[PATCH v3 01/11] drm/i915: Merge of visible and !visible paths for primary planes

Gustavo Padovan
2014-09-24T17:20:22Z

From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Fold intel_pipe_set_base() in the update primary plane path merging
pieces of code that are common to both paths.

Basically the the pin/unpin procedures are the same for both paths
and some checks can also be shared (some of the were moved to the
check() stage)

v2: take Ville's comments:
- remove unnecessary plane check
- move mutex lock to inside the conditional
- make the pin fail message a debug one
- add a fixme for the fastboot hack
- call intel_frontbuffer_flip() after FBC update

v3: take more Ville's comments:
- fold update code under if (intel_crtc->active), and do the
visible/!visible split inside.
- check ret inside the same conditional we assign it

v4: don't use intel_enable_primary_hw_plane(), the primary_enabled
check inside will break page flips

v5: take more Ville's comments:
- set primary_enabled to true and add BDW hack
- unify if (old_fb) and if (old_fb != fb)

v6: take more Ville's comments:
- make was_primary bool and fix its check
- add the BDW vblank wait comment

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

fixup! drm/i915: Merge of visible and !visible paths for primary planes
---
drivers/gpu/drm/i915/intel_display.c | 147 ++++++++++++++++++++++-------------
1 file changed, 92 insertions(+), 55 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b8488a8..966b9af 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11676,12 +11676,23 @@ intel_check_primary_plane(struct drm_plane *plane,
struct drm_rect *dest = &state->dst;
struct drm_rect *src = &state->src;
const struct drm_rect *clip = &state->clip;
+ 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,
false, true, &state->visible);
+ if (ret)
+ return ret;
+
+ /* no fb bound */
+ if (state->visible && !fb) {
+ DRM_ERROR("No FB bound\n");
+ return -EINVAL;
+ }
+
+ return 0;
}

static int
@@ -11693,6 +11704,8 @@ intel_commit_primary_plane(struct drm_plane *plane,
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ enum pipe pipe = intel_crtc->pipe;
+ struct drm_framebuffer *old_fb = plane->fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
struct intel_plane *intel_plane = to_intel_plane(plane);
@@ -11701,76 +11714,100 @@ intel_commit_primary_plane(struct drm_plane *plane,

intel_crtc_wait_for_pending_flips(crtc);

- /*
- * If clipping results in a non-visible primary plane, we'll disable
- * the primary plane. Note that this is a bit different than what
- * happens if userspace explicitly disables the plane by passing fb=0
- * because plane->fb still gets set and pinned.
- */
- if (!state->visible) {
+ if (intel_crtc_has_pending_flip(crtc)) {
+ DRM_ERROR("pipe is still busy with an old pageflip\n");
+ return -EBUSY;
+ }
+
+ if (plane->fb != fb) {
mutex_lock(&dev->struct_mutex);
+ ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
+ if (ret == 0)
+ i915_gem_track_fb(old_obj, obj,
+ INTEL_FRONTBUFFER_PRIMARY(pipe));
+ mutex_unlock(&dev->struct_mutex);
+ if (ret != 0) {
+ DRM_DEBUG_KMS("pin & fence failed\n");
+ return ret;
+ }
+ }
+
+ crtc->primary->fb = fb;
+ crtc->x = src->x1;
+ crtc->y = src->y1;
+
+ intel_plane->crtc_x = state->orig_dst.x1;
+ intel_plane->crtc_y = state->orig_dst.y1;
+ intel_plane->crtc_w = drm_rect_width(&state->orig_dst);
+ intel_plane->crtc_h = drm_rect_height(&state->orig_dst);
+ intel_plane->src_x = state->orig_src.x1;
+ intel_plane->src_y = state->orig_src.y1;
+ intel_plane->src_w = drm_rect_width(&state->orig_src);
+ intel_plane->src_h = drm_rect_height(&state->orig_src);
+ intel_plane->obj = obj;

