci: arasan: configure data transfer only if we actually have data Michael Tretter
2021-05-25  7:17             ` Sascha Hauer
2021-05-25  7:16           ` [PATCH 1/2] mci: arasan: wait for data available only on read Sascha Hauer

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