[Intel-gfx] [PATCH 8/9] drm/i915: Deal with bigjoiner vs. DRRS

[Ville Syrjala]

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

DRRS operates on transcoder level, so we should only poke at it from
the master crtc rather than letting every joined pipe give it
potentially conflicting input.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_drrs.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_drrs.c b/drivers/gpu/drm/i915/display/intel_drrs.c
index 44c9af8f8b9b..9a341ab1a848 100644
--- a/drivers/gpu/drm/i915/display/intel_drrs.c
+++ b/drivers/gpu/drm/i915/display/intel_drrs.c
@@ -176,8 +176,16 @@ static void intel_drrs_schedule_work(struct intel_crtc *crtc)
 static unsigned int intel_drrs_frontbuffer_bits(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	unsigned int frontbuffer_bits;
 
-	return INTEL_FRONTBUFFER_ALL_MASK(crtc->pipe);
+	frontbuffer_bits = INTEL_FRONTBUFFER_ALL_MASK(crtc->pipe);
+
+	for_each_intel_crtc_in_pipe_mask(&i915->drm, crtc,
+					 crtc_state->bigjoiner_pipes)
+		frontbuffer_bits |= INTEL_FRONTBUFFER_ALL_MASK(crtc->pipe);
+
+	return frontbuffer_bits;
 }
 
 /**
@@ -196,6 +204,9 @@ void intel_drrs_enable(const struct intel_crtc_state *crtc_state)
 	if (!crtc_state->hw.active)
 		return;
 
+	if (intel_crtc_is_bigjoiner_slave(crtc_state))
+		return;
+
 	mutex_lock(&crtc->drrs.mutex);
 
 	crtc->drrs.cpu_transcoder = crtc_state->cpu_transcoder;
@@ -223,6 +234,9 @@ void intel_drrs_disable(const struct intel_crtc_state *old_crtc_state)
 	if (!old_crtc_state->hw.active)
 		return;
 
+	if (intel_crtc_is_bigjoiner_slave(old_crtc_state))
+		return;
+
 	mutex_lock(&crtc->drrs.mutex);
 
 	if (intel_drrs_is_enabled(crtc))
-- 
2.34.1