From mboxrd@z Thu Jan 1 00:00:00 1970 From: Abhishek Sahu Subject: [PATCH v2 3/3] dmaengine: qcom: bam_dma: add command descriptor flag Date: Mon, 26 Jun 2017 18:19:29 +0530 Message-ID: <1498481369-29497-4-git-send-email-absahu@codeaurora.org> References: <1498481369-29497-1-git-send-email-absahu@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:52464 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752128AbdFZMt4 (ORCPT ); Mon, 26 Jun 2017 08:49:56 -0400 In-Reply-To: <1498481369-29497-1-git-send-email-absahu@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: andy.gross@linaro.org, david.brown@linaro.org, vinod.koul@intel.com, dan.j.williams@intel.com Cc: linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, Abhishek Sahu If DMA_PREP_CMD flag is passed in prep_slave_sg then peripheral driver has passed the data is in BAM command descriptor format and BAM driver should set CMD bit for each of the HW descriptors. Signed-off-by: Abhishek Sahu --- drivers/dma/qcom/bam_dma.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c index 03c4eb3..6d89fb6 100644 --- a/drivers/dma/qcom/bam_dma.c +++ b/drivers/dma/qcom/bam_dma.c @@ -65,6 +65,7 @@ struct bam_desc_hw { #define DESC_FLAG_EOT BIT(14) #define DESC_FLAG_EOB BIT(13) #define DESC_FLAG_NWD BIT(12) +#define DESC_FLAG_CMD BIT(11) struct bam_async_desc { struct virt_dma_desc vd; @@ -645,6 +646,9 @@ static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan, unsigned int curr_offset = 0; do { + if (flags & DMA_PREP_CMD) + desc->flags |= cpu_to_le16(DESC_FLAG_CMD); + desc->addr = cpu_to_le32(sg_dma_address(sg) + curr_offset); @@ -960,7 +964,7 @@ static void bam_start_dma(struct bam_chan *bchan) /* set any special flags on the last descriptor */ if (async_desc->num_desc == async_desc->xfer_len) - desc[async_desc->xfer_len - 1].flags = + desc[async_desc->xfer_len - 1].flags |= cpu_to_le16(async_desc->flags); else desc[async_desc->xfer_len - 1].flags |= -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation