[PATCH 00/13] drm/i915/fbc: Fix FBC for glk+

[PATCH 00/13] drm/i915/fbc: Fix FBC for glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Implement the missing w/a for back to back FBC disable + plane
update on glk+. The scariest part of this is that we now start
to use flip nuke so that we can avoid the w/a (as it would cost
us one extra frame for every plane update). Hopefully my "can
we flip nuke safely?" check is good enough.

There's a bit of cleanup mixed in since there was all kinds of
crap in my way. The state of the code is still not pretty but
seemed to work well enough in my limited testing.

Entire series availalbe here:
git://github.com/vsyrjala/linux.git glk_fbc_wa

Cc: Daniel Drake <drake@endlessm.com>,
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>,
Cc: Jian-Hong Pan <jian-hong@endlessm.com>,
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Ville Syrjälä (13):
  drm/i915/fbc: Disable fbc by default on all glk+
  drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
  drm/i915: Relocate intel_crtc_active()
  drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
  drm/i915/fbc: Precompute gen9 cfb stride w/a
  drm/i915/fbc: Track plane visibility
  drm/i915/fbc: Store fence_id direction in fbc cache/params
  drm/i915/fbc: Make fence_id optional for i965gm
  drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
  drm/i915/fbc: Nuke fbc.enabled
  drm/i915/fbc: Start using flip nuke
  drm/i915/fbc: Wait for vblank after FBC disable on glk+
  drm/i915/fbc: Enable fbc by default on glk+ once again

 drivers/gpu/drm/i915/display/intel_display.c |  25 +-
 drivers/gpu/drm/i915/display/intel_display.h |   1 -
 drivers/gpu/drm/i915/display/intel_fbc.c     | 249 +++++++++----------
 drivers/gpu/drm/i915/display/intel_fbc.h     |   3 +-
 drivers/gpu/drm/i915/i915_drv.h              |  14 +-
 drivers/gpu/drm/i915/intel_pm.c              |  19 ++
 6 files changed, 150 insertions(+), 161 deletions(-)

-- 
2.23.0

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[Intel-gfx] [PATCH 00/13] drm/i915/fbc: Fix FBC for glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Implement the missing w/a for back to back FBC disable + plane
update on glk+. The scariest part of this is that we now start
to use flip nuke so that we can avoid the w/a (as it would cost
us one extra frame for every plane update). Hopefully my "can
we flip nuke safely?" check is good enough.

There's a bit of cleanup mixed in since there was all kinds of
crap in my way. The state of the code is still not pretty but
seemed to work well enough in my limited testing.

Entire series availalbe here:
git://github.com/vsyrjala/linux.git glk_fbc_wa

Cc: Daniel Drake <drake@endlessm.com>,
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>,
Cc: Jian-Hong Pan <jian-hong@endlessm.com>,
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Ville Syrjälä (13):
  drm/i915/fbc: Disable fbc by default on all glk+
  drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
  drm/i915: Relocate intel_crtc_active()
  drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
  drm/i915/fbc: Precompute gen9 cfb stride w/a
  drm/i915/fbc: Track plane visibility
  drm/i915/fbc: Store fence_id direction in fbc cache/params
  drm/i915/fbc: Make fence_id optional for i965gm
  drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
  drm/i915/fbc: Nuke fbc.enabled
  drm/i915/fbc: Start using flip nuke
  drm/i915/fbc: Wait for vblank after FBC disable on glk+
  drm/i915/fbc: Enable fbc by default on glk+ once again

 drivers/gpu/drm/i915/display/intel_display.c |  25 +-
 drivers/gpu/drm/i915/display/intel_display.h |   1 -
 drivers/gpu/drm/i915/display/intel_fbc.c     | 249 +++++++++----------
 drivers/gpu/drm/i915/display/intel_fbc.h     |   3 +-
 drivers/gpu/drm/i915/i915_drv.h              |  14 +-
 drivers/gpu/drm/i915/intel_pm.c              |  19 ++
 6 files changed, 150 insertions(+), 161 deletions(-)

-- 
2.23.0

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[PATCH 01/13] drm/i915/fbc: Disable fbc by default on all glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We're missing a workaround in the fbc code for all glk+ platforms
which can cause corruption around the top of the screen. So
enabling fbc by default is a bad idea. I'm not keen to backport
the w/a so let's start by disabling fbc by default on all glk+.
We'll lift the restriction once the w/a is in place.

Cc: stable@vger.kernel.org
Cc: Daniel Drake <drake@endlessm.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jian-Hong Pan <jian-hong@endlessm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 92c7eb243559..3cc1f4b4b5a3 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1284,7 +1284,7 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
 		return 0;
 
 	/* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */
-	if (IS_GEMINILAKE(dev_priv))
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
 		return 0;
 
 	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
-- 
2.23.0

[Intel-gfx] [PATCH 01/13] drm/i915/fbc: Disable fbc by default on all glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We're missing a workaround in the fbc code for all glk+ platforms
which can cause corruption around the top of the screen. So
enabling fbc by default is a bad idea. I'm not keen to backport
the w/a so let's start by disabling fbc by default on all glk+.
We'll lift the restriction once the w/a is in place.

Cc: stable@vger.kernel.org
Cc: Daniel Drake <drake@endlessm.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jian-Hong Pan <jian-hong@endlessm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 92c7eb243559..3cc1f4b4b5a3 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1284,7 +1284,7 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
 		return 0;
 
 	/* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */
-	if (IS_GEMINILAKE(dev_priv))
+	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
 		return 0;
 
 	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
-- 
2.23.0

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[PATCH 02/13] drm/i915/fbc: Nuke bogus single pipe fbc1 restriction

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Not sure where the single pipe only restriction came for fbc1.
Nothing I can see that would prevent this.

v2: Nuke no_fbc_on_multiple_pipes() too

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  2 -
 drivers/gpu/drm/i915/display/intel_fbc.c     | 52 --------------------
 drivers/gpu/drm/i915/display/intel_fbc.h     |  1 -
 drivers/gpu/drm/i915/i915_drv.h              |  1 -
 4 files changed, 56 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 53dc310a5f6d..d4ca0bc4b260 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -17869,8 +17869,6 @@ intel_modeset_setup_hw_state(struct drm_device *dev,
 	}
 
 	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
-
-	intel_fbc_init_pipe_state(dev_priv);
 }
 
 void intel_display_resume(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 3cc1f4b4b5a3..2b64b172407d 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -50,11 +50,6 @@ static inline bool fbc_supported(struct drm_i915_private *dev_priv)
 	return HAS_FBC(dev_priv);
 }
 
-static inline bool no_fbc_on_multiple_pipes(struct drm_i915_private *dev_priv)
-{
-	return INTEL_GEN(dev_priv) <= 3;
-}
-
 /*
  * In some platforms where the CRTC's x:0/y:0 coordinates doesn't match the
  * frontbuffer's x:0/y:0 coordinates we lie to the hardware about the plane's
@@ -419,25 +414,6 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 	fbc->no_fbc_reason = reason;
 }
 
-static bool multiple_pipes_ok(struct intel_crtc *crtc,
-			      struct intel_plane_state *plane_state)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_fbc *fbc = &dev_priv->fbc;
-	enum pipe pipe = crtc->pipe;
-
-	/* Don't even bother tracking anything we don't need. */
-	if (!no_fbc_on_multiple_pipes(dev_priv))
-		return true;
-
-	if (plane_state->uapi.visible)
-		fbc->visible_pipes_mask |= (1 << pipe);
-	else
-		fbc->visible_pipes_mask &= ~(1 << pipe);
-
-	return (fbc->visible_pipes_mask & ~(1 << pipe)) != 0;
-}
-
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
 				      int size,
@@ -867,18 +843,12 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (!multiple_pipes_ok(crtc, plane_state)) {
-		reason = "more than one pipe active";
-		goto deactivate;
-	}
-
 	if (!fbc->enabled || fbc->crtc != crtc)
 		goto unlock;
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-deactivate:
 	intel_fbc_deactivate(dev_priv, reason);
 unlock:
 	mutex_unlock(&fbc->lock);
@@ -1244,28 +1214,6 @@ void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv)
 	schedule_work(&fbc->underrun_work);
 }
 
-/**
- * intel_fbc_init_pipe_state - initialize FBC's CRTC visibility tracking
- * @dev_priv: i915 device instance
- *
- * The FBC code needs to track CRTC visibility since the older platforms can't
- * have FBC enabled while multiple pipes are used. This function does the
- * initial setup at driver load to make sure FBC is matching the real hardware.
- */
-void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv)
-{
-	struct intel_crtc *crtc;
-
-	/* Don't even bother tracking anything if we don't need. */
-	if (!no_fbc_on_multiple_pipes(dev_priv))
-		return;
-
-	for_each_intel_crtc(&dev_priv->drm, crtc)
-		if (intel_crtc_active(crtc) &&
-		    crtc->base.primary->state->visible)
-			dev_priv->fbc.visible_pipes_mask |= (1 << crtc->pipe);
-}
-
 /*
  * The DDX driver changes its behavior depending on the value it reads from
  * i915.enable_fbc, so sanitize it by translating the default value into either
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
index 50272eda8d43..ba8eeefd4d9a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.h
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -24,7 +24,6 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_plane_state *plane_state);
 void intel_fbc_post_update(struct intel_crtc *crtc);
 void intel_fbc_init(struct drm_i915_private *dev_priv);
-void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
 void intel_fbc_enable(struct intel_crtc *crtc,
 		      struct intel_crtc_state *crtc_state,
 		      struct intel_plane_state *plane_state);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index fdae5a919bc8..ebf17b69e6ce 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -366,7 +366,6 @@ struct intel_fbc {
 	unsigned threshold;
 	unsigned int possible_framebuffer_bits;
 	unsigned int busy_bits;
-	unsigned int visible_pipes_mask;
 	struct intel_crtc *crtc;
 
 	struct drm_mm_node compressed_fb;
-- 
2.23.0

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[Intel-gfx] [PATCH 02/13] drm/i915/fbc: Nuke bogus single pipe fbc1 restriction

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Not sure where the single pipe only restriction came for fbc1.
Nothing I can see that would prevent this.

v2: Nuke no_fbc_on_multiple_pipes() too

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  2 -
 drivers/gpu/drm/i915/display/intel_fbc.c     | 52 --------------------
 drivers/gpu/drm/i915/display/intel_fbc.h     |  1 -
 drivers/gpu/drm/i915/i915_drv.h              |  1 -
 4 files changed, 56 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 53dc310a5f6d..d4ca0bc4b260 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -17869,8 +17869,6 @@ intel_modeset_setup_hw_state(struct drm_device *dev,
 	}
 
 	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT, wakeref);
-
-	intel_fbc_init_pipe_state(dev_priv);
 }
 
 void intel_display_resume(struct drm_device *dev)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 3cc1f4b4b5a3..2b64b172407d 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -50,11 +50,6 @@ static inline bool fbc_supported(struct drm_i915_private *dev_priv)
 	return HAS_FBC(dev_priv);
 }
 
