[PATCH 2/3] drm: reset ELD if NULL edid is passed to drm_edid_to_eld

[Jani Nikula]

On Thu, 16 Feb 2017, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
> On Thu, Feb 16, 2017 at 12:36:43PM +0200, Jani Nikula wrote:
>> Make the function useful for resetting, not just setting, the ELD.
>> 
>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>> ---
>>  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 24e7b282f16c..362036360724 100644
>> --- a/drivers/gpu/drm/drm_edid.c
>> +++ b/drivers/gpu/drm/drm_edid.c
>> @@ -3430,6 +3430,9 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
>>  
>>  	memset(eld, 0, sizeof(connector->eld));
>>  
>> +	if (!edid)
>> +		return;
>> +
>>  	connector->latency_present[0] = false;
>>  	connector->latency_present[1] = false;
>>  	connector->video_latency[0] = 0;
>
> /me thinks the check should be after all these.

D'oh!

> Hmm. Actually the cea ext block check below should be safe wrt.
> edid==NULL, so not sure we need this at all.

I'd just like to be explicit and avoid the debug message on missing CEA
extensions if the whole EDID is missing.

BR,
Jani.



-- 
Jani Nikula, Intel Open Source Technology Center