On Fri, 27 Oct 2017, Chris Wilson <ch...@chris-wilson.co.uk> wrote:
> Slightly reduce the chance for confusion by only having one variable
> instead of two to tell us when intel_fbc is enabled on a crtc.
Would be great to have a simple comment within struct intel_fbc stating
this.
BR,
Jani.
>
> Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 -
> drivers/gpu/drm/i915/intel_fbc.c | 33 +++++++++++++--------------------
> 2 files changed, 13 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 61c155cbf9d7..c0f8a13ec957 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1083,7 +1083,6 @@ struct intel_fbc {
>
> bool false_color;
>
> - bool enabled;
> bool active;
>
> bool underrun_detected;
> diff --git a/drivers/gpu/drm/i915/intel_fbc.c
> b/drivers/gpu/drm/i915/intel_fbc.c
> index 1a0f5e0c8d10..f4c3a3b9a8e6 100644
> --- a/drivers/gpu/drm/i915/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/intel_fbc.c
> @@ -472,7 +472,7 @@ static void intel_fbc_schedule_activation(struct
> intel_crtc *crtc)
> struct intel_fbc_work *work = &fbc->work;
>
> WARN_ON(!mutex_is_locked(&fbc->lock));
> - if (WARN_ON(!fbc->enabled))
> + if (WARN_ON(fbc->crtc != crtc))
> return;
>
> if (drm_crtc_vblank_get(&crtc->base)) {
> @@ -927,7 +927,7 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
> goto deactivate;
> }
>
> - if (!fbc->enabled || fbc->crtc != crtc)
> + if (fbc->crtc != crtc)
> goto unlock;
>
> intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
> @@ -946,7 +946,7 @@ static void __intel_fbc_post_update(struct intel_crtc
> *crtc)
>
> WARN_ON(!mutex_is_locked(&fbc->lock));
>
> - if (!fbc->enabled || fbc->crtc != crtc)
> + if (fbc->crtc != crtc)
> return;
>
> if (!intel_fbc_can_activate(crtc)) {
> @@ -986,7 +986,7 @@ void intel_fbc_post_update(struct intel_crtc *crtc)
>
> static unsigned int intel_fbc_get_frontbuffer_bit(struct intel_fbc *fbc)
> {
> - if (fbc->enabled)
> + if (fbc->crtc)
> return to_intel_plane(fbc->crtc->base.primary)->frontbuffer_bit;
> else
> return fbc->possible_framebuffer_bits;
> @@ -1008,7 +1008,7 @@ void intel_fbc_invalidate(struct drm_i915_private
> *dev_priv,
>
> fbc->busy_bits |= intel_fbc_get_frontbuffer_bit(fbc) & frontbuffer_bits;
>
> - if (fbc->enabled && fbc->busy_bits)
> + if (fbc->crtc && fbc->busy_bits)
> intel_fbc_deactivate(dev_priv);
>
> mutex_unlock(&fbc->lock);
> @@ -1029,7 +1029,7 @@ void intel_fbc_flush(struct drm_i915_private *dev_priv,
> if (origin == ORIGIN_GTT || origin == ORIGIN_FLIP)
> goto out;
>
> - if (!fbc->busy_bits && fbc->enabled &&
> + if (!fbc->busy_bits && fbc->crtc &&
> (frontbuffer_bits & intel_fbc_get_frontbuffer_bit(fbc))) {
> if (fbc->active)
> intel_fbc_recompress(dev_priv);
> @@ -1129,20 +1129,17 @@ void intel_fbc_enable(struct intel_crtc *crtc,
>
> mutex_lock(&fbc->lock);
>
> - if (fbc->enabled) {
> - WARN_ON(fbc->crtc == NULL);
> - if (fbc->crtc == crtc) {
> - WARN_ON(!crtc_state->enable_fbc);
> - WARN_ON(fbc->active);
> - }
> - goto out;
> + if (fbc->crtc == crtc) {
> + WARN_ON(!crtc_state->enable_fbc);
> + WARN_ON(fbc->active);
> }
> + if (fbc->crtc)
> + goto out;
>
> if (!crtc_state->enable_fbc)
> goto out;
>
> WARN_ON(fbc->active);
> - WARN_ON(fbc->crtc != NULL);
>
> intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
> if (intel_fbc_alloc_cfb(crtc)) {
> @@ -1153,7 +1150,6 @@ void intel_fbc_enable(struct intel_crtc *crtc,
> DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
> fbc->no_fbc_reason = "FBC enabled but not active yet\n";
>
> - fbc->enabled = true;
> fbc->crtc = crtc;
> out:
> mutex_unlock(&fbc->lock);
> @@ -1172,7 +1168,6 @@ static void __intel_fbc_disable(struct drm_i915_private
> *dev_priv)
> struct intel_crtc *crtc = fbc->crtc;
>
> WARN_ON(!mutex_is_locked(&fbc->lock));
> - WARN_ON(!fbc->enabled);
> WARN_ON(fbc->active);
> WARN_ON(crtc->active);
>
> @@ -1180,7 +1175,6 @@ static void __intel_fbc_disable(struct drm_i915_private
> *dev_priv)
>
> __intel_fbc_cleanup_cfb(dev_priv);
>
> - fbc->enabled = false;
> fbc->crtc = NULL;
> }
>
> @@ -1220,7 +1214,7 @@ void intel_fbc_global_disable(struct drm_i915_private
> *dev_priv)
> return;
>
> mutex_lock(&fbc->lock);
> - if (fbc->enabled)
> + if (fbc->crtc)
> __intel_fbc_disable(dev_priv);
> mutex_unlock(&fbc->lock);
>
> @@ -1236,7 +1230,7 @@ static void intel_fbc_underrun_work_fn(struct
> work_struct *work)
> mutex_lock(&fbc->lock);
>
> /* Maybe we were scheduled twice. */
> - if (fbc->underrun_detected || !fbc->enabled)
> + if (fbc->underrun_detected || !fbc->crtc)
> goto out;
>
> DRM_DEBUG_KMS("Disabling FBC due to FIFO underrun.\n");
> @@ -1351,7 +1345,6 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
> INIT_WORK(&fbc->work.work, intel_fbc_work_fn);
> INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
> mutex_init(&fbc->lock);
> - fbc->enabled = false;
> fbc->active = false;
> fbc->work.scheduled = false;
--
Jani Nikula, Intel Open Source Technology Center
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