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[6/7] drm/exynos: Read hpd gpio in is_connected callback

Message ID 1396537864-29291-7-git-send-email-rahul.sharma@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rahul Sharma April 3, 2014, 3:11 p.m. UTC 
From: Sean Paul <seanpaul@chromium.org>

This patch adds a gpio read of hpd during the is_connected
callback. This fixes the case where hdmi is off going into
suspend and the cable is plugged in while suspended. In this
case, the hpd interrupt does not fire and is_connected will
return false.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rahul Sharma <Rahul.Sharma@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c |    2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index b2cbf43..fce2f7b 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1031,6 +1031,8 @@  static enum drm_connector_status hdmi_detect(struct drm_connector *connector,
 {
 	struct hdmi_context *hdata = ctx_from_connector(connector);
 
+	hdata->hpd = gpio_get_value(hdata->hpd_gpio);
+
 	return hdata->hpd ? connector_status_connected :
 			connector_status_disconnected;
 }