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-rw-r--r--drivers/video/exynos/exynos_dp_core.c38
-rw-r--r--drivers/video/exynos/exynos_dp_core.h9
-rw-r--r--drivers/video/exynos/exynos_dp_reg.c38
3 files changed, 71 insertions, 14 deletions
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 617ba9568f0c..ebd914dd7252 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -49,10 +49,6 @@ static int exynos_dp_detect_hpd(struct exynos_dp_device *dp)
{
int timeout_loop = 0;
- exynos_dp_init_hpd(dp);
-
- usleep_range(200, 210);
-
while (exynos_dp_get_plug_in_status(dp) != 0) {
timeout_loop++;
if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
@@ -834,7 +830,32 @@ static irqreturn_t exynos_dp_irq_handler(int irq, void *arg)
{
struct exynos_dp_device *dp = arg;
- dev_err(dp->dev, "exynos_dp_irq_handler\n");
+ enum dp_irq_type irq_type;
+
+ irq_type = exynos_dp_get_irq_type(dp);
+ switch (irq_type) {
+ case DP_IRQ_TYPE_HP_CABLE_IN:
+ dev_dbg(dp->dev, "Received irq - cable in\n");
+ schedule_work(&dp->hotplug_work);
+ exynos_dp_clear_hotplug_interrupts(dp);
+ break;
+ case DP_IRQ_TYPE_HP_CABLE_OUT:
+ dev_dbg(dp->dev, "Received irq - cable out\n");
+ exynos_dp_clear_hotplug_interrupts(dp);
+ break;
+ case DP_IRQ_TYPE_HP_CHANGE:
+ /*
+ * We get these change notifications once in a while, but there
+ * is nothing we can do with them. Just ignore it for now and
+ * only handle cable changes.
+ */
+ dev_dbg(dp->dev, "Received irq - hotplug change; ignoring.\n");
+ exynos_dp_clear_hotplug_interrupts(dp);
+ break;
+ default:
+ dev_err(dp->dev, "Received irq - unknown type!\n");
+ break;
+ }
return IRQ_HANDLED;
}
@@ -847,7 +868,7 @@ static void exynos_dp_hotplug(struct work_struct *work)
ret = exynos_dp_detect_hpd(dp);
if (ret) {
- dev_err(dp->dev, "unable to detect hpd\n");
+ /* Cable has been disconnected, we're done */
return;
}
@@ -1093,7 +1114,6 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
exynos_dp_init_dp(dp);
platform_set_drvdata(pdev, dp);
- schedule_work(&dp->hotplug_work);
return 0;
}
@@ -1103,6 +1123,8 @@ static int __devexit exynos_dp_remove(struct platform_device *pdev)
struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
struct exynos_dp_device *dp = platform_get_drvdata(pdev);
+ disable_irq(dp->irq);
+
if (work_pending(&dp->hotplug_work))
flush_work(&dp->hotplug_work);
@@ -1159,7 +1181,7 @@ static int exynos_dp_resume(struct device *dev)
exynos_dp_init_dp(dp);
- schedule_work(&dp->hotplug_work);
+ enable_irq(dp->irq);
return 0;
}
diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 5ef7135039fa..ef3bb545f9a9 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -13,6 +13,13 @@
#ifndef _EXYNOS_DP_CORE_H
#define _EXYNOS_DP_CORE_H
+enum dp_irq_type {
+ DP_IRQ_TYPE_HP_CABLE_IN,
+ DP_IRQ_TYPE_HP_CABLE_OUT,
+ DP_IRQ_TYPE_HP_CHANGE,
+ DP_IRQ_TYPE_UNKNOWN,
+};
+
struct link_train {
int eq_loop;
int cr_loop[4];
@@ -53,6 +60,8 @@ void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
bool enable);
void exynos_dp_init_analog_func(struct exynos_dp_device *dp);
void exynos_dp_init_hpd(struct exynos_dp_device *dp);
+enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp);
+void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp);
void exynos_dp_reset_aux(struct exynos_dp_device *dp);
void exynos_dp_init_aux(struct exynos_dp_device *dp);
int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp);
diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c
index fc19ef651565..9fb901bcdd59 100644
--- a/drivers/video/exynos/exynos_dp_reg.c
+++ b/drivers/video/exynos/exynos_dp_reg.c
@@ -19,11 +19,11 @@
#include "exynos_dp_core.h"
#include "exynos_dp_reg.h"
-#define COMMON_INT_MASK_1 (0)
-#define COMMON_INT_MASK_2 (0)
-#define COMMON_INT_MASK_3 (0)
-#define COMMON_INT_MASK_4 (0)
-#define INT_STA_MASK (0)
+#define COMMON_INT_MASK_1 0
+#define COMMON_INT_MASK_2 0
+#define COMMON_INT_MASK_3 0
+#define COMMON_INT_MASK_4 (HOTPLUG_CHG | HPD_LOST | PLUG)
+#define INT_STA_MASK INT_HPD
void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable)
{
@@ -324,7 +324,7 @@ void exynos_dp_init_analog_func(struct exynos_dp_device *dp)
writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
}
-void exynos_dp_init_hpd(struct exynos_dp_device *dp)
+void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp)
{
u32 reg;
@@ -333,12 +333,38 @@ void exynos_dp_init_hpd(struct exynos_dp_device *dp)
reg = INT_HPD;
writel(reg, dp->reg_base + EXYNOS_DP_INT_STA);
+}
+
+void exynos_dp_init_hpd(struct exynos_dp_device *dp)
+{
+ u32 reg;
+
+ exynos_dp_clear_hotplug_interrupts(dp);
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
reg &= ~(F_HPD | HPD_CTRL);
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_3);
}
+enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp)
+{
+ u32 reg;
+
+ /* Parse hotplug interrupt status register */
+ reg = readl(dp->reg_base + EXYNOS_DP_COMMON_INT_STA_4);
+
+ if (reg & PLUG)
+ return DP_IRQ_TYPE_HP_CABLE_IN;
+
+ if (reg & HPD_LOST)
+ return DP_IRQ_TYPE_HP_CABLE_OUT;
+
+ if (reg & HOTPLUG_CHG)
+ return DP_IRQ_TYPE_HP_CHANGE;
+
+ return DP_IRQ_TYPE_UNKNOWN;
+}
+
void exynos_dp_reset_aux(struct exynos_dp_device *dp)
{
u32 reg;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-26 23:04:23 +0300