drm/i915: move check of intel_crtc_cursor_set_obj() out

Move check inside intel_crtc_cursor_set_obj() to
intel_check_cursor_plane(), we only use it there so move them out to
make the merge of intel_crtc_cursor_set_obj() into
intel_check_cursor_plane() easier.

This is another step toward the atomic modesetting support and unification
of plane operations such pin/unpin of fb objects on i915.

v2: take Ville's comment: move crtc_{w,h} assignment a bit down in the
code
v3: take Ville's comment: kept only the restructuring changes, the rest of
the code was moved to a separated patch since it is a bug fix (we weren't
checking sizes when the fb was the same)

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
[danvet: Fixup commit message mixup.]
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.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 8b85aa6..81f5656 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8463,7 +8463,7 @@ static int intel_crtc_cursor_set_obj(struct drm_crtc *crtc,
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        enum pipe pipe = intel_crtc->pipe;
-       unsigned old_width, stride;
+       unsigned old_width;
        uint32_t addr;
        int ret;
 
@@ -8475,29 +8475,11 @@ static int intel_crtc_cursor_set_obj(struct drm_crtc *crtc,
                goto finish;
        }
 
-       /* Check for which cursor types we support */
-       if (!cursor_size_ok(dev, width, height)) {
-               DRM_DEBUG("Cursor dimension not supported\n");
-               return -EINVAL;
-       }
-
-       stride = roundup_pow_of_two(width) * 4;
-       if (obj->base.size < stride * height) {
-               DRM_DEBUG_KMS("buffer is too small\n");
-               return -ENOMEM;
-       }
-
        /* we only need to pin inside GTT if cursor is non-phy */
        mutex_lock(&dev->struct_mutex);
        if (!INTEL_INFO(dev)->cursor_needs_physical) {
                unsigned alignment;
 
-               if (obj->tiling_mode) {
-                       DRM_DEBUG_KMS("cursor cannot be tiled\n");
-                       ret = -EINVAL;
-                       goto fail_locked;
-               }
-
                /*
                 * Global gtt pte registers are special registers which actually
                 * forward writes to a chunk of system memory. Which means that
@@ -11918,16 +11900,55 @@ intel_check_cursor_plane(struct drm_plane *plane,
                         struct intel_plane_state *state)
 {
        struct drm_crtc *crtc = state->crtc;
+       struct drm_device *dev = crtc->dev;
        struct drm_framebuffer *fb = state->fb;
        struct drm_rect *dest = &state->dst;
        struct drm_rect *src = &state->src;
        const struct drm_rect *clip = &state->clip;
+       struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+       int crtc_w, crtc_h;
+       unsigned stride;
+       int ret;
 
-       return drm_plane_helper_check_update(plane, crtc, fb,
+       ret = drm_plane_helper_check_update(plane, crtc, fb,
                                            src, dest, clip,
                                            DRM_PLANE_HELPER_NO_SCALING,
                                            DRM_PLANE_HELPER_NO_SCALING,
                                            true, true, &state->visible);
+       if (ret)
+               return ret;
+
+
+       /* if we want to turn off the cursor ignore width and height */
+       if (!obj)
+               return 0;
+
+       if (fb == crtc->cursor->fb)
+               return 0;
+
+       /* Check for which cursor types we support */
+       crtc_w = drm_rect_width(&state->orig_dst);
+       crtc_h = drm_rect_height(&state->orig_dst);
+       if (!cursor_size_ok(dev, crtc_w, crtc_h)) {
+               DRM_DEBUG("Cursor dimension not supported\n");
+               return -EINVAL;
+       }
+
+       stride = roundup_pow_of_two(crtc_w) * 4;
+       if (obj->base.size < stride * crtc_h) {
+               DRM_DEBUG_KMS("buffer is too small\n");
+               return -ENOMEM;
+       }
+
+       /* we only need to pin inside GTT if cursor is non-phy */
+       mutex_lock(&dev->struct_mutex);
+       if (!INTEL_INFO(dev)->cursor_needs_physical && obj->tiling_mode) {
+               DRM_DEBUG_KMS("cursor cannot be tiled\n");
+               ret = -EINVAL;
+       }
+       mutex_unlock(&dev->struct_mutex);
+
+       return ret;
 }
 
 static int