From: Thierry Reding <thierry.reding@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3] ARM: tegra: Disable VPR
Date: Fri, 27 Jun 2014 18:21:47 +0200 [thread overview]
Message-ID: <20140627162146.GA14273@ulmo> (raw)
In-Reply-To: <1403577929-4198-1-git-send-email-acourbot@nvidia.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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next prev parent reply other threads:[~2014-06-27 16:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-24 2:45 [U-Boot] [PATCH v3] ARM: tegra: Disable VPR Alexandre Courbot
2014-06-27 16:21 ` Thierry Reding [this message]
2014-07-02 2:17 ` Alexandre Courbot
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