Hi Robin, Am Dienstag, den 07.05.2019, 09:15 +0000 schrieb Robin Gong: > 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/tree/imx/sdma This series is unfit for merging, as long as it depends on a SDMA RAM script that is known to break serial DMA. When can we expect to get a firmware version with the broken serial script removed out into the public? Regards, Lucas > 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. > > Robin Gong (14): > 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: 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 > dt-bindings: spi: imx: add new i.mx6ul compatible name > dmaengine: imx-sdma: remove ERR009165 on i.mx6ul > dt-bindings: dma: imx-sdma: add i.mx6ul/6sx compatible name > dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm > ARM: dts: imx6ul: add dma support on ecspi > ARM: dts: imx6sll: correct sdma compatible > arm64: defconfig: Enable SDMA on i.mx8mq/8mm > > .../devicetree/bindings/dma/fsl-imx-sdma.txt | 2 + > .../devicetree/bindings/spi/fsl-imx-cspi.txt | 1 + > arch/arm/boot/dts/imx6q.dtsi | 2 +- > arch/arm/boot/dts/imx6qdl.dtsi | 8 +-- > arch/arm/boot/dts/imx6sll.dtsi | 2 +- > arch/arm/boot/dts/imx6ul.dtsi | 8 +++ > arch/arm64/configs/defconfig | 3 + > drivers/dma/imx-sdma.c | 78 ++++++++++++++++------ > drivers/spi/spi-imx.c | 61 ++++++++++++++--- > include/linux/platform_data/dma-imx-sdma.h | 1 + > 10 files changed, 132 insertions(+), 34 deletions(-) > > -- > 2.7.4 >
