linux-kernel - [PATCH v2 2/2] dmaengine: ti: k3-udma: Add support for J722S CSI BCDMA

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Message-ID: <20241126125158.37744-2-vaishnav.a@ti.com>
Date: Tue, 26 Nov 2024 18:21:58 +0530
From: Vaishnav Achath <vaishnav.a@...com>
To: <peter.ujfalusi@...il.com>, <vkoul@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
        <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <u-kumar1@...com>, <j-choudhary@...com>,
        <vigneshr@...com>, <vaishnav.a@...com>
Subject: [PATCH v2 2/2] dmaengine: ti: k3-udma: Add support for J722S CSI BCDMA

J722S CSI BCDMA is similar to J721S2 CSI BCDMA but there are
slight integration differences like different PSIL thread
base ID which is handled in the driver. Add an entry
to support J722S CSIRX.

J722S TRM (11.2 Data Movement Subsystem):
https://www.ti.com/lit/zip/sprujb3

Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
---

V1->V2:
	* Add new compatible for J722S instead of modifying AM62A

V1: https://lore.kernel.org/all/20241125083914.2934815-2-vaishnav.a@ti.com/

CSI2RX capture test results on J722S EVM with 4 x IMX219:
https://gist.github.com/vaishnavachath/e2eaed62ee8f53428ee9b830aaa02cc3

 drivers/dma/ti/k3-udma.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index b3f27b3f9209..7ed1956b4642 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -4404,6 +4404,18 @@ static struct udma_match_data j721s2_bcdma_csi_data = {
 	.soc_data = &j721s2_bcdma_csi_soc_data,
 };
 
+static struct udma_match_data j722s_bcdma_csi_data = {
+	.type = DMA_TYPE_BCDMA,
+	.psil_base = 0x3100,
+	.enable_memcpy_support = false,
+	.burst_size = {
+		TI_SCI_RM_UDMAP_CHAN_BURST_SIZE_64_BYTES, /* Normal Channels */
+		0, /* No H Channels */
+		0, /* No UH Channels */
+	},
+	.soc_data = &j721s2_bcdma_csi_soc_data,
+};
+
 static const struct of_device_id udma_of_match[] = {
 	{
 		.compatible = "ti,am654-navss-main-udmap",
@@ -4435,6 +4447,10 @@ static const struct of_device_id udma_of_match[] = {
 		.compatible = "ti,j721s2-dmss-bcdma-csi",
 		.data = &j721s2_bcdma_csi_data,
 	},
+	{
+		.compatible = "ti,j722s-dmss-bcdma-csi",
+		.data = &j722s_bcdma_csi_data,
+	},
 	{ /* Sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, udma_of_match);
-- 
2.34.1