drm/i915: Introduce intel_calc_active_pipes()

Extract a small helper to compute the active pipes bitmask
based on the old bitmask + the crtcs in the atomic state.
I want to decouple the cdclk state entirely from the current
global state so I want to track the active pipes also inside
the (to be introduced) full cdclk state.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200120174728.21095-17-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9f20c7d..c6d764b 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14540,26 +14540,32 @@ static int hsw_mode_set_planes_workaround(struct intel_atomic_state *state)
        return 0;
 }
 
+u8 intel_calc_active_pipes(struct intel_atomic_state *state,
+                          u8 active_pipes)
+{
+       const struct intel_crtc_state *crtc_state;
+       struct intel_crtc *crtc;
+       int i;
+
+       for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+               if (crtc_state->hw.active)
+                       active_pipes |= BIT(crtc->pipe);
+               else
+                       active_pipes &= ~BIT(crtc->pipe);
+       }
+
+       return active_pipes;
+}
+
 static int intel_modeset_checks(struct intel_atomic_state *state)
 {
        struct drm_i915_private *dev_priv = to_i915(state->base.dev);
-       struct intel_crtc_state *old_crtc_state, *new_crtc_state;
-       struct intel_crtc *crtc;
-       int ret, i;
+       int ret;
 
        state->modeset = true;
-       state->active_pipes = dev_priv->active_pipes;
+       state->active_pipes = intel_calc_active_pipes(state, dev_priv->active_pipes);
 
-       for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
-                                           new_crtc_state, i) {
-               if (new_crtc_state->hw.active)
-                       state->active_pipes |= BIT(crtc->pipe);
-               else
-                       state->active_pipes &= ~BIT(crtc->pipe);
-
-               if (old_crtc_state->hw.active != new_crtc_state->hw.active)
-                       state->active_pipe_changes |= BIT(crtc->pipe);
-       }
+       state->active_pipe_changes = state->active_pipes ^ dev_priv->active_pipes;
 
        if (state->active_pipe_changes) {
                ret = _intel_atomic_lock_global_state(state);

diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 6805e29..75438a1 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -44,6 +44,7 @@ struct drm_modeset_acquire_ctx;
 struct drm_plane;
 struct drm_plane_state;
 struct i915_ggtt_view;
+struct intel_atomic_state;
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_digital_port;
@@ -469,6 +470,8 @@ enum phy_fia {
                             ((connector) = to_intel_connector((__state)->base.connectors[__i].ptr), \
                             (new_connector_state) = to_intel_digital_connector_state((__state)->base.connectors[__i].new_state), 1))
 
+u8 intel_calc_active_pipes(struct intel_atomic_state *state,
+                          u8 active_pipes);
 void intel_link_compute_m_n(u16 bpp, int nlanes,
                            int pixel_clock, int link_clock,
                            struct intel_link_m_n *m_n,