-static inline bool no_fbc_on_multiple_pipes(struct drm_i915_private *dev_priv)
-{
-	return INTEL_GEN(dev_priv) <= 3;
-}
-
 /*
  * In some platforms where the CRTC's x:0/y:0 coordinates doesn't match the
  * frontbuffer's x:0/y:0 coordinates we lie to the hardware about the plane's
@@ -419,25 +414,6 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 	fbc->no_fbc_reason = reason;
 }
 
-static bool multiple_pipes_ok(struct intel_crtc *crtc,
-			      struct intel_plane_state *plane_state)
-{
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-	struct intel_fbc *fbc = &dev_priv->fbc;
-	enum pipe pipe = crtc->pipe;
-
-	/* Don't even bother tracking anything we don't need. */
-	if (!no_fbc_on_multiple_pipes(dev_priv))
-		return true;
-
-	if (plane_state->uapi.visible)
-		fbc->visible_pipes_mask |= (1 << pipe);
-	else
-		fbc->visible_pipes_mask &= ~(1 << pipe);
-
-	return (fbc->visible_pipes_mask & ~(1 << pipe)) != 0;
-}
-
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
 				      int size,
@@ -867,18 +843,12 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (!multiple_pipes_ok(crtc, plane_state)) {
-		reason = "more than one pipe active";
-		goto deactivate;
-	}
-
 	if (!fbc->enabled || fbc->crtc != crtc)
 		goto unlock;
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-deactivate:
 	intel_fbc_deactivate(dev_priv, reason);
 unlock:
 	mutex_unlock(&fbc->lock);
@@ -1244,28 +1214,6 @@ void intel_fbc_handle_fifo_underrun_irq(struct drm_i915_private *dev_priv)
 	schedule_work(&fbc->underrun_work);
 }
 
-/**
- * intel_fbc_init_pipe_state - initialize FBC's CRTC visibility tracking
- * @dev_priv: i915 device instance
- *
- * The FBC code needs to track CRTC visibility since the older platforms can't
- * have FBC enabled while multiple pipes are used. This function does the
- * initial setup at driver load to make sure FBC is matching the real hardware.
- */
-void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv)
-{
-	struct intel_crtc *crtc;
-
-	/* Don't even bother tracking anything if we don't need. */
-	if (!no_fbc_on_multiple_pipes(dev_priv))
-		return;
-
-	for_each_intel_crtc(&dev_priv->drm, crtc)
-		if (intel_crtc_active(crtc) &&
-		    crtc->base.primary->state->visible)
-			dev_priv->fbc.visible_pipes_mask |= (1 << crtc->pipe);
-}
-
 /*
  * The DDX driver changes its behavior depending on the value it reads from
  * i915.enable_fbc, so sanitize it by translating the default value into either
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
index 50272eda8d43..ba8eeefd4d9a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.h
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -24,7 +24,6 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_plane_state *plane_state);
 void intel_fbc_post_update(struct intel_crtc *crtc);
 void intel_fbc_init(struct drm_i915_private *dev_priv);
-void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv);
 void intel_fbc_enable(struct intel_crtc *crtc,
 		      struct intel_crtc_state *crtc_state,
 		      struct intel_plane_state *plane_state);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index fdae5a919bc8..ebf17b69e6ce 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -366,7 +366,6 @@ struct intel_fbc {
 	unsigned threshold;
 	unsigned int possible_framebuffer_bits;
 	unsigned int busy_bits;
-	unsigned int visible_pipes_mask;
 	struct intel_crtc *crtc;
 
 	struct drm_mm_node compressed_fb;
-- 
2.23.0

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[PATCH 03/13] drm/i915: Relocate intel_crtc_active()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Move intel_crtc_active() next to its only remaining
user (pre-g4x wm code).

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 19 -------------------
 drivers/gpu/drm/i915/display/intel_display.h |  1 -
 drivers/gpu/drm/i915/intel_pm.c              | 19 +++++++++++++++++++
 3 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d4ca0bc4b260..d592b7284406 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1040,25 +1040,6 @@ bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
 				  NULL, best_clock);
 }
 
-bool intel_crtc_active(struct intel_crtc *crtc)
-{
-	/* Be paranoid as we can arrive here with only partial
-	 * state retrieved from the hardware during setup.
-	 *
-	 * We can ditch the adjusted_mode.crtc_clock check as soon
-	 * as Haswell has gained clock readout/fastboot support.
-	 *
-	 * We can ditch the crtc->primary->state->fb check as soon as we can
-	 * properly reconstruct framebuffers.
-	 *
-	 * FIXME: The intel_crtc->active here should be switched to
-	 * crtc->state->active once we have proper CRTC states wired up
-	 * for atomic.
-	 */
-	return crtc->active && crtc->base.primary->state->fb &&
-		crtc->config->hw.adjusted_mode.crtc_clock;
-}
-
 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 					     enum pipe pipe)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index a5ec5eeff056..d18dc260fe83 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -558,7 +558,6 @@ bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
 			struct dpll *best_clock);
 int chv_calc_dpll_params(int refclk, struct dpll *pll_clock);
 
-bool intel_crtc_active(struct intel_crtc *crtc);
 bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state);
 void hsw_enable_ips(const struct intel_crtc_state *crtc_state);
 void hsw_disable_ips(const struct intel_crtc_state *crtc_state);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5aad9d49a528..eb54110119d6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -814,6 +814,25 @@ static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
 		return plane_state->uapi.visible;
 }
 
+static bool intel_crtc_active(struct intel_crtc *crtc)
+{
+	/* Be paranoid as we can arrive here with only partial
+	 * state retrieved from the hardware during setup.
+	 *
+	 * We can ditch the adjusted_mode.crtc_clock check as soon
+	 * as Haswell has gained clock readout/fastboot support.
+	 *
+	 * We can ditch the crtc->primary->state->fb check as soon as we can
+	 * properly reconstruct framebuffers.
+	 *
+	 * FIXME: The intel_crtc->active here should be switched to
+	 * crtc->state->active once we have proper CRTC states wired up
+	 * for atomic.
+	 */
+	return crtc->active && crtc->base.primary->state->fb &&
+		crtc->config->hw.adjusted_mode.crtc_clock;
+}
+
 static struct intel_crtc *single_enabled_crtc(struct drm_i915_private *dev_priv)
 {
 	struct intel_crtc *crtc, *enabled = NULL;
-- 
2.23.0

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[Intel-gfx] [PATCH 03/13] drm/i915: Relocate intel_crtc_active()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Move intel_crtc_active() next to its only remaining
user (pre-g4x wm code).

Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 19 -------------------
 drivers/gpu/drm/i915/display/intel_display.h |  1 -
 drivers/gpu/drm/i915/intel_pm.c              | 19 +++++++++++++++++++
 3 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d4ca0bc4b260..d592b7284406 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1040,25 +1040,6 @@ bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
 				  NULL, best_clock);
 }
 
-bool intel_crtc_active(struct intel_crtc *crtc)
-{
-	/* Be paranoid as we can arrive here with only partial
-	 * state retrieved from the hardware during setup.
-	 *
-	 * We can ditch the adjusted_mode.crtc_clock check as soon
-	 * as Haswell has gained clock readout/fastboot support.
-	 *
-	 * We can ditch the crtc->primary->state->fb check as soon as we can
-	 * properly reconstruct framebuffers.
-	 *
-	 * FIXME: The intel_crtc->active here should be switched to
-	 * crtc->state->active once we have proper CRTC states wired up
-	 * for atomic.
-	 */
-	return crtc->active && crtc->base.primary->state->fb &&
-		crtc->config->hw.adjusted_mode.crtc_clock;
-}
-
 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 					     enum pipe pipe)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index a5ec5eeff056..d18dc260fe83 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -558,7 +558,6 @@ bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
 			struct dpll *best_clock);
 int chv_calc_dpll_params(int refclk, struct dpll *pll_clock);
 
-bool intel_crtc_active(struct intel_crtc *crtc);
 bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state);
 void hsw_enable_ips(const struct intel_crtc_state *crtc_state);
 void hsw_disable_ips(const struct intel_crtc_state *crtc_state);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5aad9d49a528..eb54110119d6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -814,6 +814,25 @@ static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
 		return plane_state->uapi.visible;
 }
 
+static bool intel_crtc_active(struct intel_crtc *crtc)
+{
+	/* Be paranoid as we can arrive here with only partial
+	 * state retrieved from the hardware during setup.
+	 *
+	 * We can ditch the adjusted_mode.crtc_clock check as soon
+	 * as Haswell has gained clock readout/fastboot support.
+	 *
+	 * We can ditch the crtc->primary->state->fb check as soon as we can
+	 * properly reconstruct framebuffers.
+	 *
+	 * FIXME: The intel_crtc->active here should be switched to
+	 * crtc->state->active once we have proper CRTC states wired up
+	 * for atomic.
+	 */
+	return crtc->active && crtc->base.primary->state->fb &&
+		crtc->config->hw.adjusted_mode.crtc_clock;
+}
+
 static struct intel_crtc *single_enabled_crtc(struct drm_i915_private *dev_priv)
 {
 	struct intel_crtc *crtc, *enabled = NULL;
-- 
2.23.0

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[PATCH 04/13] drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We don't want to use the FBC hardware render tracking so let's not
enable it. To use the hw tracking properly we'd anyway need to
integrate this into the command submissing path as the register is
context saved, and if rendering happens via the ppgtt we'd have
to configure it with the ppgtt address instead of the ggtt address.
Easier to use software tracking instead.

Note that on pre-ilk we can't actually disable render tracking.
However we can't rely on it because it requires that DSPSURF to
match the render target address, and since we play tricks
with DSPSURF that may not be the case. Hence we shall rely on
software render tracking on all platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 2b64b172407d..eefa5a88b304 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -248,8 +248,6 @@ static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
 	}
 
 	I915_WRITE(ILK_DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
-	I915_WRITE(ILK_FBC_RT_BASE,
-		   i915_ggtt_offset(params->vma) | ILK_FBC_RT_VALID);
 	/* enable it... */
 	I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
 
-- 
2.23.0

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[Intel-gfx] [PATCH 04/13] drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

We don't want to use the FBC hardware render tracking so let's not
enable it. To use the hw tracking properly we'd anyway need to
integrate this into the command submissing path as the register is
context saved, and if rendering happens via the ppgtt we'd have
to configure it with the ppgtt address instead of the ggtt address.
Easier to use software tracking instead.

