drm/i915/fbc: fix the FBC state checking code
We'll now call intel_fbc_pre_update instead of intel_fbc_deactivate
during atomic commits. This will continue to guarantee that we
deactivate FBC and it will also update the state checking structures
at the correct time. Then, later, at the point where we were calling
intel_fbc_update, we'll only need to call intel_fbc_post_update.
Also add the proper warnings in case we don't have the appropriate
locks. Daniel mentioned the warnings will have to be removed for async
commits, but let's keep them here while we can.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453210558-7875-12-git-send-email-paulo.r.zanoni@intel.com
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 25af606..edd0999 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4799,7 +4799,7 @@
intel_update_watermarks(&crtc->base);
if (atomic->update_fbc)
- intel_fbc_update(crtc);
+ intel_fbc_post_update(crtc);
if (atomic->post_enable_primary)
intel_post_enable_primary(&crtc->base);
@@ -4815,8 +4815,8 @@
struct intel_crtc_state *pipe_config =
to_intel_crtc_state(crtc->base.state);
- if (atomic->disable_fbc)
- intel_fbc_deactivate(crtc);
+ if (atomic->update_fbc)
+ intel_fbc_pre_update(crtc);
if (crtc->atomic.disable_ips)
hsw_disable_ips(crtc);
@@ -10912,7 +10912,7 @@
mutex_unlock(&dev->struct_mutex);
intel_frontbuffer_flip_complete(dev, to_intel_plane(primary)->frontbuffer_bit);
- intel_fbc_update(crtc);
+ intel_fbc_post_update(crtc);
drm_framebuffer_unreference(work->old_fb);
BUG_ON(atomic_read(&crtc->unpin_work_count) == 0);
@@ -11712,7 +11712,7 @@
to_intel_plane(primary)->frontbuffer_bit);
mutex_unlock(&dev->struct_mutex);
- intel_fbc_deactivate(intel_crtc);
+ intel_fbc_pre_update(intel_crtc);
intel_frontbuffer_flip_prepare(dev,
to_intel_plane(primary)->frontbuffer_bit);
@@ -11901,7 +11901,6 @@
case DRM_PLANE_TYPE_PRIMARY:
intel_crtc->atomic.pre_disable_primary = turn_off;
intel_crtc->atomic.post_enable_primary = turn_on;
- intel_crtc->atomic.disable_fbc = true;
intel_crtc->atomic.update_fbc = true;
if (turn_off) {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f620023..b461d73 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -542,16 +542,17 @@
*/
struct intel_crtc_atomic_commit {
/* Sleepable operations to perform before commit */
- bool disable_fbc;
bool disable_ips;
bool pre_disable_primary;
/* Sleepable operations to perform after commit */
unsigned fb_bits;
bool wait_vblank;
- bool update_fbc;
bool post_enable_primary;
unsigned update_sprite_watermarks;
+
+ /* Sleepable operations to perform before and after commit */
+ bool update_fbc;
};
struct intel_crtc {
@@ -1330,7 +1331,8 @@
/* intel_fbc.c */
bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
void intel_fbc_deactivate(struct intel_crtc *crtc);
-void intel_fbc_update(struct intel_crtc *crtc);
+void intel_fbc_pre_update(struct intel_crtc *crtc);
+void intel_fbc_post_update(struct intel_crtc *crtc);
void intel_fbc_init(struct drm_i915_private *dev_priv);
void intel_fbc_enable(struct intel_crtc *crtc);
void intel_fbc_disable(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 61523cd..1c26d65 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -510,6 +510,7 @@
if (INTEL_INFO(dev_priv)->gen > 4)
return true;
+ /* FIXME: we don't have the appropriate state locks to do this here. */
for_each_pipe(dev_priv, pipe) {
crtc = dev_priv->pipe_to_crtc_mapping[pipe];
@@ -732,12 +733,16 @@
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
struct intel_fbc_state_cache *cache = &fbc->state_cache;
- struct intel_crtc_state *crtc_state = crtc->config;
+ struct intel_crtc_state *crtc_state =
+ to_intel_crtc_state(crtc->base.state);
struct intel_plane_state *plane_state =
to_intel_plane_state(crtc->base.primary->state);
struct drm_framebuffer *fb = plane_state->base.fb;
struct drm_i915_gem_object *obj;
+ WARN_ON(!drm_modeset_is_locked(&crtc->base.mutex));
+ WARN_ON(!drm_modeset_is_locked(&crtc->base.primary->mutex));
+
cache->crtc.mode_flags = crtc_state->base.adjusted_mode.flags;
if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
cache->crtc.hsw_bdw_pixel_rate =
@@ -896,12 +901,15 @@
return memcmp(params1, params2, sizeof(*params1)) == 0;
}
-static void intel_fbc_pre_update(struct intel_crtc *crtc)
+void intel_fbc_pre_update(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
- WARN_ON(!mutex_is_locked(&fbc->lock));
+ if (!fbc_supported(dev_priv))
+ return;
+
+ mutex_lock(&fbc->lock);
if (!multiple_pipes_ok(dev_priv)) {
set_no_fbc_reason(dev_priv, "more than one pipe active");
@@ -909,15 +917,17 @@
}
if (!fbc->enabled || fbc->crtc != crtc)
- return;
+ goto unlock;
intel_fbc_update_state_cache(crtc);
deactivate:
__intel_fbc_deactivate(dev_priv);
+unlock:
+ mutex_unlock(&fbc->lock);
}
-static void intel_fbc_post_update(struct intel_crtc *crtc)
+static void __intel_fbc_post_update(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
@@ -950,13 +960,7 @@
fbc->no_fbc_reason = "FBC enabled (active or scheduled)";
}
-/*
- * intel_fbc_update - activate/deactivate FBC as needed
- * @crtc: the CRTC that triggered the update
- *
- * This function reevaluates the overall state and activates or deactivates FBC.
- */
-void intel_fbc_update(struct intel_crtc *crtc)
+void intel_fbc_post_update(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
@@ -965,8 +969,7 @@
return;
mutex_lock(&fbc->lock);
- intel_fbc_pre_update(crtc);
- intel_fbc_post_update(crtc);
+ __intel_fbc_post_update(crtc);
mutex_unlock(&fbc->lock);
}
@@ -1020,7 +1023,7 @@
if (fbc->active)
intel_fbc_recompress(dev_priv);
else
- intel_fbc_post_update(fbc->crtc);
+ __intel_fbc_post_update(fbc->crtc);
}
mutex_unlock(&fbc->lock);