[PATCH v3 5/5] dmaengine: ti: k3-udma: Add support for BCDMA CSI RX

Vignesh Raghavendra
2022-12-13T16:43:59Z

BCDMA CSI RX present on AM62Ax SoC is a dedicated DMA for servicing
Camera Serial Interface (CSI) IP. Add support for the same.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
drivers/dma/ti/k3-udma.c | 37 ++++++++++++++++++++++++++++++++-----
1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index c1005d17b42e..1d3d1b387b96 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -135,6 +135,7 @@ struct udma_match_data {
u32 flags;
u32 statictr_z_mask;
u8 burst_size[3];
+ struct udma_soc_data *soc_data;
};

struct udma_soc_data {
@@ -4295,6 +4296,25 @@ static struct udma_match_data j721e_mcu_data = {
},
};

+static struct udma_soc_data am62a_dmss_csi_soc_data = {
+ .oes = {
+ .bcdma_rchan_data = 0xe00,
+ .bcdma_rchan_ring = 0x1000,
+ },
+};
+
+static struct udma_match_data am62a_bcdma_csirx_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 = &am62a_dmss_csi_soc_data,
+};
+
static struct udma_match_data am64_bcdma_data = {
.type = DMA_TYPE_BCDMA,
.psil_base = 0x2000, /* for tchan and rchan, not applicable to bchan */
@@ -4344,6 +4364,10 @@ static const struct of_device_id udma_of_match[] = {
.compatible = "ti,am64-dmss-pktdma",
.data = &am64_pktdma_data,
},
+ {
+ .compatible = "ti,am62a-dmss-bcdma-csirx",
+ .data = &am62a_bcdma_csirx_data,
+ },
{ /* Sentinel */ },
};

@@ -5274,12 +5298,15 @@ static int udma_probe(struct platform_device *pdev)
}
ud->match_data = match->data;

- soc = soc_device_match(k3_soc_devices);
- if (!soc) {
- dev_err(dev, "No compatible SoC found\n");
- return -ENODEV;
+ ud->soc_data = ud->match_data->soc_data;
+ if (!ud->soc_data) {
+ soc = soc_device_match(k3_soc_devices);
+ if (!soc) {
+ dev_err(dev, "No compatible SoC found\n");
+ return -ENODEV;
+ }
+ ud->soc_data = soc->data;
}
- ud->soc_data = soc->data;

ret = udma_get_mmrs(pdev, ud);
if (ret)
--
2.38.1