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Subject[PATCH v9 06/15] drm/msm/dp: disable self_refresh_aware after entering psr
Date
From: Sankeerth Billakanti <quic_sbillaka@quicinc.com>

Updated frames get queued if self_refresh_aware is set when the
sink is in psr. To support bridge enable and avoid queuing of update
frames, reset the self_refresh_aware state after entering psr.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
Signed-off-by: Vinod Polimera <quic_vpolimer@quicinc.com>
---
drivers/gpu/drm/msm/dp/dp_drm.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index d3e9010..0f262a6 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -131,6 +131,8 @@ static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
struct drm_crtc_state *old_crtc_state;
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
struct msm_dp *dp = dp_bridge->dp_display;
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state = NULL;

/*
* Check the old state of the crtc to determine if the panel
@@ -147,10 +149,22 @@ static void edp_bridge_atomic_enable(struct drm_bridge *drm_bridge,

if (old_crtc_state && old_crtc_state->self_refresh_active) {
dp_display_set_psr(dp, false);
- return;
+ goto psr_aware;
}

dp_bridge_atomic_enable(drm_bridge, old_bridge_state);
+
+psr_aware:
+ connector = drm_atomic_get_new_connector_for_encoder(atomic_state,
+ drm_bridge->encoder);
+ if (connector)
+ conn_state = drm_atomic_get_new_connector_state(atomic_state,
+ connector);
+
+ if (conn_state) {
+ conn_state->self_refresh_aware = dp->psr_supported;
+ }
+
}

static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
@@ -161,6 +175,14 @@ static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
struct drm_crtc_state *new_crtc_state = NULL, *old_crtc_state = NULL;
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
struct msm_dp *dp = dp_bridge->dp_display;
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state = NULL;
+
+ connector = drm_atomic_get_old_connector_for_encoder(atomic_state,
+ drm_bridge->encoder);
+ if (connector)
+ conn_state = drm_atomic_get_new_connector_state(atomic_state,
+ connector);

crtc = drm_atomic_get_old_crtc_for_encoder(atomic_state,
drm_bridge->encoder);
@@ -187,6 +209,9 @@ static void edp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
* when display disable occurs while the sink is in psr state.
*/
if (new_crtc_state->self_refresh_active) {
+ if (conn_state)
+ conn_state->self_refresh_aware = false;
+
dp_display_set_psr(dp, true);
return;
} else if (old_crtc_state->self_refresh_active) {
--
2.7.4
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