1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_sil164.c b/drivers/gpu/drm/ast/ast_sil164.c
new file mode 100644
index 000000000000..496c7120e515
--- /dev/null
+++ b/drivers/gpu/drm/ast/ast_sil164.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: MIT
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "ast_ddc.h"
+#include "ast_drv.h"
+
+/*
+ * Encoder
+ */
+
+static const struct drm_encoder_funcs ast_sil164_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+/*
+ * Connector
+ */
+
+static int ast_sil164_connector_helper_get_modes(struct drm_connector *connector)
+{
+	struct ast_connector *ast_connector = to_ast_connector(connector);
+	int count;
+
+	if (ast_connector->physical_status == connector_status_connected) {
+		count = drm_connector_helper_get_modes(connector);
+	} else {
+		/*
+		 * There's no EDID data without a connected monitor. Set BMC-
+		 * compatible modes in this case. The XGA default resolution
+		 * should work well for all BMCs.
+		 */
+		count = drm_add_modes_noedid(connector, 4096, 4096);
+		if (count)
+			drm_set_preferred_mode(connector, 1024, 768);
+	}
+
+	return count;
+}
+
+static int ast_sil164_connector_helper_detect_ctx(struct drm_connector *connector,
+						  struct drm_modeset_acquire_ctx *ctx,
+						  bool force)
+{
+	struct ast_connector *ast_connector = to_ast_connector(connector);
+	enum drm_connector_status status;
+
+	status = drm_connector_helper_detect_from_ddc(connector, ctx, force);
+
+	if (status != ast_connector->physical_status)
+		++connector->epoch_counter;
+	ast_connector->physical_status = status;
+
+	return connector_status_connected;
+}
+
+static const struct drm_connector_helper_funcs ast_sil164_connector_helper_funcs = {
+	.get_modes = ast_sil164_connector_helper_get_modes,
+	.detect_ctx = ast_sil164_connector_helper_detect_ctx,
+};
+
+static const struct drm_connector_funcs ast_sil164_connector_funcs = {
+	.reset = drm_atomic_helper_connector_reset,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = drm_connector_cleanup,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int ast_sil164_connector_init(struct drm_device *dev, struct drm_connector *connector)
+{
+	struct ast_device *ast = to_ast_device(dev);
+	struct i2c_adapter *ddc;
+	int ret;
+
+	ddc = ast_ddc_create(ast);
+	if (IS_ERR(ddc)) {
+		ret = PTR_ERR(ddc);
+		drm_err(dev, "failed to add DDC bus for connector; ret=%d\n", ret);
+		return ret;
+	}
+
+	ret = drm_connector_init_with_ddc(dev, connector, &ast_sil164_connector_funcs,
+					  DRM_MODE_CONNECTOR_DVII, ddc);
+	if (ret)
+		return ret;
+
+	drm_connector_helper_add(connector, &ast_sil164_connector_helper_funcs);
+
+	connector->interlace_allowed = 0;
+	connector->doublescan_allowed = 0;
+
+	connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
+
+	return 0;
+}
+
+int ast_sil164_output_init(struct ast_device *ast)
+{
+	struct drm_device *dev = &ast->base;
+	struct drm_crtc *crtc = &ast->crtc;
+	struct drm_encoder *encoder = &ast->output.sil164.encoder;
+	struct ast_connector *ast_connector = &ast->output.sil164.connector;
+	struct drm_connector *connector = &ast_connector->base;
+	int ret;
+
+	ret = drm_encoder_init(dev, encoder, &ast_sil164_encoder_funcs,
+			       DRM_MODE_ENCODER_TMDS, NULL);
+	if (ret)
+		return ret;
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+	ret = ast_sil164_connector_init(dev, connector);
+	if (ret)
+		return ret;
+	ast_connector->physical_status = connector->status;
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret)
+		return ret;
+
+	return 0;
+}