[igt-dev] [PATCH i-g-t 7/7] tests/kms_ccs: Larger fb to fully cover up the primary plane

[Juha-Pekka Heikkila]

I wouldn't go reverting this limitation. Idea of this test is to see if 
ccs work but not how big planes can be used with ccs. Matt's patch was 
to fix that two planes 1080p problem on APL but if you go see the 
machine https://intel-gfx-ci.01.org/hardware.html#fi-apl-guc you'll 
notice it support 4096x2160 at 60Hz at highest. After removing this 
limitation all you need to do to fail this test is to change the monitor.

This igt test was originally limited due to this machine 
https://intel-gfx-ci.01.org/hardware.html#fi-kbl-soraka which is meant 
to be Chromebook with 2400x1600 size display. Quickly looking it seems 
Soraka has not been recently running so much CI runs though.

/Juha-Pekka

On 21.2.2019 16.41, Dhinakaran Pandiyan wrote:
> This is a revert of commit 27fa97d16294 ("tests/kms_ccs: Avoid using plane
> sizes which exceed hw capability"). The watermarks issue that the patch
> refers to has been fixed as per the bugzilla, so let's use an fb that
> covers the whole screen.
> 
> Cc: Clinton Taylor <clinton.a.taylor at intel.com>
> Cc: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> References: https://bugs.freedesktop.org/show_bug.cgi?id=105458
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> ---
>   tests/kms_ccs.c | 16 +++-------------
>   1 file changed, 3 insertions(+), 13 deletions(-)
> 
> diff --git a/tests/kms_ccs.c b/tests/kms_ccs.c
> index 8cbf100f..48f10af0 100644
> --- a/tests/kms_ccs.c
> +++ b/tests/kms_ccs.c
> @@ -69,15 +69,6 @@ const struct {
>   	{0.0, 1.0, 0.0}
>   };
>   
> -/*
> - * Limit maximum used sprite plane width so this test will not mistakenly
> - * fail on hardware limitations which are not interesting to this test.
> - * On this test too wide sprite plane may fail during creation with dmesg
> - * comment saying:
> - * "Requested display configuration exceeds system watermark limitations"
> - */
> -#define MAX_SPRITE_PLANE_WIDTH 2000
> -
>   struct local_drm_format_modifier {
>          /* Bitmask of formats in get_plane format list this info applies to. The
>   	* offset allows a sliding window of which 64 formats (bits).
> @@ -313,13 +304,12 @@ static bool try_config(data_t *data, enum test_fb_flags fb_flags,
>   	if (data->plane && fb_flags & FB_COMPRESSED) {
>   		if (!plane_has_format_with_ccs(data, data->plane, DRM_FORMAT_XRGB8888))
>   			return false;
> -		generate_fb(data, &fb, min(MAX_SPRITE_PLANE_WIDTH, drm_mode->hdisplay),
> -			    drm_mode->vdisplay,
> +		generate_fb(data, &fb, drm_mode->hdisplay, drm_mode->vdisplay,
>   			    (fb_flags & ~FB_COMPRESSED) | FB_HAS_PLANE);
>   		generate_fb(data, &fb_sprite, 256, 256, fb_flags);
>   	} else {
> -		generate_fb(data, &fb, min(MAX_SPRITE_PLANE_WIDTH, drm_mode->hdisplay),
> -			    drm_mode->vdisplay, fb_flags);
> +		generate_fb(data, &fb, drm_mode->hdisplay, drm_mode->vdisplay,
> +			    fb_flags);
>   	}
>   
>   	if (data->flags & TEST_FAIL_ON_ADDFB2)
>