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From b43892ab64a2acc92d25cfd30f0fecba2c925cd2 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 1 Jul 2015 12:51:52 +0100
Subject: [PATCH 101/203] bcm2835-sdhost: Clear HBLC for PIO mode
Also update pio_limit default in overlay README.
---
arch/arm/boot/dts/overlays/README | 2 +-
drivers/mmc/host/bcm2835-sdhost.c | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -441,7 +441,7 @@ Params: overclock_50 Clock (
force_pio Disable DMA support (default off)
pio_limit Number of blocks above which to use DMA
- (default 2)
+ (default 1)
debug Enable debug output (default off)
--- a/drivers/mmc/host/bcm2835-sdhost.c
+++ b/drivers/mmc/host/bcm2835-sdhost.c
@@ -699,8 +699,7 @@ static void bcm2835_sdhost_prepare_data(
bcm2835_sdhost_set_transfer_irqs(host);
bcm2835_sdhost_write(host, data->blksz, SDHBCT);
- if (host->use_dma)
- bcm2835_sdhost_write(host, data->blocks, SDHBLC);
+ bcm2835_sdhost_write(host, host->use_dma ? data->blocks : 0, SDHBLC);
BUG_ON(!host->data);
}
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