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Message-Id: <20240524182702.1317935-19-dave.stevenson@raspberrypi.com>
Date: Fri, 24 May 2024 19:27:02 +0100
From: Dave Stevenson <dave.stevenson@...pberrypi.com>
To: Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Florian Fainelli <florian.fainelli@...adcom.com>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
Vinod Koul <vkoul@...nel.org>,
Maxime Ripard <mripard@...nel.org>,
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Cc: devicetree@...r.kernel.org,
linux-rpi-kernel@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
dmaengine@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
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iommu@...ts.linux.dev,
linux-sound@...r.kernel.org,
Dave Stevenson <dave.stevenson@...pberrypi.com>
Subject: [PATCH 18/18] dmaengine: bcm2835: Revert the workaround for DMA addresses
Now that all DMA clients are passing in CPU addresses, drop
the workaround that would accept those and not try mapping
them.
Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
---
drivers/dma/bcm2835-dma.c | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index 06407691ef28..181f2c291109 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -405,17 +405,6 @@ static int bcm2835_dma_map_slave_addr(struct dma_chan *chan,
struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
struct bcm2835_dma_chan_map *map = &c->map;
- if ((dev_addr & 0xfe000000ULL) == 0x7e000000ULL) {
- /*
- * Address is already in the 0x7e... peripherals range.
- * Assume this is an old client that hasn't been updated to
- * correctly pass a cpu phys_addr to the DMA subsystem.
- */
- map->addr = dev_addr;
-
- return 0;
- }
-
if (dev_size != DMA_SLAVE_BUSWIDTH_4_BYTES)
return -EIO;
--
2.34.1
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