rooty/rpi-vk-driver
1
0
Fork 0
mirror of https://github.com/Yours3lf/rpi-vk-driver.git synced 2025-02-07 04:54:20 +01:00
Code Issues Releases Wiki Activity

added non-default crtc case

Browse Source
This commit is contained in:
Unknown 2020-04-16 18:17:35 +01:00
parent efa43b2ccc
commit a61e99b7b2
1 changed files with 40 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
driver/modeset.c
View File

@ -96,31 +96,62 @@ void modeset_create_surface_for_mode(int fd, uint32_t display, uint32_t mode, mo
return; return;
} }
drmModeEncoderPtr encPtr = 0; uint32_t found = 0;
//TODO
//if current encoder is valid, try to use that //if current encoder is valid, try to use that
if(connPtr->encoder_id) if(connPtr->encoder_id)
{ {
encPtr = drmModeGetEncoder(fd, connPtr->encoder_id); drmModeEncoderPtr encPtr = drmModeGetEncoder(fd, connPtr->encoder_id);
}
if(encPtr) if(encPtr && encPtr->crtc_id)
{
if(encPtr->crtc_id)
{ {
surface->connector = connPtr; surface->connector = connPtr;
surface->modeID = mode; surface->modeID = mode;
surface->crtc = drmModeGetCrtc(fd, encPtr->crtc_id); surface->crtc = drmModeGetCrtc(fd, encPtr->crtc_id);
//fprintf(stderr, "connector id %i, crtc id %i\n", connPtr->connector_id, encPtr->crtc_id); found = 1;
} }
drmModeFreeEncoder(encPtr); drmModeFreeEncoder(encPtr);
} }
if(!found)
{
// To find a suitable CRTC, you need to iterate over the list of encoders that are available
// for each connector. Each encoder contains a list of CRTCs that it can work with and you
// simply select one of these CRTCs. If you later program the CRTC to control a connector,
// it automatically selects the best encoder
// TODO if we were to output to multiple displays, we'd need to make sure we don't use a CRTC
// that we'd be using to drive the other screen
for(uint32_t c = 0; c < connPtr->count_encoders; ++c)
{
drmModeEncoderPtr encPtr = drmModeGetEncoder(fd, connPtr->encoders[c]);
for(uint32_t d = 0; d < 32; ++d)
{
if(encPtr->possible_crtcs & (1 << d))
{
surface->connector = connPtr;
surface->modeID = mode;
surface->crtc = drmModeGetCrtc(fd, resPtr->crtcs[d]);
found = 1;
break;
}
}
if(found)
{
break;
}
}
}
drmModeFreeResources(resPtr); drmModeFreeResources(resPtr);
//fprintf(stderr, "connector id %i, crtc id %i\n", connPtr->connector_id, encPtr->crtc_id);
} }
void modeset_create_fb_for_surface(int fd, _image* buf, modeset_display_surface* surface) void modeset_create_fb_for_surface(int fd, _image* buf, modeset_display_surface* surface)