Use atomic enable/disable for bridge callbacks to access certain states like self-refresh.
This change avoids panel prepare/unprepare based on self-refresh state.
Signed-off-by: Sankeerth Billakanti quic_sbillaka@quicinc.com Signed-off-by: Kalyan Thota quic_kalyant@quicinc.com Signed-off-by: Vinod Polimera quic_vpolimer@quicinc.com
Changes in V2: - As per review suggestion by Dmitry. --- drivers/gpu/drm/bridge/panel.c | 102 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 94 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index b32295a..5c7dc82 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -41,6 +41,40 @@ static int panel_bridge_connector_get_modes(struct drm_connector *connector) return drm_panel_get_modes(panel_bridge->panel, connector); }
+static struct drm_crtc *bridge_drm_get_old_connector_crtc(struct drm_encoder *encoder, + struct drm_atomic_state *state) +{ + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_old_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_old_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} + +static struct drm_crtc *bridge_drm_get_new_connector_crtc(struct drm_encoder *encoder, + struct drm_atomic_state *state) +{ + struct drm_connector *connector; + struct drm_connector_state *conn_state; + + connector = drm_atomic_get_new_connector_for_encoder(state, encoder); + if (!connector) + return NULL; + + conn_state = drm_atomic_get_new_connector_state(state, connector); + if (!conn_state) + return NULL; + + return conn_state->crtc; +} + static const struct drm_connector_helper_funcs panel_bridge_connector_helper_funcs = { .get_modes = panel_bridge_connector_get_modes, @@ -102,30 +136,82 @@ static void panel_bridge_detach(struct drm_bridge *bridge) drm_connector_cleanup(connector); }
-static void panel_bridge_pre_enable(struct drm_bridge *bridge) +static void panel_bridge_pre_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_encoder *encoder = bridge->encoder; + struct drm_crtc *crtc; + struct drm_crtc_state *old_crtc_state; + + crtc = bridge_drm_get_new_connector_crtc(encoder, old_state); + if (!crtc) + return; + + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); + if (old_crtc_state && old_crtc_state->self_refresh_active) + return;
drm_panel_prepare(panel_bridge->panel); }
-static void panel_bridge_enable(struct drm_bridge *bridge) +static void panel_bridge_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_encoder *encoder = bridge->encoder; + struct drm_crtc *crtc; + struct drm_crtc_state *old_crtc_state; + + crtc = bridge_drm_get_new_connector_crtc(encoder, old_state); + if (!crtc) + return; + + old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc); + if (old_crtc_state && old_crtc_state->self_refresh_active) + return;
drm_panel_enable(panel_bridge->panel); }
-static void panel_bridge_disable(struct drm_bridge *bridge) +static void panel_bridge_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_encoder *encoder = bridge->encoder; + struct drm_crtc *crtc; + struct drm_crtc_state *new_crtc_state; + + crtc = bridge_drm_get_old_connector_crtc(encoder, old_state); + if (!crtc) + return; + + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); + if (new_crtc_state && new_crtc_state->self_refresh_active) + return;
drm_panel_disable(panel_bridge->panel); }
-static void panel_bridge_post_disable(struct drm_bridge *bridge) +static void panel_bridge_post_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_atomic_state *old_state = old_bridge_state->base.state; + struct drm_encoder *encoder = bridge->encoder; + struct drm_crtc *crtc; + struct drm_crtc_state *new_crtc_state; + + crtc = bridge_drm_get_old_connector_crtc(encoder, old_state); + if (!crtc) + return; + + new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc); + if (new_crtc_state && new_crtc_state->self_refresh_active) + return;
drm_panel_unprepare(panel_bridge->panel); } @@ -141,10 +227,10 @@ static int panel_bridge_get_modes(struct drm_bridge *bridge, static const struct drm_bridge_funcs panel_bridge_bridge_funcs = { .attach = panel_bridge_attach, .detach = panel_bridge_detach, - .pre_enable = panel_bridge_pre_enable, - .enable = panel_bridge_enable, - .disable = panel_bridge_disable, - .post_disable = panel_bridge_post_disable, + .atomic_pre_enable = panel_bridge_pre_enable, + .atomic_enable = panel_bridge_enable, + .atomic_disable = panel_bridge_disable, + .atomic_post_disable = panel_bridge_post_disable, .get_modes = panel_bridge_get_modes, .atomic_reset = drm_atomic_helper_bridge_reset, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,