[Intel-gfx] [RFC 6/7] drm/i915: Enable and handle flip done interrupt

[Karthik B S]

Enable flip done function is called before writing the
surface address register as the write to this register triggers
the flip done interrupt.

If the flip done event is requested then send it in the flip done handler,
and then disable the interrupt.

Signed-off-by: Karthik B S <karthik.b.s at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 7 +++++++
 drivers/gpu/drm/i915/i915_irq.c              | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index a8de08c3773e..757380af1f93 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -15604,6 +15604,13 @@ static void intel_atomic_commit_tail(struct intel_atomic_state *state)
 	if (state->modeset)
 		icl_dbuf_slice_pre_update(state);
 
+	for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
+		if (new_crtc_state->uapi.async_flip) {
+			icl_enable_flip_done(&crtc->base);
+			break;
+		}
+	}
+
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
 	dev_priv->display.commit_modeset_enables(state);
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 1feda9aecf4a..c9b1bb0e2c30 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2363,6 +2363,9 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
 		if (iir & GEN8_PIPE_VBLANK)
 			intel_handle_vblank(dev_priv, pipe);
 
+		if (iir & GEN9_PIPE_PLANE1_FLIP_DONE)
+			flip_done_handler(dev_priv, pipe);
+
 		if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
 			hsw_pipe_crc_irq_handler(dev_priv, pipe);
 
-- 
2.22.0