Note that on pre-ilk we can't actually disable render tracking.
However we can't rely on it because it requires that DSPSURF to
match the render target address, and since we play tricks
with DSPSURF that may not be the case. Hence we shall rely on
software render tracking on all platforms.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 2b64b172407d..eefa5a88b304 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -248,8 +248,6 @@ static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
 	}
 
 	I915_WRITE(ILK_DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
-	I915_WRITE(ILK_FBC_RT_BASE,
-		   i915_ggtt_offset(params->vma) | ILK_FBC_RT_VALID);
 	/* enable it... */
 	I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
 
-- 
2.23.0

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[PATCH 05/13] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 33 ++++++++++++++----------
 drivers/gpu/drm/i915/i915_drv.h          |  3 ++-
 2 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..5ed8487db387 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,20 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[Intel-gfx] [PATCH 05/13] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 33 ++++++++++++++----------
 drivers/gpu/drm/i915/i915_drv.h          |  3 ++-
 2 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..5ed8487db387 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,20 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[PATCH 06/13] drm/i915/fbc: Track plane visibility

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Currently the code (ab)uses cache->vma to indicate the plane
visibility. I want to nuke that so let's add a dedicated boolean
for this.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 21 ++++++++++-----------
 drivers/gpu/drm/i915/i915_drv.h          |  1 +
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 5ed8487db387..642074990726 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -634,8 +634,9 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	struct intel_fbc_state_cache *cache = &fbc->state_cache;
 	struct drm_framebuffer *fb = plane_state->hw.fb;
 
-	cache->vma = NULL;
-	cache->flags = 0;
+	cache->plane.visible = plane_state->uapi.visible;
+	if (!cache->plane.visible)
+		return;
 
 	cache->crtc.mode_flags = crtc_state->hw.adjusted_mode.flags;
 	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
@@ -649,16 +650,12 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	 */
 	cache->plane.src_w = drm_rect_width(&plane_state->uapi.src) >> 16;
 	cache->plane.src_h = drm_rect_height(&plane_state->uapi.src) >> 16;
-	cache->plane.visible = plane_state->uapi.visible;
 	cache->plane.adjusted_x = plane_state->color_plane[0].x;
 	cache->plane.adjusted_y = plane_state->color_plane[0].y;
 	cache->plane.y = plane_state->uapi.src.y1 >> 16;
 
 	cache->plane.pixel_blend_mode = plane_state->hw.pixel_blend_mode;
 
-	if (!cache->plane.visible)
-		return;
-
 	cache->fb.format = fb->format;
 	cache->fb.stride = fb->pitches[0];
 
@@ -674,6 +671,11 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct intel_fbc_state_cache *cache = &fbc->state_cache;
 
+	if (!cache->plane.visible) {
+		fbc->no_fbc_reason = "primary plane not visible";
+		return false;
+	}
+
 	/* We don't need to use a state cache here since this information is
 	 * global for all CRTC.
 	 */
@@ -682,11 +684,6 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 		return false;
 	}
 
-	if (!cache->vma) {
-		fbc->no_fbc_reason = "primary plane not visible";
-		return false;
-	}
-
 	if (cache->crtc.mode_flags & DRM_MODE_FLAG_INTERLACE) {
 		fbc->no_fbc_reason = "incompatible mode";
 		return false;
@@ -820,6 +817,8 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
 	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
+
+	params->plane_visible = cache->plane.visible;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7b468297e9b0..06fa8fbd5ae9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -444,6 +444,7 @@ struct intel_fbc {
 
 		int cfb_size;
 		u16 gen9_wa_cfb_stride;
+		bool plane_visible;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[Intel-gfx] [PATCH 06/13] drm/i915/fbc: Track plane visibility

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Currently the code (ab)uses cache->vma to indicate the plane
visibility. I want to nuke that so let's add a dedicated boolean
for this.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 21 ++++++++++-----------
 drivers/gpu/drm/i915/i915_drv.h          |  1 +
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 5ed8487db387..642074990726 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -634,8 +634,9 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	struct intel_fbc_state_cache *cache = &fbc->state_cache;
 	struct drm_framebuffer *fb = plane_state->hw.fb;
 
-	cache->vma = NULL;
-	cache->flags = 0;
+	cache->plane.visible = plane_state->uapi.visible;
+	if (!cache->plane.visible)
+		return;
 
 	cache->crtc.mode_flags = crtc_state->hw.adjusted_mode.flags;
 	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
@@ -649,16 +650,12 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	 */
 	cache->plane.src_w = drm_rect_width(&plane_state->uapi.src) >> 16;
 	cache->plane.src_h = drm_rect_height(&plane_state->uapi.src) >> 16;
-	cache->plane.visible = plane_state->uapi.visible;
 	cache->plane.adjusted_x = plane_state->color_plane[0].x;
 	cache->plane.adjusted_y = plane_state->color_plane[0].y;
 	cache->plane.y = plane_state->uapi.src.y1 >> 16;
 
 	cache->plane.pixel_blend_mode = plane_state->hw.pixel_blend_mode;
 
-	if (!cache->plane.visible)
-		return;
-
 	cache->fb.format = fb->format;
 	cache->fb.stride = fb->pitches[0];
 
@@ -674,6 +671,11 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct intel_fbc_state_cache *cache = &fbc->state_cache;
 
+	if (!cache->plane.visible) {
+		fbc->no_fbc_reason = "primary plane not visible";
+		return false;
+	}
+
 	/* We don't need to use a state cache here since this information is
 	 * global for all CRTC.
 	 */
@@ -682,11 +684,6 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 		return false;
 	}
 
-	if (!cache->vma) {
-		fbc->no_fbc_reason = "primary plane not visible";
-		return false;
-	}
-
 	if (cache->crtc.mode_flags & DRM_MODE_FLAG_INTERLACE) {
 		fbc->no_fbc_reason = "incompatible mode";
 		return false;
@@ -820,6 +817,8 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
 	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
+
+	params->plane_visible = cache->plane.visible;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7b468297e9b0..06fa8fbd5ae9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -444,6 +444,7 @@ struct intel_fbc {
 
 		int cfb_size;
 		u16 gen9_wa_cfb_stride;
+		bool plane_visible;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[PATCH 07/13] drm/i915/fbc: Store fence_id direction in fbc cache/params

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Rather than playing around with vma+flags let's just grab
the fence id from within and stash that directly in the fbc
cache/params.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 33 +++++++++++++-----------
 drivers/gpu/drm/i915/i915_drv.h          |  8 ++----
 2 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 642074990726..707b9d0cdc9b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -151,7 +151,7 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 	if (IS_I945GM(dev_priv))
 		fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
 	fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
-	fbc_ctl |= params->vma->fence->id;
+	fbc_ctl |= params->fence_id;
 	I915_WRITE(FBC_CONTROL, fbc_ctl);
 }
 
@@ -171,8 +171,8 @@ static void g4x_fbc_activate(struct drm_i915_private *dev_priv)
 	else
 		dpfc_ctl |= DPFC_CTL_LIMIT_1X;
 
-	if (params->flags & PLANE_HAS_FENCE) {
-		dpfc_ctl |= DPFC_CTL_FENCE_EN | params->vma->fence->id;
+	if (params->fence_id >= 0) {
+		dpfc_ctl |= DPFC_CTL_FENCE_EN | params->fence_id;
 		I915_WRITE(DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
 	} else {
 		I915_WRITE(DPFC_FENCE_YOFF, 0);
@@ -229,14 +229,14 @@ static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
 		break;
 	}
 
-	if (params->flags & PLANE_HAS_FENCE) {
+	if (params->fence_id >= 0) {
 		dpfc_ctl |= DPFC_CTL_FENCE_EN;
 		if (IS_GEN(dev_priv, 5))
-			dpfc_ctl |= params->vma->fence->id;
+			dpfc_ctl |= params->fence_id;
 		if (IS_GEN(dev_priv, 6)) {
 			I915_WRITE(SNB_DPFC_CTL_SA,
 				   SNB_CPU_FENCE_ENABLE |
-				   params->vma->fence->id);
+				   params->fence_id);
 			I915_WRITE(DPFC_CPU_FENCE_OFFSET,
 				   params->crtc.fence_y_offset);
 		}
@@ -309,11 +309,11 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 		break;
 	}
 
-	if (params->flags & PLANE_HAS_FENCE) {
+	if (params->fence_id >= 0) {
 		dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN;
 		I915_WRITE(SNB_DPFC_CTL_SA,
 			   SNB_CPU_FENCE_ENABLE |
-			   params->vma->fence->id);
+			   params->fence_id);
 		I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset);
 	} else {
 		I915_WRITE(SNB_DPFC_CTL_SA,0);
@@ -659,10 +659,14 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	cache->fb.format = fb->format;
 	cache->fb.stride = fb->pitches[0];
 
-	cache->vma = plane_state->vma;
-	cache->flags = plane_state->flags;
-	if (WARN_ON(cache->flags & PLANE_HAS_FENCE && !cache->vma->fence))
-		cache->flags &= ~PLANE_HAS_FENCE;
+	WARN_ON(plane_state->flags & PLANE_HAS_FENCE &&
+		!plane_state->vma->fence);
+
+	if (plane_state->flags & PLANE_HAS_FENCE &&
+	    plane_state->vma->fence)
+		cache->fence_id = plane_state->vma->fence->id;
+	else
+		cache->fence_id = -1;
 }
 
 static bool intel_fbc_can_activate(struct intel_crtc *crtc)
@@ -707,7 +711,7 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 	 * For now this will effecively disable FBC with 90/270 degree
 	 * rotation.
 	 */
-	if (!(cache->flags & PLANE_HAS_FENCE)) {
+	if (cache->fence_id < 0) {
 		fbc->no_fbc_reason = "framebuffer not tiled or fenced";
 		return false;
 	}
@@ -804,8 +808,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	 * zero. */
 	memset(params, 0, sizeof(*params));
 
-	params->vma = cache->vma;
-	params->flags = cache->flags;
+	params->fence_id = cache->fence_id;
 
 	params->crtc.pipe = crtc->pipe;
 	params->crtc.i9xx_plane = to_intel_plane(crtc->base.primary)->i9xx_plane;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 06fa8fbd5ae9..852c0204fa0b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -386,9 +386,6 @@ struct intel_fbc {
 	 * these problems.
 	 */
 	struct intel_fbc_state_cache {
-		struct i915_vma *vma;
-		unsigned long flags;
-
 		struct {
 			unsigned int mode_flags;
 			u32 hsw_bdw_pixel_rate;
@@ -418,6 +415,7 @@ struct intel_fbc {
 			unsigned int stride;
 		} fb;
 		u16 gen9_wa_cfb_stride;
+		s8 fence_id;
 	} state_cache;
 
 	/*
@@ -428,9 +426,6 @@ struct intel_fbc {
 	 * are supposed to read from it in order to program the registers.
 	 */
 	struct intel_fbc_reg_params {
-		struct i915_vma *vma;
-		unsigned long flags;
-
 		struct {
 			enum pipe pipe;
 			enum i9xx_plane_id i9xx_plane;
@@ -444,6 +439,7 @@ struct intel_fbc {
 
 		int cfb_size;
 		u16 gen9_wa_cfb_stride;
+		s8 fence_id;
 		bool plane_visible;
 	} params;
 
