diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_dp_reg.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_dp_reg.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_dp_reg.c b/drivers/gpu/drm/exynos/exynos_dp_reg.c index b70da5052ff0..c1f87a2a9284 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_reg.c +++ b/drivers/gpu/drm/exynos/exynos_dp_reg.c @@ -13,6 +13,7 @@ #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" @@ -326,6 +327,9 @@ void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp) { 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); @@ -337,6 +341,9 @@ void exynos_dp_init_hpd(struct exynos_dp_device *dp) { 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); @@ -348,19 +355,27 @@ 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 (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) @@ -386,7 +401,7 @@ void exynos_dp_init_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); @@ -402,9 +417,14 @@ int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp) { 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; } |