linux-kernel - Re: [PATCH v2 6/6] drm/panfrost: Force AARCH64

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Message-ID: <20250315094722.4c4804c6@collabora.com>
Date: Sat, 15 Mar 2025 09:47:22 +0100
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Ariel D'Alessandro <ariel.dalessandro@...labora.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 robh@...nel.org, steven.price@....com, maarten.lankhorst@...ux.intel.com,
 mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com,
 simona@...ll.ch, kernel@...labora.com, linux-mediatek@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, sjoerd@...labora.com,
 angelogioacchino.delregno@...labora.com
Subject: Re: [PATCH v2 6/6] drm/panfrost: Force AARCH64_4K page table format
 on MediaTek MT8192

On Fri, 14 Mar 2025 14:38:58 -0300
Ariel D'Alessandro <ariel.dalessandro@...labora.com> wrote:

> MediaTek MT8192 SoC has an ARM Mali-G57 MC5 GPU (Valhall-JM). Now that
> Panfrost supports AARCH64_4K page table format, let's enable it on this
> SoC.
> 
> Running glmark2-es2-drm [0] benchmark, reported the same performance
> score on both modes Mali LPAE (LEGACY) vs. AARCH64_4K, before and after
> this commit. Tested on a Mediatek (MT8395) Genio 1200 EVK board.
> 
> [0] https://github.com/glmark2/glmark2
> 
> Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@...labora.com>

Reviewed-by: Boris Brezillon <boris.brezillon@...labora.com>

> ---
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index e854f290858f9..ef30d314b2281 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -836,6 +836,7 @@ static const struct panfrost_compatible mediatek_mt8192_data = {
>  	.num_pm_domains = ARRAY_SIZE(mediatek_mt8192_pm_domains),
>  	.pm_domain_names = mediatek_mt8192_pm_domains,
>  	.pm_features = BIT(GPU_PM_CLK_DIS) | BIT(GPU_PM_VREG_OFF),
> +	.gpu_quirks = BIT(GPU_QUIRK_FORCE_AARCH64_PGTABLE),
>  };
>  
>  static const struct of_device_id dt_match[] = {