From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径

---
 kernel/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c |   90 +++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 86 insertions(+), 4 deletions(-)

diff --git a/kernel/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c b/kernel/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c
index 1d1efd7..dac427b 100644
--- a/kernel/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c
+++ b/kernel/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c
@@ -27,6 +27,8 @@
  * Pre-requisites: headers required by header of this unit
  */
 
+#include <linux/slab.h>
+
 #include "dm_services.h"
 
 #include "include/gpio_interface.h"
@@ -61,14 +63,18 @@
 	enum gpio_mode mode)
 {
 	if (gpio->pin) {
-		ASSERT_CRITICAL(false);
+		BREAK_TO_DEBUGGER();
 		return GPIO_RESULT_ALREADY_OPENED;
 	}
 
+	// No action if allocation failed during gpio construct
+	if (!gpio->hw_container.ddc) {
+		BREAK_TO_DEBUGGER();
+		return GPIO_RESULT_NON_SPECIFIC_ERROR;
+	}
 	gpio->mode = mode;
 
-	return dal_gpio_service_open(
-		gpio->service, gpio->id, gpio->en, mode, &gpio->pin);
+	return dal_gpio_service_open(gpio);
 }
 
 enum gpio_result dal_gpio_get_value(
@@ -99,6 +105,18 @@
 	const struct gpio *gpio)
 {
 	return gpio->mode;
+}
+
+enum gpio_result dal_gpio_lock_pin(
+	struct gpio *gpio)
+{
+	return dal_gpio_service_lock(gpio->service, gpio->id, gpio->en);
+}
+
+enum gpio_result dal_gpio_unlock_pin(
+	struct gpio *gpio)
+{
+	return dal_gpio_service_unlock(gpio->service, gpio->id, gpio->en);
 }
 
 enum gpio_result dal_gpio_change_mode(
@@ -217,6 +235,21 @@
 	return gpio->output_state;
 }
 
+struct hw_ddc *dal_gpio_get_ddc(struct gpio *gpio)
+{
+	return gpio->hw_container.ddc;
+}
+
+struct hw_hpd *dal_gpio_get_hpd(struct gpio *gpio)
+{
+	return gpio->hw_container.hpd;
+}
+
+struct hw_generic *dal_gpio_get_generic(struct gpio *gpio)
+{
+	return gpio->hw_container.generic;
+}
+
 void dal_gpio_close(
 	struct gpio *gpio)
 {
@@ -253,6 +286,30 @@
 	gpio->mode = GPIO_MODE_UNKNOWN;
 	gpio->output_state = output_state;
 
+	//initialize hw_container union based on id
+	switch (gpio->id) {
+	case GPIO_ID_DDC_DATA:
+		gpio->service->factory.funcs->init_ddc_data(&gpio->hw_container.ddc, service->ctx, id, en);
+		break;
+	case GPIO_ID_DDC_CLOCK:
+		gpio->service->factory.funcs->init_ddc_data(&gpio->hw_container.ddc, service->ctx, id, en);
+		break;
+	case GPIO_ID_GENERIC:
+		gpio->service->factory.funcs->init_generic(&gpio->hw_container.generic, service->ctx, id, en);
+		break;
+	case GPIO_ID_HPD:
+		gpio->service->factory.funcs->init_hpd(&gpio->hw_container.hpd, service->ctx, id, en);
+		break;
+	// TODO: currently gpio for sync and gsl does not get created, might need it later
+	case GPIO_ID_SYNC:
+		break;
+	case GPIO_ID_GSL:
+		break;
+	default:
+		ASSERT_CRITICAL(false);
+		gpio->pin = NULL;
+	}
+
 	return gpio;
 }
 
@@ -264,7 +321,32 @@
 		return;
 	}
 
-	dal_gpio_close(*gpio);
+	switch ((*gpio)->id) {
+	case GPIO_ID_DDC_DATA:
+		kfree((*gpio)->hw_container.ddc);
+		(*gpio)->hw_container.ddc = NULL;
+		break;
+	case GPIO_ID_DDC_CLOCK:
+		//TODO: might want to change it to init_ddc_clock
+		kfree((*gpio)->hw_container.ddc);
+		(*gpio)->hw_container.ddc = NULL;
+		break;
+	case GPIO_ID_GENERIC:
+		kfree((*gpio)->hw_container.generic);
+		(*gpio)->hw_container.generic = NULL;
+		break;
+	case GPIO_ID_HPD:
+		kfree((*gpio)->hw_container.hpd);
+		(*gpio)->hw_container.hpd = NULL;
+		break;
+	// TODO: currently gpio for sync and gsl does not get created, might need it later
+	case GPIO_ID_SYNC:
+		break;
+	case GPIO_ID_GSL:
+		break;
+	default:
+		break;
+	}
 
 	kfree(*gpio);
 

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