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From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 6/6] p2371-2180: Add support for framebuffer carveouts
Date: Tue, 19 Mar 2019 09:24:37 +0800	[thread overview]
Message-ID: <CAPnjgZ3vgQcP6NweWTmMrLdfo1FM=7Q6yZ=HfUr_8KqE3E8YXg@mail.gmail.com> (raw)
In-Reply-To: <20190308201140.2383-6-thierry.reding@gmail.com>

On Sat, 9 Mar 2019 at 04:11, Thierry Reding <thierry.reding@gmail.com> wrote:
>
> From: Thierry Reding <treding@nvidia.com>
>
> If early firmware initialized the display hardware and the display
> controllers are scanning out a framebuffer (e.g. a splash screen), make
> sure to pass information about the memory location of that framebuffer
> to the kernel before booting to avoid the kernel from using that memory
> for the buddy allocator.
>
> This same mechanism can also be used in the kernel to set up early SMMU
> mappings and avoid SMMU faults caused by the display controller reading
> from memory for which it has no mapping.
>
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
>  board/nvidia/p2371-2180/p2371-2180.c | 50 ++++++++++++++++++++++++++++
>  configs/p2371-2180_defconfig         |  1 +
>  2 files changed, 51 insertions(+)

Reviewed-by: Simon Glass <sjg@chromium.org>

  reply	other threads:[~2019-03-19  1:24 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-08 20:11 [U-Boot] [PATCH 1/6] fdtdec: Add cpu_to_fdt_{addr,size}() macros Thierry Reding
2019-03-08 20:11 ` [U-Boot] [PATCH 2/6] fdtdec: Implement fdtdec_get_max_phandle() Thierry Reding
2019-03-10 21:51   ` Simon Glass
2019-03-11  9:27     ` Thierry Reding
2019-03-19  1:24       ` Simon Glass
2019-03-08 20:11 ` [U-Boot] [PATCH 3/6] fdtdec: Implement fdtdec_set_phandle() Thierry Reding
2019-03-10 21:51   ` Simon Glass
2019-03-11 10:04     ` Thierry Reding
2019-03-19  1:24       ` Simon Glass
2019-03-08 20:11 ` [U-Boot] [PATCH 4/6] fdtdec: Implement fdtdec_add_reserved_memory() Thierry Reding
2019-03-10 21:51   ` Simon Glass
2019-03-11 10:06     ` Thierry Reding
2019-03-19  1:24       ` Simon Glass
2019-03-08 20:11 ` [U-Boot] [PATCH 5/6] fdtdec: Implement carveout support functions Thierry Reding
2019-03-10 21:51   ` Simon Glass
2019-03-08 20:11 ` [U-Boot] [PATCH 6/6] p2371-2180: Add support for framebuffer carveouts Thierry Reding
2019-03-19  1:24   ` Simon Glass [this message]
2019-03-10 21:51 ` [U-Boot] [PATCH 1/6] fdtdec: Add cpu_to_fdt_{addr, size}() macros Simon Glass

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