[PATCH] xfree86: Add Option "PreferCloneMode"

[Alex Deucher]

On Thu, May 25, 2017 at 3:21 AM, Michel Dänzer <michel at daenzer.net> wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> When the default behaviour was changed from clone mode to horizontal
> extended layout, a boolean ScrnInfoRec member preferClone was introduced
> to choose the old default behaviour. Option "PreferCloneMode" allows
> setting this preferClone member.
>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  hw/xfree86/man/xorg.conf.man | 5 +++++
>  hw/xfree86/modes/xf86Crtc.c  | 4 ++++
>  2 files changed, 9 insertions(+)
>
> diff --git a/hw/xfree86/man/xorg.conf.man b/hw/xfree86/man/xorg.conf.man
> index 0c39062e6..ec8d07c65 100644
> --- a/hw/xfree86/man/xorg.conf.man
> +++ b/hw/xfree86/man/xorg.conf.man
> @@ -1495,6 +1495,11 @@ option.
>  .BI "Option \*qModeDebug\*q \*q" boolean \*q
>  Enable printing of additional debugging information about modesetting to
>  the server log.
> +.TP 7
> +.BI "Option \*qPreferCloneMode\*q \*q" boolean \*q
> +If enabled, bring up monitors of a screen in clone mode instead of horizontal
> +extended layout by default. (Defaults to off; the video driver can change the
> +default value, but this option can always override it)
>  .ig
>  .TP 7
>  This optional entry allows an IRQ number to be specified.
> diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
> index 3f9857b4a..fa404d9d4 100644
> --- a/hw/xfree86/modes/xf86Crtc.c
> +++ b/hw/xfree86/modes/xf86Crtc.c
> @@ -469,10 +469,12 @@ static OptionInfoRec xf86OutputOptions[] = {
>
>  enum {
>      OPTION_MODEDEBUG,
> +    OPTION_PREFER_CLONEMODE,
>  };
>
>  static OptionInfoRec xf86DeviceOptions[] = {
>      {OPTION_MODEDEBUG, "ModeDebug", OPTV_BOOLEAN, {0}, FALSE},
> +    {OPTION_PREFER_CLONEMODE, "PreferCloneMode", OPTV_BOOLEAN, {0}, FALSE},
>      {-1, NULL, OPTV_NONE, {0}, FALSE},
>  };
>
> @@ -2134,6 +2136,8 @@ xf86TargetRightOf(ScrnInfoPtr scrn, xf86CrtcConfigPtr config,
>      Bool has_tile = FALSE;
>      uint32_t configured_outputs;
>
> +    xf86GetOptValBool(config->options, OPTION_PREFER_CLONEMODE,
> +                      &scrn->preferClone);
>      if (scrn->preferClone)
>          return FALSE;
>
> --
> 2.11.0
>
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