drm: xlnx: zynqmp: Fix max dma segment size

[ Upstream commit 28b529a98525123acd37372a04d21e87ec2edcf7 ]

Fix "mapping sg segment longer than device claims to support" warning by
setting the max segment size.

Fixes: d76271d22694 ("drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort Subsystem")
Reviewed-by: Sean Anderson <sean.anderson@linux.dev>
Tested-by: Sean Anderson <sean.anderson@linux.dev>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250115-xilinx-formats-v2-10-160327ca652a@ideasonboard.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
index f5781939de9c357778b36b2592b88df5c91ca38f..a25b22238e3d2f29277b74bc4306e261a58b72d4 100644 (file)
--- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
@@ -231,6 +231,8 @@ static int zynqmp_dpsub_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
+       dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
+
        /* Try the reserved memory. Proceed if there's none. */
        of_reserved_mem_device_init(&pdev->dev);