On Mon, 25 Oct 2021 at 16:29, Maxime Ripard <maxime@xxxxxxxxxx> wrote: > > The encoder retrieval code has been a source of bugs and glitches in the > past and the crtc <-> encoder association been wrong in a number of > different ways. > > Add some logging to quickly spot issues if they occur. > > Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> Reviewed-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/vc4/vc4_crtc.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c > index fbc1d4638650..6decaa12a078 100644 > --- a/drivers/gpu/drm/vc4/vc4_crtc.c > +++ b/drivers/gpu/drm/vc4/vc4_crtc.c > @@ -541,6 +541,9 @@ static void vc4_crtc_atomic_disable(struct drm_crtc *crtc, > struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, old_state); > struct drm_device *dev = crtc->dev; > > + drm_dbg(dev, "Disabling CRTC %s (%u) connected to Encoder %s (%u)", > + crtc->name, crtc->base.id, encoder->name, encoder->base.id); > + > require_hvs_enabled(dev); > > /* Disable vblank irq handling before crtc is disabled. */ > @@ -572,6 +575,9 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc, > struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, new_state); > struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); > > + drm_dbg(dev, "Enabling CRTC %s (%u) connected to Encoder %s (%u)", > + crtc->name, crtc->base.id, encoder->name, encoder->base.id); > + > require_hvs_enabled(dev); > > /* Enable vblank irq handling before crtc is started otherwise > -- > 2.31.1 >
