DRM bridge drivers have built-in handling of treating
all display pipeline components as bridges.
Convert exynos_drm_dsi to a bridge driver with built-in
encoder support for compatibility with existing component
drivers.
This keeps switching the driver into the bridge in a more
feasible manner.
Signed-off-by: Jagan Teki <ja...@amarulasolutions.com>
---
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 57 +++++++++++++++++--------
1 file changed, 39 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 1d777d8c1a83..90d2ce2c3055 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -257,6 +257,7 @@ struct exynos_dsi {
struct drm_connector connector;
struct drm_panel *panel;
struct list_head bridge_chain;
+ struct drm_bridge bridge;
struct drm_bridge *out_bridge;
struct device *dev;
@@ -287,9 +288,9 @@ struct exynos_dsi {
#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
#define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector)
-static inline struct exynos_dsi *encoder_to_dsi(struct drm_encoder *e)
+static inline struct exynos_dsi *bridge_to_dsi(struct drm_bridge *b)
{
- return container_of(e, struct exynos_dsi, encoder);
+ return container_of(b, struct exynos_dsi, bridge);
}
enum reg_idx {
@@ -1374,9 +1375,9 @@ static void exynos_dsi_unregister_te_irq(struct
exynos_dsi *dsi)
}
}
-static void exynos_dsi_enable(struct drm_encoder *encoder)
+static void exynos_dsi_bridge_enable(struct drm_bridge *bridge)
{
- struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+ struct exynos_dsi *dsi = bridge_to_dsi(bridge);
struct drm_bridge *iter;
int ret;
@@ -1429,9 +1430,9 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
pm_runtime_put(dsi->dev);
}
-static void exynos_dsi_disable(struct drm_encoder *encoder)
+static void exynos_dsi_bridge_disable(struct drm_bridge *bridge)
{
- struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+ struct exynos_dsi *dsi = bridge_to_dsi(bridge);
struct drm_bridge *iter;
if (!(dsi->state & DSIM_STATE_ENABLED))
@@ -1494,9 +1495,9 @@ static const struct drm_connector_helper_funcs
exynos_dsi_connector_helper_funcs
.get_modes = exynos_dsi_get_modes,
};
-static int exynos_dsi_create_connector(struct drm_encoder *encoder)
+static int exynos_dsi_create_connector(struct exynos_dsi *dsi)
{
- struct exynos_dsi *dsi = encoder_to_dsi(encoder);
+ struct drm_encoder *encoder = &dsi->encoder;
struct drm_connector *connector = &dsi->connector;
struct drm_device *drm = encoder->dev;
int ret;
@@ -1522,9 +1523,16 @@ static int exynos_dsi_create_connector(struct
drm_encoder *encoder)
return 0;
}
-static const struct drm_encoder_helper_funcs exynos_dsi_encoder_helper_funcs =
{
- .enable = exynos_dsi_enable,
- .disable = exynos_dsi_disable,
+static int exynos_dsi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ return 0;
+}
+
+static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = {
+ .enable = exynos_dsi_bridge_enable,
+ .disable = exynos_dsi_bridge_disable,
+ .attach = exynos_dsi_bridge_attach,
};
MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
@@ -1543,7 +1551,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host
*host,
dsi->out_bridge = out_bridge;
list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain);
} else {
- int ret = exynos_dsi_create_connector(encoder);
+ int ret = exynos_dsi_create_connector(dsi);
if (ret) {
DRM_DEV_ERROR(dsi->dev,
@@ -1596,7 +1604,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host
*host,
if (dsi->panel) {
mutex_lock(&drm->mode_config.mutex);
- exynos_dsi_disable(&dsi->encoder);
+ exynos_dsi_bridge_disable(&dsi->bridge);
dsi->panel = NULL;
dsi->connector.status = connector_status_disconnected;
mutex_unlock(&drm->mode_config.mutex);
@@ -1702,12 +1710,16 @@ static int exynos_dsi_bind(struct device *dev, struct
device *master,
drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
- drm_encoder_helper_add(encoder, &exynos_dsi_encoder_helper_funcs);
-
ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
if (ret < 0)
return ret;
+ ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL, 0);
+ if (ret) {
+ drm_encoder_cleanup(&dsi->encoder);
+ return ret;
+ }
+
in_bridge_node = of_graph_get_remote_node(dev->of_node, DSI_PORT_IN, 0);
if (in_bridge_node) {
in_bridge = of_drm_find_bridge(in_bridge_node);
@@ -1723,10 +1735,9 @@ static void exynos_dsi_unbind(struct device *dev, struct
device *master,
void *data)
{
struct exynos_dsi *dsi = dev_get_drvdata(dev);
- struct drm_encoder *encoder = &dsi->encoder;
-
- exynos_dsi_disable(encoder);
+ exynos_dsi_bridge_disable(&dsi->bridge);
+ drm_encoder_cleanup(&dsi->encoder);
mipi_dsi_host_unregister(&dsi->dsi_host);
}
@@ -1821,6 +1832,12 @@ static int exynos_dsi_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
+ dsi->bridge.funcs = &exynos_dsi_bridge_funcs;
+ dsi->bridge.of_node = dev->of_node;
+ dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+
+ drm_bridge_add(&dsi->bridge);
+
ret = component_add(dev, &exynos_dsi_component_ops);
if (ret)
goto err_disable_runtime;
@@ -1835,6 +1852,10 @@ static int exynos_dsi_probe(struct platform_device *pdev)
static int exynos_dsi_remove(struct platform_device *pdev)
{
+ struct exynos_dsi *dsi = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&dsi->bridge);
+
pm_runtime_disable(&pdev->dev);
component_del(&pdev->dev, &exynos_dsi_component_ops);
--
2.25.1
