From: Ville Syrjälä <[email protected]> If vsyncshift comes out as negative, add one htotal to it to get the corresponding positive value.
This is rather theoretical as it would require a mode where the hsync+back porch is very long and the active+front porch very short. Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/intel_display.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3ab40e3..7d3b18b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5377,7 +5377,8 @@ static void intel_set_pipe_timings(struct intel_crtc *intel_crtc) enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder; struct drm_display_mode *adjusted_mode = &intel_crtc->config.adjusted_mode; - uint32_t vsyncshift = 0, crtc_vtotal, crtc_vblank_end; + uint32_t crtc_vtotal, crtc_vblank_end; + int vsyncshift = 0; /* We need to be careful not to changed the adjusted mode, for otherwise * the hw state checker will get angry at the mismatch. */ @@ -5394,6 +5395,8 @@ static void intel_set_pipe_timings(struct intel_crtc *intel_crtc) else vsyncshift = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_htotal / 2; + if (vsyncshift < 0) + vsyncshift += adjusted_mode->crtc_htotal; } if (INTEL_INFO(dev)->gen > 3) -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
