drivers/gpu/drm/rockchip/dw_dp-rockchip.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/rockchip/dw_dp-rockchip.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/rockchip/dw_dp-rockchip.c
Extension
.c
Size
4360 bytes
Lines
161
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct rockchip_dw_dp {
	struct dw_dp *base;
	struct device *dev;
	struct rockchip_encoder encoder;
};

static int dw_dp_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_atomic_commit *state = conn_state->state;
	struct drm_display_info *di = &conn_state->connector->display_info;
	struct drm_bridge *bridge  = drm_bridge_chain_get_first_bridge(encoder);
	struct drm_bridge_state *bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
	u32 bus_format = bridge_state->input_bus_cfg.format;

	switch (bus_format) {
	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
		s->output_mode = ROCKCHIP_OUT_MODE_YUV420;
		break;
	case MEDIA_BUS_FMT_YUYV10_1X20:
	case MEDIA_BUS_FMT_YUYV8_1X16:
		s->output_mode = ROCKCHIP_OUT_MODE_S888_DUMMY;
		break;
	case MEDIA_BUS_FMT_RGB101010_1X30:
	case MEDIA_BUS_FMT_RGB888_1X24:
	case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
	case MEDIA_BUS_FMT_YUV10_1X30:
	case MEDIA_BUS_FMT_YUV8_1X24:
	default:
		s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
		break;
	}

	s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
	s->bus_format = bus_format;
	s->bus_flags = di->bus_flags;
	s->color_space = V4L2_COLORSPACE_DEFAULT;

	return 0;
}

static const struct drm_encoder_helper_funcs dw_dp_encoder_helper_funcs = {
	.atomic_check		= dw_dp_encoder_atomic_check,
};

static int dw_dp_rockchip_bind(struct device *dev, struct device *master, void *data)
{
	struct platform_device *pdev = to_platform_device(dev);
	const struct dw_dp_plat_data *plat_data;
	struct drm_device *drm_dev = data;
	struct rockchip_dw_dp *dp;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	int ret;

	dp = drmm_kzalloc(drm_dev, sizeof(*dp), GFP_KERNEL);
	if (!dp)
		return -ENOMEM;

	dp->dev = dev;
	platform_set_drvdata(pdev, dp);

	plat_data = of_device_get_match_data(dev);
	if (!plat_data)
		return -ENODEV;

	encoder = &dp->encoder.encoder;
	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, dev->of_node);
	rockchip_drm_encoder_set_crtc_endpoint_id(&dp->encoder, dev->of_node, 0, 0);

	ret = drmm_encoder_init(drm_dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL);
	if (ret)
		return ret;
	drm_encoder_helper_add(encoder, &dw_dp_encoder_helper_funcs);

	dp->base = dw_dp_bind(dev, encoder, plat_data);
	if (IS_ERR(dp->base))
		return PTR_ERR(dp->base);

	connector = drm_bridge_connector_init(drm_dev, encoder);
	if (IS_ERR(connector))
		return dev_err_probe(dev, PTR_ERR(connector),
				     "Failed to init bridge connector");

	return 0;
}

Annotation

Implementation Notes