target/linux/brcm2708/patches-4.1/0101-bcm2835-sdhost-Clear-HBLC-for-PIO-mode.patch

   1 From 0ca1e1d7ffdfcf1e716205491a00bf025fb71a77 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 1 Jul 2015 12:51:52 +0100
   4 Subject: [PATCH 101/121] bcm2835-sdhost: Clear HBLC for PIO mode
   5
   6 Also update pio_limit default in overlay README.
   7 ---
   8  arch/arm/boot/dts/overlays/README | 2 +-
   9  drivers/mmc/host/bcm2835-sdhost.c | 3 +--
  10  2 files changed, 2 insertions(+), 3 deletions(-)
  11
  12 --- a/arch/arm/boot/dts/overlays/README
  13 +++ b/arch/arm/boot/dts/overlays/README
  14 @@ -441,7 +441,7 @@ Params: overclock_50             Clock (
  15          force_pio                Disable DMA support (default off)
  16
  17          pio_limit                Number of blocks above which to use DMA
  18 -                                 (default 2)
  19 +                                 (default 1)
  20
  21          debug                    Enable debug output (default off)
  22
  23 --- a/drivers/mmc/host/bcm2835-sdhost.c
  24 +++ b/drivers/mmc/host/bcm2835-sdhost.c
  25 @@ -699,8 +699,7 @@ static void bcm2835_sdhost_prepare_data(
  26         bcm2835_sdhost_set_transfer_irqs(host);
  27
  28         bcm2835_sdhost_write(host, data->blksz, SDHBCT);
  29 -       if (host->use_dma)
  30 -               bcm2835_sdhost_write(host, data->blocks, SDHBLC);
  31 +       bcm2835_sdhost_write(host, host->use_dma ? data->blocks : 0, SDHBLC);
  32
  33         BUG_ON(!host->data);
  34  }