linux-kernel - Re: [PATCH 5/5] memory: tegra: Complete tegra210

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Date:   Tue, 27 Oct 2020 14:01:11 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     krzk@...nel.org, robh+dt@...nel.org, jonathanh@...dia.com,
        linux-tegra@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] memory: tegra: Complete tegra210_swgroups

On Wed, Oct 07, 2020 at 05:37:46PM -0700, Nicolin Chen wrote:
> According to Tegra X1 TRM, there are missing swgroups in the
> tegra210_swgroups list. So this patch adds them to the list.
> 
> Note that the TEGRA_SWGROUP_GPU (in list) should be actually
> TEGRA_SWGROUP_GPUB (in TRM), yet TEGRA_SWGROUP_GPU (in TRM)
> is not being used -- only TEGRA_SWGROUP_GPUB (in TRM) is. So
> this patch does not add TEGRA_SWGROUP_GPU (in TRM) and keeps
> TEGRA_SWGROUP_GPU (in list) as it is.
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka@...il.com>
> ---
>  drivers/memory/tegra/tegra210.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/memory/tegra/tegra210.c b/drivers/memory/tegra/tegra210.c
> index b400802c9f14..b3bbc5a05ba1 100644
> --- a/drivers/memory/tegra/tegra210.c
> +++ b/drivers/memory/tegra/tegra210.c
> @@ -1028,6 +1028,8 @@ static const struct tegra_smmu_swgroup tegra210_swgroups[] = {
>  	{ .name = "hda",       .swgroup = TEGRA_SWGROUP_HDA,       .reg = 0x254 },
>  	{ .name = "isp2",      .swgroup = TEGRA_SWGROUP_ISP2,      .reg = 0x258 },
>  	{ .name = "nvenc",     .swgroup = TEGRA_SWGROUP_NVENC,     .reg = 0x264 },
> +	{ .name = "nv",        .swgroup = TEGRA_SWGROUP_NV,        .reg = 0x268 },
> +	{ .name = "nv2",       .swgroup = TEGRA_SWGROUP_NV2,       .reg = 0x26c },

Oddly enough I can see these in the TRM, but they are not in the
internal reference manuals that are supposed to be the canonical
reference for the TRM. Perhaps the TRM is out of date?

Thierry

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