Re: [RFC][PATCH 2/5 v2] drm/bridge: adv7511: Switch to using drm_kms_helper_hotplug_event()

John Stultz
2016-11-29T17:59:08Z

On Mon, Nov 28, 2016 at 10:50 PM, Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Hi John,
>
> Thank you for the patch.
>
> On Monday 28 Nov 2016 21:04:41 John Stultz wrote:
>> In chasing down a previous issue with EDID probing from calling
>> drm_helper_hpd_irq_event() from irq context, Laurent noticed
>> that the DRM documentation suggests that
>> drm_kms_helper_hotplug_event() should be used instead.
>>
>> Thus this patch replaces drm_helper_hpd_irq_event() with
>> drm_kms_helper_hotplug_event().
>>
>> Cc: David Airlie <airlied@linux.ie>
>> Cc: Archit Taneja <architt@codeaurora.org>
>> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
>> Cc: Lars-Peter Clausen <lars@metafoo.de>
>> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>> Cc: dri-devel@lists.freedesktop.org
>> Signed-off-by: John Stultz <john.stultz@linaro.org>
>> ---
>> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index b38e743..2caca0c
>> 100644
>> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> @@ -406,7 +406,7 @@ static void adv7511_irq_work(struct work_struct *work)
>> {
>> struct adv7511 *adv7511 = container_of(work, struct adv7511,
> irq_work);
>>
>> - drm_helper_hpd_irq_event(adv7511->connector.dev);
>> + drm_kms_helper_hotplug_event(adv7511->connector.dev);
>
> That's nice, but you must first update adv7511->connector.status (and as an
> optimization only call drm_kms_helper_hotplug_event() if the status has
> changed).

Apologies for not seeing that subtlety. Thanks for pointing it out,
I've updated my patch.

thanks
-john