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Date: Mon, 22 Aug 2022 14:45:29 +0530 From: Vaishnav Achath <vaishnav.a@...com> To: <peter.ujfalusi@...il.com>, <vkoul@...nel.org>, <broonie@...nel.org>, <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org> CC: <vigneshr@...com>, <kishon@...com>, <vaishnav.a@...com> Subject: [PATCH 0/2] spi: spi-omap2-mcspi: Use EOW interrupt for transfer completion When using MCSPI with DMA enabled in Master/Slave mode, real-time performance issues were observed which were root caused to the uncertain delays in the TX completion calculation mechanism in k3-udma driver. This series updates the omap2-mcspi driver to use End of Word(EOW) interrupt to identify transaction completion and remove the usage of DMA rx_completion and tx_completion for identifying transaction completion. Tested on J721E SK (for both Master and Slave Mode) for Full Duplex, TX Only and RX Only mode transactions.Also tested with ILI9225 based SPI TFT Display. Vaishnav Achath (2): dmaengine: ti: k3-udma: Respond TX done if DMA_PREP_INTERRUPT is not requested spi: spi-omap2-mcspi: Use EOW interrupt for completion when DMA enabled drivers/dma/ti/k3-udma.c | 5 +- drivers/spi/spi-omap2-mcspi.c | 141 +++++++++------------------------- 2 files changed, 40 insertions(+), 106 deletions(-) -- 2.17.1
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