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From: "Łukasz Stelmach" <l.stelmach@samsung.com>
To: Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	Andi Shyti <andi@etezian.org>, Mark Brown <broonie@kernel.org>,
	linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: m.szyprowski@samsung.com, b.zolnierkie@samsung.com,
	"Łukasz Stelmach" <l.stelmach@samsung.com>
Subject: [PATCH v2 RESEND 1/9] spi: spi-s3c64xx: swap s3c64xx_spi_set_cs() and s3c64xx_enable_datapath()
Date: Thu,  1 Oct 2020 17:21:40 +0200	[thread overview]
Message-ID: <20201001152148.29747-2-l.stelmach@samsung.com> (raw)
In-Reply-To: <20201001152148.29747-1-l.stelmach@samsung.com>

Fix issues with DMA transfers bigger than 512 bytes on Exynos3250. Without
the patches such transfers fail to complete. This solution to the problem
is found in the vendor kernel for ARTIK5 boards based on Exynos3250.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 924b24441789..26c7cb79cd78 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -685,11 +685,11 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
 		sdd->state &= ~RXBUSY;
 		sdd->state &= ~TXBUSY;
 
-		s3c64xx_enable_datapath(sdd, xfer, use_dma);
-
 		/* Start the signals */
 		s3c64xx_spi_set_cs(spi, true);
 
+		s3c64xx_enable_datapath(sdd, xfer, use_dma);
+
 		spin_unlock_irqrestore(&sdd->lock, flags);
 
