drm/i915: Remove cs based page flip support.

With mmio flips now available on all platforms it's time to remove
support for cs flips.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463490484-19540-13-git-send-email-maarten.lankhorst@linux.intel.com
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>

1 files changed, 22 insertions, 98 deletions

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3242a37..5513c4c 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -136,6 +136,12 @@ static const u32 hpd_bxt[HPD_NUM_PINS] = {
 	POSTING_READ(type##IIR); \
 } while (0)
 
+static void
+intel_finish_page_flip_cs(struct drm_i915_private *dev_priv, unsigned pipe)
+{
+	DRM_DEBUG_KMS("Finished page flip\n");
+}
+
 /*
  * We should clear IMR at preinstall/uninstall, and just check at postinstall.
  */
@@ -1631,16 +1637,11 @@ static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
 	}
 }
 
-static bool intel_pipe_handle_vblank(struct drm_i915_private *dev_priv,
+static void intel_pipe_handle_vblank(struct drm_i915_private *dev_priv,
 				     enum pipe pipe)
 {
-	bool ret;
-
-	ret = drm_handle_vblank(dev_priv->dev, pipe);
-	if (ret)
+	if (drm_handle_vblank(dev_priv->dev, pipe))
 		intel_finish_page_flip_mmio(dev_priv, pipe);
-
-	return ret;
 }
 
 static void valleyview_pipestat_irq_ack(struct drm_i915_private *dev_priv,
@@ -1707,9 +1708,8 @@ static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
 	enum pipe pipe;
 
 	for_each_pipe(dev_priv, pipe) {
-		if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
-		    intel_pipe_handle_vblank(dev_priv, pipe))
-			intel_check_page_flip(dev_priv, pipe);
+		if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
+			intel_pipe_handle_vblank(dev_priv, pipe);
 
 		if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
 			intel_finish_page_flip_cs(dev_priv, pipe);
@@ -2155,9 +2155,8 @@ static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
 		DRM_ERROR("Poison interrupt\n");
 
 	for_each_pipe(dev_priv, pipe) {
-		if (de_iir & DE_PIPE_VBLANK(pipe) &&
-		    intel_pipe_handle_vblank(dev_priv, pipe))
-			intel_check_page_flip(dev_priv, pipe);
+		if (de_iir & DE_PIPE_VBLANK(pipe))
+			intel_pipe_handle_vblank(dev_priv, pipe);
 
 		if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
 			intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
@@ -2206,9 +2205,8 @@ static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
 		intel_opregion_asle_intr(dev_priv);
 
 	for_each_pipe(dev_priv, pipe) {
-		if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)) &&
-		    intel_pipe_handle_vblank(dev_priv, pipe))
-			intel_check_page_flip(dev_priv, pipe);
+		if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)))
+			intel_pipe_handle_vblank(dev_priv, pipe);
 
 		/* plane/pipes map 1:1 on ilk+ */
 		if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
@@ -2407,9 +2405,8 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 		ret = IRQ_HANDLED;
 		I915_WRITE(GEN8_DE_PIPE_IIR(pipe), iir);
 
-		if (iir & GEN8_PIPE_VBLANK &&
-		    intel_pipe_handle_vblank(dev_priv, pipe))
-			intel_check_page_flip(dev_priv, pipe);
+		if (iir & GEN8_PIPE_VBLANK)
+			intel_pipe_handle_vblank(dev_priv, pipe);
 
 		flip_done = iir;
 		if (INTEL_INFO(dev_priv)->gen >= 9)
@@ -3973,37 +3970,6 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
 	return 0;
 }
 
-/*
- * Returns true when a page flip has completed.
- */
-static bool i8xx_handle_vblank(struct drm_i915_private *dev_priv,
-			       int plane, int pipe, u32 iir)
-{
-	u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
-
-	if (!intel_pipe_handle_vblank(dev_priv, pipe))
-		return false;
-
-	if ((iir & flip_pending) == 0)
-		goto check_page_flip;
-
-	/* We detect FlipDone by looking for the change in PendingFlip from '1'
-	 * to '0' on the following vblank, i.e. IIR has the Pendingflip
-	 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
-	 * the flip is completed (no longer pending). Since this doesn't raise
-	 * an interrupt per se, we watch for the change at vblank.
-	 */
-	if (I915_READ16(ISR) & flip_pending)
-		goto check_page_flip;
-
-	intel_finish_page_flip_cs(dev_priv, pipe);
-	return true;
-
-check_page_flip:
-	intel_check_page_flip(dev_priv, pipe);
-	return false;
-}
-
 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
 {
 	struct drm_device *dev = arg;
@@ -4056,13 +4022,8 @@ static irqreturn_t i8xx_irq_handler(int irq, void *arg)
 			notify_ring(&dev_priv->engine[RCS]);
 
 		for_each_pipe(dev_priv, pipe) {
-			int plane = pipe;
-			if (HAS_FBC(dev_priv))
-				plane = !plane;
-
-			if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
-			    i8xx_handle_vblank(dev_priv, plane, pipe, iir))
-				flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
+			if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
+				intel_pipe_handle_vblank(dev_priv, pipe);
 
 			if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
 				i9xx_pipe_crc_irq_handler(dev_priv, pipe);
@@ -4162,37 +4123,6 @@ static int i915_irq_postinstall(struct drm_device *dev)
 	return 0;
 }
 
-/*
- * Returns true when a page flip has completed.
- */
-static bool i915_handle_vblank(struct drm_i915_private *dev_priv,
-			       int plane, int pipe, u32 iir)
-{
-	u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
-
-	if (!intel_pipe_handle_vblank(dev_priv, pipe))
-		return false;
-
-	if ((iir & flip_pending) == 0)
-		goto check_page_flip;
-
-	/* We detect FlipDone by looking for the change in PendingFlip from '1'
-	 * to '0' on the following vblank, i.e. IIR has the Pendingflip
-	 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
-	 * the flip is completed (no longer pending). Since this doesn't raise
-	 * an interrupt per se, we watch for the change at vblank.
-	 */
-	if (I915_READ(ISR) & flip_pending)
-		goto check_page_flip;
-
-	intel_finish_page_flip_cs(dev_priv, pipe);
-	return true;
-
-check_page_flip:
-	intel_check_page_flip(dev_priv, pipe);
-	return false;
-}
-
 static irqreturn_t i915_irq_handler(int irq, void *arg)
 {
 	struct drm_device *dev = arg;
@@ -4253,13 +4183,8 @@ static irqreturn_t i915_irq_handler(int irq, void *arg)
 			notify_ring(&dev_priv->engine[RCS]);
 
 		for_each_pipe(dev_priv, pipe) {
-			int plane = pipe;
-			if (HAS_FBC(dev_priv))
-				plane = !plane;
-
-			if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
-			    i915_handle_vblank(dev_priv, plane, pipe, iir))
-				flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
+			if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS)
+				intel_pipe_handle_vblank(dev_priv, pipe);
 
 			if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
 				blc_event = true;
@@ -4487,9 +4412,8 @@ static irqreturn_t i965_irq_handler(int irq, void *arg)
 			notify_ring(&dev_priv->engine[VCS]);
 
 		for_each_pipe(dev_priv, pipe) {
-			if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
-			    i915_handle_vblank(dev_priv, pipe, pipe, iir))
-				flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
+			if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
+				intel_pipe_handle_vblank(dev_priv, pipe);
 
 			if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
 				blc_event = true;