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(), which requires we update the
connector.status entry and only call _hotplug_event() when the
status changes.
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Archit Taneja <architt@xxxxxxxxxxxxxx>
Cc: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Cc: Lars-Peter Clausen <lars@xxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Tested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
v3: Update connector.status value and only call __hotplug_event()
when that status changes, as suggested by Laurent.
v4: Set adv7511->connector.status before calling
adv7511->connector.status, as suggested by Laurent.
---
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index 4fcea44..7b2b5af 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -405,8 +405,22 @@ static bool adv7511_hpd(struct adv7511 *adv7511)
static void adv7511_hpd_work(struct work_struct *work)
{
struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work);
+ enum drm_connector_status status;
+ unsigned int val;
+ int ret;
- drm_helper_hpd_irq_event(adv7511->connector.dev);
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
+ if (ret < 0)
+ status = connector_status_disconnected;
+ else if (val & ADV7511_STATUS_HPD)
+ status = connector_status_connected;
+ else
+ status = connector_status_disconnected;
+
+ if (adv7511->connector.status != status) {
+ adv7511->connector.status = status;
+ drm_kms_helper_hotplug_event(adv7511->connector.dev);
+ }
}
static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
--
2.7.4
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