-- 
2.23.0

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[Intel-gfx] [PATCH 07/13] drm/i915/fbc: Store fence_id direction in fbc cache/params

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Rather than playing around with vma+flags let's just grab
the fence id from within and stash that directly in the fbc
cache/params.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 33 +++++++++++++-----------
 drivers/gpu/drm/i915/i915_drv.h          |  8 ++----
 2 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 642074990726..707b9d0cdc9b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -151,7 +151,7 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 	if (IS_I945GM(dev_priv))
 		fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
 	fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
-	fbc_ctl |= params->vma->fence->id;
+	fbc_ctl |= params->fence_id;
 	I915_WRITE(FBC_CONTROL, fbc_ctl);
 }
 
@@ -171,8 +171,8 @@ static void g4x_fbc_activate(struct drm_i915_private *dev_priv)
 	else
 		dpfc_ctl |= DPFC_CTL_LIMIT_1X;
 
-	if (params->flags & PLANE_HAS_FENCE) {
-		dpfc_ctl |= DPFC_CTL_FENCE_EN | params->vma->fence->id;
+	if (params->fence_id >= 0) {
+		dpfc_ctl |= DPFC_CTL_FENCE_EN | params->fence_id;
 		I915_WRITE(DPFC_FENCE_YOFF, params->crtc.fence_y_offset);
 	} else {
 		I915_WRITE(DPFC_FENCE_YOFF, 0);
@@ -229,14 +229,14 @@ static void ilk_fbc_activate(struct drm_i915_private *dev_priv)
 		break;
 	}
 
-	if (params->flags & PLANE_HAS_FENCE) {
+	if (params->fence_id >= 0) {
 		dpfc_ctl |= DPFC_CTL_FENCE_EN;
 		if (IS_GEN(dev_priv, 5))
-			dpfc_ctl |= params->vma->fence->id;
+			dpfc_ctl |= params->fence_id;
 		if (IS_GEN(dev_priv, 6)) {
 			I915_WRITE(SNB_DPFC_CTL_SA,
 				   SNB_CPU_FENCE_ENABLE |
-				   params->vma->fence->id);
+				   params->fence_id);
 			I915_WRITE(DPFC_CPU_FENCE_OFFSET,
 				   params->crtc.fence_y_offset);
 		}
@@ -309,11 +309,11 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 		break;
 	}
 
-	if (params->flags & PLANE_HAS_FENCE) {
+	if (params->fence_id >= 0) {
 		dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN;
 		I915_WRITE(SNB_DPFC_CTL_SA,
 			   SNB_CPU_FENCE_ENABLE |
-			   params->vma->fence->id);
+			   params->fence_id);
 		I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset);
 	} else {
 		I915_WRITE(SNB_DPFC_CTL_SA,0);
@@ -659,10 +659,14 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 	cache->fb.format = fb->format;
 	cache->fb.stride = fb->pitches[0];
 
-	cache->vma = plane_state->vma;
-	cache->flags = plane_state->flags;
-	if (WARN_ON(cache->flags & PLANE_HAS_FENCE && !cache->vma->fence))
-		cache->flags &= ~PLANE_HAS_FENCE;
+	WARN_ON(plane_state->flags & PLANE_HAS_FENCE &&
+		!plane_state->vma->fence);
+
+	if (plane_state->flags & PLANE_HAS_FENCE &&
+	    plane_state->vma->fence)
+		cache->fence_id = plane_state->vma->fence->id;
+	else
+		cache->fence_id = -1;
 }
 
 static bool intel_fbc_can_activate(struct intel_crtc *crtc)
@@ -707,7 +711,7 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc)
 	 * For now this will effecively disable FBC with 90/270 degree
 	 * rotation.
 	 */
-	if (!(cache->flags & PLANE_HAS_FENCE)) {
+	if (cache->fence_id < 0) {
 		fbc->no_fbc_reason = "framebuffer not tiled or fenced";
 		return false;
 	}
@@ -804,8 +808,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	 * zero. */
 	memset(params, 0, sizeof(*params));
 
-	params->vma = cache->vma;
-	params->flags = cache->flags;
+	params->fence_id = cache->fence_id;
 
 	params->crtc.pipe = crtc->pipe;
 	params->crtc.i9xx_plane = to_intel_plane(crtc->base.primary)->i9xx_plane;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 06fa8fbd5ae9..852c0204fa0b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -386,9 +386,6 @@ struct intel_fbc {
 	 * these problems.
 	 */
 	struct intel_fbc_state_cache {
-		struct i915_vma *vma;
-		unsigned long flags;
-
 		struct {
 			unsigned int mode_flags;
 			u32 hsw_bdw_pixel_rate;
@@ -418,6 +415,7 @@ struct intel_fbc {
 			unsigned int stride;
 		} fb;
 		u16 gen9_wa_cfb_stride;
+		s8 fence_id;
 	} state_cache;
 
 	/*
@@ -428,9 +426,6 @@ struct intel_fbc {
 	 * are supposed to read from it in order to program the registers.
 	 */
 	struct intel_fbc_reg_params {
-		struct i915_vma *vma;
-		unsigned long flags;
-
 		struct {
 			enum pipe pipe;
 			enum i9xx_plane_id i9xx_plane;
@@ -444,6 +439,7 @@ struct intel_fbc {
 
 		int cfb_size;
 		u16 gen9_wa_cfb_stride;
+		s8 fence_id;
 		bool plane_visible;
 	} params;
 
-- 
2.23.0

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[PATCH 08/13] drm/i915/fbc: Make fence_id optional for i965gm

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

i965gm no longer needs the fence for scanout so we should be
do what we do for ctg+ and only configure a fence for FBC
when we have one.

In theory this should do nothing atm on account of
intel_fbc_can_activate() requiring the fence, but since
we do this for g4x+ let's do it for i965gm as well. We
may want to relax the requirements at some point and allow
FBC without a fence.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 707b9d0cdc9b..7b59a98cbd21 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -138,8 +138,10 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 		u32 fbc_ctl2;
 
 		/* Set it up... */
-		fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
+		fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM;
 		fbc_ctl2 |= FBC_CTL_PLANE(params->crtc.i9xx_plane);
+		if (params->fence_id >= 0)
+			fbc_ctl2 |= FBC_CTL_CPU_FENCE;
 		I915_WRITE(FBC_CONTROL2, fbc_ctl2);
 		I915_WRITE(FBC_FENCE_OFF, params->crtc.fence_y_offset);
 	}
@@ -151,7 +153,8 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 	if (IS_I945GM(dev_priv))
 		fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
 	fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
-	fbc_ctl |= params->fence_id;
+	if (params->fence_id >= 0)
+		fbc_ctl |= params->fence_id;
 	I915_WRITE(FBC_CONTROL, fbc_ctl);
 }
 
-- 
2.23.0

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[Intel-gfx] [PATCH 08/13] drm/i915/fbc: Make fence_id optional for i965gm

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

i965gm no longer needs the fence for scanout so we should be
do what we do for ctg+ and only configure a fence for FBC
when we have one.

In theory this should do nothing atm on account of
intel_fbc_can_activate() requiring the fence, but since
we do this for g4x+ let's do it for i965gm as well. We
may want to relax the requirements at some point and allow
FBC without a fence.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 707b9d0cdc9b..7b59a98cbd21 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -138,8 +138,10 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 		u32 fbc_ctl2;
 
 		/* Set it up... */
-		fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
+		fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM;
 		fbc_ctl2 |= FBC_CTL_PLANE(params->crtc.i9xx_plane);
+		if (params->fence_id >= 0)
+			fbc_ctl2 |= FBC_CTL_CPU_FENCE;
 		I915_WRITE(FBC_CONTROL2, fbc_ctl2);
 		I915_WRITE(FBC_FENCE_OFF, params->crtc.fence_y_offset);
 	}
@@ -151,7 +153,8 @@ static void i8xx_fbc_activate(struct drm_i915_private *dev_priv)
 	if (IS_I945GM(dev_priv))
 		fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
 	fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
-	fbc_ctl |= params->fence_id;
+	if (params->fence_id >= 0)
+		fbc_ctl |= params->fence_id;
 	I915_WRITE(FBC_CONTROL, fbc_ctl);
 }
 
-- 
2.23.0

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[PATCH 09/13] drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Replace the 'gen9 && !glk' with the slightly more obvious
'gen9_bc || bxt'.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 7b59a98cbd21..75d75fa32544 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -281,7 +281,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 	int threshold = dev_priv->fbc.threshold;
 
 	/* Display WA #0529: skl, kbl, bxt. */
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv)) {
+	if (IS_GEN9_BC(dev_priv) || IS_BROXTON(dev_priv)) {
 		u32 val = I915_READ(CHICKEN_MISC_4);
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
@@ -1084,7 +1084,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 		goto out;
 	}
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	if ((IS_GEN9_BC(dev_priv) || IS_BROXTON(dev_priv)) &&
 	    fb->modifier != I915_FORMAT_MOD_X_TILED)
 		cache->gen9_wa_cfb_stride =
 			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
-- 
2.23.0

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[Intel-gfx] [PATCH 09/13] drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Replace the 'gen9 && !glk' with the slightly more obvious
'gen9_bc || bxt'.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 7b59a98cbd21..75d75fa32544 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -281,7 +281,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 	int threshold = dev_priv->fbc.threshold;
 
 	/* Display WA #0529: skl, kbl, bxt. */
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv)) {
+	if (IS_GEN9_BC(dev_priv) || IS_BROXTON(dev_priv)) {
 		u32 val = I915_READ(CHICKEN_MISC_4);
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
@@ -1084,7 +1084,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 		goto out;
 	}
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	if ((IS_GEN9_BC(dev_priv) || IS_BROXTON(dev_priv)) &&
 	    fb->modifier != I915_FORMAT_MOD_X_TILED)
 		cache->gen9_wa_cfb_stride =
 			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
-- 
2.23.0

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[PATCH 10/13] drm/i915/fbc: Nuke fbc.enabled

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

fbc.enabled == (fbc.crtc != NULL), so let's just nuke fbc.enabled.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 23 +++++++++--------------
 drivers/gpu/drm/i915/i915_drv.h          |  1 -
 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 75d75fa32544..476733ab0586 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -840,7 +840,7 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (!fbc->enabled || fbc->crtc != crtc)
+	if (fbc->crtc != crtc)
 		goto unlock;
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
@@ -864,14 +864,13 @@ 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->crtc);
 	WARN_ON(fbc->active);
 
 	DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 
 	__intel_fbc_cleanup_cfb(dev_priv);
 
