diff options
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_crtc.c | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c index 2bfa2470e66b..7ffdad543ed2 100644 --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -163,14 +163,6 @@ int vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id, int vblank_lines; int ret = 0; - /* - * XXX Doesn't work well in interlaced mode yet, partially due - * to problems in vc4 kms or drm core interlaced mode handling, - * so disable for now in interlaced mode. - */ - if (mode->flags & DRM_MODE_FLAG_INTERLACE) - return ret; - /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */ /* Get optional system timestamp before query. */ @@ -191,10 +183,15 @@ int vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id, /* Vertical position of hvs composed scanline. */ *vpos = VC4_GET_FIELD(val, SCALER_DISPSTATX_LINE); + *hpos = 0; + + if (mode->flags & DRM_MODE_FLAG_INTERLACE) { + *vpos /= 2; - /* No hpos info available. */ - if (hpos) - *hpos = 0; + /* Use hpos to correct for field offset in interlaced mode. */ + if (VC4_GET_FIELD(val, SCALER_DISPSTATX_FRAME_COUNT) % 2) + *hpos += mode->crtc_htotal / 2; + } /* This is the offset we need for translating hvs -> pv scanout pos. */ fifo_lines = vc4_crtc->cob_size / mode->crtc_hdisplay; @@ -217,8 +214,6 @@ int vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id, * position of the PV. */ *vpos -= fifo_lines + 1; - if (mode->flags & DRM_MODE_FLAG_INTERLACE) - *vpos /= 2; ret |= DRM_SCANOUTPOS_ACCURATE; return ret; |