 		if (use_dma)
-- 
2.26.2


  parent reply	other threads:[~2020-10-01 15:23 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20200821161404eucas1p20577160d1bff2e8f5cae7403e93716ab@eucas1p2.samsung.com>
2020-08-21 16:13 ` [PATCH v2 0/9] Some fixes for spi-s3c64xx Łukasz Stelmach
     [not found]   ` <CGME20200821161405eucas1p1d43a5970c6a26389cd506aab5f986bc8@eucas1p1.samsung.com>
2020-08-21 16:13     ` [PATCH v2 1/9] spi: spi-s3c64xx: swap s3c64xx_spi_set_cs() and s3c64xx_enable_datapath() Łukasz Stelmach
2020-08-22 12:01       ` Krzysztof Kozlowski
     [not found]   ` <CGME20200821161405eucas1p20aad659cd41bc4f56d5123d3c63394f0@eucas1p2.samsung.com>
2020-08-21 16:13     ` [PATCH v2 2/9] spi: spi-s3s64xx: Add S3C64XX_SPI_QUIRK_CS_AUTO for Exynos3250 Łukasz Stelmach
2020-08-22 12:02       ` Krzysztof Kozlowski
     [not found]   ` <CGME20200821161405eucas1p19280babcd73926b5c22a48830f5fecd7@eucas1p1.samsung.com>
2020-08-21 16:13     ` [PATCH v2 3/9] spi: spi-s3c64xx: Report more information when errors occur Łukasz Stelmach
2020-08-22 12:03       ` Krzysztof Kozlowski
     [not found]   ` <CGME20200821161406eucas1p2be3221183a855afd0213f8ce58bd8942@eucas1p2.samsung.com>
2020-08-21 16:13     ` [PATCH v2 4/9] spi: spi-s3c64xx: Rename S3C64XX_SPI_SLAVE_* to S3C64XX_SPI_CS_* Łukasz Stelmach
     [not found]   ` <CGME20200821161406eucas1p121553719d4e9cc020d2c557a69000f0c@eucas1p1.samsung.com>
2020-08-21 16:13     ` [PATCH v2 5/9] spi: spi-s3c64xx: Fix doc comment for struct s3c64xx_spi_driver_data Łukasz Stelmach
2020-08-22 12:26       ` Krzysztof Kozlowski
     [not found]   ` <CGME20200821161407eucas1p116af63a668bdbb75fa974589e5f6139f@eucas1p1.samsung.com>
2020-08-21 16:13     ` [PATCH v2 6/9] spi: spi-s3c64xx: Check return values Łukasz Stelmach
2020-08-22 12:37       ` Krzysztof Kozlowski
2020-08-25 19:06       ` Sylwester Nawrocki
     [not found]         ` <CGME20200901152113eucas1p2977046b7a5b4c5a519f88870d658698a@eucas1p2.samsung.com>
2020-09-01 15:21           ` Lukasz Stelmach
2020-09-02  8:14             ` Sylwester Nawrocki
     [not found]               ` <CGME20200903084555eucas1p2f40375edb325107b68966fd52198b220@eucas1p2.samsung.com>
2020-09-03  8:45                 ` Lukasz Stelmach
2020-09-03 11:18                   ` Sylwester Nawrocki
     [not found]   ` <CGME20200821161407eucas1p249e4833b8839f717cc2a496ab43bb8a2@eucas1p2.samsung.com>
2020-08-21 16:13     ` [PATCH v2 7/9] spi: spi-s3c64xx: Ensure cur_speed holds actual clock value Łukasz Stelmach
2020-08-22 12:43       ` Krzysztof Kozlowski
2020-08-22 14:52         ` Tomasz Figa
2020-08-22 15:18           ` Krzysztof Kozlowski
2020-08-22 15:20             ` Tomasz Figa
     [not found]         ` <CGME20200824131716eucas1p16a3fde52aa765e7cd6584d4733762047@eucas1p1.samsung.com>
2020-08-24 13:17           ` Lukasz Stelmach
2020-08-24 13:21             ` Tomasz Figa
     [not found]               ` <CGME20200825090211eucas1p1b63191fa778a775e33169ba2c1d3b74b@eucas1p1.samsung.com>
2020-08-25  9:01                 ` Lukasz Stelmach
2020-08-25 15:11                   ` Tomasz Figa
     [not found]                     ` <CGME20200825154611eucas1p284be8779ab484e675af071afef28376b@eucas1p2.samsung.com>
2020-08-25 15:45                       ` Lukasz Stelmach
2020-08-22 14:54       ` Tomasz Figa
     [not found]   ` <CGME20200821161407eucas1p23a283ac117d4381e087e9bacec537665@eucas1p2.samsung.com>
2020-08-21 16:14     ` [PATCH v2 8/9] spi: spi-s3c64xx: Increase transfer timeout Łukasz Stelmach
2020-08-22 12:43       ` Krzysztof Kozlowski
     [not found]   ` <CGME20200821161408eucas1p196aa4b954b3d19ad1b89a48dbbe41fbc@eucas1p1.samsung.com>
2020-08-21 16:14     ` [PATCH v2 9/9] spi: spi-s3c64xx: Turn on interrupts upon resume Łukasz Stelmach
2020-08-22 12:44       ` Krzysztof Kozlowski
     [not found]   ` <CGME20201001152246eucas1p1ee289b8a85b707f7496355c081623796@eucas1p1.samsung.com>
2020-10-01 15:21     ` [PATCH v2 RESEND 0/9] Some fixes for spi-s3c64xx Łukasz Stelmach
     [not found]       ` <CGME20201001152246eucas1p1b4155ab4f06a39cc88f205b4a7cd47f9@eucas1p1.samsung.com>
2020-10-01 15:21         ` Łukasz Stelmach [this message]
     [not found]       ` <CGME20201001152246eucas1p2fb22ab55c276d76c4508142842c90ab8@eucas1p2.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 2/9] spi: spi-s3s64xx: Add S3C64XX_SPI_QUIRK_CS_AUTO for Exynos3250 Łukasz Stelmach
2020-10-01 19:04           ` Krzysztof Kozlowski
     [not found]             ` <CGME20201002101408eucas1p121c21cde5e644992078978d9bf1c5194@eucas1p1.samsung.com>
2020-10-02 10:13               ` Lukasz Stelmach
     [not found]       ` <CGME20201001152247eucas1p2b6b1cc61b9b175b0a621609cd58effbd@eucas1p2.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 3/9] spi: spi-s3c64xx: Check return values Łukasz Stelmach
     [not found]       ` <CGME20201001152247eucas1p2afff5b5b73f78d7c5111ac1c800e718a@eucas1p2.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 4/9] spi: spi-s3c64xx: Report more information when errors occur Łukasz Stelmach
     [not found]       ` <CGME20201001152248eucas1p10219600aaa0df6e030d2493b2aefbe92@eucas1p1.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 5/9] spi: spi-s3c64xx: Rename S3C64XX_SPI_SLAVE_* to S3C64XX_SPI_CS_* Łukasz Stelmach
     [not found]       ` <CGME20201001152248eucas1p12f71c21a5873b6360e4b38efebb50271@eucas1p1.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 6/9] spi: spi-s3c64xx: Fix doc comment for struct s3c64xx_spi_driver_data Łukasz Stelmach
     [not found]       ` <CGME20201001152248eucas1p132a63f588f62d902879322ebadd67173@eucas1p1.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 7/9] spi: spi-s3c64xx: Ensure cur_speed holds actual clock value Łukasz Stelmach
2020-10-01 19:12           ` Krzysztof Kozlowski
     [not found]       ` <CGME20201001152249eucas1p1c3bbe7b2a677affe4e1a1e4d469f94c8@eucas1p1.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 8/9] spi: spi-s3c64xx: Increase transfer timeout Łukasz Stelmach
     [not found]       ` <CGME20201001152249eucas1p165b78adf542a48b38b49cb5e00500e26@eucas1p1.samsung.com>
2020-10-01 15:21         ` [PATCH v2 RESEND 9/9] spi: spi-s3c64xx: Turn on interrupts upon resume Łukasz Stelmach
2020-10-01 16:13       ` [PATCH v2 RESEND 0/9] Some fixes for spi-s3c64xx Mark Brown
     [not found]         ` <CGME20201001182315eucas1p1b1fc9d5d0ea91db6e56e92d5cf2583e5@eucas1p1.samsung.com>
2020-10-01 18:23           ` Lukasz Stelmach
2020-10-01 19:02             ` Krzysztof Kozlowski
2020-10-01 19:43               ` Mark Brown
2020-10-02  6:18                 ` Krzysztof Kozlowski

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