1. 直屏比橫屏便宜許多
2. Qwerty keypad phone(全键盘手机),客戶普遍用”直屏橫放“的方式來实现, 但得自己承受 performance 和tearing(斜切屏) 問題. 因为使用LCM做90度Rotate,则必然出现斜切屏。
3. MTK 提供tearing-free(斜切屏解决方法) 以及 good performance。无需LCM做90度 Rotate,由MTK完成rotate。但是需要消耗更多的RAM资源 ,因为需要多一些working buffers但有一定限制条件。
1. 设置project.mak
1)10A [MT6252/MT6253]
LANDSCAPE_UI_ON_POTRAIT_LCM = TRUE
LANDSCAPE_UI_ON_POTRAIT_LCM_CCW_ROTATION_ANGLE = 270
HORIZONTAL_CAMERA = FALSE
2)HAL(11A/11B及以后)
MAIN_LCD_SIZE =
LCM_SCANLINE_ROTATION_SUPPORT = TRUE
// Main LCD
MAIN_LCM_SCANLINE_ROTATION = TRUE
MAIN_LCM_SCANLINE_ROTATION_CCW_ANGLE = 270 // 270/90
// Sub LCD
SUB_LCM_SCANLINE_ROTATION = FALSE
SUB_LCM_SCANLINE_ROTATION_CCW_ANGLE = 0
HORIZONTAL_CAMERA = FALSE
2. 特别说明及限制
1)11B1132MP [MT6252]
a)需要申请patch,Patch ID: MAUI_03081992
b)如果如下有些option在您的makefile中不存在,还请自行添加。
MAIN_LCD_SIZE =
LCM_SCANLINE_ROTATION_SUPPORT = TRUE
MAIN_LCM_SCANLINE_ROTATION = TRUE
MAIN_LCM_SCANLINE_ROTATION_CCW_ANGLE = 270
SUB_LCM_SCANLINE_ROTATION = FALSE
SUB_LCM_SCANLINE_ROTATION_CCW_ANGLE = 0
2) MT6252平台,受MDP限制,必须设置CCW_ANGLE = 270.
如果界面出现了180度反转,修改LCM setting里scan Direction的方向180度即可。
3)如果是MT6250 & MT6255平台.開了LCM_SCANLINE_ROTATION_SUPPORT = TRUE之後會遇到開不了機的問題.
請修改2隻檔案.
1.open hal/display/flatten/src/flatten_api.c
Please find the function (FlattenGetOwnership).
//if(KAL_TRUE == system_init_status) (Please mark this line)
{
system_init_status = kal_query_systemInit();// only in systemInit needs to check
}
if ( (KAL_TRUE == system_init_status) || (INT_QueryExceptionStatus()) )
{
g2dSetCallbackFunction(g2d_handle,NULL);
}
2.open hal/display/flatten/src/hw_6250/flatten_api_6250.c
or /hal/display/flatten/src/hw_6255/flatten_api_6255.c
Please find the function (__flatten_gOvlRot_WaitEvent).
IRQMask(IRQ_GOVL_CODE);
while(GOVL_IS_RUNNING);
//__flatten_gRot_WaitHWIdle();
{
pCtrlConfig->rotationAngle = FLATTEN_ROTATION_0;
//RestoreIRQMask(save_irq_mask);
}
GOVL_CLEAR_INT_STATUS; (Please add code).
REG_GOVL_IRQ;
__flatten_gOvl_ExecActiveEventsCb(FLATTEN_GOVL_HW_TRANSFER_COMPLETE_EVENT);
IRQUnmask(IRQ_GOVL_CODE);
at last, please m r drv_display and try again.
Thanks.
标签:CCW,竖屏,直屏,横用,flatten,SCANLINE,ROTATION,LCM,TRUE From: https://blog.51cto.com/u_15170706/6167939