[v5,08/13] drm/msm/dpu: don't use merge_3d if DSC merge topology is used

Commit Message

Vinod Koul March 25, 2022, 11:05 a.m. UTC

From: Dmitry Baryshkov <[e-mail]>

DPU supports different topologies for the case when multiple INTFs are
being driven by the single phys_enc. The driver defaults to using 3DMux
in such cases. Don't use it if DSC merge is used instead.

Suggested-by: Abhinav Kumar <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c      | 16 ++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h      |  6 ++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h |  4 +++-
 3 files changed, 25 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 2219dbfa5ee7..a672c91dbb8b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -534,6 +534,22 @@  void dpu_encoder_helper_split_config(
 	}
 }
 
+bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
+{
+	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
+	int i, intf_count = 0, num_dsc = 0;
+
+	for (i = 0; i < MAX_PHYS_ENCODERS_PER_VIRTUAL; i++)
+		if (dpu_enc->phys_encs[i])
+			intf_count++;
+
+	/* See dpu_encoder_get_topology, we only support 2:2:1 topology */
+	if (dpu_enc->dsc)
+		num_dsc = 2;
+
+	return (num_dsc > 0) && (num_dsc > intf_count);
+}
+
 static struct msm_display_topology dpu_encoder_get_topology(
 			struct dpu_encoder_virt *dpu_enc,
 			struct dpu_kms *dpu_kms,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index e241914a9677..76fd48c0b17c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -168,4 +168,10 @@  int dpu_encoder_get_linecount(struct drm_encoder *drm_enc);
  */
 int dpu_encoder_get_vsync_count(struct drm_encoder *drm_enc);
 
+/**
+ * dpu_encoder_use_dsc_merge - returns true if the encoder uses DSC merge topology.
+ * @drm_enc:    Pointer to previously created drm encoder structure
+ */
+bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc);
+
 #endif /* __DPU_ENCODER_H__ */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 7b90d644a41b..a19140590eaa 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -325,8 +325,10 @@  static inline enum dpu_3d_blend_mode dpu_encoder_helper_get_3d_blend_mode(
 
 	dpu_cstate = to_dpu_crtc_state(phys_enc->parent->crtc->state);
 
+	/* Use merge_3d unless DSC MERGE topology is used */
 	if (phys_enc->split_role == ENC_ROLE_SOLO &&
-	    dpu_cstate->num_mixers == CRTC_DUAL_MIXERS)
+	    dpu_cstate->num_mixers == CRTC_DUAL_MIXERS &&
+	    !dpu_encoder_use_dsc_merge(phys_enc->parent))
 		return BLEND_3D_H_ROW_INT;
 
 	return BLEND_3D_NONE;