On Mon, Oct 18, 2021 at 02:50:23PM +0300, Ville Syrjala wrote: > From: Ville Syrjälä <[email protected]> > > We're currently forgetting to set the PLANE_SURF_DECRYPT > flag in the async flip path. So if the hardware were to > latch that bit despite this being an async flip we'd start > scanning out garbage. And if it doesn't latch it then I > guess we'd just end up with a weird register value that > doesn't actually match the hardware state, which isn't > great for anyone starting at register dumps. > > Similarly the async flip path also forgets to call > skl_surf_address() which means the DPT address space to > GGTT address space downshift is not being applied to > the offset. Which means we are pointing PLANE_SURF > at some random location in GGTT instead of the correct > DPT page. > > So let's fix two birds with one stone and extract the > PLANE_SURF calculation from skl_program_plane() into > a small helper and use it in the async flip path as well.
Reviewed-by: Stanislav Lisovskiy <[email protected]> > > Cc: Anshuman Gupta <[email protected]> > Cc: Daniele Ceraolo Spurio <[email protected]> > Cc: Juston Li <[email protected]> > Cc: Rodrigo Vivi <[email protected]> > Cc: Uma Shankar <[email protected]> > Cc: Karthik B S <[email protected]> > Signed-off-by: Ville Syrjälä <[email protected]> > --- > .../drm/i915/display/skl_universal_plane.c | 30 ++++++++++++------- > 1 file changed, 20 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c > b/drivers/gpu/drm/i915/display/skl_universal_plane.c > index 7444b88829ea..e2f024449149 100644 > --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c > +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c > @@ -1011,6 +1011,20 @@ static u32 skl_surf_address(const struct > intel_plane_state *plane_state, > } > } > > +static u32 skl_plane_surf(const struct intel_plane_state *plane_state, > + int color_plane) > +{ > + u32 plane_surf; > + > + plane_surf = intel_plane_ggtt_offset(plane_state) + > + skl_surf_address(plane_state, color_plane); > + > + if (plane_state->decrypt) > + plane_surf |= PLANE_SURF_DECRYPT; > + > + return plane_surf; > +} > + > static void icl_plane_csc_load_black(struct intel_plane *plane) > { > struct drm_i915_private *i915 = to_i915(plane->base.dev); > @@ -1045,7 +1059,6 @@ skl_program_plane(struct intel_plane *plane, > enum plane_id plane_id = plane->id; > enum pipe pipe = plane->pipe; > const struct drm_intel_sprite_colorkey *key = &plane_state->ckey; > - u32 surf_addr = skl_surf_address(plane_state, color_plane); > u32 stride = skl_plane_stride(plane_state, color_plane); > const struct drm_framebuffer *fb = plane_state->hw.fb; > int aux_plane = skl_main_to_aux_plane(fb, color_plane); > @@ -1058,7 +1071,7 @@ skl_program_plane(struct intel_plane *plane, > u8 alpha = plane_state->hw.alpha >> 8; > u32 plane_color_ctl = 0, aux_dist = 0; > unsigned long irqflags; > - u32 keymsk, keymax, plane_surf; > + u32 keymsk, keymax; > u32 plane_ctl = plane_state->ctl; > > plane_ctl |= skl_plane_ctl_crtc(crtc_state); > @@ -1084,16 +1097,13 @@ skl_program_plane(struct intel_plane *plane, > } > > if (aux_plane) { > - aux_dist = skl_surf_address(plane_state, aux_plane) - surf_addr; > + aux_dist = skl_surf_address(plane_state, aux_plane) - > + skl_surf_address(plane_state, color_plane); > > if (DISPLAY_VER(dev_priv) < 12) > aux_dist |= skl_plane_stride(plane_state, aux_plane); > } > > - plane_surf = intel_plane_ggtt_offset(plane_state) + surf_addr; > - if (plane_state->decrypt) > - plane_surf |= PLANE_SURF_DECRYPT; > - > spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); > > /* > @@ -1157,7 +1167,8 @@ skl_program_plane(struct intel_plane *plane, > * the control register just before the surface register. > */ > intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl); > - intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id), plane_surf); > + intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id), > + skl_plane_surf(plane_state, color_plane)); > > spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); > } > @@ -1172,7 +1183,6 @@ skl_plane_async_flip(struct intel_plane *plane, > unsigned long irqflags; > enum plane_id plane_id = plane->id; > enum pipe pipe = plane->pipe; > - u32 surf_addr = plane_state->view.color_plane[0].offset; > u32 plane_ctl = plane_state->ctl; > > plane_ctl |= skl_plane_ctl_crtc(crtc_state); > @@ -1184,7 +1194,7 @@ skl_plane_async_flip(struct intel_plane *plane, > > intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl); > intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id), > - intel_plane_ggtt_offset(plane_state) + surf_addr); > + skl_plane_surf(plane_state, 0)); > > spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); > } > -- > 2.32.0 >
