linux-kernel - Re: [PATCH RESEND] drm: use .hword to represent 16-bit numbers

Open Source and information security mailing list archives

Date:   Thu, 30 Mar 2017 10:15:39 +0200
From:   Daniel Vetter <daniel@...ll.ch>
To:     Javi Merino <javi.merino@...nel.org>
Cc:     airlied@...ux.ie, C.Emde@...dl.org,
        linux-kernel@...ts.codethink.co.uk,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] drm: use .hword to represent 16-bit numbers

On Wed, Mar 29, 2017 at 02:45:23PM +0100, Javi Merino wrote:
> The size of .word is the size of a word in the given platform, which
> for intel systems is 16-bits but other architectures use different
> sizes.  However, .hword emits 16-bit numbers regardless of the
> platform (and despite the name).  The quantities specified in EDID are
> platform independent, so they should work in spite of the default
> target of the cc you are using, so use .hword where EDID specifies
> 16-bit numbers.
> 
> Cc: Carsten Emde <C.Emde@...dl.org>
> Cc: David Airlie <airlied@...ux.ie>
> Signed-off-by: Javi Merino <javi.merino@...nel.org>

Applied to drm-misc, thanks.
-Daniel

> ---
>  Documentation/EDID/edid.S | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/EDID/edid.S b/Documentation/EDID/edid.S
> index 7ac0327..ef082dc 100644
> --- a/Documentation/EDID/edid.S
> +++ b/Documentation/EDID/edid.S
> @@ -59,9 +59,9 @@
>  /* Fixed header pattern */
>  header:		.byte	0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x00
>  
> -mfg_id:		.word	swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))
> +mfg_id:		.hword	swap16(mfgname2id(MFG_LNX1, MFG_LNX2, MFG_LNX3))
>  
> -prod_code:	.word	0
> +prod_code:	.hword	0
>  
>  /* Serial number. 32 bits, little endian. */
>  serial_number:	.long	SERIAL
> @@ -177,7 +177,7 @@ std_vres:	.byte	(XY_RATIO<<6)+VFREQ-60
>  
>  descriptor1:
>  /* Pixel clock in 10 kHz units. (0.-655.35 MHz, little-endian) */
> -clock:		.word	CLOCK/10
> +clock:		.hword	CLOCK/10
>  
>  /* Horizontal active pixels 8 lsbits (0-4095) */
>  x_act_lsb:	.byte	XPIX&0xff
> -- 
> 2.1.4
> 
> _______________________________________________
> 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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