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path: root/drivers/gpu/drm/i915/intel_display.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a0f4ac187f1a..56018b79da62 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5369,7 +5369,8 @@ 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. */
@@ -5386,6 +5387,8 @@ 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)