前言

本文着重介绍 ADV7533 芯片在高通 msm8909 平台上调通的经验

硬件平台：msm8909

软件平台：Android5.0 Android8.0 (均已经调通)

芯片IC：ADV7533

功能实现：MIPI 转HDMI

简介：

ADV7533 是一款能够将标准MIPI信号转换为HDMI 信号的转换芯片。

即从msm8909的主控端信号，转换成HDMI信号后输出到HDMI 显示器上。

即原本输出到LCD的mipi信号，去连接到ADV7533 芯片上，然后输出到HDMI接口。

有以下几个特点：

MIPI 接收特性

支持2、3、4 lane

支持 MIPI输入16bit、24bit(默认)、30bit、

最大速率，800Mz *4 lane

控制接口

IIC

HDMI标准

HDMI v1.3 标准，兼容V1.0

Audio

逻辑电平 1.8V – 3.3V

音频输出、输出转换(默认不用)

热插拔支持

利用中断实现HDMI热插拔检测(默认不用)

最终效果：

从企鹅Logo开始显示，到开机动画、桌面、息屏唤醒都显示正常。和接普通的MIPI LCD屏幕显示一样。

注意点：

LK 需要配置IIC 和初始化ADV7533

MIPI时钟全程使用高速模式

使用时钟连续模式

1. 总体修改流程

先在项目基础上适配新的一套LCD的驱动，或者在默认的LCD驱动上修改参数配置。

去除多余的 init-code 参数，只保留退出休眠、开启显示，进入休眠、关闭显示的参数。

适当调整前后肩参数及相关的 Timing 参数

增加LK和kernel的ADV7533 驱动

设置mipi时钟为高速模式

设置mipi时钟为连续模式

这里的配置流程为，在正常的新增一套LCD驱动流程的基础上。在LK和Kernel分别配置IIC + ADV7533 驱动。以这里新增lcd 驱动名字为rm68200为例，进行讲述。

2. LK 修改

主要包含3部分

适配LK LCD驱动

配置LK IIC

增加LK ADV 7533 驱动

2.1 适配 lcd 驱动

配置lcd 控制宏

+#Begin: add by leo for RM68200_720P & adv7533
+LCD_RM68200_720P_SUPPORT_PROJECTS := N1
+ifneq ($(filter $(TARGET_PRODUCT),  $(LCD_RM68200_720P_SUPPORT_PROJECTS)),)
+  DEFINES += FEATURE_XXX_LCD_RM68200_720P_SUPPORT=1
+endif
+#End: add by leo for RM68200_720P & adv7533

修改LK lcd驱动加载(这里也包含了lk的adv7533驱动的头文件，要引用adv7533的入口函数)

包含lcd和adv7533的头文件

bootable/bootloader/lk/target/msm8909/oem_panel.c
+#if FEATURE_XXX_LCD_RM68200_720P_SUPPORT
+#include "include/panel_rm68200_720p_video.h"
+#include "include/mipi_adv7533_dsi2hdmi.h"
+#endif

配置 lcd的 ID 枚举变量

@@ -148,6 +153,9 @@ enum {
 #endif
 #if DSI2DPI_TC358762
 	ST7789V_VIDEO_PANEL,
+#endif
+#if FEATURE_XXX_LCD_RM68200_720P_SUPPORT
+	RM68200_720P_VIDEO_PANEL_XXX,
 #endif
 	UNKNOWN_PANEL
 };

声明adv7533 入口函数

+#if FEATURE_XXX_LCD_RM68200_720P_SUPPORT
+extern int adv7533_init(void);
+#endif

根据项目，指定lcd id，选择lcd 驱动

@@ -337,8 +349,43 @@ static int init_panel_data(struct panel_struct *panelstruct,
 	panel_id = ST101XBJ05_720P_VIDEO_PANEL_XXX;
 #endif
 
+
+#if FEATURE_XXX_LCD_RM68200_720P_SUPPORT
+	panel_id = RM68200_720P_VIDEO_PANEL_XXX;
+	dprintf(CRITICAL, "select RM68200 720P \n");
+#endif
+

