[Intel-gfx] [PATCH i-g-t 1/2] tests/kms_setmode: Request the intiial vbl count with RELATIVE instead of ABSOLUTE

[Daniel Vetter]

On Mon, Oct 09, 2017 at 07:33:49PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Asking for the initial vblank count by specifying and absolute vblank count of 0
> doesn't make much sense. Switch to a relative query instead.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  tests/kms_setmode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tests/kms_setmode.c b/tests/kms_setmode.c
> index 206d360607bb..ed5d97442255 100644
> --- a/tests/kms_setmode.c
> +++ b/tests/kms_setmode.c
> @@ -431,7 +431,7 @@ static void check_timings(int crtc_idx, const drmModeModeInfo *kmode)
>  
>  	memset(&wait, 0, sizeof(wait));
>  	wait.request.type = kmstest_get_vbl_flag(crtc_idx);
> -	wait.request.type |= DRM_VBLANK_ABSOLUTE | DRM_VBLANK_NEXTONMISS;
> +	wait.request.type |= DRM_VBLANK_RELATIVE | DRM_VBLANK_NEXTONMISS;

Looking at drm_wait_vblank_is_query() in drm_vblank.c you also want to
drop NEXTONMISS. With that:

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> on both.

Cheers, Daniel
>  	do_or_die(drmWaitVBlank(drm_fd, &wait));
>  
>  	last_seq = wait.reply.sequence;
> -- 
> 2.13.5
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch