drm/i915: atomic plane updates in a nutshell

Now that all planes are added during a modeset we can use the
calculated changes before disabling a plane, and then either commit
or force disable a plane before disabling the crtc.

The code is shared with atomic_begin/flush, except watermark updating
and vblank evasion are not used.

This is needed for proper atomic suspend/resume support.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90868
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Tested-by(IVB): Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 827c5a5..32fac72 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2217,28 +2217,6 @@ static void intel_disable_pipe(struct intel_crtc *crtc)
                intel_wait_for_pipe_off(crtc);
 }
 
-/**
- * intel_enable_primary_hw_plane - enable the primary plane on a given pipe
- * @plane:  plane to be enabled
- * @crtc: crtc for the plane
- *
- * Enable @plane on @crtc, making sure that the pipe is running first.
- */
-static void intel_enable_primary_hw_plane(struct drm_plane *plane,
-                                         struct drm_crtc *crtc)
-{
-       struct drm_device *dev = plane->dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-
-       /* If the pipe isn't enabled, we can't pump pixels and may hang */
-       assert_pipe_enabled(dev_priv, intel_crtc->pipe);
-       to_intel_plane_state(plane->state)->visible = true;
-
-       dev_priv->display.update_primary_plane(crtc, plane->fb,
-                                              crtc->x, crtc->y);
-}
-
 static bool need_vtd_wa(struct drm_device *dev)
 {
 #ifdef CONFIG_INTEL_IOMMU
@@ -4518,20 +4496,6 @@ static void ironlake_pfit_enable(struct intel_crtc *crtc)
        }
 }
 
-static void intel_enable_sprite_planes(struct drm_crtc *crtc)
-{
-       struct drm_device *dev = crtc->dev;
-       enum pipe pipe = to_intel_crtc(crtc)->pipe;
-       struct drm_plane *plane;
-       struct intel_plane *intel_plane;
-
-       drm_for_each_legacy_plane(plane, &dev->mode_config.plane_list) {
-               intel_plane = to_intel_plane(plane);
-               if (intel_plane->pipe == pipe)
-                       intel_plane_restore(&intel_plane->base);
-       }
-}
-
 void hsw_enable_ips(struct intel_crtc *crtc)
 {
        struct drm_device *dev = crtc->base.dev;
@@ -4827,27 +4791,6 @@ static void intel_pre_plane_update(struct intel_crtc *crtc)
                intel_pre_disable_primary(&crtc->base);
 }
 
-static void intel_crtc_enable_planes(struct drm_crtc *crtc)
-{
-       struct drm_device *dev = crtc->dev;
-       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-       int pipe = intel_crtc->pipe;
-
-       intel_enable_primary_hw_plane(crtc->primary, crtc);
-       intel_enable_sprite_planes(crtc);
-       if (to_intel_plane_state(crtc->cursor->state)->visible)
-               intel_crtc_update_cursor(crtc, true);
-
-       intel_post_enable_primary(crtc);
-
-       /*
-        * FIXME: Once we grow proper nuclear flip support out of this we need
-        * to compute the mask of flip planes precisely. For the time being
-        * consider this a flip to a NULL plane.
-        */
-       intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_ALL_MASK(pipe));
-}
-
 static void intel_crtc_disable_planes(struct drm_crtc *crtc, unsigned plane_mask)
 {
        struct drm_device *dev = crtc->dev;
@@ -4855,10 +4798,6 @@ static void intel_crtc_disable_planes(struct drm_crtc *crtc, unsigned plane_mask
        struct drm_plane *p;
        int pipe = intel_crtc->pipe;
 
-       intel_crtc_wait_for_pending_flips(crtc);
-
-       intel_pre_disable_primary(crtc);
-
        intel_crtc_dpms_overlay_disable(intel_crtc);
 
        drm_for_each_plane_mask(p, dev, plane_mask)
@@ -6282,6 +6221,11 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
        if (!intel_crtc->active)
                return;
 
+       if (to_intel_plane_state(crtc->primary->state)->visible) {
+               intel_crtc_wait_for_pending_flips(crtc);
+               intel_pre_disable_primary(crtc);
+       }
+
        intel_crtc_disable_planes(crtc, crtc->state->plane_mask);
        dev_priv->display.crtc_disable(crtc);
 
@@ -11795,10 +11739,6 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
        if (old_plane_state->base.fb && !fb)
                intel_crtc->atomic.disabled_planes |= 1 << i;
 
-       /* don't run rest during modeset yet */
-       if (!intel_crtc->active || mode_changed)
-               return 0;
-
        was_visible = old_plane_state->visible;
        visible = to_intel_plane_state(plane_state)->visible;
 
@@ -13267,15 +13207,18 @@ static int __intel_set_mode(struct drm_atomic_state *state)
        drm_atomic_helper_swap_state(dev, state);
 
        for_each_crtc_in_state(state, crtc, crtc_state, i) {
+               struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
                if (!needs_modeset(crtc->state))
                        continue;
 
                any_ms = true;
-               if (!crtc_state->active)
-                       continue;
+               intel_pre_plane_update(intel_crtc);
 
-               intel_crtc_disable_planes(crtc, crtc_state->plane_mask);
-               dev_priv->display.crtc_disable(crtc);
+               if (crtc_state->active) {
+                       intel_crtc_disable_planes(crtc, crtc_state->plane_mask);
+                       dev_priv->display.crtc_disable(crtc);
+               }
        }
 
        /* Only after disabling all output pipelines that will be changed can we
@@ -13289,15 +13232,12 @@ static int __intel_set_mode(struct drm_atomic_state *state)
 
        /* Now enable the clocks, plane, pipe, and connectors that we set up. */
        for_each_crtc_in_state(state, crtc, crtc_state, i) {
-               drm_atomic_helper_commit_planes_on_crtc(crtc_state);
-
-               if (!needs_modeset(crtc->state) || !crtc->state->active)
-                       continue;
-
-               update_scanline_offset(to_intel_crtc(crtc));
+               if (needs_modeset(crtc->state) && crtc->state->active) {
+                       update_scanline_offset(to_intel_crtc(crtc));
+                       dev_priv->display.crtc_enable(crtc);
+               }
 
-               dev_priv->display.crtc_enable(crtc);
-               intel_crtc_enable_planes(crtc);
+               drm_atomic_helper_commit_planes_on_crtc(crtc_state);
        }
 
        /* FIXME: add subpixel order */
@@ -13871,7 +13811,7 @@ intel_commit_primary_plane(struct drm_plane *plane,
        crtc->x = src->x1 >> 16;
        crtc->y = src->y1 >> 16;
 
-       if (!intel_crtc->active)
+       if (!crtc->state->active)
                return;
 
        if (state->visible)
@@ -13897,7 +13837,8 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc)
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
-       intel_pre_plane_update(intel_crtc);
+       if (!needs_modeset(crtc->state))
+               intel_pre_plane_update(intel_crtc);
 
        if (intel_crtc->atomic.update_wm)
                intel_update_watermarks(crtc);
@@ -13905,7 +13846,7 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc)
        intel_runtime_pm_get(dev_priv);
 
        /* Perform vblank evasion around commit operation */
-       if (crtc->state->active && !needs_modeset(crtc->state))
+       if (crtc->state->active)
                intel_crtc->atomic.evade =
                        intel_pipe_update_start(intel_crtc,
                                                &intel_crtc->atomic.start_vbl_count);
@@ -14113,7 +14054,7 @@ intel_commit_cursor_plane(struct drm_plane *plane,
        intel_crtc->cursor_bo = obj;
 
 update:
-       if (intel_crtc->active)
+       if (crtc->state->active)
                intel_crtc_update_cursor(crtc, state->visible);
 }
 

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 699311a..b605ad8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -924,16 +924,14 @@ intel_commit_sprite_plane(struct drm_plane *plane,
                          struct intel_plane_state *state)
 {
        struct drm_crtc *crtc = state->base.crtc;
-       struct intel_crtc *intel_crtc;
        struct intel_plane *intel_plane = to_intel_plane(plane);
        struct drm_framebuffer *fb = state->base.fb;
 
        crtc = crtc ? crtc : plane->crtc;
-       intel_crtc = to_intel_crtc(crtc);
 
        plane->fb = fb;
 
-       if (!intel_crtc->active)
+       if (!crtc->state->active)
                return;
 
        if (state->visible) {