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AM3517 Wince BSP A8_01_02_00 screen rotation 90 degree performance issue
Our customer use AM3505/3517 platform with 800*600 LCD panel.
They want rotation 90 degree.
When they rotation the screen, they find the performance is not good.
Have anyone know how to improve the display driver performance?
Attached file is our customer used AP which is use Microsoft .NET framewoork 3.5 and Chinese ttradition font.
It is for your reference.
Thanks a lot!!4861.POSCE.rar
Which BSp is the customer using? Can you check if VRFB is enabled in the catalog? That should help in display rotation.
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The WinCE BSP version is A8_01_02_00, and customer also turn on VFRP function in the catalog.
But it didn't help the display rotation performance.
Have another idea for help this?
are they playing any video while rotating or just rotation of windows desktop shows poor performance? Can they provide the dss register dump on screen rotation. Use "do dump dss" command from telnet prompt.
Customer didn't play any video, they only run their ap( just vertical scroll window).
We will dump the dss register and provide to you later.
Thanks a lot !!
The dss register list below
DISPC Registers (Control):
DISPC Registers (LCD):
DISPC Registers (GFX):
DISPC Registers (VID 1):
DISPC_VIDn_FIR_COEF_Hi _HVi _Vi:
0: H = 0x00000000 HV = 0x00000000 V = 0x00000000
1: H = 0x00000000 HV = 0x00000000 V = 0x00000000
2: H = 0x00000000 HV = 0x00000000 V = 0x00000000
3: H = 0x00000000 HV = 0x00000000 V = 0x00000000
4: H = 0x00000000 HV = 0x00000000 V = 0x00000000
5: H = 0x00000000 HV = 0x00000000 V = 0x00000000
6: H = 0x00000000 HV = 0x00000000 V = 0x00000000
7: H = 0x00000000 HV = 0x00000000 V = 0x00000000
DISPC Registers (VID 2):
Are you still facing this issue? I dont see anything suspicious in your DSS settings. Did you check the CPU utilization when the display is rotated and your app is running? Do you see issues when the display is rotated and just the windows desktop is displayed? Is the performance good when your app is running and display is not rotated?
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