[PATCH v3 1/3] drm/bridge/lontium-lt9611uxc: fix waiting for EDID to become available

[Dmitry Baryshkov]

- Call wake_up() when EDID ready event is received to wake
  wait_event_interruptible_timeout()

- Increase waiting timeout, reading EDID can take longer than 100ms, so
  let's be on a safe side.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge")
---
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c 
b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 0c98d27f84ac..a59e811f1705 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -145,8 +145,10 @@ static irqreturn_t lt9611uxc_irq_thread_handler(int irq, 
void *dev_id)
 
        lt9611uxc_unlock(lt9611uxc);
 
-       if (irq_status & BIT(0))
+       if (irq_status & BIT(0)) {
                lt9611uxc->edid_read = !!(hpd_status & BIT(0));
+               wake_up_all(&lt9611uxc->wq);
+       }
 
        if (irq_status & BIT(1)) {
                if (lt9611uxc->connector.dev)
@@ -465,7 +467,7 @@ static enum drm_connector_status 
lt9611uxc_bridge_detect(struct drm_bridge *brid
 static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
 {
        return wait_event_interruptible_timeout(lt9611uxc->wq, 
lt9611uxc->edid_read,
-                       msecs_to_jiffies(100));
+                       msecs_to_jiffies(500));
 }
 
 static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, 
size_t len)
-- 
2.29.2

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