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

From: Daniel Vetter
Date: Thu Mar 30 2017 - 04:17:32 EST


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@xxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Signed-off-by: Javi Merino <javi.merino@xxxxxxxxxx>

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