2022-04-22 15:00:47 +00:00
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From 9d6d90c0e9ecf8f36ca28da9e39d415127312482 Mon Sep 17 00:00:00 2001
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2021-11-24 17:32:01 +00:00
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 27 Aug 2020 16:30:26 +0100
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2022-04-22 15:00:47 +00:00
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Subject: [PATCH 280/828] media: bcm2835-unicam: Drop WARN on uing direct cache
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2021-11-24 17:32:01 +00:00
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alias
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Pi 0&1 pass all ARM accesses through the VPU L2 cache, therefore
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the dma-ranges property sets the cache alias bits to other
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than the direct alias, hence this WARN was firing.
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It was overprotective coding, so assume that everything is OK
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with the dma-ranges, and remove the WARN.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 7 -------
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1 file changed, 7 deletions(-)
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--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
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2022-04-22 15:00:47 +00:00
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@@ -709,13 +709,6 @@ static void unicam_wr_dma_addr(struct un
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2021-11-24 17:32:01 +00:00
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{
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dma_addr_t endaddr = dmaaddr + buffer_size;
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- /*
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- * dmaaddr and endaddr should be a 32-bit address with the top two bits
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- * set to 0x3 to signify uncached access through the Videocore memory
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- * controller.
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- */
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- WARN_ON((dmaaddr >> 30) != 0x3 || (endaddr >> 30) != 0x3);
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-
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if (pad_id == IMAGE_PAD) {
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reg_write(dev, UNICAM_IBSA0, dmaaddr);
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reg_write(dev, UNICAM_IBEA0, endaddr);
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