主要代碼:
LINUX\android\kernel\arch\arm\boot\dts\qcom\dsi-panel-trust-hx8379c-fwvga-video.dtsi
LINUX\android\kernel\arch\arm\boot\dts\qcom\msm8916-qrd-skum.dtsi
LINUX/android/bootable/bootloader/lk/dev/pmic/pm8x41/pm8x41_adc.c
LINUX/android/bootable/bootloader/lk/dev/pmic/pm8x41/include/pm8x41_adc.h
LINUX/android/bootable/bootloader/lk/target/msm8916/include/target/display.h
LINUX/android/bootable/bootloader/lk/target/msm8916/init.c
LINUX\android\bootable\bootloader\lk\dev\gcdb\display\include\panel_trust_hx8379c_fwvga_video.h
\\192.168.142.144\chenhaibing\MSM8916_R113502NEW\LINUX\android\bootable\bootloader\lk\target\msm8916\oem_panel.c
1.Lk :
Adc 兼容
android/bootable/bootloader/lk/dev/pmic/pm8x41/include/pm8x41_adc.h
#defineMPP_2_CHAN_ID 33//chenhaibing 20140925 定義相應的adc通道
voidpm8x41_enable_mpp_as_adc_for_mpp2(uint16_tmpp_num);//chenhaibing 20140925 add for lcm adc
android/bootable/bootloader/lk/dev/pmic/pm8x41/pm8x41_adc.c
Static struct adc_conf adc_data[]={ CHAN_INIT(VADC_USR1_BASE,VADC_BAT_CHAN_ID,VADC_MODE_NORMAL,VADC_DECIM_RATIO_VAL,HW_SET_DELAY_100US,FAST_AVG_SAMP_1,CALIB_RATIO),CHAN_INIT(VADC_USR1_BASE,VADC_BAT_VOL_CHAN_ID,VADC_MODE_NORMAL,VADC_DECIM_RATIO_VAL,HW_SET_DELAY_100US,FAST_AVG_SAMP_1,CALIB_ABS),CHAN_INIT(VADC_USR1_BASE, MPP_2_CHAN_ID,VADC_MODE_NORMAL,VADC_DECIM_RATIO_VAL,HW_SET_DELA
Y_100US,FAST_AVG_SAMP_1,CALIB_ABS),
添加到adc_data初始化數組
讀adc數據前,需要使能此接口
/*begin:add by chenhaibing for pm8x41 mpp2 adc enable 20140925*/
voidpm8x41_enable_mpp_as_adc_for_mpp2(uint16_tmpp_num)
{ uint32_tval;
if(mpp_num >MPP_MAX_NUM)
{dprintf(CRITICAL,"Error: The MPP pin number is unavailable\n");
return;}
/* set the MPP mode as AIN */
val =(MPP_MODE_AIN <<Q_REG_MODE_SEL_SHIFT)\ |(0x1<<Q_REG_OUT_INVERT_SHIFT)\ |(0x0<<Q_REG_SRC_SEL_SHIFT);
REG_WRITE((MPP_REG_BASE +mpp_num *MPP_REG_RANGE +Q_REG_MODE_CTL),val);
/* Enable the MPP */
val =(MPP_MASTER_ENABLE <<Q_REG_MASTER_EN_SHIFT);
REG_WRITE((MPP_REG_BASE +mpp_num *MPP_REG_RANGE +Q_REG_EN_CTL),val);
/* AIN route to AMUX8 */
val =(0x1<<Q_REG_AIN_ROUTE_SHIFT);//AMUX1
REG_WRITE((MPP_REG_BASE +mpp_num *MPP_REG_RANGE +Q_REG_AIN_CTL),val);
}
android/bootable/bootloader/lk/target/msm8916/oem_panel.c
#include"include/panel_trust_hx8379c_fwvga_video.h"//chenhaibing add 0923
主要接口:
oem_panel_select: 主要是根據adc判斷lcd兼容
pm8x41_enable_mpp_as_adc_for_mpp2(0x01);
lcm_type =get_vendor_from_adc(MPP_2_CHAN_ID);
if(LCM_TYPE_HS==lcm_type)
{
panel_id =ILI9806E_FWVGA_VIDEO_PANEL;//chenhaibing add
}
elseif(LCM_TYPE_TS==lcm_type)
{
panel_id =HX8379C_FWVGA_VIDEO_PANEL;
}
Else
{
panel_id =UNKNOWN_PANEL;
ret =false;
Return ret;
}
oem_panel_on負責把.h相關宏和指令,時序設置等，根據oem_panel_select:指定的panel_id給屏驅動所使用的結構體。
kernel篇.
Panel id 會通過command line的方式傳遞到kernel層, kernel video mdss驅動會通過調用dtsi相關節點信息進行訪問，使得lcm被正常驅動。
dtsi相關節點信息:
時序設置:
qcom,mdss-dsi-panel-timings = [4D 1A 12 00 40 42 16 1E 14 03 04 00];
80-NH713-1_DSI_TIMING_PARAMETERS_USER_INTERACTIVE_SPREADSHEET.xlsm
DSI and MDP registers sheet 頁寫入下面信息:
frame rate ,lane config,pixel format BPP,Active Width,Active Height
Hsync Pulse Width,Hori. Back Porch,Hori. Front Porch,Vsync Pulse Width,Vert. Back Porch,Vert. Front Porch
拷貝下面的值填入上面數組。
2. DSI PHY registers
PHY Registers value in hex
DSIPHY_TIMING_CTRL_0 #VALUE!
