[PATCH v2 22/22] drm/msm/dpu: Set possible clones for all encoders

[Jessica Zhang]

Set writeback encoders as possible clones for non-writeback encoders and
vice versa.

Signed-off-by: Jessica Zhang <quic_jessz...@quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 32 +++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c     |  7 +++++--
 3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 87eaaf1196c2..39dabb9eb39a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2409,6 +2409,38 @@ static int dpu_encoder_virt_add_phys_encs(
        return 0;
 }
 
+/**
+ * dpu_encoder_get_clones - Calculate the possible_clones for DPU encoder
+ * @drm_enc:        DRM encoder pointer
+ * Returns:         possible_clones mask
+ */
+uint32_t dpu_encoder_get_clones(struct drm_encoder *drm_enc)
+{
+       struct drm_encoder *curr;
+       int type = drm_enc->encoder_type;
+       uint32_t clone_mask = drm_encoder_mask(drm_enc);
+
+       /*
+        * Set writeback as possible clones of real-time encoders and real-time
+        * encoders as clones of writeback.
+        *
+        * Writeback encoders can't be clones of each other and real-time
+        * encoders can't be clones of each other.
+        */
+       drm_for_each_encoder(curr, drm_enc->dev) {
+               if (type == DRM_MODE_ENCODER_VIRTUAL &&
+                   curr->encoder_type == DRM_MODE_ENCODER_VIRTUAL)
+                       continue;
+               if (type != DRM_MODE_ENCODER_VIRTUAL &&
+                   curr->encoder_type != DRM_MODE_ENCODER_VIRTUAL)
+                       continue;
+
+               clone_mask |= drm_encoder_mask(curr);
+       }
+
+       return clone_mask;
+}
+
 static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
                                 struct dpu_kms *dpu_kms,
                                 struct msm_display_info *disp_info)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index deaa0463b289..1692e7de079d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -98,6 +98,8 @@ enum dpu_intf_mode dpu_encoder_get_intf_mode(struct 
drm_encoder *encoder);
  */
 void dpu_encoder_virt_runtime_resume(struct drm_encoder *encoder);
 
+uint32_t dpu_encoder_get_clones(struct drm_encoder *drm_enc);
+
 /**
  * dpu_encoder_init - initialize virtual encoder object
  * @dev:        Pointer to drm device structure
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 47e304b357e8..5effa108f328 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2013 Red Hat
  * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights 
reserved.
  *
  * Author: Rob Clark <robdcl...@gmail.com>
  */
@@ -793,8 +793,11 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
                return ret;
 
        num_encoders = 0;
-       drm_for_each_encoder(encoder, dev)
+       drm_for_each_encoder(encoder, dev) {
                num_encoders++;
+               if (catalog->cwb_count > 0)
+                       encoder->possible_clones = 
dpu_encoder_get_clones(encoder);
+       }
 
        max_crtc_count = min(catalog->mixer_count, num_encoders);
 

-- 
2.34.1