[Bug 74964] [BYT]I-G-T/testdisplay && 1920x1080i showing half screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74964

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #8 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #7)
> A quick test would be to try:
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index d5eafd1..d58966a 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -5333,7 +5333,7 @@ static void i9xx_set_pipeconf(struct intel_crtc
> *intel_crtc)
>  
>         if (!IS_GEN2(dev) &&
>             intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
> -               pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
> +               pipeconf |= PIPECONF_INTERLACE_W_SYNC_SHIFT_PANEL;
>         else
>                 pipeconf |= PIPECONF_PROGRESSIVE;
>  
> 
> (This is likely to regress HDMI though and !BYT - but we should also see a
> similar bug on gm45.)

1920x1080i unable to display with this patch. it shows "Display No Signal"
thanks.

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