From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>
Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH] drm: Silence zero EDID carping
Date: Thu, 29 Oct 2020 16:07:46 +0200 [thread overview]
Message-ID: <20201029140746.GD6112@intel.com> (raw)
In-Reply-To: <20201029110030.9959-1-chris@chris-wilson.co.uk>
On Thu, Oct 29, 2020 at 11:00:30AM +0000, Chris Wilson wrote:
> We have a few displays in CI that always report their EDID as a bunch of
> zeroes. This is consistent behavioud, so one assumes intentional
> indication of an "absent" EDID. Let us treat is as such by silently
> reporting the zero edid using connector->null_edid_counter, leaving the
> loud carp to EDID that violate their checksums or otherwise return
> unexpected illegal data upon reading. These are more likely to be
> inconsistent bad connections rather than being intended.
I don't think null_edid_counter is actually used by anything.
So apart from wondering why the mode list has turned strange
is there some way I can still see from the logs that the
EDID has become all zeroes?
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
> drivers/gpu/drm/drm_edid.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 631125b46e04..94549805a204 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -1951,7 +1951,7 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
> break;
> if (i == 0 && drm_edid_is_zero(edid, EDID_LENGTH)) {
> connector->null_edid_counter++;
> - goto carp;
> + goto out;
> }
> }
> if (i == 4)
> --
> 2.20.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel
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next prev parent reply other threads:[~2020-10-29 14:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 11:00 [Intel-gfx] [PATCH] drm: Silence zero EDID carping Chris Wilson
2020-10-29 12:27 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2020-10-29 14:07 ` Ville Syrjälä [this message]
2020-10-29 16:01 ` [Intel-gfx] [PATCH] " Chris Wilson
2020-10-29 16:09 ` Ville Syrjälä
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