From: Ville Syrjälä <ville.syrj...@linux.intel.com>

All the this generic 'plane' vs 'linked' stuff is hard to
follow. Rename the variables to use the y_plane vs. uv_plane
terminology to make it clear which is which.

v2: Rebase due to intel_display changes

Reviewed-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 99 +++++++++++---------
 1 file changed, 54 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 33e9b56cc5d5..b7f233e526d6 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -4411,50 +4411,56 @@ static bool check_single_encoder_cloning(struct 
intel_atomic_state *state,
 }
 
 static void link_nv12_planes(struct intel_crtc_state *crtc_state,
-                            struct intel_plane_state *plane_state,
-                            struct intel_plane_state *linked_state)
+                            struct intel_plane_state *uv_plane_state,
+                            struct intel_plane_state *y_plane_state)
 {
-       struct intel_display *display = to_intel_display(plane_state);
-       struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
-       struct intel_plane *linked = to_intel_plane(linked_state->uapi.plane);
+       struct intel_display *display = to_intel_display(uv_plane_state);
+       struct intel_plane *uv_plane = 
to_intel_plane(uv_plane_state->uapi.plane);
+       struct intel_plane *y_plane = to_intel_plane(y_plane_state->uapi.plane);
 
        drm_dbg_kms(display->drm, "UV plane [PLANE:%d:%s] using Y plane 
[PLANE:%d:%s]\n",
-                   plane->base.base.id, plane->base.name,
-                   linked->base.base.id, linked->base.name);
+                   uv_plane->base.base.id, uv_plane->base.name,
+                   y_plane->base.base.id, y_plane->base.name);
 
-       plane_state->planar_linked_plane = linked;
+       uv_plane_state->planar_linked_plane = y_plane;
 
-       linked_state->is_y_plane = true;
-       linked_state->planar_linked_plane = plane;
+       y_plane_state->is_y_plane = true;
+       y_plane_state->planar_linked_plane = uv_plane;
 
-       crtc_state->enabled_planes |= BIT(linked->id);
-       crtc_state->active_planes |= BIT(linked->id);
-       crtc_state->update_planes |= BIT(linked->id);
+       crtc_state->enabled_planes |= BIT(y_plane->id);
+       crtc_state->active_planes |= BIT(y_plane->id);
+       crtc_state->update_planes |= BIT(y_plane->id);
 
-       crtc_state->data_rate[linked->id] = crtc_state->data_rate_y[plane->id];
-       crtc_state->rel_data_rate[linked->id] = 
crtc_state->rel_data_rate_y[plane->id];
+       crtc_state->data_rate[y_plane->id] = 
crtc_state->data_rate_y[uv_plane->id];
+       crtc_state->rel_data_rate[y_plane->id] = 
crtc_state->rel_data_rate_y[uv_plane->id];
 
        /* Copy parameters to Y plane */
-       linked_state->ctl = plane_state->ctl | PLANE_CTL_YUV420_Y_PLANE;
-       linked_state->color_ctl = plane_state->color_ctl;
-       linked_state->view = plane_state->view;
-       linked_state->decrypt = plane_state->decrypt;
+       y_plane_state->ctl = uv_plane_state->ctl | PLANE_CTL_YUV420_Y_PLANE;
+       y_plane_state->color_ctl = uv_plane_state->color_ctl;
+       y_plane_state->view = uv_plane_state->view;
+       y_plane_state->decrypt = uv_plane_state->decrypt;
 
-       intel_plane_copy_hw_state(linked_state, plane_state);
-       linked_state->uapi.src = plane_state->uapi.src;
-       linked_state->uapi.dst = plane_state->uapi.dst;
+       intel_plane_copy_hw_state(y_plane_state, uv_plane_state);
+       y_plane_state->uapi.src = uv_plane_state->uapi.src;
+       y_plane_state->uapi.dst = uv_plane_state->uapi.dst;
 
-       if (icl_is_hdr_plane(display, plane->id)) {
-               if (linked->id == PLANE_7)
-                       plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_7_ICL;
-               else if (linked->id == PLANE_6)
-                       plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_6_ICL;
-               else if (linked->id == PLANE_5)
-                       plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_5_RKL;
-               else if (linked->id == PLANE_4)
-                       plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_4_RKL;
-               else
-                       MISSING_CASE(linked->id);
+       if (icl_is_hdr_plane(display, uv_plane->id)) {
+               switch (y_plane->id) {
+               case PLANE_7:
+                       uv_plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_7_ICL;
+                       break;
+               case PLANE_6:
+                       uv_plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_6_ICL;
+                       break;
+               case PLANE_5:
+                       uv_plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_5_RKL;
+                       break;
+               case PLANE_4:
+                       uv_plane_state->cus_ctl |= PLANE_CUS_Y_PLANE_4_RKL;
+                       break;
+               default:
+                       MISSING_CASE(y_plane->id);
+               }
        }
 }
 
@@ -4487,8 +4493,8 @@ static int icl_check_nv12_planes(struct 
intel_atomic_state *state,
        struct drm_i915_private *dev_priv = to_i915(state->base.dev);
        struct intel_crtc_state *crtc_state =
                intel_atomic_get_new_crtc_state(state, crtc);
-       struct intel_plane *plane, *linked;
        struct intel_plane_state *plane_state;
+       struct intel_plane *plane;
        int i;
 
        if (DISPLAY_VER(dev_priv) < 11)
@@ -4510,27 +4516,30 @@ static int icl_check_nv12_planes(struct 
intel_atomic_state *state,
                return 0;
 
        for_each_new_intel_plane_in_state(state, plane, plane_state, i) {
-               struct intel_plane_state *linked_state = NULL;
+               struct intel_plane_state *y_plane_state = NULL;
+               struct intel_plane *y_plane;
 
-               if (plane->pipe != crtc->pipe ||
-                   !(crtc_state->nv12_planes & BIT(plane->id)))
+               if (plane->pipe != crtc->pipe)
                        continue;
 
-               for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, linked) {
-                       if (!icl_is_nv12_y_plane(display, linked->id))
+               if ((crtc_state->nv12_planes & BIT(plane->id)) == 0)
+                       continue;
+
+               for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, y_plane) {
+                       if (!icl_is_nv12_y_plane(display, y_plane->id))
                                continue;
 
-                       if (crtc_state->active_planes & BIT(linked->id))
+                       if (crtc_state->active_planes & BIT(y_plane->id))
                                continue;
 
-                       linked_state = intel_atomic_get_plane_state(state, 
linked);
-                       if (IS_ERR(linked_state))
-                               return PTR_ERR(linked_state);
+                       y_plane_state = intel_atomic_get_plane_state(state, 
y_plane);
+                       if (IS_ERR(y_plane_state))
+                               return PTR_ERR(y_plane_state);
 
                        break;
                }
 
-               if (!linked_state) {
+               if (!y_plane_state) {
                        drm_dbg_kms(&dev_priv->drm,
                                    "[CRTC:%d:%s] need %d free Y planes for 
planar YUV\n",
                                    crtc->base.base.id, crtc->base.name,
@@ -4538,7 +4547,7 @@ static int icl_check_nv12_planes(struct 
intel_atomic_state *state,
                        return -EINVAL;
                }
 
-               link_nv12_planes(crtc_state, plane_state, linked_state);
+               link_nv12_planes(crtc_state, plane_state, y_plane_state);
        }
 
        return 0;
-- 
2.45.3

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