[PATCH v5 3/5] drm/bridge: tc358767: add drm_panel_bridge support
Sam Ravnborg
sam at ravnborg.org
Mon Jul 27 17:03:18 UTC 2020
With the bridge operations implemented the last step to prepare
this driver for a chained setup is the use of the bridge panel driver.
The bridge panel driver is only used when a port at 2 is present in
the DT. So when the display driver requests a connector
support both situations:
- connector created by bridge panel driver
- connector created by this driver
And on top, support that the display driver creates the connector,
which is the preferred setup.
Note: the bridge panel will use the connector type from the panel.
v3:
- Fix wrong logic in connector creation (Laurent)
v2:
- Merge connector and drm_panel_bridge patches
and fix so we do not create two connectors (Laurent)
Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Andrzej Hajda <a.hajda at samsung.com>
Cc: Neil Armstrong <narmstrong at baylibre.com>
Cc: Jonas Karlman <jonas at kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec at siol.net>
---
drivers/gpu/drm/bridge/tc358767.c | 70 +++++++++++++++----------------
1 file changed, 35 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index b26c669f3e91..cbad2607ab43 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -244,8 +244,8 @@ struct tc_data {
struct drm_dp_aux aux;
struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
struct drm_connector connector;
- struct drm_panel *panel;
/* link settings */
struct tc_edp_link link;
@@ -1234,13 +1234,6 @@ static int tc_stream_disable(struct tc_data *tc)
return 0;
}
-static void tc_bridge_pre_enable(struct drm_bridge *bridge)
-{
- struct tc_data *tc = bridge_to_tc(bridge);
-
- drm_panel_prepare(tc->panel);
-}
-
static void tc_bridge_enable(struct drm_bridge *bridge)
{
struct tc_data *tc = bridge_to_tc(bridge);
@@ -1264,8 +1257,6 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
tc_main_link_disable(tc);
return;
}
-
- drm_panel_enable(tc->panel);
}
static void tc_bridge_disable(struct drm_bridge *bridge)
@@ -1273,8 +1264,6 @@ static void tc_bridge_disable(struct drm_bridge *bridge)
struct tc_data *tc = bridge_to_tc(bridge);
int ret;
- drm_panel_disable(tc->panel);
-
ret = tc_stream_disable(tc);
if (ret < 0)
dev_err(tc->dev, "main link stream stop error: %d\n", ret);
@@ -1284,13 +1273,6 @@ static void tc_bridge_disable(struct drm_bridge *bridge)
dev_err(tc->dev, "main link disable error: %d\n", ret);
}
-static void tc_bridge_post_disable(struct drm_bridge *bridge)
-{
- struct tc_data *tc = bridge_to_tc(bridge);
-
- drm_panel_unprepare(tc->panel);
-}
-
static bool tc_bridge_mode_fixup(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
struct drm_display_mode *adj)
@@ -1354,9 +1336,11 @@ static int tc_connector_get_modes(struct drm_connector *connector)
return 0;
}
- num_modes = drm_panel_get_modes(tc->panel, connector);
- if (num_modes > 0)
- return num_modes;
+ if (tc->panel_bridge) {
+ num_modes = drm_bridge_get_modes(tc->panel_bridge, connector);
+ if (num_modes > 0)
+ return num_modes;
+ }
edid = tc_get_edid(&tc->bridge, connector);
num_modes = drm_add_edid_modes(connector, edid);
@@ -1396,7 +1380,7 @@ tc_connector_detect(struct drm_connector *connector, bool force)
if (tc->hpd_pin >= 0)
return tc_bridge_detect(&tc->bridge);
- if (tc->panel)
+ if (tc->panel_bridge)
return connector_status_connected;
else
return connector_status_unknown;
@@ -1419,16 +1403,23 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
struct drm_device *drm = bridge->dev;
int ret;
- if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
- DRM_ERROR("Fix bridge driver to make connector optional!");
- return -EINVAL;
+ if (tc->panel_bridge) {
+ enum drm_bridge_attach_flags panel_flags;
+
+ /* If a connector is required then this driver shall create it */
+ panel_flags = flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+ ret = drm_bridge_attach(tc->bridge.encoder, tc->panel_bridge,
+ &tc->bridge, panel_flags);
+ if (ret)
+ return ret;
}
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
/* Create DP/eDP connector */
drm_connector_helper_add(&tc->connector, &tc_connector_helper_funcs);
- ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs,
- tc->panel ? DRM_MODE_CONNECTOR_eDP :
- DRM_MODE_CONNECTOR_DisplayPort);
+ ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs, tc->bridge.type);
if (ret)
return ret;
@@ -1441,9 +1432,6 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
DRM_CONNECTOR_POLL_DISCONNECT;
}
- if (tc->panel)
- drm_panel_attach(tc->panel, &tc->connector);
-
drm_display_info_set_bus_formats(&tc->connector.display_info,
&bus_format, 1);
tc->connector.display_info.bus_flags =
@@ -1459,10 +1447,8 @@ static const struct drm_bridge_funcs tc_bridge_funcs = {
.attach = tc_bridge_attach,
.mode_valid = tc_mode_valid,
.mode_set = tc_bridge_mode_set,
- .pre_enable = tc_bridge_pre_enable,
.enable = tc_bridge_enable,
.disable = tc_bridge_disable,
- .post_disable = tc_bridge_post_disable,
.mode_fixup = tc_bridge_mode_fixup,
.detect = tc_bridge_detect,
.get_edid = tc_get_edid,
@@ -1555,6 +1541,7 @@ static irqreturn_t tc_irq_handler(int irq, void *arg)
static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
+ struct drm_panel *panel;
struct tc_data *tc;
int ret;
@@ -1565,10 +1552,23 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
tc->dev = dev;
/* port at 2 is the output port */
- ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &tc->panel, NULL);
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, NULL);
if (ret && ret != -ENODEV)
return ret;
+ if (panel) {
+ struct drm_bridge *panel_bridge;
+
+ panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ tc->panel_bridge = panel_bridge;
+ tc->bridge.type = DRM_MODE_CONNECTOR_eDP;
+ } else {
+ tc->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
+ }
+
/* Shut down GPIO is optional */
tc->sd_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
if (IS_ERR(tc->sd_gpio))
--
2.25.1
More information about the dri-devel
mailing list