The current output code only supports connection to drm panels. First simplify the drm panel code, and then add support for external drm bridges.
Signed-off-by: Boris Brezillon boris.brezillon@free-electrons.com --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 2 +- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 193 +++++++++++++---------- 2 files changed, 113 insertions(+), 82 deletions(-)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 3f8bfa6..d004751 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -551,7 +551,7 @@ static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
ret = atmel_hlcdc_create_outputs(dev); if (ret) { - dev_err(dev->dev, "failed to create panel: %d\n", ret); + dev_err(dev->dev, "failed to create HLCDC outputs: %d\n", ret); return ret; }
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c index 75237b5..39802c0 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c @@ -34,11 +34,13 @@ * @connector: DRM connector * @encoder: DRM encoder * @dc: pointer to the atmel_hlcdc_dc structure + * @panel: panel connected on the RGB output */ struct atmel_hlcdc_rgb_output { struct drm_connector connector; struct drm_encoder encoder; struct atmel_hlcdc_dc *dc; + struct drm_panel *panel; };
static inline struct atmel_hlcdc_rgb_output * @@ -54,46 +56,31 @@ drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder) return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder); }
-/** - * Atmel HLCDC Panel device structure - * - * This structure is specialization of the slave device structure to - * interface with drm panels. - * - * @base: base slave device fields - * @panel: drm panel attached to this slave device - */ -struct atmel_hlcdc_panel { - struct atmel_hlcdc_rgb_output base; - struct drm_panel *panel; -}; - -static inline struct atmel_hlcdc_panel * -atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output) -{ - return container_of(output, struct atmel_hlcdc_panel, base); -} - -static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder) +static void atmel_hlcdc_rgb_encoder_enable(struct drm_encoder *encoder) { struct atmel_hlcdc_rgb_output *rgb = drm_encoder_to_atmel_hlcdc_rgb_output(encoder); - struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb); - drm_panel_enable(panel->panel); + + if (rgb->panel) { + drm_panel_prepare(rgb->panel); + drm_panel_enable(rgb->panel); + } }
-static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder) +static void atmel_hlcdc_rgb_encoder_disable(struct drm_encoder *encoder) { struct atmel_hlcdc_rgb_output *rgb = drm_encoder_to_atmel_hlcdc_rgb_output(encoder); - struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
- drm_panel_disable(panel->panel); + if (rgb->panel) { + drm_panel_disable(rgb->panel); + drm_panel_unprepare(rgb->panel); + } }
static const struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = { - .disable = atmel_hlcdc_panel_encoder_disable, - .enable = atmel_hlcdc_panel_encoder_enable, + .disable = atmel_hlcdc_rgb_encoder_disable, + .enable = atmel_hlcdc_rgb_encoder_enable, };
static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder) @@ -110,9 +97,11 @@ static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); - struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
- return panel->panel->funcs->get_modes(panel->panel); + if (rgb->panel) + return rgb->panel->funcs->get_modes(rgb->panel); + + return 0; }
static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector, @@ -144,7 +133,13 @@ static const struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helpe static enum drm_connector_status atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force) { - return connector_status_connected; + struct atmel_hlcdc_rgb_output *rgb = + drm_connector_to_atmel_hlcdc_rgb_output(connector); + + if (rgb->panel) + return connector_status_connected; + + return connector_status_disconnected; }
static void @@ -152,9 +147,10 @@ atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector) { struct atmel_hlcdc_rgb_output *rgb = drm_connector_to_atmel_hlcdc_rgb_output(connector); - struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
- drm_panel_detach(panel->panel); + if (rgb->panel) + drm_panel_detach(rgb->panel); + drm_connector_cleanup(connector); }
