Message ID | 1591392755-19136-7-git-send-email-yibin.gong@nxp.com (mailing list archive) |
---|---|
State | Not Applicable |
Headers | show
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Fri, 5 Jun 2020 13:33:00 +0000 From: Robin Gong <yibin.gong@nxp.com> To: mark.rutland@arm.com, broonie@kernel.org, robh+dt@kernel.org, catalin.marinas@arm.com, vkoul@kernel.org, will.deacon@arm.com, shawnguo@kernel.org, festevam@gmail.com, s.hauer@pengutronix.de, martin.fuzzey@flowbird.group, u.kleine-koenig@pengutronix.de, dan.j.williams@intel.com, matthias.schiffer@ew.tq-group.com Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, linux-imx@nxp.com, dmaengine@vger.kernel.org Subject: [PATCH v9 06/14] spi: imx: add dma_sync_sg_for_device after fallback from dma Date: Sat, 6 Jun 2020 05:32:27 +0800 Message-Id: <1591392755-19136-7-git-send-email-yibin.gong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1591392755-19136-1-git-send-email-yibin.gong@nxp.com> References: <1591392755-19136-1-git-send-email-yibin.gong@nxp.com> Content-Type: text/plain X-ClientProxiedBy: SG2PR02CA0048.apcprd02.prod.outlook.com (2603:1096:3:18::36) To VE1PR04MB6638.eurprd04.prod.outlook.com (2603:10a6:803:119::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from robin-OptiPlex-790.ap.freescale.net (119.31.174.66) by SG2PR02CA0048.apcprd02.prod.outlook.com (2603:1096:3:18::36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3066.20 via Frontend Transport; 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add ecspi ERR009165 for i.mx6/7 soc family
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expand
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diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index b7a85e3..c51cd3a 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1456,6 +1456,13 @@ static int spi_imx_pio_transfer(struct spi_device *spi, return -ETIMEDOUT; } + if (transfer->rx_sg.sgl) { + struct device *rx_dev = spi->controller->dma_rx->device->dev; + + dma_sync_sg_for_device(rx_dev, transfer->rx_sg.sgl, + transfer->rx_sg.nents, DMA_TO_DEVICE); + } + return transfer->len; } @@ -1521,10 +1528,15 @@ static int spi_imx_transfer(struct spi_device *spi, * firmware may not be updated as ERR009165 required. */ if (spi_imx->usedma) { + struct device *tx_dev = spi->controller->dma_tx->device->dev; + ret = spi_imx_dma_transfer(spi_imx, transfer); if (ret != -EINVAL) return ret; + dma_sync_sg_for_cpu(tx_dev, transfer->tx_sg.sgl, + transfer->tx_sg.nents, DMA_FROM_DEVICE); + spi_imx->devtype_data->disable_dma(spi_imx); spi_imx->usedma = false;
In case dma transfer failed and fallback to pio, tx_buf/rx_buf need to be taken care cache since they have already been maintained by spi.c Fixes: bcd8e7761ec9("spi: imx: fallback to PIO if dma setup failure") Signed-off-by: Robin Gong <yibin.gong@nxp.com> Reported-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com> Link: https://lore.kernel.org/linux-arm-kernel/5d246dd81607bb6e5cb9af86ad4e53f7a7a99c50.camel@ew.tq-group.com/ --- drivers/spi/spi-imx.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)