+ if (intel_crtc->active) {
/*
- * Try to pin the new fb first so that we can bail out if we
- * fail.
+ * FBC does not work on some platforms for rotated
+ * planes, so disable it when rotation is not 0 and
+ * update it when rotation is set back to 0.
+ *
+ * FIXME: This is redundant with the fbc update done in
+ * the primary plane enable function except that that
+ * one is done too late. We eventually need to unify
+ * this.
*/
- if (plane->fb != fb) {
- ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
- if (ret) {
- mutex_unlock(&dev->struct_mutex);
- return ret;
- }
+ if (intel_crtc->primary_enabled &&
+ INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
+ dev_priv->fbc.plane == intel_crtc->plane &&
+ intel_plane->rotation != BIT(DRM_ROTATE_0)) {
+ intel_disable_fbc(dev);
}

- i915_gem_track_fb(old_obj, obj,
- INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe));
-
- if (intel_crtc->primary_enabled)
- intel_disable_primary_hw_plane(plane, crtc);
+ if (state->visible) {
+ bool was_enabled = intel_crtc->primary_enabled;

+ /* FIXME: kill this fastboot hack */
+ intel_update_pipe_size(intel_crtc);

- if (plane->fb != fb)
- if (plane->fb)
- intel_unpin_fb_obj(old_obj);
+ intel_crtc->primary_enabled = true;

- mutex_unlock(&dev->struct_mutex);
+ dev_priv->display.update_primary_plane(crtc, plane->fb,
+ crtc->x, crtc->y);

- } else {
- if (intel_crtc && intel_crtc->active &&
- intel_crtc->primary_enabled) {
/*
- * FBC does not work on some platforms for rotated
- * planes, so disable it when rotation is not 0 and
- * update it when rotation is set back to 0.
- *
- * FIXME: This is redundant with the fbc update done in
- * the primary plane enable function except that that
- * one is done too late. We eventually need to unify
- * this.
+ * BDW signals flip done immediately if the plane
+ * is disabled, even if the plane enable is already
+ * armed to occur at the next vblank :(
*/
- if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
- dev_priv->fbc.plane == intel_crtc->plane &&
- intel_plane->rotation != BIT(DRM_ROTATE_0)) {
- intel_disable_fbc(dev);
- }
+ if (IS_BROADWELL(dev) && !was_enabled)
+ intel_wait_for_vblank(dev, intel_crtc->pipe);
+ } else {
+ /*
+ * If clipping results in a non-visible primary plane,
+ * we'll disable the primary plane. Note that this is
+ * a bit different than what happens if userspace
+ * explicitly disables the plane by passing fb=0
+ * because plane->fb still gets set and pinned.
+ */
+ intel_disable_primary_hw_plane(plane, crtc);
}
- ret = intel_pipe_set_base(crtc, src->x1, src->y1, fb);
- if (ret)
- return ret;

- if (!intel_crtc->primary_enabled)
- intel_enable_primary_hw_plane(plane, crtc);
+ intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_PRIMARY(pipe));
+
+ mutex_lock(&dev->struct_mutex);
+ intel_update_fbc(dev);
+ mutex_unlock(&dev->struct_mutex);
}

- intel_plane->crtc_x = state->orig_dst.x1;
- intel_plane->crtc_y = state->orig_dst.y1;
- intel_plane->crtc_w = drm_rect_width(&state->orig_dst);
- intel_plane->crtc_h = drm_rect_height(&state->orig_dst);
- intel_plane->src_x = state->orig_src.x1;
- intel_plane->src_y = state->orig_src.y1;
- intel_plane->src_w = drm_rect_width(&state->orig_src);
- intel_plane->src_h = drm_rect_height(&state->orig_src);
- intel_plane->obj = obj;
+ if (old_fb && old_fb != fb) {
+ if (intel_crtc->active)
+ intel_wait_for_vblank(dev, intel_crtc->pipe);
+
+ mutex_lock(&dev->struct_mutex);
+ intel_unpin_fb_obj(old_obj);
+ mutex_unlock(&dev->struct_mutex);
+ }

return 0;
}
--
1.9.3

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