linux-kernel - [PATCH 2/6] media: cedrus: Add a quirk for not setting DMA offset

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Date:   Mon, 28 Jan 2019 21:55:00 +0100
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     maxime.ripard@...tlin.com, wens@...e.org
Cc:     mchehab@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: [PATCH 2/6] media: cedrus: Add a quirk for not setting DMA offset

H6 VPU doesn't work if DMA offset is set.

Add a quirk for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 drivers/staging/media/sunxi/cedrus/cedrus.h    | 3 +++
 drivers/staging/media/sunxi/cedrus/cedrus_hw.c | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
index 4aedd24a9848..c57c04b41d2e 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.h
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
@@ -28,6 +28,8 @@
 
 #define CEDRUS_CAPABILITY_UNTILED	BIT(0)
 
+#define CEDRUS_QUIRK_NO_DMA_OFFSET	BIT(0)
+
 enum cedrus_codec {
 	CEDRUS_CODEC_MPEG2,
 
@@ -91,6 +93,7 @@ struct cedrus_dec_ops {
 
 struct cedrus_variant {
 	unsigned int	capabilities;
+	unsigned int	quirks;
 };
 
 struct cedrus_dev {
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
index 0acf219a8c91..fbfff7c1c771 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
@@ -177,7 +177,8 @@ int cedrus_hw_probe(struct cedrus_dev *dev)
 	 */
 
 #ifdef PHYS_PFN_OFFSET
-	dev->dev->dma_pfn_offset = PHYS_PFN_OFFSET;
+	if (!(variant->quirks & CEDRUS_QUIRK_NO_DMA_OFFSET))
+		dev->dev->dma_pfn_offset = PHYS_PFN_OFFSET;
 #endif
 
 	ret = of_reserved_mem_device_init(dev->dev);
-- 
2.20.1