diff options
| -rw-r--r-- | src/atombios_crtc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/atombios_crtc.c b/src/atombios_crtc.c index f15c7079..3a748fc4 100644 --- a/src/atombios_crtc.c +++ b/src/atombios_crtc.c @@ -401,6 +401,15 @@ atombios_crtc_mode_set(xf86CrtcPtr crtc, OUTREG(AVIVO_CRTC1_PITCH + radeon_crtc->crtc_offset, crtc->scrn->displayWidth); + /* avivo can only shift offset by 4 pixel in x if you program somethings + * not multiple of 4 you gonna drive the GPU crazy and likely won't + * be able to restore it without cold reboot (vbe post not enough) + */ + x = x & ~3; + OUTREG(AVIVO_CRTC1_OFFSET_END + radeon_crtc->crtc_offset, + ((mode->HDisplay + x -128) << 16) | (mode->VDisplay + y - 128)); + OUTREG(AVIVO_CRTC1_OFFSET_START + radeon_crtc->crtc_offset, (x << 16) | y); + OUTREG(AVIVO_CRTC1_SCAN_ENABLE + radeon_crtc->crtc_offset, 1); } |