From: Lucas Stach <l.stach@pengutronix.de>
To: Robin Gong <yibin.gong@nxp.com>,
"broonie@kernel.org" <broonie@kernel.org>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"festevam@gmail.com" <festevam@gmail.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"u.kleine-koenig@pengutronix.de" <u.kleine-koenig@pengutronix.de>,
"plyatov@gmail.com" <plyatov@gmail.com>,
"dan.j.williams@intel.com" <dan.j.williams@intel.com>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"will.deacon@arm.com" <will.deacon@arm.com>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
"dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 06/15] spi: imx: fix ERR009165
Date: Fri, 26 Apr 2019 11:07:15 +0200 [thread overview]
Message-ID: <1556269635.2584.23.camel@pengutronix.de> (raw)
Message-ID: <20190426090715.DA3c96iKl3WjuTrEau864jVXggH5NiN1WDUohWC3a6k@z> (raw)
In-Reply-To: <1556265512-9130-7-git-send-email-yibin.gong@nxp.com>
Am Freitag, den 26.04.2019, 08:05 +0000 schrieb Robin Gong:
> Change to XCH mode even in dma mode, please refer to the below
> errata:
> https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
>
> Signed-off-by: Robin Gong <yibin.gong@nxp.com>
> ---
> drivers/spi/spi-imx.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
> index 09c9a1e..eb56eac 100644
> --- a/drivers/spi/spi-imx.c
> +++ b/drivers/spi/spi-imx.c
> @@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct
> spi_imx_data *spi_imx,
> ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
> spi_imx->spi_bus_clk = clk;
>
> + /* ERR009165: work in XHC mode as PIO */
> if (spi_imx->usedma)
> - ctrl |= MX51_ECSPI_CTRL_SMC;
> + ctrl &= ~MX51_ECSPI_CTRL_SMC;
>
> writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
>
> @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct
> spi_imx_data *spi_imx,
>
> static void mx51_setup_wml(struct spi_imx_data *spi_imx)
> {
> + u32 tx_wml = 0;
> +
With a wml of 0 you might set the maxburst of the TX dma channel to
fifosize to minimize the performance impact of this workaround.
Regards,
Lucas
> /*
> * Configure the DMA register: setup the watermark
> * and enable DMA request.
> */
> writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
> - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
> + MX51_ECSPI_DMA_TX_WML(tx_wml) |
> MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) |
> MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN |
> MX51_ECSPI_DMA_RXTDEN, spi_imx->base +
> MX51_ECSPI_DMA);
> @@ -1265,10 +1268,6 @@ static int spi_imx_sdma_init(struct device
> *dev, struct spi_imx_data *spi_imx,
> {
> int ret;
>
> - /* use pio mode for i.mx6dl chip TKT238285 */
> - if (of_machine_is_compatible("fsl,imx6dl"))
> - return 0;
> -
> spi_imx->wml = spi_imx->devtype_data->fifo_size / 2;
>
> /* Prepare for TX DMA: */
> --
> 2.7.4
>
next prev parent reply other threads:[~2019-04-26 9:07 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-26 8:05 [PATCH v2 00/15] add ecspi ERR009165 for i.mx6/7 soc family Robin Gong
2019-04-26 8:05 ` [v2,01/15] Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core" Robin Gong
2019-04-26 8:05 ` [PATCH v2 01/15] " Robin Gong
