linux-kernel - [PATCH 3/7] drm/sun4i: backend: Remove the MBUS quirks

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Message-Id: <20201106151411.321743-4-maxime@cerno.tech>
Date:   Fri,  6 Nov 2020 16:14:07 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>, Christoph Hellwig <hch@....de>
Cc:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Yong Deng <yong.deng@...ewell.com>,
        linux-arm-kernel@...ts.infradead.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>,
        Robin Murphy <robin.murphy@....com>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: [PATCH 3/7] drm/sun4i: backend: Remove the MBUS quirks

Now that the MBUS quirks are applied by our global notifier, we can
remove them from our DRM driver.

Suggested-by: Christoph Hellwig <hch@....de>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 55960cbb1019..522e51a404cc 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -805,25 +805,6 @@ static int sun4i_backend_bind(struct device *dev, struct device *master,
 		ret = of_dma_configure(drm->dev, dev->of_node, true);
 		if (ret)
 			return ret;
-	} else {
-		/*
-		 * If we don't have the interconnect property, most likely
-		 * because of an old DT, we need to set the DMA offset by hand
-		 * on our device since the RAM mapping is at 0 for the DMA bus,
-		 * unlike the CPU.
-		 *
-		 * XXX(hch): this has no business in a driver and needs to move
-		 * to the device tree.
-		 *
-		 * If we have two subsequent calls to dma_direct_set_offset
-		 * returns -EINVAL. Unfortunately, this happens when we have two
-		 * backends in the system, and will result in the driver
-		 * reporting an error while it has been setup properly before.
-		 * Ignore EINVAL, but it should really be removed eventually.
-		 */
-		ret = dma_direct_set_offset(drm->dev, PHYS_OFFSET, 0, SZ_4G);
-		if (ret && ret != -EINVAL)
-			return ret;
 	}
 
 	backend->engine.node = dev->of_node;
-- 
2.28.0