配置 lcd 属性参数和加入ADV7533驱动的入口函数

+#if FEATURE_XXX_LCD_RM68200_720P_SUPPORT
+		case RM68200_720P_VIDEO_PANEL_XXX:
+			panelstruct->paneldata	  = &rm68200_720p_video_panel_data;
+			panelstruct->panelres	  = &rm68200_720p_video_panel_res;
+			panelstruct->color		  = &rm68200_720p_video_color;
+			panelstruct->videopanel   = &rm68200_720p_video_panel;
+			panelstruct->commandpanel = &rm68200_720p_video_command_panel;
+			panelstruct->state		  = &rm68200_720p_video_state;
+			panelstruct->laneconfig   = &rm68200_720p_video_lane_config;
+			panelstruct->paneltiminginfo
+								= &rm68200_720p_video_timing_info;
+			panelstruct->panelresetseq
+								= &rm68200_720p_video_reset_seq;
+			panelstruct->backlightinfo
+								= &rm68200_720p_video_backlight;
+			pinfo->mipi.panel_on_cmds
+								= rm68200_720p_video_on_command;
+			pinfo->mipi.num_of_panel_on_cmds
+								= RM68200_720P_VIDEO_ON_COMMAND;
+			memcpy(phy_db->timing,
+								rm68200_720p_video_timings, TIMING_SIZE);
+			if (adv7533_init() < 0) {
+				dprintf(CRITICAL, "%s leo adv7533_init failed  \n", __func__);
+				break;
+			}
+		break;
+#endif

2.2 配置LK IIC

参考文档和博客

80-nu767-1_h_linux_bam_low-speed_peripherals_configuration_and_debug_guide.pdf

https://blog.csdn.net/eliot_shao/article/details/53351759

更详细的内容，参考我的上一篇博客

https://blog.csdn.net/FANG_YISHAO/article/details/113180983

配置过程略过

2.3 增加ADV7533驱动

增加 mipi_adv7533_dsi2hdmi.c 到 bootable/bootloader/lk/dev/gcdb/display/

增加 mipi_adv7533_dsi2hdmi.h 到bootable/bootloader/lk/dev/gcdb/display/include/

配置 mk编译驱动文件

bootable/bootloader/lk/dev/gcdb/display/rules.mk
@@ -6,7 +6,8 @@ OBJS += \
     $(LOCAL_DIR)/gcdb_display.o \
     $(LOCAL_DIR)/gcdb_display_param.o \
     $(LOCAL_DIR)/panel_display.o \
-    $(LOCAL_DIR)/gcdb_autopll.o
+    $(LOCAL_DIR)/gcdb_autopll.o \
+    $(LOCAL_DIR)/mipi_adv7533_dsi2hdmi.o

附件略过

3. Kernel 修改

也是主要包含3部分

适配Kernel LCD驱动

配置Kernel IIC 节点

增加Kernel ADV 7533 驱动

3.1 适配Kernel LCD驱动

包含 lcd 驱动头文件

kernel/msm-3.18/arch/arm/boot/dts/xxx/XXX_msm8909-qrd-skue.dtsi
+#include "dsi-panel-rm68200_720p_video.dtsi"

新增 lcd 驱动节点，并修改为默认的lcd 加载选项。

(这里客户的主板修改了lcd的rst引脚控制，由于不是重点，略过描述)


+#if 1
+&dsi_rm68200_720p_video {
+	qcom,panel-supply-entries = <&dsi_panel_pwr_supply>;
+	qcom,cont-splash-enabled;
+};
+#endif
+
 &mdss_dsi0 {
-	qcom,dsi-pref-prim-pan = <&dsi_nt35521_720p_vid>;
+	qcom,dsi-pref-prim-pan = <&dsi_rm68200_720p_video>;
 	pinctrl-names = "mdss_default", "mdss_sleep";
 	pinctrl-0 = <&mdss_dsi_active &mdss_te_active>;
 	pinctrl-1 = <&mdss_dsi_suspend &mdss_te_suspend>;
 
-	qcom,platform-reset-gpio = <&msm_gpio 25 0>;
+	qcom,platform-reset-gpio = <&msm_gpio 8 0>;
 };

