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authorRussell King <rmk+kernel@armlinux.org.uk>2016-11-03 08:58:04 +0000
committerRussell King <rmk+kernel@armlinux.org.uk>2016-11-18 00:00:40 +0000
commitae81553c30ef86305048fcac379b8b16b71d3099 (patch)
tree8e685221bacaa08a2d56bf371e9aced6edc97d0a /drivers/gpu/drm/i2c
parent9476ed2e3883b11da1c8065e6d5a1785cae35588 (diff)
downloadlinux-ae81553c30ef86305048fcac379b8b16b71d3099.tar.bz2
drm/i2c: tda998x: allow interrupt to be shared
Some TDA998x contain several different I2C devices - there is the HDMI encoder, and there is a TDA9950 CEC engine. These two share the same interrupt signal. In order to allow a driver for the CEC engine to work, we need to be able to share the interrupt with the CEC driver, so convert the handler and registration to allow this to happen. Tested-by: Brian Starkey <brian.starkey@arm.com> Reviewed-by: Brian Starkey <brian.starkey@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers/gpu/drm/i2c')
-rw-r--r--drivers/gpu/drm/i2c/tda998x_drv.c52
1 files changed, 27 insertions, 25 deletions
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 5a97444798d3..5063371e1e08 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -634,28 +634,30 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
bool handled = false;
sta = cec_read(priv, REG_CEC_INTSTATUS);
- cec = cec_read(priv, REG_CEC_RXSHPDINT);
- lvl = cec_read(priv, REG_CEC_RXSHPDLEV);
- flag0 = reg_read(priv, REG_INT_FLAGS_0);
- flag1 = reg_read(priv, REG_INT_FLAGS_1);
- flag2 = reg_read(priv, REG_INT_FLAGS_2);
- DRM_DEBUG_DRIVER(
- "tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n",
- sta, cec, lvl, flag0, flag1, flag2);
-
- if (cec & CEC_RXSHPDINT_HPD) {
- if (lvl & CEC_RXSHPDLEV_HPD)
- tda998x_edid_delay_start(priv);
- else
- schedule_work(&priv->detect_work);
-
- handled = true;
- }
+ if (sta & CEC_INTSTATUS_HDMI) {
+ cec = cec_read(priv, REG_CEC_RXSHPDINT);
+ lvl = cec_read(priv, REG_CEC_RXSHPDLEV);
+ flag0 = reg_read(priv, REG_INT_FLAGS_0);
+ flag1 = reg_read(priv, REG_INT_FLAGS_1);
+ flag2 = reg_read(priv, REG_INT_FLAGS_2);
+ DRM_DEBUG_DRIVER(
+ "tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n",
+ sta, cec, lvl, flag0, flag1, flag2);
+
+ if (cec & CEC_RXSHPDINT_HPD) {
+ if (lvl & CEC_RXSHPDLEV_HPD)
+ tda998x_edid_delay_start(priv);
+ else
+ schedule_work(&priv->detect_work);
+
+ handled = true;
+ }
- if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) {
- priv->wq_edid_wait = 0;
- wake_up(&priv->wq_edid);
- handled = true;
+ if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) {
+ priv->wq_edid_wait = 0;
+ wake_up(&priv->wq_edid);
+ handled = true;
+ }
}
return IRQ_RETVAL(handled);
@@ -1544,7 +1546,7 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
/* initialize the optional IRQ */
if (client->irq) {
- int irqf_trigger;
+ unsigned long irq_flags;
/* init read EDID waitqueue and HDP work */
init_waitqueue_head(&priv->wq_edid);
@@ -1554,11 +1556,11 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
reg_read(priv, REG_INT_FLAGS_1);
reg_read(priv, REG_INT_FLAGS_2);
- irqf_trigger =
+ irq_flags =
irqd_get_trigger_type(irq_get_irq_data(client->irq));
+ irq_flags |= IRQF_SHARED | IRQF_ONESHOT;
ret = request_threaded_irq(client->irq, NULL,
- tda998x_irq_thread,
- irqf_trigger | IRQF_ONESHOT,
+ tda998x_irq_thread, irq_flags,
"tda998x", priv);
if (ret) {
dev_err(&client->dev,