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disp: msm: sde: skip RM reserve for primary in cwb on/off usecase

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Add changes to skip RM allocation during atomic_check for dsi connectors
which can have a seamless transition during CWB usecase. When CWB gets
enabled in alternate commits N, N+2 on dsi connectors there is back to
back connectors_changed modeset and poll gets enabled for the consecutive
commit N+1, N+3 on rsvp_nxt to get cleared. This rsvp_nxt will be cleared
on drm_atomic_state_put of commit N, N+2, hence atomic_check of commit N+1,
N+3 is blocked until this time causing commit failures.

Change-Id: I06f7a8d9dadb42b6d69201afeff099d554edd98e
Signed-off-by: Jayaprakash Madisetty <jmadiset@codeaurora.org>
This commit is contained in:
Jayaprakash Madisetty 2021-07-20 19:26:45 +05:30
commit ee9b8ca504
1 changed files with 7 additions and 0 deletions
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7
msm/sde/sde_encoder.c
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@ -917,6 +917,12 @@ static int _sde_encoder_atomic_check_reserve(struct drm_encoder *drm_enc,
return ret;
}
/* Skip RM allocation for Primary during CWB usecase */
if (!crtc_state->mode_changed && !crtc_state->active_changed &&
crtc_state->connectors_changed && (conn_state->crtc ==
conn_state->connector->state->crtc))
goto skip_reserve;
/* Reserve dynamic resources, indicating atomic_check phase */
ret = sde_rm_reserve(&sde_kms->rm, drm_enc, crtc_state,
conn_state, true);
@ -927,6 +933,7 @@ static int _sde_encoder_atomic_check_reserve(struct drm_encoder *drm_enc,
return ret;
}
skip_reserve:
/**
* Update connector state with the topology selected for the
* resource set validated. Reset the topology if we are