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34 lines
1.2 KiB
34 lines
1.2 KiB
From 30941165197c8ee95330d8a306d6e88f12cce5b8 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 1 Jul 2015 12:51:52 +0100
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Subject: [PATCH 101/222] bcm2835-sdhost: Clear HBLC for PIO mode
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Also update pio_limit default in overlay README.
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---
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arch/arm/boot/dts/overlays/README | 2 +-
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drivers/mmc/host/bcm2835-sdhost.c | 3 +--
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2 files changed, 2 insertions(+), 3 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -441,7 +441,7 @@ Params: overclock_50 Clock (
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force_pio Disable DMA support (default off)
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pio_limit Number of blocks above which to use DMA
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- (default 2)
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+ (default 1)
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debug Enable debug output (default off)
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--- a/drivers/mmc/host/bcm2835-sdhost.c
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+++ b/drivers/mmc/host/bcm2835-sdhost.c
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@@ -699,8 +699,7 @@ static void bcm2835_sdhost_prepare_data(
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bcm2835_sdhost_set_transfer_irqs(host);
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bcm2835_sdhost_write(host, data->blksz, SDHBCT);
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- if (host->use_dma)
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- bcm2835_sdhost_write(host, data->blocks, SDHBLC);
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+ bcm2835_sdhost_write(host, host->use_dma ? data->blocks : 0, SDHBLC);
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BUG_ON(!host->data);
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}
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