Hi All,
I am getting tearing issue with ApiDemos->Graphics->OpenGL applications. Has
anyone checked these applications on there platform?
I have VGA display and the psuedo fb implementation is as follows:
pan_display()
{
1. gets the yoffset(0/480) and updates the display base address in a
global variable
2. enables the interuppt on vertical sync
3. waits for event
}
isr()
{
1. clears the interrupt
2. gets the base address from global variable and updates the actual
display register
3. sends the wakeup event to the pan_display
}
My understanding is pan_display will be called by EGLsurface context and isr
is in interrupt context.
The functionality of EGLsurface is to update the active FB for display and
use the inactive FB for processing.
Means only EGL is updating the FB. Is this correct?
With the above sync between pan_display and isr using wait event tearing
should not occur. But still we are getting...:(
Your observations and inputs are most welcome.
My setup is from master branch with 2.6.25 android kernel for my platform.
Thanks and Regards,
MS
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