-	fbc->enabled = false;
 	fbc->crtc = NULL;
 }
 
@@ -882,7 +881,7 @@ 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;
 
 	fbc->flip_pending = false;
@@ -922,7 +921,7 @@ 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;
@@ -944,7 +943,7 @@ 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, "frontbuffer write");
 
 	mutex_unlock(&fbc->lock);
@@ -965,7 +964,7 @@ 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);
@@ -1061,8 +1060,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (fbc->enabled) {
-		WARN_ON(fbc->crtc == NULL);
+	if (fbc->crtc) {
 		if (fbc->crtc == crtc) {
 			WARN_ON(!crtc_state->enable_fbc);
 			WARN_ON(fbc->active);
@@ -1074,7 +1072,6 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 		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(dev_priv,
@@ -1094,7 +1091,6 @@ 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);
@@ -1134,7 +1130,7 @@ void intel_fbc_global_disable(struct drm_i915_private *dev_priv)
 		return;
 
 	mutex_lock(&fbc->lock);
-	if (fbc->enabled) {
+	if (fbc->crtc) {
 		WARN_ON(fbc->crtc->active);
 		__intel_fbc_disable(dev_priv);
 	}
@@ -1150,7 +1146,7 @@ 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");
@@ -1273,7 +1269,6 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
 
 	INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
 	mutex_init(&fbc->lock);
-	fbc->enabled = false;
 	fbc->active = false;
 
 	if (!drm_mm_initialized(&dev_priv->mm.stolen))
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 852c0204fa0b..0666612a6ec5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -373,7 +373,6 @@ struct intel_fbc {
 
 	bool false_color;
 
-	bool enabled;
 	bool active;
 	bool flip_pending;
 
-- 
2.23.0

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[Intel-gfx] [PATCH 10/13] drm/i915/fbc: Nuke fbc.enabled

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

fbc.enabled == (fbc.crtc != NULL), so let's just nuke fbc.enabled.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 23 +++++++++--------------
 drivers/gpu/drm/i915/i915_drv.h          |  1 -
 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 75d75fa32544..476733ab0586 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -840,7 +840,7 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (!fbc->enabled || fbc->crtc != crtc)
+	if (fbc->crtc != crtc)
 		goto unlock;
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
@@ -864,14 +864,13 @@ 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->crtc);
 	WARN_ON(fbc->active);
 
 	DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 
 	__intel_fbc_cleanup_cfb(dev_priv);
 
-	fbc->enabled = false;
 	fbc->crtc = NULL;
 }
 
@@ -882,7 +881,7 @@ 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;
 
 	fbc->flip_pending = false;
@@ -922,7 +921,7 @@ 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;
@@ -944,7 +943,7 @@ 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, "frontbuffer write");
 
 	mutex_unlock(&fbc->lock);
@@ -965,7 +964,7 @@ 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);
@@ -1061,8 +1060,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 
 	mutex_lock(&fbc->lock);
 
-	if (fbc->enabled) {
-		WARN_ON(fbc->crtc == NULL);
+	if (fbc->crtc) {
 		if (fbc->crtc == crtc) {
 			WARN_ON(!crtc_state->enable_fbc);
 			WARN_ON(fbc->active);
@@ -1074,7 +1072,6 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 		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(dev_priv,
@@ -1094,7 +1091,6 @@ 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);
@@ -1134,7 +1130,7 @@ void intel_fbc_global_disable(struct drm_i915_private *dev_priv)
 		return;
 
 	mutex_lock(&fbc->lock);
-	if (fbc->enabled) {
+	if (fbc->crtc) {
 		WARN_ON(fbc->crtc->active);
 		__intel_fbc_disable(dev_priv);
 	}
@@ -1150,7 +1146,7 @@ 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");
@@ -1273,7 +1269,6 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
 
 	INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
 	mutex_init(&fbc->lock);
-	fbc->enabled = false;
 	fbc->active = false;
 
 	if (!drm_mm_initialized(&dev_priv->mm.stolen))
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 852c0204fa0b..0666612a6ec5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -373,7 +373,6 @@ struct intel_fbc {
 
 	bool false_color;
 
-	bool enabled;
 	bool active;
 	bool flip_pending;
 
-- 
2.23.0

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[PATCH 11/13] drm/i915/fbc: Start using flip nuke

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The hardware automagically nukes the cfb on flip. We can use
that whenever the plane/crtc configuration doesn't change too
much. Let's hook that up.

We'll need this for glk+ since we need to introduce an extra
vblank wait after FBC disable. As we're currently disabling
FBC around all plane updates we'd slow them down by an extra
frame. Not a great user experience when your fps is always
capped at vrefres/2. With flip nuke we don't need the extra
vblank wait.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 50 ++++++++++++++++++------
 1 file changed, 39 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 476733ab0586..b2424b9a369b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -68,7 +68,7 @@ static unsigned int get_crtc_fence_y_offset(struct intel_fbc *fbc)
  * write to the PLANE_SIZE register. For BDW-, the hardware looks at the value
  * we wrote to PIPESRC.
  */
-static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache,
+static void intel_fbc_get_plane_source_size(const struct intel_fbc_state_cache *cache,
 					    int *width, int *height)
 {
 	if (width)
@@ -78,7 +78,7 @@ static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache,
 }
 
 static int intel_fbc_calculate_cfb_size(struct drm_i915_private *dev_priv,
-					struct intel_fbc_state_cache *cache)
+					const struct intel_fbc_state_cache *cache)
 {
 	int lines;
 
@@ -827,6 +827,38 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	params->plane_visible = cache->plane.visible;
 }
 
+static bool intel_fbc_can_flip_nuke(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_fbc *fbc = &dev_priv->fbc;
+	const struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct intel_fbc_reg_params *params = &fbc->params;
+
+	if (drm_atomic_crtc_needs_modeset(&crtc_state->uapi))
+		return false;
+
+	if (!params->plane_visible)
+		return false;
+
+	if (!intel_fbc_can_activate(crtc))
+		return false;
+
+	if (params->fb.format != cache->fb.format)
+		return false;
+
+	if (params->fb.stride != cache->fb.stride)
+		return false;
+
+	if (params->cfb_size != intel_fbc_calculate_cfb_size(dev_priv, cache))
+		return false;
+
+	if (params->gen9_wa_cfb_stride != cache->gen9_wa_cfb_stride)
+		return false;
+
+	return true;
+}
+
 void intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state)
@@ -846,7 +878,8 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-	intel_fbc_deactivate(dev_priv, reason);
+	if (!intel_fbc_can_flip_nuke(crtc_state))
+		intel_fbc_deactivate(dev_priv, reason);
 unlock:
 	mutex_unlock(&fbc->lock);
 }
@@ -885,7 +918,6 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc)
 		return;
 
 	fbc->flip_pending = false;
-	WARN_ON(fbc->active);
 
 	if (!i915_modparams.enable_fbc) {
 		intel_fbc_deactivate(dev_priv, "disabled at runtime per module param");
@@ -899,10 +931,9 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc)
 	if (!intel_fbc_can_activate(crtc))
 		return;
 
-	if (!fbc->busy_bits) {
-		intel_fbc_deactivate(dev_priv, "FBC enabled (active or scheduled)");
+	if (!fbc->busy_bits)
 		intel_fbc_hw_activate(dev_priv);
-	} else
+	else
 		intel_fbc_deactivate(dev_priv, "frontbuffer write");
 }
 
@@ -1061,10 +1092,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	mutex_lock(&fbc->lock);
 
 	if (fbc->crtc) {
-		if (fbc->crtc == crtc) {
-			WARN_ON(!crtc_state->enable_fbc);
-			WARN_ON(fbc->active);
-		}
+		WARN_ON(fbc->crtc == crtc && !crtc_state->enable_fbc);
 		goto out;
 	}
 
-- 
2.23.0

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[Intel-gfx] [PATCH 11/13] drm/i915/fbc: Start using flip nuke

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The hardware automagically nukes the cfb on flip. We can use
that whenever the plane/crtc configuration doesn't change too
much. Let's hook that up.

We'll need this for glk+ since we need to introduce an extra
vblank wait after FBC disable. As we're currently disabling
FBC around all plane updates we'd slow them down by an extra
frame. Not a great user experience when your fps is always
capped at vrefres/2. With flip nuke we don't need the extra
vblank wait.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 50 ++++++++++++++++++------
 1 file changed, 39 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 476733ab0586..b2424b9a369b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -68,7 +68,7 @@ static unsigned int get_crtc_fence_y_offset(struct intel_fbc *fbc)
  * write to the PLANE_SIZE register. For BDW-, the hardware looks at the value
  * we wrote to PIPESRC.
  */
-static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache,
+static void intel_fbc_get_plane_source_size(const struct intel_fbc_state_cache *cache,
 					    int *width, int *height)
 {
 	if (width)
@@ -78,7 +78,7 @@ static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache,
 }
 
 static int intel_fbc_calculate_cfb_size(struct drm_i915_private *dev_priv,
-					struct intel_fbc_state_cache *cache)
+					const struct intel_fbc_state_cache *cache)
 {
 	int lines;
 
@@ -827,6 +827,38 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 	params->plane_visible = cache->plane.visible;
 }
 
+static bool intel_fbc_can_flip_nuke(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	const struct intel_fbc *fbc = &dev_priv->fbc;
+	const struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct intel_fbc_reg_params *params = &fbc->params;
+
+	if (drm_atomic_crtc_needs_modeset(&crtc_state->uapi))
+		return false;
+
+	if (!params->plane_visible)
+		return false;
+
+	if (!intel_fbc_can_activate(crtc))
+		return false;
+
+	if (params->fb.format != cache->fb.format)
+		return false;
+
+	if (params->fb.stride != cache->fb.stride)
+		return false;
+
+	if (params->cfb_size != intel_fbc_calculate_cfb_size(dev_priv, cache))
+		return false;
+
+	if (params->gen9_wa_cfb_stride != cache->gen9_wa_cfb_stride)
+		return false;
+
+	return true;
+}
+
 void intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state)
@@ -846,7 +878,8 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-	intel_fbc_deactivate(dev_priv, reason);
+	if (!intel_fbc_can_flip_nuke(crtc_state))
+		intel_fbc_deactivate(dev_priv, reason);
 unlock:
 	mutex_unlock(&fbc->lock);
 }
@@ -885,7 +918,6 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc)
 		return;
 
 	fbc->flip_pending = false;
-	WARN_ON(fbc->active);
 
 	if (!i915_modparams.enable_fbc) {
 		intel_fbc_deactivate(dev_priv, "disabled at runtime per module param");
@@ -899,10 +931,9 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc)
 	if (!intel_fbc_can_activate(crtc))
 		return;
 
-	if (!fbc->busy_bits) {
-		intel_fbc_deactivate(dev_priv, "FBC enabled (active or scheduled)");
+	if (!fbc->busy_bits)
 		intel_fbc_hw_activate(dev_priv);
-	} else
+	else
 		intel_fbc_deactivate(dev_priv, "frontbuffer write");
 }
 
@@ -1061,10 +1092,7 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	mutex_lock(&fbc->lock);
 
 	if (fbc->crtc) {
-		if (fbc->crtc == crtc) {
-			WARN_ON(!crtc_state->enable_fbc);
-			WARN_ON(fbc->active);
-		}
+		WARN_ON(fbc->crtc == crtc && !crtc_state->enable_fbc);
 		goto out;
 	}
 
-- 
2.23.0

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[PATCH 12/13] drm/i915/fbc: Wait for vblank after FBC disable on glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

On glk+ the hardware gets confused if we disable FBC while
it's recompressing and we perform a plane update during the
same frame. The result is that top of the screen gets corrupted.

