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Date: Fri, 21 Apr 2017 12:44:49 +0300 From: Ville Syrjälä <ville.syrjala@...ux.intel.com> To: Gerd Hoffmann <kraxel@...hat.com> Cc: Pekka Paalanen <ppaalanen@...il.com>, dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel.vetter@...el.com>, Ilia Mirkin <imirkin@...m.mit.edu>, Michel Dänzer <michel@...nzer.net>, Alex Deucher <alexdeucher@...il.com>, amd-gfx@...ts.freedesktop.org, Jani Nikula <jani.nikula@...ux.intel.com>, Sean Paul <seanpaul@...omium.org>, David Airlie <airlied@...ux.ie>, open list <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] drm: fourcc byteorder: brings header file comments in line with reality. On Fri, Apr 21, 2017 at 11:38:28AM +0200, Gerd Hoffmann wrote: > Hi, > > > > Leaving the yuv formats as-is. I have no idea if and how those are used > > > on bigendian machines. > > > just an idea - since we are not sure how the remaining formats are being > > used, should those be marked somehow uncertain whether they are little > > or native endian? > > ATM the yuv don't have any byte order annotations, and I simply left > them that way. So it is as clear/unclear as before. Eh? Everything that is affected by byte order has the relevant comments. If they don't, then that's a bug. > > IIRC someone mentioned that for the yuv fourccs there actually is some > standard about the exact ordering. Anyone has a good reference? We > could stick a link to it into a comment. The "standard" is fourcc. Whether there is any official reference for that is unclear. That's exactly why I added the explicit comments into drm_fourcc.h so that people don't have to go trawling the internets looking for information on what each pixel format might mean. -- Ville Syrjälä Intel OTC
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