[Intel-gfx] [PATCH 1/5] drm/i915: Merge of visible and !visible paths for primary planes
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Sep 19 13:27:58 CEST 2014
On Thu, Sep 18, 2014 at 04:43:12PM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan at 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
>
> Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
> ---
> drivers/gpu/drm/i915/intel_display.c | 141 +++++++++++++++++++++--------------
> 1 file changed, 84 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 5b05ddb..1fd9b70 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -11792,12 +11792,23 @@ 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
> @@ -11809,6 +11820,8 @@ 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);
> @@ -11817,67 +11830,28 @@ 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) {
> - mutex_lock(&dev->struct_mutex);
> -
> - /*
> - * Try to pin the new fb first so that we can bail out if we
> - * fail.
> - */
> - if (plane->fb != fb) {
> - ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
> - if (ret) {
> - mutex_unlock(&dev->struct_mutex);
> - return ret;
> - }
> - }
> -
> - 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 (plane->fb != fb)
> - if (plane->fb)
> - intel_unpin_fb_obj(old_obj);
> + 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);
> -
> - } 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.
> - */
> - 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);
> - }
> - }
> - ret = intel_pipe_set_base(crtc, src->x1, src->y1, fb);
> - if (ret)
> + if (ret != 0) {
> + DRM_DEBUG_KMS("pin & fence failed\n");
> return ret;
> -
> - if (!intel_crtc->primary_enabled)
> - intel_enable_primary_hw_plane(plane, crtc);
> + }
> }
>
> + 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);
> @@ -11888,6 +11862,59 @@ intel_commit_primary_plane(struct drm_plane *plane,
> intel_plane->src_h = drm_rect_height(&state->orig_src);
> intel_plane->obj = obj;
>
> + if (intel_crtc->active) {
> + /*
> + * 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 (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);
> + }
> +
> + if (state->visible) {
> + /* FIXME: kill this fastboot hack */
> + intel_update_pipe_size(intel_crtc);
> +
Need to set primary_enabled=true here.
> + dev_priv->display.update_primary_plane(crtc, plane->fb,
> + crtc->x, crtc->y);
And you need to duplicate the BDW wait_for_vblank hack from
intel_enable_primary_hw_plane() here. But that wait should only be
done if the plane was previosuly disabled.
> + } 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);
> + }
> +
> + intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_PRIMARY(pipe));
> +
> + mutex_lock(&dev->struct_mutex);
> + intel_update_fbc(dev);
> + mutex_unlock(&dev->struct_mutex);
> + }
> +
> + if (old_fb) {
Still could unify the old_fb!=fb checks with this one.
if (old_fb && old_fb != fb) {
> + if (intel_crtc->active && old_fb != fb)
> + intel_wait_for_vblank(dev, intel_crtc->pipe);
> +
> + if (old_fb != fb) {
> + 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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--
Ville Syrjälä
Intel OTC
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