We can avoid that by giving the hardware enough time to finish
the FBC disable before we touch the plane registers. Ie. we need
an extra vblank wait after FBC disable.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  4 ++-
 drivers/gpu/drm/i915/display/intel_fbc.c     | 26 +++++++++++++++++---
 drivers/gpu/drm/i915/display/intel_fbc.h     |  2 +-
 3 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d592b7284406..3210a0f00009 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6105,7 +6105,9 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
 			intel_atomic_get_new_plane_state(intel_state,
 							 to_intel_plane(primary));
 
-		intel_fbc_pre_update(crtc, pipe_config, new_primary_state);
+		if (intel_fbc_pre_update(crtc, pipe_config, new_primary_state))
+			intel_wait_for_vblank(dev_priv, crtc->pipe);
+
 		/*
 		 * Gen2 reports pipe underruns whenever all planes are disabled.
 		 * So disable underrun reporting before all the planes get disabled.
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index b2424b9a369b..994fdd0842c3 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -859,16 +859,17 @@ static bool intel_fbc_can_flip_nuke(const struct intel_crtc_state *crtc_state)
 	return true;
 }
 
-void intel_fbc_pre_update(struct intel_crtc *crtc,
+bool intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	const char *reason = "update pending";
+	bool need_vblank_wait = false;
 
 	if (!fbc_supported(dev_priv))
-		return;
+		return need_vblank_wait;
 
 	mutex_lock(&fbc->lock);
 
@@ -878,10 +879,29 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-	if (!intel_fbc_can_flip_nuke(crtc_state))
+	if (!intel_fbc_can_flip_nuke(crtc_state)) {
 		intel_fbc_deactivate(dev_priv, reason);
+
+		/*
+		 * Display WA #1198: glk+
+		 * Need an extra vblank wait between FBC disable and most plane
+		 * updates. Bspec says this is only needed for plane disable, but
+		 * that is not true. Touching most plane registers will cause the
+		 * corruption to appear. Also SKL/derivatives do not seem to be
+		 * affected.
+		 *
+		 * TODO: could optimize this a bit by sampling the frame
+		 * counter when we disable FBC (if it was already done earlier)
+		 * and skipping the extra vblank wait before the plane update
+		 * if at least one frame has already passed.
+		 */
+		if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+			need_vblank_wait = true;
+	}
 unlock:
 	mutex_unlock(&fbc->lock);
+
+	return need_vblank_wait;
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
index ba8eeefd4d9a..9a2f1094cbda 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.h
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -19,7 +19,7 @@ struct intel_plane_state;
 void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
 			   struct intel_atomic_state *state);
 bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
-void intel_fbc_pre_update(struct intel_crtc *crtc,
+bool intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state);
 void intel_fbc_post_update(struct intel_crtc *crtc);
-- 
2.23.0

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[Intel-gfx] [PATCH 12/13] drm/i915/fbc: Wait for vblank after FBC disable on glk+

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

On glk+ the hardware gets confused if we disable FBC while
it's recompressing and we perform a plane update during the
same frame. The result is that top of the screen gets corrupted.

We can avoid that by giving the hardware enough time to finish
the FBC disable before we touch the plane registers. Ie. we need
an extra vblank wait after FBC disable.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c |  4 ++-
 drivers/gpu/drm/i915/display/intel_fbc.c     | 26 +++++++++++++++++---
 drivers/gpu/drm/i915/display/intel_fbc.h     |  2 +-
 3 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index d592b7284406..3210a0f00009 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6105,7 +6105,9 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
 			intel_atomic_get_new_plane_state(intel_state,
 							 to_intel_plane(primary));
 
-		intel_fbc_pre_update(crtc, pipe_config, new_primary_state);
+		if (intel_fbc_pre_update(crtc, pipe_config, new_primary_state))
+			intel_wait_for_vblank(dev_priv, crtc->pipe);
+
 		/*
 		 * Gen2 reports pipe underruns whenever all planes are disabled.
 		 * So disable underrun reporting before all the planes get disabled.
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index b2424b9a369b..994fdd0842c3 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -859,16 +859,17 @@ static bool intel_fbc_can_flip_nuke(const struct intel_crtc_state *crtc_state)
 	return true;
 }
 
-void intel_fbc_pre_update(struct intel_crtc *crtc,
+bool intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	const char *reason = "update pending";
+	bool need_vblank_wait = false;
 
 	if (!fbc_supported(dev_priv))
-		return;
+		return need_vblank_wait;
 
 	mutex_lock(&fbc->lock);
 
@@ -878,10 +879,29 @@ void intel_fbc_pre_update(struct intel_crtc *crtc,
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
 	fbc->flip_pending = true;
 
-	if (!intel_fbc_can_flip_nuke(crtc_state))
+	if (!intel_fbc_can_flip_nuke(crtc_state)) {
 		intel_fbc_deactivate(dev_priv, reason);
+
+		/*
+		 * Display WA #1198: glk+
+		 * Need an extra vblank wait between FBC disable and most plane
+		 * updates. Bspec says this is only needed for plane disable, but
+		 * that is not true. Touching most plane registers will cause the
+		 * corruption to appear. Also SKL/derivatives do not seem to be
+		 * affected.
+		 *
+		 * TODO: could optimize this a bit by sampling the frame
+		 * counter when we disable FBC (if it was already done earlier)
+		 * and skipping the extra vblank wait before the plane update
+		 * if at least one frame has already passed.
+		 */
+		if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+			need_vblank_wait = true;
+	}
 unlock:
 	mutex_unlock(&fbc->lock);
+
+	return need_vblank_wait;
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.h b/drivers/gpu/drm/i915/display/intel_fbc.h
index ba8eeefd4d9a..9a2f1094cbda 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.h
+++ b/drivers/gpu/drm/i915/display/intel_fbc.h
@@ -19,7 +19,7 @@ struct intel_plane_state;
 void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv,
 			   struct intel_atomic_state *state);
 bool intel_fbc_is_active(struct drm_i915_private *dev_priv);
-void intel_fbc_pre_update(struct intel_crtc *crtc,
+bool intel_fbc_pre_update(struct intel_crtc *crtc,
 			  struct intel_crtc_state *crtc_state,
 			  struct intel_plane_state *plane_state);
 void intel_fbc_post_update(struct intel_crtc *crtc);
-- 
2.23.0

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[PATCH 13/13] drm/i915/fbc: Enable fbc by default on glk+ once again

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Now that we have the glk+ w/a for back to back fbc disable + plane
update in place we can once more enable fbc on glk+ by default.

Cc: Daniel Drake <drake@endlessm.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jian-Hong Pan <jian-hong@endlessm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 994fdd0842c3..deee559aa84b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1283,10 +1283,6 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
 	if (!HAS_FBC(dev_priv))
 		return 0;
 
-	/* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */
-	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
-		return 0;
-
 	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
 		return 1;
 
-- 
2.23.0

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[Intel-gfx] [PATCH 13/13] drm/i915/fbc: Enable fbc by default on glk+ once again

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Now that we have the glk+ w/a for back to back fbc disable + plane
update in place we can once more enable fbc on glk+ by default.

Cc: Daniel Drake <drake@endlessm.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jian-Hong Pan <jian-hong@endlessm.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 994fdd0842c3..deee559aa84b 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1283,10 +1283,6 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv)
 	if (!HAS_FBC(dev_priv))
 		return 0;
 
-	/* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */
-	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
-		return 0;
-
 	if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
 		return 1;
 
-- 
2.23.0

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[PATCH v2 06/14] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

v2: Don't explode when crtc_state->enable_fbc lies to us

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 38 +++++++++++++++---------
 drivers/gpu/drm/i915/i915_drv.h          |  3 +-
 2 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..6a32f1eaefeb 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,25 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+
+	/* FIXME crtc_state->enable_fbc lies :( */
+	if (!cache->plane.visible)
+		goto out;
+
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[Intel-gfx] [PATCH v2 06/14] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

v2: Don't explode when crtc_state->enable_fbc lies to us

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 38 +++++++++++++++---------
 drivers/gpu/drm/i915/i915_drv.h          |  3 +-
 2 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..6a32f1eaefeb 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,25 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+
+	/* FIXME crtc_state->enable_fbc lies :( */
+	if (!cache->plane.visible)
+		goto out;
+
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

✗ Fi.CI.BAT: failure for drm/i915/fbc: Fix FBC for glk+

[Patchwork]

== Series Details ==

Series: drm/i915/fbc: Fix FBC for glk+
URL   : https://patchwork.freedesktop.org/series/70062/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_7426 -> Patchwork_15442
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_15442 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_15442, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/index.html

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_15442:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_exec_suspend@basic-s3:
    - fi-kbl-8809g:       [PASS][1] -> [DMESG-WARN][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-8809g/igt@gem_exec_suspend@basic-s3.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-8809g/igt@gem_exec_suspend@basic-s3.html

  * igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic:
    - fi-icl-y:           [PASS][3] -> [FAIL][4] +7 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-y/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-y/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-after-cursor-atomic:
    - fi-icl-u3:          [PASS][5] -> [FAIL][6] +7 similar issues
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-u3/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-u3/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
    - fi-icl-dsi:         [PASS][7] -> [FAIL][8] +7 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-dsi/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-dsi/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-before-cursor-atomic:
    - fi-icl-u2:          [PASS][9] -> [FAIL][10] +7 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-u2/igt@kms_cursor_legacy@basic-flip-before-cursor-atomic.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-u2/igt@kms_cursor_legacy@basic-flip-before-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size:
    - fi-glk-dsi:         [PASS][11] -> [FAIL][12] +7 similar issues
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-glk-dsi/igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-glk-dsi/igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size.html

  
Known issues
------------

  Here are the changes found in Patchwork_15442 that come from known issues:

### IGT changes ###

#### Possible fixes ####

  * igt@i915_selftest@live_gem_contexts:
    - fi-skl-lmem:        [DMESG-FAIL][13] -> [PASS][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-skl-lmem/igt@i915_selftest@live_gem_contexts.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-skl-lmem/igt@i915_selftest@live_gem_contexts.html

  
#### Warnings ####

  * igt@kms_flip@basic-flip-vs-modeset:
    - fi-kbl-x1275:       [DMESG-WARN][15] ([fdo#103558] / [fdo#105602]) -> [DMESG-WARN][16] ([fdo#103558] / [fdo#105602] / [fdo#105763]) +3 similar issues
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-modeset.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-modeset.html