3.2 配置 Kernel IIC 节点

由前面客户主板原理图得知，IIC 是 gpio10、gpio11，qup 地址为78ba000。

从硬件设计和gpio功能描述，gpio10、gpio11，默认配置为SPI0，需要屏蔽掉SPI的功能配置，修改为IIC-6的功能配置。

主要包含两方面

屏蔽SPI0 配置节点，新增IIC-6 配置节点

屏蔽SPI0 pinctrl 配置，新增IIC-6 pinctrl 配置

添加 ADV7533 从设备节点

屏蔽SPI0 配置节点

kernel/msm-3.18/arch/arm/boot/dts/XXX/xxx_msm8909.dtsi
@@ -42,10 +42,11 @@
-		spi0 = &spi_0; /* SPI0 controller device */
+	//	spi0 = &spi_0; /* SPI0 controller device */
+		i2c6 = &i2c_6; /* I2c6 cntroller device for addr7533 */

新增IIC-6 配置节点

+	i2c_6: i2c@78ba000 { /* BLSP1 QUP6 */
+		compatible = "qcom,i2c-msm-v2";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg-names = "qup_phys_addr";
+		reg = <0x78ba000 0x1000>;
+		interrupt-names = "qup_irq";
+		interrupts = <0 100 0>;
+		clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>,
+			<&clock_gcc clk_gcc_blsp1_qup6_i2c_apps_clk>;
+		clock-names = "iface_clk", "core_clk";
+		qcom,clk-freq-out = <100000>;
+		qcom,clk-freq-in  = <19200000>;
+		pinctrl-names = "i2c_active", "i2c_sleep";
+		pinctrl-0 = <&i2c_6_active>;
+		pinctrl-1 = <&i2c_6_sleep>;
+		qcom,noise-rjct-scl = <0>;
+		qcom,noise-rjct-sda = <0>;
+		dmas = <&dma_blsp1 14 64 0x20000020 0x20>,
+			<&dma_blsp1 15 32 0x20000020 0x20>;
+		dma-names = "tx", "rx";
+		qcom,master-id = <86>;
+	};

然后，屏蔽SPI-0的pinctrl配置，新增IIC-6的pinctrl配置

+#if 0
 		spi0 {
 			spi0_default: spi0_default {
 				mux {
@@ -431,6 +433,7 @@
 				};
 			};
 		};
+#endif

+#if 1
+		pmx_i2c_6 {
+			i2c_6_active: i2c_6_active {
+				mux {
+					pins = "gpio11", "gpio10";
+					function = "blsp_i2c6";
+				};
+				config {
+					pins = "gpio11", "gpio10";
+					drive-strength = <2>; /* 2 MA */
+					bias-disable; /* No PULL */
+				};
+			};
+			i2c_6_sleep: i2c_6_sleep {
+				mux {
+					pins = "gpio11", "gpio10";
+					function = "blsp_i2c6";
+				};
+				config {
+					pins = "gpio11", "gpio10";
+					drive-strength = <2>; /* 2 MA */
+					bias-disable; /* No PULL */
+				};
+			};	
+		};
+#endif

添加 ADV7533 i2C 从设备节点

+#if 1
+	i2c@78ba000 {
+		adv7533@39 {
+			compatible = "adv,adv7533";
+			reg = <0x39>;
+			adv7533,main-addr = <0x39>;
+			adv7533,cec-dsi-addr = <0x3C>;
+			adv7533,video-mode = <2>;
+			qcom,hdmi-pwr-en = <&msm_gpio 3 0x0>;
+			vdd-supply = <&pm8909_l17>;
+			vcc_i2c-supply = <&pm8909_l6>;
+		};
+	};
+#endif

4. ADV7533 驱动流程详解

前言： ADV7533的驱动无论是在LK 还是Kernle，基本套路都是一样的。都是获取配置基本的gpio脚，用于上电控制(gpio控制外部ldo上电)，中断配置(这里不用)。

然后写入需要的寄存器配置，只要输入符合格式的mipi信号，就能成功转换出HDMI 信号。

4.1 入口函数

入口函数

int adv7533_init(void)
{
	int rev = -1;
	int soc_ver = board_soc_version();

	// soc_ver shoudle <= BOARD_SOC_VERSION2
	dprintf(CRITICAL, "Enter %s soc_ver 0x%x\n", __func__, soc_ver);
	mdelay(5);

#if 1
	// config adv7533
	adv7533_hw_config();

	// config i2c-6
	i2c6_dev = qup_blsp_i2c_init(BLSP_ID_1, QUP_ID_5, 100000, 19200000);
	mdelay(1200);
	if (!i2c6_dev) {
		dprintf(CRITICAL, "%s Failed to init i2c-6 \n", __func__);
		return -1;
	}
#endif

