drm/bridge: anx7625: Add bridge helper atomic conversion

Add bridge helper atomic conversion.
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Xin Ji <xji@analogixsemi.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220106100127.1862702-1-xji@analogixsemi.com

drivers/gpu/drm/bridge/analogix/anx7625.c

@@ -1911,25 +1911,54 @@ static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
 	return true;
 }
 
-static void anx7625_bridge_enable(struct drm_bridge *bridge)
+static int anx7625_bridge_atomic_check(struct drm_bridge *bridge,
+				       struct drm_bridge_state *bridge_state,
+				       struct drm_crtc_state *crtc_state,
+				       struct drm_connector_state *conn_state)
 {
 	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
 	struct device *dev = &ctx->client->dev;
 
-	DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
+	dev_dbg(dev, "drm bridge atomic check\n");
+	return anx7625_bridge_mode_fixup(bridge, &crtc_state->mode,
+					 &crtc_state->adjusted_mode);
+}
+
+static void anx7625_bridge_atomic_enable(struct drm_bridge *bridge,
+					 struct drm_bridge_state *state)
+{
+	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+	struct device *dev = &ctx->client->dev;
+	struct drm_connector *connector;
+
+	dev_dbg(dev, "drm atomic enable\n");
+
+	if (!bridge->encoder) {
+		dev_err(dev, "Parent encoder object not found");
+		return;
+	}
+
+	connector = drm_atomic_get_new_connector_for_encoder(state->base.state,
+							     bridge->encoder);
+	if (!connector)
+		return;
+
+	ctx->connector = connector;
 
 	pm_runtime_get_sync(dev);
 
 	anx7625_dp_start(ctx);
 }
 
-static void anx7625_bridge_disable(struct drm_bridge *bridge)
+static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge,
+					  struct drm_bridge_state *old)
 {
 	struct anx7625_data *ctx = bridge_to_anx7625(bridge);
 	struct device *dev = &ctx->client->dev;
 
-	DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
+	dev_dbg(dev, "drm atomic disable\n");
 
+	ctx->connector = NULL;
 	anx7625_dp_stop(ctx);
 
 	pm_runtime_put_sync(dev);
@@ -1959,11 +1988,14 @@ static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge,
 
 static const struct drm_bridge_funcs anx7625_bridge_funcs = {
 	.attach = anx7625_bridge_attach,
-	.disable = anx7625_bridge_disable,
 	.mode_valid = anx7625_bridge_mode_valid,
 	.mode_set = anx7625_bridge_mode_set,
-	.mode_fixup = anx7625_bridge_mode_fixup,
-	.enable = anx7625_bridge_enable,
+	.atomic_check = anx7625_bridge_atomic_check,
+	.atomic_enable = anx7625_bridge_atomic_enable,
+	.atomic_disable = anx7625_bridge_atomic_disable,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
 	.detect = anx7625_bridge_detect,
 	.get_edid = anx7625_bridge_get_edid,
 };

drivers/gpu/drm/bridge/analogix/anx7625.h

@@ -407,6 +407,7 @@ struct anx7625_data {
 	u8 display_timing_valid;
 	struct drm_bridge bridge;
 	u8 bridge_attached;
+	struct drm_connector *connector;
 	struct mipi_dsi_device *dsi;
 };