[PATCH v3 08/14] drm/bridge: analogix_dp: Skip native HPD interrupt ops for GPIO HPD

[Damon Ding <damon.ding@rock-chips.com>]

GPIO HPD does not rely on DP controller internal native HPD interrupts.
Skip native HPD register manipulations to avoid irrelevant operations.

Move the hpd_gpiod guard to its caller so the helper operates purely on
the given bitmask, and mute all native HPD interrupts for GPIO mode.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>

---

Changes in v2:
- Adapt to the newly added IRQF_ONESHOT related commit and expand the
  commit msg.

Changes in v3:
- Reorganize the branch layout for hpd_gpiod check.
- Simplify the commit msg.
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 2 +-
 drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c  | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 287fc16125ef..b92d28546192 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -717,7 +717,7 @@ static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
 	bool hpd_detected;
 
 	irq_type = analogix_dp_get_irq_type(dp);
-	if (irq_type)
+	if (!dp->hpd_gpiod && irq_type)
 		analogix_dp_clear_hotplug_interrupts(dp, irq_type);
 
 	if (!dp->hpd_gpiod && analogix_dp_is_rockchip(dp->plat_data->dev_type))
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index 025da25463a8..af5e5a8ec88d 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -193,6 +193,11 @@ void analogix_dp_config_interrupt(struct analogix_dp_device *dp)
 	writel(0, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
 	writel(0, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
 
+	if (dp->hpd_gpiod) {
+		analogix_dp_mute_hpd_interrupt(dp, HPD_IRQ_ALL);
+		return;
+	}
+
 	/*
 	 * Either HOTPLUG_CHG interrupt or PLUG + HPD_LOST interrupt
 	 * pair can be used to implement hotplug detection.
@@ -415,7 +420,7 @@ void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp, u32 irq
 {
 	u32 reg;
 
-	if (dp->hpd_gpiod || !irq_type)
+	if (!irq_type)
 		return;
 
 	reg = analogix_dp_irq_type_to_common_int_sta4(irq_type);
-- 
2.34.1