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path: root/drivers/gpu/drm/rockchip/rockchip_rgb.c
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Diffstat (limited to 'drivers/gpu/drm/rockchip/rockchip_rgb.c')
-rw-r--r--drivers/gpu/drm/rockchip/rockchip_rgb.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.c b/drivers/gpu/drm/rockchip/rockchip_rgb.c
new file mode 100644
index 000000000..75eb7cca3
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c
@@ -0,0 +1,187 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ * Sandy Huang <hjc@rock-chips.com>
+ */
+
+#include <linux/component.h>
+#include <linux/media-bus-format.h>
+#include <linux/of_graph.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_vop.h"
+#include "rockchip_rgb.h"
+
+#define encoder_to_rgb(c) container_of(c, struct rockchip_rgb, encoder)
+
+struct rockchip_rgb {
+ struct device *dev;
+ struct drm_device *drm_dev;
+ struct drm_bridge *bridge;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+ int output_mode;
+};
+
+static int
+rockchip_rgb_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
+ struct drm_connector *connector = conn_state->connector;
+ struct drm_display_info *info = &connector->display_info;
+ u32 bus_format;
+
+ if (info->num_bus_formats)
+ bus_format = info->bus_formats[0];
+ else
+ bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ s->output_mode = ROCKCHIP_OUT_MODE_P666;
+ break;
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ s->output_mode = ROCKCHIP_OUT_MODE_P565;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ default:
+ s->output_mode = ROCKCHIP_OUT_MODE_P888;
+ break;
+ }
+
+ s->output_type = DRM_MODE_CONNECTOR_LVDS;
+
+ return 0;
+}
+
+static const
+struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
+ .atomic_check = rockchip_rgb_encoder_atomic_check,
+};
+
+struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
+ struct drm_crtc *crtc,
+ struct drm_device *drm_dev)
+{
+ struct rockchip_rgb *rgb;
+ struct drm_encoder *encoder;
+ struct device_node *port, *endpoint;
+ u32 endpoint_id;
+ int ret = 0, child_count = 0;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ struct drm_connector *connector;
+
+ rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
+ if (!rgb)
+ return ERR_PTR(-ENOMEM);
+
+ rgb->dev = dev;
+ rgb->drm_dev = drm_dev;
+
+ port = of_graph_get_port_by_id(dev->of_node, 0);
+ if (!port)
+ return ERR_PTR(-EINVAL);
+
+ for_each_child_of_node(port, endpoint) {
+ if (of_property_read_u32(endpoint, "reg", &endpoint_id))
+ endpoint_id = 0;
+
+ /* if subdriver (> 0) or error case (< 0), ignore entry */
+ if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
+ continue;
+
+ child_count++;
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
+ &panel, &bridge);
+ if (!ret) {
+ of_node_put(endpoint);
+ break;
+ }
+ }
+
+ of_node_put(port);
+
+ /* if the rgb output is not connected to anything, just return */
+ if (!child_count)
+ return NULL;
+
+ if (ret < 0) {
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ encoder = &rgb->encoder;
+ encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+ ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
+ if (ret < 0) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to initialize encoder: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
+
+ if (panel) {
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_LVDS);
+ if (IS_ERR(bridge))
+ return ERR_CAST(bridge);
+ }
+
+ rgb->bridge = bridge;
+
+ ret = drm_bridge_attach(encoder, rgb->bridge, NULL,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret)
+ goto err_free_encoder;
+
+ connector = &rgb->connector;
+ connector = drm_bridge_connector_init(rgb->drm_dev, encoder);
+ if (IS_ERR(connector)) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to initialize bridge connector: %pe\n",
+ connector);
+ ret = PTR_ERR(connector);
+ goto err_free_encoder;
+ }
+
+ ret = drm_connector_attach_encoder(connector, encoder);
+ if (ret < 0) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to attach encoder: %d\n", ret);
+ goto err_free_connector;
+ }
+
+ return rgb;
+
+err_free_connector:
+ drm_connector_cleanup(connector);
+err_free_encoder:
+ drm_encoder_cleanup(encoder);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(rockchip_rgb_init);
+
+void rockchip_rgb_fini(struct rockchip_rgb *rgb)
+{
+ drm_panel_bridge_remove(rgb->bridge);
+ drm_connector_cleanup(&rgb->connector);
+ drm_encoder_cleanup(&rgb->encoder);
+}
+EXPORT_SYMBOL_GPL(rockchip_rgb_fini);