linux-kernel - Re: [PATCH v5 1/8] drm/fourcc: Add modifier definitions for describing Amlogic Video Framebuffer Compression

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Message-ID: <20200421121641.GU3456981@phenom.ffwll.local>
Date:   Tue, 21 Apr 2020 14:16:41 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-amlogic@...ts.infradead.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH v5 1/8] drm/fourcc: Add modifier definitions for
 describing Amlogic Video Framebuffer Compression

On Mon, Apr 20, 2020 at 12:21:24PM +0200, Neil Armstrong wrote:
> On 17/04/2020 20:14, Daniel Vetter wrote:
> > On Fri, Apr 17, 2020 at 6:05 PM Neil Armstrong <narmstrong@...libre.com> wrote:
> >>
> >> On 17/04/2020 17:07, Daniel Vetter wrote:
> 
> [...]
> 
> > 
> > Yup there's a number of parametried modifiers. As long as the stuff
> > you get from a DRM_FORMAT_MOD_ ... macro is a full modifier with
> > everything it should be all fine.
> 
> Would something like that be ok ?
> 
> #define __fourcc_mod_amlogic_layout_mask 0xf
> #define __fourcc_mod_amlogic_options_shift 8
> #define __fourcc_mod_amlogic_options_mask 0xf
> 
> #define DRM_FORMAT_MOD_AMLOGIC_FBC(__layout, __options) \
> 	fourcc_mod_code(AMLOGIC, \
> 			((__layout) & __fourcc_mod_amlogic_layout_mask) | \
> 			((options) & __fourcc_mod_amlogic_options_mask \
> 			 << __fourcc_mod_amlogic_options_shift))
> 
> /* Amlogic FBC Layouts */
> 
> /* bla */
> #define AMLOGIC_FBC_LAYOUT_BASIC		(1ULL)
> 
> /* bla */
> #define AMLOGIC_FBC_LAYOUT_SCATTER		(2ULL)
> 
> /* Amlogic FBC Layout Options Bit Mask */
> 
> /* bla */
> #define AMLOGIC_FBC_OPTION_MEM_SAVING		(1ULL << 0)

lgtm.
-Daniel

> 
> Neil
> 
> > -Daniel
> > 
> >> Neil
> >>
> >>> -Daniel
> >>>
> >>>> +
> >>>>  #if defined(__cplusplus)
> >>>>  }
> >>>>  #endif
> >>>> --
> >>>> 2.22.0
> >>>>
> >>>
> >>
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@...ts.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> > 
> > 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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