linux-kernel - [PATCH v3 3/5] dmaengine: imx-sdma: Add multi fifo for DEV_TO

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Message-Id: <20240318-sdma_upstream-v3-3-da37ddd44d49@nxp.com>
Date: Mon, 18 Mar 2024 16:44:36 -0400
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>, 
 Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Joy Zou <joy.zou@....com>
Cc: dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, Frank Li <Frank.Li@....com>, 
 Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH v3 3/5] dmaengine: imx-sdma: Add multi fifo for DEV_TO_DEV

From: Joy Zou <joy.zou@....com>

Support multi fifo for DEV_TO_DEV.

Signed-off-by: Joy Zou <joy.zou@....com>
Reviewed-by: Joy Zou <joy.zou@....com>
Reviewed-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/dma/imx-sdma.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 6be4c1e441266..35fb69a84a8da 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -169,6 +169,8 @@
 #define SDMA_WATERMARK_LEVEL_SPDIF	BIT(10)
 #define SDMA_WATERMARK_LEVEL_SP		BIT(11)
 #define SDMA_WATERMARK_LEVEL_DP		BIT(12)
+#define SDMA_WATERMARK_LEVEL_SD		BIT(13)
+#define SDMA_WATERMARK_LEVEL_DD		BIT(14)
 #define SDMA_WATERMARK_LEVEL_HWML	(0xFF << 16)
 #define SDMA_WATERMARK_LEVEL_LWE	BIT(28)
 #define SDMA_WATERMARK_LEVEL_HWE	BIT(29)
@@ -1258,6 +1260,11 @@ static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac)
 		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DP;
 
 	sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_CONT;
+
+	if (sdmac->n_fifos_src > 1)
+		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_SD;
+	if (sdmac->n_fifos_dst > 1)
+		sdmac->watermark_level |= SDMA_WATERMARK_LEVEL_DD;
 }
 
 static void sdma_set_watermarklevel_for_sais(struct sdma_channel *sdmac)

-- 
2.34.1