On 11/11/2022 16:56, Kalyan Thota wrote:
Pin each crtc with one encoder. This arrangement will
disallow crtc switching between encoders and also will
facilitate to advertise certain features on crtc based
on encoder type.
Changes in v1:
- use drm_for_each_encoder macro while iterating through
encoder list (Dmitry)
BTW: if these patches form a series, please send them so.
Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 7a5fabc..0d94eec0d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -798,19 +798,20 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
max_crtc_count = min(max_crtc_count, primary_planes_idx);
/* Create one CRTC per encoder */
- for (i = 0; i < max_crtc_count; i++) {
- crtc = dpu_crtc_init(dev, primary_planes[i], cursor_planes[i]);
- if (IS_ERR(crtc)) {
- ret = PTR_ERR(crtc);
- return ret;
+ i = 0;
+ drm_for_each_encoder(encoder, dev) {
+ if (i < max_crtc_count) {
What if max_crtc_counter < num_encoders? I think we should disallow such
configuration. Can it happen on any of relevant platforms?
+ crtc = dpu_crtc_init(dev, primary_planes[i], cursor_planes[i]);
+ if (IS_ERR(crtc)) {
+ ret = PTR_ERR(crtc);
+ return ret;
+ }
+ priv->crtcs[priv->num_crtcs++] = crtc;
+ encoder->possible_crtcs = 1 << drm_crtc_index(crtc);
}
- priv->crtcs[priv->num_crtcs++] = crtc;
+ i++;
}
- /* All CRTCs are compatible with all encoders */
- drm_for_each_encoder(encoder, dev)
- encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
-
return 0;
}
--
With best wishes
Dmitry