DSIPHY_TIMING_CTRL_1 1A
DSIPHY_TIMING_CTRL_2 12
DSIPHY_TIMING_CTRL_3 0
DSIPHY_TIMING_CTRL_4 40
DSIPHY_TIMING_CTRL_5 42
DSIPHY_TIMING_CTRL_6 16
DSIPHY_TIMING_CTRL_7 1E
DSIPHY_TIMING_CTRL_8 14
DSIPHY_TIMING_CTRL_9 3
DSIPHY_TIMING_CTRL_10 4
ESD:
qcom,mdss-dsi-panel-status-command = [06 01 00 01 05 00 02 09 08];
qcom,mdss-dsi-panel-status-command-state = "dsi_lp_mode";
qcom,mdss-dsi-panel-status-check-mode = "reg_read";
qcom,mdss-dsi-panel-status-value = <0x90>;
qcom,esd-check-enabled;
比如：
若需要返回多個參數，需要改寫代碼:
Mdss_dsi_host.c
static int mdss_dsi_read_status(struct mdss_dsi_ctrl_pdata *ctrl)
{
struct dcs_cmd_req cmdreq;
memset(&cmdreq, 0, sizeof(cmdreq));
cmdreq.cmds = ctrl->status_cmds.cmds;
cmdreq.cmds_cnt = ctrl->status_cmds.cmd_cnt;
cmdreq.flags = CMD_REQ_COMMIT | CMD_CLK_CTRL | CMD_REQ_RX;
cmdreq.rlen =0;
cmdreq.cb = NULL;
cmdreq.rbuf = ctrl->status_buf.data;
return mdss_dsi_cmdlist_put(ctrl, &cmdreq);
}
/*begin: add by chenhaibing for hx8379c read status 20141021*/
static int mdss_dsi_read_status_for_trust(struct mdss_dsi_ctrl_pdata *ctrl)
{
struct dcs_cmd_req cmdreq;
memset(&cmdreq, 0, sizeof(cmdreq));
cmdreq.cmds = ctrl->status_cmds.cmds;
cmdreq.cmds_cnt = ctrl->status_cmds.cmd_cnt;
cmdreq.flags = CMD_REQ_COMMIT | CMD_CLK_CTRL | CMD_REQ_RX;
cmdreq.rlen = 4; //modified 4 這個會發送37指令，指定返回4個參數.
cmdreq.cb = NULL;
cmdreq.rbuf = ctrl->status_buf.data;
return mdss_dsi_cmdlist_put(ctrl, &cmdreq);
}
/*end: add by chenhaibing for hx8379c read status 20141021*/
mdss_dsi_reg_status_check添加相關軍客制化判斷邏輯.
在msm8916調試 Himax 8379C 時遇到功耗問題:
原因分析：
量測試開機或喚醒的波形圖，是因為此IC不能自己進入ulps模式，msm8916默認的source code 也沒有開啟ulps.導致上面實測波形與IC spec不符。
引起屏漏電.
解決方案在dtsi配置下面節點.
qcom,mdss-dsi-lp11-init; //確保reset 信號拉低時，clock和data都要及時被拉高,某些IC時序有此要求.
qcom,suspend-ulps-enabled;
上面節點打開后，還需要高通釋放相關patch合入才能最終解決此問題。
客制化啟動logo方法
How to customize splash image
ntroduction and Background:
For LK display (boot loader) logo, there are two methods:
a) Read the splash image data from splash.h file.
b) Get the splash image data from Splash Partition.
Solution Statement:
For a), please see the below source codes:
bootable/bootloader/lk/platform/msm_shared/include/splash.h
bootable/bootloader/lk/dev/fbcon/fbcon.c
When fbimg is NULL, LK display data gets from imageBuffer_rgb888 arrays. Please see the below snippet codes.
void display_image_on_screen()
{
struct fbimage default_fbimg, *fbimg;
bool flag = true;
fbcon_clear();
fbimg = fetch_image_from_partition(); // Splash image from partition
if(!fbimg) {
flag = false;
fbimg = &default_fbimg;
fbimg->header.width = SPLASH_IMAGE_HEIGHT;
fbimg->header.height = SPLASH_IMAGE_WIDTH;
#if DISPLAY_TYPE_MIPI
fbimg->image = (unsigned char *)imageBuffer_rgb888;
#else
fbimg->image = (unsigned char *)imageBuffer;
#endif
}
fbcon_putImage(fbimg, flag);
}
For b), the steps to generate the splash.img:
1). Install the python on Linux desktop OS.
sudo apt-get install python-imaging
2). Prepare the logo picture with the PNG format in "device/qcom/common/display/logo" folder, such as "test.png".
python ./logo_gen.py test.png
3). Add splash partition on your partition.xml, such as
<partition label="splash" size_in_kb="10240" type="20117f86-E985-4357-B9EE-374BC1D8487D" bootable="false" readonly="false" filename=""/>
4). Check if have "splash.img", and then flash splash image to your device.
fastboot flash splash splash.img
第二種：python ./logo_gen.py test.png (MSM8916平台沒有看到logo_gen.py) ,flash.img4).
Check if have "splash.img", and then flash splash image to your device.