  * igt@kms_pipe_crc_basic@read-crc-pipe-a:
    - fi-kbl-x1275:       [DMESG-WARN][17] ([fdo#103558] / [fdo#105602] / [fdo#105763]) -> [DMESG-WARN][18] ([fdo#103558] / [fdo#105602]) +7 similar issues
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-x1275/igt@kms_pipe_crc_basic@read-crc-pipe-a.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-x1275/igt@kms_pipe_crc_basic@read-crc-pipe-a.html

  
  [fdo#103558]: https://bugs.freedesktop.org/show_bug.cgi?id=103558
  [fdo#105602]: https://bugs.freedesktop.org/show_bug.cgi?id=105602
  [fdo#105763]: https://bugs.freedesktop.org/show_bug.cgi?id=105763


Participating hosts (49 -> 44)
------------------------------

  Additional (1): fi-whl-u 
  Missing    (6): fi-ilk-m540 fi-hsw-4200u fi-bsw-cyan fi-ctg-p8600 fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_7426 -> Patchwork_15442

  CI-20190529: 20190529
  CI_DRM_7426: b204d72d3485a148456e2077683974739b675b21 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5310: d1ea62b3f759f10ff6860561ba82e5c4902511d3 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_15442: a34f6796e9f9f53623b5fd1b3e77b9607fe24729 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

a34f6796e9f9 drm/i915/fbc: Enable fbc by default on glk+ once again
a3f7771b0473 drm/i915/fbc: Wait for vblank after FBC disable on glk+
2519b734bf8c drm/i915/fbc: Start using flip nuke
36d789629601 drm/i915/fbc: Nuke fbc.enabled
cff73cbedbde drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
6ded20c12dae drm/i915/fbc: Make fence_id optional for i965gm
9c533e7eec86 drm/i915/fbc: Store fence_id direction in fbc cache/params
90ad5b5335ff drm/i915/fbc: Track plane visibility
b3da3f2c675b drm/i915/fbc: Precompute gen9 cfb stride w/a
64a4197bff28 drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
938bbf57ad0e drm/i915: Relocate intel_crtc_active()
2daa6970f04a drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
834c34e40bc9 drm/i915/fbc: Disable fbc by default on all glk+

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/index.html
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] ✗ Fi.CI.BAT: failure for drm/i915/fbc: Fix FBC for glk+

[Patchwork]

== Series Details ==

Series: drm/i915/fbc: Fix FBC for glk+
URL   : https://patchwork.freedesktop.org/series/70062/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_7426 -> Patchwork_15442
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_15442 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_15442, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/index.html

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_15442:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_exec_suspend@basic-s3:
    - fi-kbl-8809g:       [PASS][1] -> [DMESG-WARN][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-8809g/igt@gem_exec_suspend@basic-s3.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-8809g/igt@gem_exec_suspend@basic-s3.html

  * igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic:
    - fi-icl-y:           [PASS][3] -> [FAIL][4] +7 similar issues
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-y/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-y/igt@kms_cursor_legacy@basic-busy-flip-before-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-after-cursor-atomic:
    - fi-icl-u3:          [PASS][5] -> [FAIL][6] +7 similar issues
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-u3/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-u3/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
    - fi-icl-dsi:         [PASS][7] -> [FAIL][8] +7 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-dsi/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-dsi/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-before-cursor-atomic:
    - fi-icl-u2:          [PASS][9] -> [FAIL][10] +7 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-icl-u2/igt@kms_cursor_legacy@basic-flip-before-cursor-atomic.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-icl-u2/igt@kms_cursor_legacy@basic-flip-before-cursor-atomic.html

  * igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size:
    - fi-glk-dsi:         [PASS][11] -> [FAIL][12] +7 similar issues
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-glk-dsi/igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-glk-dsi/igt@kms_cursor_legacy@basic-flip-before-cursor-varying-size.html

  
Known issues
------------

  Here are the changes found in Patchwork_15442 that come from known issues:

### IGT changes ###

#### Possible fixes ####

  * igt@i915_selftest@live_gem_contexts:
    - fi-skl-lmem:        [DMESG-FAIL][13] -> [PASS][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-skl-lmem/igt@i915_selftest@live_gem_contexts.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-skl-lmem/igt@i915_selftest@live_gem_contexts.html

  
#### Warnings ####

  * igt@kms_flip@basic-flip-vs-modeset:
    - fi-kbl-x1275:       [DMESG-WARN][15] ([fdo#103558] / [fdo#105602]) -> [DMESG-WARN][16] ([fdo#103558] / [fdo#105602] / [fdo#105763]) +3 similar issues
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-modeset.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-x1275/igt@kms_flip@basic-flip-vs-modeset.html

  * igt@kms_pipe_crc_basic@read-crc-pipe-a:
    - fi-kbl-x1275:       [DMESG-WARN][17] ([fdo#103558] / [fdo#105602] / [fdo#105763]) -> [DMESG-WARN][18] ([fdo#103558] / [fdo#105602]) +7 similar issues
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7426/fi-kbl-x1275/igt@kms_pipe_crc_basic@read-crc-pipe-a.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/fi-kbl-x1275/igt@kms_pipe_crc_basic@read-crc-pipe-a.html

  
  [fdo#103558]: https://bugs.freedesktop.org/show_bug.cgi?id=103558
  [fdo#105602]: https://bugs.freedesktop.org/show_bug.cgi?id=105602
  [fdo#105763]: https://bugs.freedesktop.org/show_bug.cgi?id=105763


Participating hosts (49 -> 44)
------------------------------

  Additional (1): fi-whl-u 
  Missing    (6): fi-ilk-m540 fi-hsw-4200u fi-bsw-cyan fi-ctg-p8600 fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_7426 -> Patchwork_15442

  CI-20190529: 20190529
  CI_DRM_7426: b204d72d3485a148456e2077683974739b675b21 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5310: d1ea62b3f759f10ff6860561ba82e5c4902511d3 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_15442: a34f6796e9f9f53623b5fd1b3e77b9607fe24729 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

a34f6796e9f9 drm/i915/fbc: Enable fbc by default on glk+ once again
a3f7771b0473 drm/i915/fbc: Wait for vblank after FBC disable on glk+
2519b734bf8c drm/i915/fbc: Start using flip nuke
36d789629601 drm/i915/fbc: Nuke fbc.enabled
cff73cbedbde drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
6ded20c12dae drm/i915/fbc: Make fence_id optional for i965gm
9c533e7eec86 drm/i915/fbc: Store fence_id direction in fbc cache/params
90ad5b5335ff drm/i915/fbc: Track plane visibility
b3da3f2c675b drm/i915/fbc: Precompute gen9 cfb stride w/a
64a4197bff28 drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
938bbf57ad0e drm/i915: Relocate intel_crtc_active()
2daa6970f04a drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
834c34e40bc9 drm/i915/fbc: Disable fbc by default on all glk+

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_15442/index.html
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 00/13] drm/i915/fbc: Fix FBC for glk+

[Daniel Drake]

Hi Ville,

It's great to see Intel putting attention into this, thanks!

On Wed, Nov 27, 2019 at 1:09 AM Ville Syrjala
<ville.syrjala@linux.intel.com> wrote:
> Implement the missing w/a for back to back FBC disable + plane
> update on glk+. The scariest part of this is that we now start
> to use flip nuke so that we can avoid the w/a (as it would cost
> us one extra frame for every plane update). Hopefully my "can
> we flip nuke safely?" check is good enough.

I tested on Asus E406MA which is one of the original platforms where
we were seeing the corruption at the top of the screen.

I first took your branch *without* your new patches applied, to
reconfirm the base case of FBC causing corruption.
However this didn't work as desired - FBC did not get enabled and
i915_fbc_status reported "no suitable CRTC fo FBC".
This must be a change in behaviour since we originally saw the
corruption bug a while back. I checked that skl_plane_has_fbc()
correctly marks the right plane (pipe A, primary plane) as has_fbc=1
however the loop inside intel_fbc_choose_crtc() was only considering
plane 7 (PLANE_CURSOR) and then deciding that there were no
FBC-capable planes.

I then applied your patch series and checked again. FBC still
disabled, but this time the reason is "CFB requirements changed".

I then booted with i915.fastboot=0 and now FBC is enabled. I'm unable
to reproduce the graphics corruption under this setup, so it looks
like your patches may have solved the original issue. However, it's
unfortunate that FBC will continue to remain disabled for users of
this platform, as fastboot defaults to on (and the fastboot associated
boot flicker reduction is very welcome). Do you think this point is
worth following up on?

Thanks,
Daniel
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Re: [Intel-gfx] [PATCH 00/13] drm/i915/fbc: Fix FBC for glk+

[Daniel Drake]

Hi Ville,

It's great to see Intel putting attention into this, thanks!

On Wed, Nov 27, 2019 at 1:09 AM Ville Syrjala
<ville.syrjala@linux.intel.com> wrote:
> Implement the missing w/a for back to back FBC disable + plane
> update on glk+. The scariest part of this is that we now start
> to use flip nuke so that we can avoid the w/a (as it would cost
> us one extra frame for every plane update). Hopefully my "can
> we flip nuke safely?" check is good enough.

I tested on Asus E406MA which is one of the original platforms where
we were seeing the corruption at the top of the screen.

I first took your branch *without* your new patches applied, to
reconfirm the base case of FBC causing corruption.
However this didn't work as desired - FBC did not get enabled and
i915_fbc_status reported "no suitable CRTC fo FBC".
This must be a change in behaviour since we originally saw the
corruption bug a while back. I checked that skl_plane_has_fbc()
correctly marks the right plane (pipe A, primary plane) as has_fbc=1
however the loop inside intel_fbc_choose_crtc() was only considering
plane 7 (PLANE_CURSOR) and then deciding that there were no
FBC-capable planes.

I then applied your patch series and checked again. FBC still
disabled, but this time the reason is "CFB requirements changed".

I then booted with i915.fastboot=0 and now FBC is enabled. I'm unable
to reproduce the graphics corruption under this setup, so it looks
like your patches may have solved the original issue. However, it's
unfortunate that FBC will continue to remain disabled for users of
this platform, as fastboot defaults to on (and the fastboot associated
boot flicker reduction is very welcome). Do you think this point is
worth following up on?

Thanks,
Daniel
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[PATCH v3 05/13] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

v2: Don't explode when crtc_state->enable_fbc lies to us

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 38 +++++++++++++++---------
 drivers/gpu/drm/i915/i915_drv.h          |  3 +-
 2 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..6a32f1eaefeb 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,25 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+
+	/* FIXME crtc_state->enable_fbc lies :( */
+	if (!cache->plane.visible)
+		goto out;
+
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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[Intel-gfx] [PATCH v3 05/13] drm/i915/fbc: Precompute gen9 cfb stride w/a

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Precompute the override cfb stride value so that we can check
it when determining if flip nuke can be used or not.

