linux-kernel - Re: [PATCH v5 1/9] drm/mediatek/uapi: Add DRM_MTK_GEM_CREATE

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Date: Tue, 16 Apr 2024 10:09:19 -0400
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Shawn Sung <shawn.sung@...iatek.com>, Chun-Kuang Hu
	 <chunkuang.hu@...nel.org>
Cc: Philipp Zabel <p.zabel@...gutronix.de>, David Airlie
 <airlied@...il.com>,  Daniel Vetter <daniel@...ll.ch>, Matthias Brugger
 <matthias.bgg@...il.com>, AngeloGioacchino Del Regno
 <angelogioacchino.delregno@...labora.com>, Maarten Lankhorst
 <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
 Thomas Zimmermann <tzimmermann@...e.de>, Sumit Semwal
 <sumit.semwal@...aro.org>, Christian König
 <christian.koenig@....com>, dri-devel@...ts.freedesktop.org, 
 linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org, 
 linaro-mm-sig@...ts.linaro.org, "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
Subject: Re: [PATCH v5 1/9] drm/mediatek/uapi: Add
 DRM_MTK_GEM_CREATE_ENCRYPTED flag

Hi,

Le mercredi 03 avril 2024 à 18:26 +0800, Shawn Sung a écrit :
> From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
> 
> Add DRM_MTK_GEM_CREATE_ENCRYPTED flag to allow user to allocate

Is "ENCRYPTED" a proper naming ? My expectation is that this would hold data in
a PROTECTED memory region but that no cryptographic algorithm will be involved.

Nicolas

> a secure buffer to support secure video path feature.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
> ---
>  include/uapi/drm/mediatek_drm.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/uapi/drm/mediatek_drm.h b/include/uapi/drm/mediatek_drm.h
> index b0dea00bacbc4..e9125de3a24ad 100644
> --- a/include/uapi/drm/mediatek_drm.h
> +++ b/include/uapi/drm/mediatek_drm.h
> @@ -54,6 +54,7 @@ struct drm_mtk_gem_map_off {
>  
>  #define DRM_MTK_GEM_CREATE		0x00
>  #define DRM_MTK_GEM_MAP_OFFSET		0x01
> +#define DRM_MTK_GEM_CREATE_ENCRYPTED	0x02
>  
>  #define DRM_IOCTL_MTK_GEM_CREATE	DRM_IOWR(DRM_COMMAND_BASE + \
>  		DRM_MTK_GEM_CREATE, struct drm_mtk_gem_create)