	// read adv7533 test
	rev = adv7533_read_test();
	if (rev < 0) {
		dprintf(CRITICAL, "adv7533_read_test faile, exit \n");
		return rev;
	}

	// init adv7533 reg
	rev = adv7533_write_init_config();
	if (rev < 0) {
		dprintf(CRITICAL, "adv7533_write_init_config faile, exit \n");
		return rev;
	}

#if DUMP_ADV7533_REG
	dump_adv7533_registers();
#endif

	return 0;
}

4.2 驱动流程

主要包含几部分：

硬件配置函数

申请配置IIC

读ADV7533从设备测试

初始化ADV7533

4.2.1 硬件配置函数

static void adv7533_hw_config(void)
{
	dprintf(CRITICAL, "%s leo enter \n", __func__);

	// enable vdd and i2c-supply
	regulator_enable(REG_LDO2 | REG_LDO6 | REG_LDO17);
	mdelay(5);

	// enable adv7533 power
	gpio_tlmm_config(3, 0, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA, GPIO_DISABLE);
	mdelay(5);
	gpio_set(3, GPIO_STATE_HIGH);
	mdelay(10);
}

分析：

LDO2、6、17 是lk 阶段，lcd 的相关的ldo 上电配置，这里直接先配置好。

gpio_3 是ADV7533 的外部上电控制，需要先上电

gpio_3 控制ADV7533 上电，如图：

4.2.2 申请配置IIC

略过

4.2.3 读从设备测试

略过

4.2.4 写入初始化参数

略过

4.3 注意事项

ADV7533 需要全程保持时钟高速

ADV7533 需要配置MIPI 信号为连续模式

ADV7533 需要全程保持时钟高速

bootable\bootloader\lk\dev\gcdb\display\include\panel_rm68200_720p_video.h

设置 lane_config 参数，配置 mipi clk hs 模式

/*---------------------------------------------------------------------------*/
/* Lane configuration                                                        */
/*---------------------------------------------------------------------------*/
static struct lane_configuration rm68200_720p_video_lane_config = {
	3, 0, 1, 1, 1, 0, 1
};

lane_configuration 定义

struct lane_configuration {
	uint8_t dsi_lanes;
	uint8_t dsi_lanemap;
	uint8_t lane0_state;
	uint8_t lane1_state;
	uint8_t lane2_state;
	uint8_t lane3_state;
	uint8_t force_clk_lane_hs;
};

ADV7533 需要配置MIPI 信号为连续模式

bootable\bootloader\lk\dev\gcdb\display\include\panel_rm68200_720p_video.h

traffic_mode; 配置为0，即为连续模式

/*---------------------------------------------------------------------------*/
/* Video mode panel information                     */
/*---------------------------------------------------------------------------*/
static struct videopanel_info rm68200_720p_video_panel = {
	1, 0, 0, 0, 1, 1, 0, 0, 0x9
};

videopanel_info 定义

struct videopanel_info {
	uint8_t hsync_pulse;
	uint8_t hfp_power_mode;
	uint8_t hbp_power_mode;
	uint8_t hsa_power_mode;
	uint8_t bllp_eof_power_mode;
	uint8_t bllp_power_mode;
	uint8_t traffic_mode;
	uint8_t dma_delayafter_vsync;
	uint32_t  bllp_eof_power;
};

bootable\bootloader\lk\platform\msm_shared\include\mipi_dsi.h

#define DSI_NON_BURST_SYNCH_PULSE   0
#define DSI_NON_BURST_SYNCH_EVENT   1
#define DSI_BURST_MODE              2

因此，同理。LCD Kernel 驱动也要配置这两项。

kernel\msm-3.18\arch\arm\boot\dts\XXX\dsi-panel-rm68200_720p_video.dtsi

	qcom,mdss-dsi-traffic-mode = "non_burst_sync_pulse";
	qcom,mdss-dsi-force-clock-lane-hs;

4.3.1 MIPI traffic_mode

Kernel 中的定义

kernel\msm-3.18\drivers\video\msm\mdss\mdss_dsi.h

#define DSI_NON_BURST_SYNCH_PULSE   0
#define DSI_NON_BURST_SYNCH_EVENT   1
#define DSI_BURST_MODE              2

高通平台调试 ADV7533

前言