2019-04-26 8:05 ` [v2,02/15] Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores" Robin Gong
2019-04-26 8:05 ` [PATCH v2 02/15] " Robin Gong
2019-04-26 8:05 ` [v2,03/15] Revert "dmaengine: imx-sdma: refine to load context only once" Robin Gong
2019-04-26 8:05 ` [PATCH v2 03/15] " Robin Gong
2019-04-26 8:05 ` [v2,04/15] dmaengine: imx-sdma: remove dupilicated sdma_load_context Robin Gong
2019-04-26 8:05 ` [PATCH v2 04/15] " Robin Gong
2019-04-26 8:05 ` [v2,05/15] dmaengine: imx-sdma: add mcu_2_ecspi script Robin Gong
2019-04-26 8:05 ` [PATCH v2 05/15] " Robin Gong
2019-04-26 8:05 ` [v2,06/15] spi: imx: fix ERR009165 Robin Gong
2019-04-26 8:05 ` [PATCH v2 06/15] " Robin Gong
2019-04-26 9:07 ` Lucas Stach [this message]
2019-04-26 9:07 ` Lucas Stach
2019-04-26 9:22 ` [v2,06/15] " Robin Gong
2019-04-26 9:22 ` [EXT] Re: [PATCH v2 06/15] " Robin Gong
2019-04-26 9:37 ` [v2,06/15] " Lucas Stach
2019-04-26 9:37 ` [EXT] Re: [PATCH v2 06/15] " Lucas Stach
2019-04-26 9:53 ` [v2,06/15] " Robin Gong
2019-04-26 9:53 ` [EXT] Re: [PATCH v2 06/15] " Robin Gong
2019-04-26 8:05 ` [v2,07/15] spi: imx: remove ERR009165 workaround on i.mx6ul Robin Gong
2019-04-26 8:05 ` [PATCH v2 07/15] " Robin Gong
2019-04-26 9:09 ` [v2,07/15] " Lucas Stach
2019-04-26 9:09 ` [PATCH v2 07/15] " Lucas Stach
2019-04-26 9:32 ` [v2,07/15] " Robin Gong
2019-04-26 9:32 ` [EXT] Re: [PATCH v2 07/15] " Robin Gong
2019-04-26 8:05 ` [v2,08/15] dt-bindings: spi: imx: add i.mx6ul to state errata fixed Robin Gong
2019-04-26 8:05 ` [PATCH v2 08/15] " Robin Gong
2019-05-01 20:07 ` [v2,08/15] " Rob Herring
2019-05-01 20:07 ` [PATCH v2 08/15] " Rob Herring
2019-05-05 8:55 ` [EXT] " Robin Gong
2019-05-02 6:59 ` [v2,08/15] " Uwe Kleine-König
2019-05-02 6:59 ` [PATCH v2 08/15] " Uwe Kleine-König
2019-05-05 8:47 ` [EXT] " Robin Gong
2019-04-26 8:05 ` [v2,09/15] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul Robin Gong
2019-04-26 8:05 ` [PATCH v2 09/15] " Robin Gong
2019-04-26 8:06 ` [v2,10/15] dt-bindings: dma: imx-sdma: add i.mx6ul/6sx compatible name Robin Gong
2019-04-26 8:06 ` [PATCH v2 10/15] " Robin Gong
2019-05-01 20:07 ` [v2,10/15] " Rob Herring
2019-05-01 20:07 ` [PATCH v2 10/15] " Rob Herring
2019-04-26 8:06 ` [v2,11/15] dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm Robin Gong
2019-04-26 8:06 ` [PATCH v2 11/15] " Robin Gong
2019-04-26 8:06 ` [v2,12/15] ARM64: dts: freescale: imx8mm/8mq: update new compatible name for ecspi and sdma Robin Gong
2019-04-26 8:06 ` [PATCH v2 12/15] " Robin Gong
2019-04-26 8:06 ` [v2,13/15] ARM: dts: imx6ul: add dma support on ecspi Robin Gong
2019-04-26 8:06 ` [PATCH v2 13/15] " Robin Gong
2019-04-26 8:06 ` [v2,14/15] ARM: dts: imx6sll: correct ecspi/sdma compatible Robin Gong
2019-04-26 8:06 ` [PATCH v2 14/15] " Robin Gong
2019-04-26 8:06 ` [v2,15/15] arm64: defconfig: Enable SDMA on i.mx8mq/8mm Robin Gong
2019-04-26 8:06 ` [PATCH v2 15/15] " Robin Gong
2019-04-26 8:19 ` [PATCH v2 00/15] add ecspi ERR009165 for i.mx6/7 soc family Lucas Stach
2019-04-26 8:47 ` [EXT] " Robin Gong
2019-04-26 9:06 ` Lucas Stach
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