@@ -168,87 +164,122 @@ static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = { .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, };
-static int atmel_hlcdc_create_panel_output(struct drm_device *dev, - struct of_endpoint *ep) +static int atmel_hlcdc_check_endpoint(struct drm_device *dev, + const struct of_endpoint *ep) { - struct atmel_hlcdc_dc *dc = dev->dev_private; struct device_node *np; - struct drm_panel *p = NULL; - struct atmel_hlcdc_panel *panel; - int ret; + void *obj;
np = of_graph_get_remote_port_parent(ep->local_node); - if (!np) - return -EINVAL;
- p = of_drm_find_panel(np); + obj = of_drm_find_panel(np); + if (!obj) + obj = of_drm_find_bridge(np); + of_node_put(np);
- if (!p) - return -EPROBE_DEFER; + return obj ? 0 : -EPROBE_DEFER; +}
- panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL); - if (!panel) - return -EINVAL; +static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, + const struct of_endpoint *ep) +{ + struct atmel_hlcdc_dc *dc = dev->dev_private; + struct atmel_hlcdc_rgb_output *output; + struct device_node *np; + struct drm_panel *panel; + struct drm_bridge *bridge; + int ret;
+ output = devm_kzalloc(dev->dev, sizeof(*output), GFP_KERNEL); + if (!output) + return -EINVAL;
- panel->base.dc = dc; + output->dc = dc;
- drm_encoder_helper_add(&panel->base.encoder, + drm_encoder_helper_add(&output->encoder, &atmel_hlcdc_panel_encoder_helper_funcs); - ret = drm_encoder_init(dev, &panel->base.encoder, + ret = drm_encoder_init(dev, &output->encoder, &atmel_hlcdc_panel_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL); if (ret) return ret;
- panel->base.connector.dpms = DRM_MODE_DPMS_OFF; - panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT; - drm_connector_helper_add(&panel->base.connector, - &atmel_hlcdc_panel_connector_helper_funcs); - ret = drm_connector_init(dev, &panel->base.connector, - &atmel_hlcdc_panel_connector_funcs, - DRM_MODE_CONNECTOR_Unknown); - if (ret) - goto err_encoder_cleanup; + output->encoder.possible_crtcs = 0x1; + + np = of_graph_get_remote_port_parent(ep->local_node);
- drm_mode_connector_attach_encoder(&panel->base.connector, - &panel->base.encoder); - panel->base.encoder.possible_crtcs = 0x1; + ret = -EPROBE_DEFER;
- drm_panel_attach(p, &panel->base.connector); - panel->panel = p; + panel = of_drm_find_panel(np); + if (panel) { + of_node_put(np); + output->connector.dpms = DRM_MODE_DPMS_OFF; + output->connector.polled = DRM_CONNECTOR_POLL_CONNECT; + drm_connector_helper_add(&output->connector, + &atmel_hlcdc_panel_connector_helper_funcs); + ret = drm_connector_init(dev, &output->connector, + &atmel_hlcdc_panel_connector_funcs, + DRM_MODE_CONNECTOR_Unknown); + if (ret) + goto err_encoder_cleanup;
- return 0; + drm_mode_connector_attach_encoder(&output->connector, + &output->encoder); + + ret = drm_panel_attach(panel, &output->connector); + if (ret) { + drm_connector_cleanup(&output->connector); + goto err_encoder_cleanup; + } + + output->panel = panel; + + return 0; + } + + bridge = of_drm_find_bridge(np); + of_node_put(np); + + if (bridge) { + output->encoder.bridge = bridge; + bridge->encoder = &output->encoder; + ret = drm_bridge_attach(dev, bridge); + if (!ret) + return 0; + }
err_encoder_cleanup: - drm_encoder_cleanup(&panel->base.encoder); + drm_encoder_cleanup(&output->encoder);
return ret; }
int atmel_hlcdc_create_outputs(struct drm_device *dev) { - struct device_node *port_np, *np; + struct device_node *ep_np = NULL; struct of_endpoint ep; int ret;
- port_np = of_get_child_by_name(dev->dev->of_node, "port"); - if (!port_np) - return -EINVAL; + for_each_endpoint_of_node(dev->dev->of_node, ep_np) { + ret = of_graph_parse_endpoint(ep_np, &ep); + if (!ret) + ret = atmel_hlcdc_check_endpoint(dev, &ep);
- np = of_get_child_by_name(port_np, "endpoint"); - of_node_put(port_np); + of_node_put(ep_np); + if (ret) + return ret; + }
- if (!np) - return -EINVAL; + for_each_endpoint_of_node(dev->dev->of_node, ep_np) { + ret = of_graph_parse_endpoint(ep_np, &ep); + if (!ret) + ret = atmel_hlcdc_attach_endpoint(dev, &ep);
- ret = of_graph_parse_endpoint(np, &ep); - of_node_put(port_np); + of_node_put(ep_np); + if (ret) + return ret; + }
- if (ret) - return ret; - - /* We currently only support panel output */ - return atmel_hlcdc_create_panel_output(dev, &ep); + return 0; }