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Date: Wed, 15 Apr 2020 08:41:17 +0000
From: Robin Gong <yibin.gong@....com>
To: Robin Gong <yibin.gong@....com>,
"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
"vkoul@...nel.org" <vkoul@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
"broonie@...nel.org" <broonie@...nel.org>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"festevam@...il.com" <festevam@...il.com>,
"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
"mark.rutland@....com" <mark.rutland@....com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"will.deacon@....com" <will.deacon@....com>,
"l.stach@...gutronix.de" <l.stach@...gutronix.de>,
"martin.fuzzey@...wbird.group" <martin.fuzzey@...wbird.group>
CC: "kernel@...gutronix.de" <kernel@...gutronix.de>,
"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
dl-linux-imx <linux-imx@....com>,
"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH v7 00/13] add ecspi ERR009165 for i.mx6/7 soc family
Ping....
On 2020/03/11 16:35 Robin Gong <yibin.gong@....com> wrote:
> There is ecspi ERR009165 on i.mx6/7 soc family, which cause FIFO transfer to
> be send twice in DMA mode. Please get more information from:
> https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf. The workaround is
> adding new sdma ram script which works in XCH mode as PIO inside sdma
> instead of SMC mode, meanwhile, 'TX_THRESHOLD' should be 0. The issue
> should be exist on all legacy i.mx6/7 soc family before i.mx6ul.
> NXP fix this design issue from i.mx6ul, so newer chips including i.mx6ul/
> 6ull/6sll do not need this workaroud anymore. All other i.mx6/7/8 chips still
> need this workaroud. This patch set add new 'fsl,imx6ul-ecspi'
> for ecspi driver and 'ecspi_fixed' in sdma driver to choose if need errata or not.
> The first two reverted patches should be the same issue, though, it seems
> 'fixed' by changing to other shp script. Hope Sean or Sascha could have the
> chance to test this patch set if could fix their issues.
> Besides, enable sdma support for i.mx8mm/8mq and fix ecspi1 not work on
> i.mx8mm because the event id is zero.
>
> PS:
> Please get sdma firmware from below linux-firmware and copy it to your
> local rootfs /lib/firmware/imx/sdma.
> https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tr
> ee/imx/sdma
>
> v2:
> 1.Add commit log for reverted patches.
> 2.Add comment for 'ecspi_fixed' in sdma driver.
> 3.Add 'fsl,imx6sll-ecspi' compatible instead of 'fsl,imx6ul-ecspi'
> rather than remove.
> v3:
> 1.Confirm with design team make sure ERR009165 fixed on i.mx6ul/i.mx6ull
> /i.mx6sll, not fixed on i.mx8m/8mm and other i.mx6/7 legacy chips.
> Correct dts related dts patch in v2.
> 2.Clean eratta information in binding doc and new 'tx_glitch_fixed' flag
> in spi-imx driver to state ERR009165 fixed or not.
> 3.Enlarge burst size to fifo size for tx since tx_wml set to 0 in the
> errata workaroud, thus improve performance as possible.
> v4:
> 1.Add Ack tag from Mark and Vinod
> 2.Remove checking 'event_id1' zero as 'event_id0'.
> v5:
> 1.Add the last patch for compatible with the current uart driver which
> using rom script, so both uart ram script and rom script supported
> in latest firmware, by default uart rom script used. UART driver
> will be broken without this patch.
> v6:
> 1.Resend after rebase the latest next branch.
> 2.Remove below No.13~No.15 patches of v5 because they were mergered.
> ARM: dts: imx6ul: add dma support on ecspi
> ARM: dts: imx6sll: correct sdma compatible
> arm64: defconfig: Enable SDMA on i.mx8mq/8mm
> 3.Revert "dmaengine: imx-sdma: fix context cache" since
> 'context_loaded' removed.
> v7:
> 1.Put the last patch 13/13 'Revert "dmaengine: imx-sdma: fix context
> cache"' to the ahead of 03/13 'Revert "dmaengine: imx-sdma: refine
> to load context only once" so that no building waring during comes out
> during bisect.
> 2.Address Sascha's comments, including eliminating any i.mx6sx in this
> series, adding new 'is_imx6ul_ecspi()' instead imx in imx51 and taking
> care SMC bit for PIO.
> 3.Add back missing 'Reviewed-by' tag on 08/15(v5):09/13(v7)
> 'spi: imx: add new i.mx6ul compatible name in binding doc'
>
> Robin Gong (13):
> Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"
> Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores"
> Revert "dmaengine: imx-sdma: fix context cache"
> Revert "dmaengine: imx-sdma: refine to load context only once"
> dmaengine: imx-sdma: remove dupilicated sdma_load_context
> dmaengine: imx-sdma: add mcu_2_ecspi script
> spi: imx: fix ERR009165
> spi: imx: remove ERR009165 workaround on i.mx6ul
> spi: imx: add new i.mx6ul compatible name in binding doc
> dmaengine: imx-sdma: remove ERR009165 on i.mx6ul
> dma: imx-sdma: add i.mx6ul compatible name
> dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm
> dmaengine: imx-sdma: add uart rom script
>
> .../devicetree/bindings/dma/fsl-imx-sdma.txt | 1 +
> .../devicetree/bindings/spi/fsl-imx-cspi.txt | 1 +
> arch/arm/boot/dts/imx6q.dtsi | 2 +-
> arch/arm/boot/dts/imx6qdl.dtsi | 8 +--
> drivers/dma/imx-sdma.c | 67
> ++++++++++++++--------
> drivers/spi/spi-imx.c | 61
> +++++++++++++++++---
> include/linux/platform_data/dma-imx-sdma.h | 8 ++-
> 7 files changed, 108 insertions(+), 40 deletions(-)
>
> --
> 2.7.4
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