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Date: Tue, 21 Jun 2022 16:23:18 +0530
From: Vinod Polimera <quic_vpolimer@...cinc.com>
To: y@...lcomm.com, dri-devel@...ts.freedesktop.org,
linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
devicetree@...r.kernel.org
Cc: Vinod Polimera <quic_vpolimer@...cinc.com>,
linux-kernel@...r.kernel.org, robdclark@...il.com,
dianders@...omium.org, swboyd@...omium.org,
quic_kalyant@...cinc.com, dmitry.baryshkov@...aro.org,
quic_sbillaka@...cinc.com
Subject: [v3 3/5] drm/bridge: add psr support during panel bridge enable & disable sequence
This change avoids panel prepare/unprepare based on self-refresh
state.
Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
Signed-off-by: Kalyan Thota <quic_kalyant@...cinc.com>
Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
---
drivers/gpu/drm/bridge/panel.c | 102 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 98 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index 59a3496..6b09ae0 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,
@@ -108,30 +142,90 @@ static void panel_bridge_detach(struct drm_bridge *bridge)
drm_connector_cleanup(connector);
}
-static void panel_bridge_atomic_pre_enable(struct drm_bridge *bridge)
+static void panel_bridge_atomic_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);
+
+ /* Don't touch the panel if we're coming back from self refresh state */
+ if (old_crtc_state && old_crtc_state->self_refresh_active)
+ return;
drm_panel_prepare(panel_bridge->panel);
}
-static void panel_bridge_atomic_enable(struct drm_bridge *bridge)
+static void panel_bridge_atomic_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);
+
+ /* Don't touch the panel if we're coming back from self refresh state */
+ if (old_crtc_state && old_crtc_state->self_refresh_active)
+ return;
drm_panel_enable(panel_bridge->panel);
}
-static void panel_bridge_atomic_disable(struct drm_bridge *bridge)
+static void panel_bridge_atomic_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);
+
+ /* Don't do a full disable on PSR transitions if new state is self refresh state */
+ if (new_crtc_state && new_crtc_state->self_refresh_active)
+ return;
drm_panel_disable(panel_bridge->panel);
}
-static void panel_bridge_atomic_post_disable(struct drm_bridge *bridge)
+static void panel_bridge_atomic_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);
+
+ /* Don't do unprepare on PSR transitions if new state is self refresh state */
+ if (new_crtc_state && new_crtc_state->self_refresh_active)
+ return;
drm_panel_unprepare(panel_bridge->panel);
}
--
2.7.4
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