[PATCH] dmaengine: ti: k3-udma: Prioritize CSI RX traffic as RT
From: Jai Luthra <hidden>
Date: 2024-08-27 12:43:55
Also in:
lkml
Subsystem:
dma generic offload engine subsystem, texas instruments dma drivers, the rest · Maintainers:
Vinod Koul, Peter Ujfalusi, Linus Torvalds
From: Vignesh Raghavendra <vigneshr@ti.com> Mark BCDMA CSI RX as real-time traffic using OrderID 8/15. This ensures CSI traffic takes dedicated RT path towards DDR ensuring proper priority when under competing system load. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Jai Luthra <redacted> --- drivers/dma/ti/k3-udma.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 406ee199c2ac..74cdb9ec07c3 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c@@ -135,6 +135,7 @@ struct udma_match_data { u32 statictr_z_mask; u8 burst_size[3]; struct udma_soc_data *soc_data; + u8 order_id; }; struct udma_soc_data {
@@ -2110,6 +2111,7 @@ static int udma_tisci_rx_channel_config(struct udma_chan *uc) static int bcdma_tisci_rx_channel_config(struct udma_chan *uc) { struct udma_dev *ud = uc->ud; + const struct udma_match_data *match_data = ud->match_data; struct udma_tisci_rm *tisci_rm = &ud->tisci_rm; const struct ti_sci_rm_udmap_ops *tisci_ops = tisci_rm->tisci_udmap_ops; struct udma_rchan *rchan = uc->rchan;
@@ -2120,6 +2122,11 @@ static int bcdma_tisci_rx_channel_config(struct udma_chan *uc) req_rx.nav_id = tisci_rm->tisci_dev_id; req_rx.index = rchan->id; + if (match_data->order_id) { + req_rx.valid_params |= TI_SCI_MSG_VALUE_RM_UDMAP_CH_ORDER_ID_VALID; + req_rx.rx_orderid = match_data->order_id; + } + ret = tisci_ops->rx_ch_cfg(tisci_rm->tisci, &req_rx); if (ret) dev_err(ud->dev, "rchan%d cfg failed %d\n", rchan->id, ret);
@@ -4332,6 +4339,7 @@ static struct udma_match_data am62a_bcdma_csirx_data = { 0, /* No UH Channels */ }, .soc_data = &am62a_dmss_csi_soc_data, + .order_id = 8, }; static struct udma_match_data am64_bcdma_data = {
@@ -4370,6 +4378,7 @@ static struct udma_match_data j721s2_bcdma_csi_data = { 0, /* No UH Channels */ }, .soc_data = &j721s2_bcdma_csi_soc_data, + .order_id = 15, }; static const struct of_device_id udma_of_match[] = { ---
base-commit: 6f923748057a4f6aa187e0d5b22990d633a48d12 change-id: 20240827-csi_rt-fc6bff701f81 Best regards, -- Jai Luthra [off-list ref]