[PATCH 2/2] remoteproc: k3-dsp: Set a 48-bit DMA mask for remoteproc device

[Beleswar Padhi]

From: Rahul T R <r-ravikumar@xxxxxx>

The C6x DSP can address 48-bit memory space through the Region Address
Translator (RAT) unit, and the C7x DSP has a native 48-bit address bus.
RAT is usually programmed by the firmware itself. Configure the
remoteproc device DMA mask to 48 bits to enable full addressing
capability for DMA operations.

Signed-off-by: Rahul T R <r-ravikumar@xxxxxx>
Signed-off-by: Beleswar Padhi <b-padhi@xxxxxx>
---
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index d6ceea6dc920e..c0ccf87dbb6fe 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -154,6 +154,10 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
 		dev_info(dev, "configured DSP for remoteproc mode\n");
 	}
 
+	ret = dma_coerce_mask_and_coherent(&rproc->dev, DMA_BIT_MASK(48));
+	if (ret)
+		dev_warn(dev, "Failed to set DMA mask (%d)\n", ret);
+
 	ret = devm_rproc_add(dev, rproc);
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");
-- 
2.34.1