[U-Boot] [PATCH v3] ARM: tegra: Disable VPR

[Thierry Reding <thierry.reding@gmail.com>]

On Tue, Jun 24, 2014 at 11:45:29AM +0900, Alexandre Courbot wrote:
> From: Bryan Wu <pengw@nvidia.com>
> 
> On Tegra114 and Tegra124 platforms, certain display-related registers cannot
> be accessed unless the VPR registers are programmed.  For bootloader, we
> probably don't care about VPR, so we disable it (which counts as programming
> it, and allows those display-related registers to be accessed.
> 
> This patch is based on the commit 5f499646c83ba08079f3fdff6591f638a0ce4c0c
> in Chromium OS U-Boot project.
> 
> Signed-off-by: Andrew Chew <achew@nvidia.com>
> Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>
> Signed-off-by: Bryan Wu <pengw@nvidia.com>
> [acourbot: ensure write went through, vpr.c style changes]
> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
> Reviewed-by: Stephen Warren <swarren@nvidia.com>
> Cc: Tom Warren <TWarren@nvidia.com>
> Cc: Stephen Warren <swarren@nvidia.com>
> Cc: Terje Bergstrom <tbergstrom@nvidia.com>
> ---
> Changes since v2:
> - Remove useless switch case
> 
> Changes since v1:
> - Use proper defines for fields values
> - Move MC layout to T124 arch as it is exclusive to it
> - Only compile VPR support if T124 is enabled
> 
>  arch/arm/cpu/tegra-common/Makefile      |  1 +
>  arch/arm/cpu/tegra-common/ap.c          |  3 ++
>  arch/arm/cpu/tegra-common/vpr.c         | 35 +++++++++++++++++++++++
>  arch/arm/include/asm/arch-tegra/ap.h    |  9 ++++++
>  arch/arm/include/asm/arch-tegra124/mc.h | 49 +++++++++++++++++++++++++++++++++
>  5 files changed, 97 insertions(+)
>  create mode 100644 arch/arm/cpu/tegra-common/vpr.c
>  create mode 100644 arch/arm/include/asm/arch-tegra124/mc.h

Tested-by: Thierry Reding <treding@nvidia.com>
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