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From: Jernej Skrabec <jernej.skrabec@gmail.com>
To: mripard@kernel.org, wens@csie.org
Cc: airlied@linux.ie, daniel@ffwll.ch, samuel@sholland.org,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	Jernej Skrabec <jernej.skrabec@gmail.com>
Subject: [PATCH] drm/sun4i: Add DMA mask and segment size
Date: Thu, 16 Jun 2022 23:32:40 +0200	[thread overview]
Message-ID: <20220616213240.392041-1-jernej.skrabec@gmail.com> (raw)

Kernel occasionally complains that there is mismatch in segment size
when trying to render HW decoded videos and rendering them directly with
sun4i DRM driver.

Fix that by setting DMA mask and segment size.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 275f7e4a03ae..83f4e87f77f6 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/component.h>
+#include <linux/dma-mapping.h>
 #include <linux/kfifo.h>
 #include <linux/module.h>
 #include <linux/of_graph.h>
@@ -367,6 +368,9 @@ static int sun4i_drv_probe(struct platform_device *pdev)
 
 	INIT_KFIFO(list.fifo);
 
+	dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
+
 	for (i = 0;; i++) {
 		struct device_node *pipeline = of_parse_phandle(np,
 								"allwinner,pipelines",
-- 
2.36.1


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             reply	other threads:[~2022-06-16 21:34 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-16 21:32 Jernej Skrabec [this message]
2022-06-17  3:03 ` [PATCH] drm/sun4i: Add DMA mask and segment size Samuel Holland
2022-06-17  4:13   ` Jernej Škrabec
2022-06-17  5:10     ` Samuel Holland

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