From: Jeremy Thorpe <jeremyt@chromium.org>
Date: Thu, 2 May 2013 17:36:07 +0000 (-0700)
Subject: CHROMIUM: drm/anx7808: Add cable detection IRQ.
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Flinux.git;a=commitdiff_plain;h=0674b271e938c07e793123df65f4f99f1226f413

CHROMIUM: drm/anx7808: Add cable detection IRQ.

Adds a function that detects when the cable is inserted.

BUG=chrome-os-partner:16196
TEST=Run on spring with verbose logging, plug in cable, and observe
"Detected cable insertion." in the logs.

Change-Id: I9a79e8755b6d4e402bf90d0f355b83762c270969
Signed-off-by: Jeremy Thorpe <jeremyt@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/48757
---

diff --git a/drivers/gpu/drm/bridge/anx7808.c b/drivers/gpu/drm/bridge/anx7808.c
index d994116dc0e4..cd999eeed218 100644
--- a/drivers/gpu/drm/bridge/anx7808.c
+++ b/drivers/gpu/drm/bridge/anx7808.c
@@ -32,6 +32,7 @@ struct anx7808_data {
 	int reset_gpio;
 	int intp_gpio;
 	int cable_det_gpio;
+	int cable_det_irq;
 	struct regulator *vdd_mydp;
 	struct i2c_client *tx_p0;
 	struct i2c_client *tx_p1;
@@ -139,6 +140,13 @@ static int anx7808_chip_located(struct anx7808_data *anx7808)
 	return 0;
 }
 
+static irqreturn_t anx7808_cable_det_isr(int irq, void *data)
+{
+	DRM_INFO("Detected cable insertion.\n");
+
+	return IRQ_HANDLED;
+}
+
 static void anx7808_free_gpios(struct anx7808_data *anx7808)
 {
 	gpio_free(anx7808->cable_det_gpio);
@@ -273,6 +281,23 @@ static int anx7808_probe(struct i2c_client *client,
 	if (ret)
 		goto err_i2c;
 
+	anx7808->cable_det_irq = gpio_to_irq(anx7808->cable_det_gpio);
+	if (anx7808->cable_det_irq < 0) {
+		DRM_ERROR("Failed to get irq: %d\n", anx7808->cable_det_irq);
+		goto err_i2c;
+	}
+
+	ret = devm_request_irq(&client->dev,
+			       anx7808->cable_det_irq,
+			       anx7808_cable_det_isr,
+			       IRQF_TRIGGER_RISING,
+			       "anx7808_cable_det",
+			       anx7808);
+	if (ret < 0) {
+		DRM_ERROR("Failed to request irq: %d\n", ret);
+		goto err_i2c;
+	}
+
 	DRM_INFO("ANX7808 initialization successful.\n");
 
 	return 0;