From 28b529a98525123acd37372a04d21e87ec2edcf7 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Date: Wed, 15 Jan 2025 11:03:39 +0200
Subject: [PATCH] drm: xlnx: zynqmp: Fix max dma segment size
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
---
drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
index f953ca48a9303..3a9544b97bc53 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
@@ -201,6 +201,8 @@ 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);
--
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