[igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Fix a check in is_6bpc function

[Srinivas, Vidya]

Hello Ville,

Apologies. I tried to turn off dithering from kernel itself. But still CRC mismatch came up.
This is on Jasperlake chromebook which is using 6bpc panel.

Same jasperlake with 8bpc panel is working fine. 

So, as last resort we did this ☹.

Regards
Vidya

-----Original Message-----
From: Ville Syrjälä <ville.syrjala at linux.intel.com> 
Sent: Wednesday, July 14, 2021 3:55 PM
To: Srinivas, Vidya <vidya.srinivas at intel.com>
Cc: igt-dev at lists.freedesktop.org
Subject: Re: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Fix a check in is_6bpc function

On Wed, Jul 14, 2021 at 01:30:02PM +0530, Vidya Srinivas wrote:
> Fixes commit 3bf28f9dffd41b85c262d4e6664ffbdf5b7d9a93.
> 
> is_6bpc is supposed to return false if connector is not eDP or DSI.
> The right check will be DRM_MODE_CONNECTOR_eDP && 
> DRM_MODE_CONNECTOR_DSI By mistake DRM_MODE_CONNECTOR_eDP || 
> DRM_MODE_CONNECTOR_DSI was being used.

Instead of these incomplete hacks why aren't we just turning off dithering when doing crc capture?

> 
> Credits-to: Ashutosh Dixit <ashutosh.dixit at intel.com>
> Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
> ---
>  tests/kms_plane_alpha_blend.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tests/kms_plane_alpha_blend.c 
> b/tests/kms_plane_alpha_blend.c index a3529dc2190f..8020216c1594 
> 100644
> --- a/tests/kms_plane_alpha_blend.c
> +++ b/tests/kms_plane_alpha_blend.c
> @@ -454,7 +454,7 @@ static bool is_6bpc(igt_display_t *display, enum pipe pipe) {
>  		return false;
>  
>  	c = output->config.connector;
> -	if (c->connector_type != DRM_MODE_CONNECTOR_eDP ||
> +	if (c->connector_type != DRM_MODE_CONNECTOR_eDP &&
>  		c->connector_type != DRM_MODE_CONNECTOR_DSI)
>  		return false;
>  
> --
> 2.32.0
> 
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--
Ville Syrjälä
Intel