linux-kernel - [RFC] drm: Helper macro for drm state duplication

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Message-ID: <1486654902-2558-1-git-send-email-mihail.atanassov@arm.com>
Date:   Thu, 9 Feb 2017 15:41:41 +0000
From:   Mihail Atanassov <mihail.atanassov@....com>
To:     <dri-devel@...ts.freedesktop.org>
CC:     Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        "David Airlie" <airlied@...ux.ie>,
        Liviu Dudau <liviu.dudau@....com>,
        Brian Starkey <brian.starkey@....com>,
        <linux-kernel@...r.kernel.org>, <nd@....com>
Subject: [RFC] drm: Helper macro for drm state duplication

Hi,

I was working on a few patches adding fields to struct malidp_crtc_state and
found myself writing memcpy multiple times in the ->atomic_duplicate_state
hook because I wanted to avoid copying the drm_crtc_state twice
(__drm_atomic_helper_crtc_duplicate_state copies it already). I figured this
also applies to the other drm_*_state derivatives, so I concocted a macro
helper to do the copy in one chunk (two if you count the __drm_atomic_helper*
one). I'd appreciate some comments on whether anyone else might find this
macro useful. Thanks!

Mihail Atanassov (1):
  drm: Add helper macro for duplicating custom drm_*_state

 include/drm/drm_atomic_helper.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

-- 
Mihail Atanassov