The hardware has 13 bits for this, so we can shrink the storage
to u16 while at it.

v2: Don't explode when crtc_state->enable_fbc lies to us

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 38 +++++++++++++++---------
 drivers/gpu/drm/i915/i915_drv.h          |  3 +-
 2 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index eefa5a88b304..6a32f1eaefeb 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -283,8 +283,7 @@ static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
 
 		val &= ~(FBC_STRIDE_OVERRIDE | FBC_STRIDE_MASK);
 
-		if (i915_gem_object_get_tiling(params->vma->obj) !=
-		    I915_TILING_X)
+		if (params->gen9_wa_cfb_stride)
 			val |= FBC_STRIDE_OVERRIDE | params->gen9_wa_cfb_stride;
 
 		I915_WRITE(CHICKEN_MISC_4, val);
@@ -414,8 +413,8 @@ static void intel_fbc_deactivate(struct drm_i915_private *dev_priv,
 
 static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+				      unsigned int size,
+				      unsigned int fb_cpp)
 {
 	int compression_threshold = 1;
 	int ret;
@@ -461,18 +460,15 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	}
 }
 
-static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
+static int intel_fbc_alloc_cfb(struct drm_i915_private *dev_priv,
+			       unsigned int size, unsigned int fb_cpp)
 {
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
 	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int size, fb_cpp, ret;
+	int ret;
 
 	WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb));
 
-	size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache);
-	fb_cpp = fbc->state_cache.fb.format->cpp[0];
-
 	ret = find_compression_threshold(dev_priv, &fbc->compressed_fb,
 					 size, fb_cpp);
 	if (!ret)
@@ -823,9 +819,7 @@ static void intel_fbc_get_reg_params(struct intel_crtc *crtc,
 
 	params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache);
 
-	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv))
-		params->gen9_wa_cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
-						32 * fbc->threshold) * 8;
+	params->gen9_wa_cfb_stride = cache->gen9_wa_cfb_stride;
 }
 
 void intel_fbc_pre_update(struct intel_crtc *crtc,
@@ -1054,6 +1048,8 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct intel_fbc *fbc = &dev_priv->fbc;
+	struct intel_fbc_state_cache *cache = &fbc->state_cache;
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
 
 	if (!fbc_supported(dev_priv))
 		return;
@@ -1076,11 +1072,25 @@ void intel_fbc_enable(struct intel_crtc *crtc,
 	WARN_ON(fbc->crtc != NULL);
 
 	intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
-	if (intel_fbc_alloc_cfb(crtc)) {
+
+	/* FIXME crtc_state->enable_fbc lies :( */
+	if (!cache->plane.visible)
+		goto out;
+
+	if (intel_fbc_alloc_cfb(dev_priv,
+				intel_fbc_calculate_cfb_size(dev_priv, cache),
+				fb->format->cpp[0])) {
 		fbc->no_fbc_reason = "not enough stolen memory";
 		goto out;
 	}
 
+	if (IS_GEN(dev_priv, 9) && !IS_GEMINILAKE(dev_priv) &&
+	    fb->modifier != I915_FORMAT_MOD_X_TILED)
+		cache->gen9_wa_cfb_stride =
+			DIV_ROUND_UP(cache->plane.src_w, 32 * fbc->threshold) * 8;
+	else
+		cache->gen9_wa_cfb_stride = 0;
+
 	DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
 	fbc->no_fbc_reason = "FBC enabled but not active yet\n";
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ebf17b69e6ce..7b468297e9b0 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -417,6 +417,7 @@ struct intel_fbc {
 			const struct drm_format_info *format;
 			unsigned int stride;
 		} fb;
+		u16 gen9_wa_cfb_stride;
 	} state_cache;
 
 	/*
@@ -442,7 +443,7 @@ struct intel_fbc {
 		} fb;
 
 		int cfb_size;
-		unsigned int gen9_wa_cfb_stride;
+		u16 gen9_wa_cfb_stride;
 	} params;
 
 	const char *no_fbc_reason;
-- 
2.23.0

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✗ Fi.CI.BUILD: failure for drm/i915/fbc: Fix FBC for glk+ (rev3)

[Patchwork]

== Series Details ==

Series: drm/i915/fbc: Fix FBC for glk+ (rev3)
URL   : https://patchwork.freedesktop.org/series/70062/
State : failure

== Summary ==

Applying: drm/i915/fbc: Disable fbc by default on all glk+
Applying: drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
Applying: drm/i915: Relocate intel_crtc_active()
Applying: drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
Applying: drm/i915/fbc: Precompute gen9 cfb stride w/a
Applying: drm/i915/fbc: Track plane visibility
Applying: drm/i915/fbc: Store fence_id direction in fbc cache/params
Applying: drm/i915/fbc: Make fence_id optional for i965gm
Applying: drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
Applying: drm/i915/fbc: Nuke fbc.enabled
error: sha1 information is lacking or useless (drivers/gpu/drm/i915/i915_drv.h).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch' to see the failed patch
Patch failed at 0010 drm/i915/fbc: Nuke fbc.enabled
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

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[Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/fbc: Fix FBC for glk+ (rev3)

[Patchwork]

== Series Details ==

Series: drm/i915/fbc: Fix FBC for glk+ (rev3)
URL   : https://patchwork.freedesktop.org/series/70062/
State : failure

== Summary ==

Applying: drm/i915/fbc: Disable fbc by default on all glk+
Applying: drm/i915/fbc: Nuke bogus single pipe fbc1 restriction
Applying: drm/i915: Relocate intel_crtc_active()
Applying: drm/i915/fbc: Remove the FBC_RT_BASE setup for ILK/SNB
Applying: drm/i915/fbc: Precompute gen9 cfb stride w/a
Applying: drm/i915/fbc: Track plane visibility
Applying: drm/i915/fbc: Store fence_id direction in fbc cache/params
Applying: drm/i915/fbc: Make fence_id optional for i965gm
Applying: drm/i915/fbc: s/gen9 && !glk/gen9_bc || bxt/
Applying: drm/i915/fbc: Nuke fbc.enabled
error: sha1 information is lacking or useless (drivers/gpu/drm/i915/i915_drv.h).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch' to see the failed patch
Patch failed at 0010 drm/i915/fbc: Nuke fbc.enabled
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

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Re: [PATCH 01/13] drm/i915/fbc: Disable fbc by default on all glk+

[Sasha Levin]

Hi,

[This is an automated email]

This commit has been processed because it contains a -stable tag.
The stable tag indicates that it's relevant for the following trees: all

The bot has tested the following trees: v5.3.13, v4.19.86, v4.14.156, v4.9.203, v4.4.203.

v5.3.13: Build OK!
v4.19.86: Failed to apply! Possible dependencies:
    Unable to calculate

v4.14.156: Failed to apply! Possible dependencies:
    Unable to calculate

v4.9.203: Failed to apply! Possible dependencies:
    1d25724b41fa ("drm/i915/fbc: disable framebuffer compression on GeminiLake")
    fd7d6c5c8f3e ("drm/i915: enable FBC on gen9+ too")

v4.4.203: Failed to apply! Possible dependencies:
    0e631adc1aef ("drm/i915: introduce is_active/activate/deactivate to the FBC terminology")
    128d735606d4 ("drm/i915: use a single intel_fbc_work struct")
    1d25724b41fa ("drm/i915/fbc: disable framebuffer compression on GeminiLake")
    30c58d5896e5 ("drm/i915: extract crtc_is_valid() on the FBC code")
    36dbc4d76918 ("drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake")
    45b32a291978 ("drm/i915: use struct intel_crtc *crtc at __intel_fbc_update()")
    571050226c5d ("drm/i915: extract fbc_on_pipe_a_only()")
    754d113304aa ("drm/i915: pass the crtc as an argument to intel_fbc_update()")
    793af070a716 ("drm/i915: remove newline from a no_fbc_reason message")
    80788a0fbbdf ("drm/i915/fbc: sanitize i915.enable_fbc during FBC init")
    913a3a6acae3 ("drm/i915/fbc: don't print no_fbc_reason to dmesg")
    a4dedd5a14a8 ("drm/i915: remove unnecessary check for crtc->primary->fb")
    ab34a7e8b55a ("drm/i915/fbc: replace frequent dev_priv->fbc.x with fbc->x")
    bf6189c6f062 ("drm/i915: change no_fbc_reason from enum to string")
    c68ae339e710 ("drm/i915: don't disable_fbc() if FBC is already disabled")
    e9c5fd26ac38 ("drm/i915: set dev_priv->fbc.crtc before scheduling the enable work")


NOTE: The patch will not be queued to stable trees until it is upstream.

How should we proceed with this patch?

-- 
Thanks,
Sasha
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Re: [Intel-gfx] [PATCH 01/13] drm/i915/fbc: Disable fbc by default on all glk+

[Sasha Levin]

Hi,

[This is an automated email]

This commit has been processed because it contains a -stable tag.
The stable tag indicates that it's relevant for the following trees: all

The bot has tested the following trees: v5.3.13, v4.19.86, v4.14.156, v4.9.203, v4.4.203.

v5.3.13: Build OK!
v4.19.86: Failed to apply! Possible dependencies:
    Unable to calculate

v4.14.156: Failed to apply! Possible dependencies:
    Unable to calculate

v4.9.203: Failed to apply! Possible dependencies:
    1d25724b41fa ("drm/i915/fbc: disable framebuffer compression on GeminiLake")
    fd7d6c5c8f3e ("drm/i915: enable FBC on gen9+ too")

v4.4.203: Failed to apply! Possible dependencies:
    0e631adc1aef ("drm/i915: introduce is_active/activate/deactivate to the FBC terminology")
    128d735606d4 ("drm/i915: use a single intel_fbc_work struct")
    1d25724b41fa ("drm/i915/fbc: disable framebuffer compression on GeminiLake")
    30c58d5896e5 ("drm/i915: extract crtc_is_valid() on the FBC code")
    36dbc4d76918 ("drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake")
    45b32a291978 ("drm/i915: use struct intel_crtc *crtc at __intel_fbc_update()")
    571050226c5d ("drm/i915: extract fbc_on_pipe_a_only()")
    754d113304aa ("drm/i915: pass the crtc as an argument to intel_fbc_update()")
    793af070a716 ("drm/i915: remove newline from a no_fbc_reason message")
    80788a0fbbdf ("drm/i915/fbc: sanitize i915.enable_fbc during FBC init")
    913a3a6acae3 ("drm/i915/fbc: don't print no_fbc_reason to dmesg")
    a4dedd5a14a8 ("drm/i915: remove unnecessary check for crtc->primary->fb")
    ab34a7e8b55a ("drm/i915/fbc: replace frequent dev_priv->fbc.x with fbc->x")
    bf6189c6f062 ("drm/i915: change no_fbc_reason from enum to string")
    c68ae339e710 ("drm/i915: don't disable_fbc() if FBC is already disabled")
    e9c5fd26ac38 ("drm/i915: set dev_priv->fbc.crtc before scheduling the enable work")


NOTE: The patch will not be queued to stable trees until it is upstream.

How should we proceed with this patch?

-- 
Thanks,
Sasha
_______________________________________________
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