[PATCH] drm: Add EDID_QUIRK_FORCE_REDUCED_BLANKING for LG SL80

[Paul Menzel]

Am Mittwoch, den 15.08.2012, 17:18 +0200 schrieb Paul Menzel:
> Date: Wed Aug 15 17:10:51 2012 +0200
> 
> Connecting a LG SL80 [1] a garbled screen is shown with vertical stripes
> in the top half.
> 
> In commit bc42aabc [2]
> 
>         commit bc42aabc6a01b92b0f961d65671564e0e1cd7592
>         Author: Adam Jackson <ajax at redhat.com>
>         Date:   Wed May 23 16:26:54 2012 -0400
> 
>             drm/edid/quirks: ViewSonic VA2026w
> 
> Adam Jackson added the quirk `EDID_QUIRK_FORCE_REDUCED_BLANKING` which
> is also needed for this LG TV.
> 
> All log files and output from `xrandr` is included in the referenced
> Bugzilla report #53544.
> 
> [1] http://www.lg.com/de/tv-heimkino-blu-ray/tv/LG-lcd-tv-42SL8000.jsp
> [2] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=bc42aabc6a01b92b0f961d65671564e0e1cd7592
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=53544
> Signed-off-by: Paul Menzel <paulepanter at users.sourceforge.net>
> Cc: <dri-devel at lists.freedesktop.org>
> Cc: Adam Jackson <ajax at redhat.com>
> Cc: Ian Pilcher <arequipeno at gmail.com>
> Cc: <stable at vger.kernel.org>
> ---
> Same as in previous patch:
> 
> Ian, I did not base this patch on your series, to make it easier to get
> back ported. I can easily rebase it though, so hopefully some maintainer
> can tell me what to do.
> ---
>  drivers/gpu/drm/drm_edid.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index eb452e6..75e252e 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -94,6 +94,9 @@ static struct edid_quirk {
>  	/* Unknown Acer */
>  	{ "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
>  
> +	/* LG SL80 */
> +	{ "GSM", 1, EDID_QUIRK_FORCE_REDUCED_BLANKING },
> +
>  	/* Belinea 10 15 55 */
>  	{ "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
>  	{ "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },

Testing another TV (LG SL80), I had the same problems with, with a T60,
it worked fine [1]. Therefore the problems seems to be something else
and needs further investigation. Please do not commit this patch.


Thanks,

Paul


[3] https://bugs.freedesktop.org/show_bug.cgi?id=53544#c5
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