[PATCH 7/8] drm: atmel-hlcdc: rework the output code to support drm bridges
Boris Brezillon
boris.brezillon at free-electrons.com
Wed Jan 6 02:19:28 PST 2016
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 at 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;
}
--
2.1.4
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