#include <linux/device.h>
#include <linux/io.h>
#include <linux/delay.h>
+#include <linux/gpio.h>
#include "exynos_dp_core.h"
#include "exynos_dp_reg.h"
{
u32 reg;
+ if (gpio_is_valid(dp->hpd_gpio))
+ return;
+
reg = HOTPLUG_CHG | HPD_LOST | PLUG;
writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_4);
{
u32 reg;
+ if (gpio_is_valid(dp->hpd_gpio))
+ return;
+
exynos_dp_clear_hotplug_interrupts(dp);
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
{
u32 reg;
- /* Parse hotplug interrupt status register */
- reg = readl(dp->reg_base + EXYNOS_DP_COMMON_INT_STA_4);
+ if (gpio_is_valid(dp->hpd_gpio)) {
+ reg = gpio_get_value(dp->hpd_gpio);
+ if (reg)
+ return DP_IRQ_TYPE_HP_CABLE_IN;
+ else
+ return DP_IRQ_TYPE_HP_CABLE_OUT;
+ } else {
+ /* 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 & PLUG)
+ return DP_IRQ_TYPE_HP_CABLE_IN;
- if (reg & HPD_LOST)
- return DP_IRQ_TYPE_HP_CABLE_OUT;
+ if (reg & HPD_LOST)
+ return DP_IRQ_TYPE_HP_CABLE_OUT;
- if (reg & HOTPLUG_CHG)
- return DP_IRQ_TYPE_HP_CHANGE;
+ if (reg & HOTPLUG_CHG)
+ return DP_IRQ_TYPE_HP_CHANGE;
- return DP_IRQ_TYPE_UNKNOWN;
+ return DP_IRQ_TYPE_UNKNOWN;
+ }
}
void exynos_dp_reset_aux(struct exynos_dp_device *dp)
/* Disable AUX transaction H/W retry */
reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3) | AUX_HW_RETRY_COUNT_SEL(0)|
AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
- writel(reg, dp->reg_base + EXYNOS_DP_AUX_HW_RETRY_CTL) ;
+ writel(reg, dp->reg_base + EXYNOS_DP_AUX_HW_RETRY_CTL);
/* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
reg = DEFER_CTRL_EN | DEFER_COUNT(1);
{
u32 reg;
- reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
- if (reg & HPD_STATUS)
- return 0;
+ if (gpio_is_valid(dp->hpd_gpio)) {
+ if (gpio_get_value(dp->hpd_gpio))
+ return 0;
+ } else {
+ reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
+ if (reg & HPD_STATUS)
+ return 0;
+ }
return -EINVAL;
}