drm/lima: fix warning when CONFIG_DEBUG_SG=y & CONFIG_DMA_API_DEBUG=y

[ Upstream commit 89636a06fa2ee7826a19c39c19a9bc99ab9340a9 ]

Otherwise get following warning:

DMA-API: lima 1c40000.gpu: mapping sg segment longer than device claims to support [len=4149248] [max=65536]

See: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5496

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Reported-by: Roman Stratiienko <r.stratiienko@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211031041604.187216-1-yuq825@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index 65fdca366e41f00d940f13a0865234fc47df5595..36c99058942788fe6e31cc127b7b22c666bc5c21 100644 (file)
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -357,6 +357,7 @@ int lima_device_init(struct lima_device *ldev)
        int err, i;
 
        dma_set_coherent_mask(ldev->dev, DMA_BIT_MASK(32));
+       dma_set_max_seg_size(ldev->dev, UINT_MAX);
 
        err = lima_clk_init(ldev);
        if (err)