linux-kernel - Re: [PATCH v3] drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT

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Date:   Thu, 18 May 2017 10:42:03 +0100
From:   Emil Velikov <emil.l.velikov@...il.com>
To:     Robert Foss <robert.foss@...labora.com>
Cc:     Liviu Dudau <liviu.dudau@....com>,
        Brian Starkey <brian.starkey@....com>,
        Mali DP Maintainers <malidp@...s.arm.com>,
        David Airlie <airlied@...ux.ie>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Boris BREZILLON <boris.brezillon@...e-electrons.com>,
        "Vetter, Daniel" <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Clark <robdclark@...il.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        VMware Graphics <linux-graphics-maintainer@...are.com>,
        Sinclair Yeh <syeh@...are.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Archit Taneja <architt@...eaurora.org>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        freedreno@...ts.freedesktop.org,
        ML nouveau <nouveau@...ts.freedesktop.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Kristian Høgsberg <hoegsberg@...il.com>
Subject: Re: [PATCH v3] drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ to UAPI

Hi Rob,

On 18 May 2017 at 02:39, Robert Foss <robert.foss@...labora.com> wrote:
> Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ defines to the UAPI
> as a convenience.
>
> Ideally the DRM_ROTATE_ and DRM_REFLECT_ property ids are looked up
> through the atomic API, but realizing that userspace is likely to take
> shortcuts and assume that the enum values are what is sent over the
> wire.
>
> As a result these defines are provided purely as a convenience to
> userspace applications.
>
> Signed-off-by: Robert Foss <robert.foss@...labora.com>
> ---
> Changes since v2:
>  - Changed define prefix from DRM_MODE_PROP_ to DRM_MODE_
>  - Fix compilation errors
>  - Changed comment formatting
>  - Deduplicated comment lines
>  - Clarified DRM_MODE_PROP_REFLECT_ comment
>
> Changes since v1:
>  - Moved defines from drm.h to drm_mode.h
>  - Changed define prefix from DRM_ to DRM_MODE_PROP_
>  - Updated uses of the defines to the new prefix
>  - Removed include from drm_rect.c
>  - Stopped using the BIT() macro
>
Reviewed-by: Emil Velikov <emil.velikov@...labora.com>

-Emil