From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 90F583BF303; Thu, 15 Jan 2026 17:14:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497272; cv=none; b=X6jsJfuRYndxZZ7DfOzU6W3AJ1BsK52vbegeANcpdV4yZyoAHrVPmw7h3rwJiXd4cOucTVnkSfUw6jedCSkUCw2UeQdNg8NyY5l+y2K05AFV3+V7dI9ae65VnIwrr8WVDMXZ8xLIWEGONjJY1F8cQJFfAERSQbgNcnstRDHu8Sg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768497272; c=relaxed/simple; bh=7TPGz3hvy/vQ1AZjhIShFKQB6N+7jI9le4Q1swbkV2c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oJdRHSbmmwWa+v0pbr4me6HXdtdwdOPCOECObgzcEwNsgn9rha7jzrzKPy6QmVg9A7G7FGM2mt6XQlBccBvxuKggjKkAMsX5xZlBKOWNdoGZ5ewt80gsNp2ukQiddGTan8pat59bmITY+dM/VIok85zjqa4rGKXrsojhbPGVBFs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=o+v/t4Xr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="o+v/t4Xr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C134C19422; Thu, 15 Jan 2026 17:14:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768497272; bh=7TPGz3hvy/vQ1AZjhIShFKQB6N+7jI9le4Q1swbkV2c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o+v/t4XrFA4lVhgpWdIvexOsttIVU5W0bT2UTEo1mJA961s6ALJsSLdIIY2u7gGB9 jD0rCfNb+3rXemjYfOdSzwVhKi5gbHNvazs35ggoKxHURTzd2BEirpxMX1mMLYCK3B HMKDSpBpmxDfeJI+DViEIFEmLj+rDaewiEV7TaQw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Carlos Song , Robin Gong , Mark Brown , Sasha Levin Subject: [PATCH 5.15 023/554] spi: imx: keep dma request disabled before dma transfer setup Date: Thu, 15 Jan 2026 17:41:29 +0100 Message-ID: <20260115164247.080105873@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Robin Gong [ Upstream commit 86d57d9c07d54e8cb385ffe800930816ccdba0c1 ] Since sdma hardware configure postpone to transfer phase, have to disable dma request before dma transfer setup because there is a hardware limitation on sdma event enable(ENBLn) as below: "It is thus essential for the Arm platform to program them before any DMA request is triggered to the SDMA, otherwise an unpredictable combination of channels may be started." Signed-off-by: Carlos Song Signed-off-by: Robin Gong Link: https://patch.msgid.link/20251024055320.408482-1-carlos.song@nxp.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-imx.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index f22b867b8c8a9..bcc31951a9925 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -498,9 +498,15 @@ static void mx51_ecspi_trigger(struct spi_imx_data *spi_imx) { u32 reg; - reg = readl(spi_imx->base + MX51_ECSPI_CTRL); - reg |= MX51_ECSPI_CTRL_XCH; - writel(reg, spi_imx->base + MX51_ECSPI_CTRL); + if (spi_imx->usedma) { + reg = readl(spi_imx->base + MX51_ECSPI_DMA); + reg |= MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN; + writel(reg, spi_imx->base + MX51_ECSPI_DMA); + } else { + reg = readl(spi_imx->base + MX51_ECSPI_CTRL); + reg |= MX51_ECSPI_CTRL_XCH; + writel(reg, spi_imx->base + MX51_ECSPI_CTRL); + } } static void mx51_disable_dma(struct spi_imx_data *spi_imx) @@ -665,7 +671,6 @@ static void mx51_setup_wml(struct spi_imx_data *spi_imx) writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) | 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); } @@ -1422,6 +1427,8 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, reinit_completion(&spi_imx->dma_tx_completion); dma_async_issue_pending(master->dma_tx); + spi_imx->devtype_data->trigger(spi_imx); + transfer_timeout = spi_imx_calculate_timeout(spi_imx, transfer->len); /* Wait SDMA to finish the data transfer.*/ -- 2.51.0