[PATCH v5 0/5] drm/bridge: Update tc358767 and nxp-ptn3460 to support chained bridges

[PATCH v5 0/5] drm/bridge: Update tc358767 and nxp-ptn3460 to support chained bridges

[Sam Ravnborg]

This patch-set aims to make connector creation optional
and prepare the bridge drivers for use in a chained setup.

The objective is that all bridge drivers shall support a chained setup
connector creation is moved to the display drivers.
This is just one step on this path.

The general approach for the bridge drivers:
- Introduce bridge operations
- Introduce use of panel bridge and make connector creation optional

v5:
  - Applied reviewed patches, so we went from 15 to 5
  - Fixed bug in connector creation in both drivers

v4:
  - Dropped patch for ti-sn65dsi86. Await full conversion
  - Dropped patch for ti-tpd12s015. It was wrong (Laurent)
  - Drop boe,hv070wsa-100 patch, it was applied
  - Combined a few patches to fix connector created twice (Laurent)
  - Fix memory leak in get_edid (Laurent)
  - Added patch to validate panel descriptions in panel-simple
  - Set bridge.type in relevant drivers
 
v3:
  - Rebase on top of drm-misc-next
  - Address kbuild test robot feedback
 
v2:
  - Updated bus_flags for boe,hv070wsa-100
  - Collected r-b, but did not apply patches yet
  - On the panel side the panel-simple driver gained a default
    connector type for all the dumb panels that do not
    include so in their description.
    With this change panels always provide a connector type,
    and we have the potential to drop most uses of
    devm_drm_panel_bridge_add_typed().
  - Added conversion of a few more bridge drivers

Patches can build but no run-time testing.
So both test and review feedback appreciated!

	Sam


Sam Ravnborg (5):
      drm/bridge: tc358767: add detect bridge operation
      drm/bridge: tc358767: add get_edid bridge operation
      drm/bridge: tc358767: add drm_panel_bridge support
      drm/bridge: nxp-ptn3460: add get_edid bridge operation
      drm/bridge: nxp-ptn3460: add drm_panel_bridge support

 drivers/gpu/drm/bridge/nxp-ptn3460.c | 103 +++++++++++++---------------
 drivers/gpu/drm/bridge/tc358767.c    | 126 +++++++++++++++++++----------------
 2 files changed, 114 insertions(+), 115 deletions(-)


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[PATCH v5 1/5] drm/bridge: tc358767: add detect bridge operation

[Sam Ravnborg]

Prepare the bridge driver for chained operation by adding
support for the detect operation.

v3:
  - Fix code to make it readable (Laurent)

v2:
  - Do not announce detect operation if there is no hpd pin (Laurent)

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/tc358767.c | 30 ++++++++++++++++++++----------
 1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index c2777b226c75..bde89e213882 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1369,21 +1369,13 @@ static const struct drm_connector_helper_funcs tc_connector_helper_funcs = {
 	.get_modes = tc_connector_get_modes,
 };
 
-static enum drm_connector_status tc_connector_detect(struct drm_connector *connector,
-						     bool force)
+static enum drm_connector_status tc_bridge_detect(struct drm_bridge *bridge)
 {
-	struct tc_data *tc = connector_to_tc(connector);
+	struct tc_data *tc = bridge_to_tc(bridge);
 	bool conn;
 	u32 val;
 	int ret;
 
-	if (tc->hpd_pin < 0) {
-		if (tc->panel)
-			return connector_status_connected;
-		else
-			return connector_status_unknown;
-	}
-
 	ret = regmap_read(tc->regmap, GPIOI, &val);
 	if (ret)
 		return connector_status_unknown;
@@ -1396,6 +1388,20 @@ static enum drm_connector_status tc_connector_detect(struct drm_connector *conne
 		return connector_status_disconnected;
 }
 
+static enum drm_connector_status
+tc_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct tc_data *tc = connector_to_tc(connector);
+
+	if (tc->hpd_pin >= 0)
+		return tc_bridge_detect(&tc->bridge);
+
+	if (tc->panel)
+		return connector_status_connected;
+	else
+		return connector_status_unknown;
+}
+
 static const struct drm_connector_funcs tc_connector_funcs = {
 	.detect = tc_connector_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
@@ -1458,6 +1464,7 @@ static const struct drm_bridge_funcs tc_bridge_funcs = {
 	.disable = tc_bridge_disable,
 	.post_disable = tc_bridge_post_disable,
 	.mode_fixup = tc_bridge_mode_fixup,
+	.detect = tc_bridge_detect,
 };
 
 static bool tc_readable_reg(struct device *dev, unsigned int reg)
@@ -1680,6 +1687,9 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		return ret;
 
 	tc->bridge.funcs = &tc_bridge_funcs;
+	if (tc->hpd_pin >= 0)
+		tc->bridge.ops |= DRM_BRIDGE_OP_DETECT;
+
 	tc->bridge.of_node = dev->of_node;
 	drm_bridge_add(&tc->bridge);
 
-- 
2.25.1

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[PATCH v5 2/5] drm/bridge: tc358767: add get_edid bridge operation

[Sam Ravnborg]

Prepare for chained bridge with the addition of
get_edid support.

v2:
  - Fixed handling of edid storage (Laurent)

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/tc358767.c | 34 ++++++++++++++++---------------
 1 file changed, 18 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index bde89e213882..b26c669f3e91 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -250,8 +250,6 @@ struct tc_data {
 	/* link settings */
 	struct tc_edp_link	link;
 
-	/* display edid */
-	struct edid		*edid;
 	/* current mode */
 	struct drm_display_mode	mode;
 
@@ -1335,11 +1333,19 @@ static void tc_bridge_mode_set(struct drm_bridge *bridge,
 	tc->mode = *mode;
 }
 
+static struct edid *tc_get_edid(struct drm_bridge *bridge,
+				struct drm_connector *connector)
+{
+	struct tc_data *tc = bridge_to_tc(bridge);
+
+	return drm_get_edid(connector, &tc->aux.ddc);
+}
+
 static int tc_connector_get_modes(struct drm_connector *connector)
 {
 	struct tc_data *tc = connector_to_tc(connector);
+	int num_modes;
 	struct edid *edid;
-	int count;
 	int ret;
 
 	ret = tc_get_display_props(tc);
@@ -1348,21 +1354,15 @@ static int tc_connector_get_modes(struct drm_connector *connector)
 		return 0;
 	}
 
-	count = drm_panel_get_modes(tc->panel, connector);
-	if (count > 0)
-		return count;
-
-	edid = drm_get_edid(connector, &tc->aux.ddc);
-
-	kfree(tc->edid);
-	tc->edid = edid;
-	if (!edid)
-		return 0;
+	num_modes = drm_panel_get_modes(tc->panel, connector);
+	if (num_modes > 0)
+		return num_modes;
 
-	drm_connector_update_edid_property(connector, edid);
-	count = drm_add_edid_modes(connector, edid);
+	edid = tc_get_edid(&tc->bridge, connector);
+	num_modes = drm_add_edid_modes(connector, edid);
+	kfree(edid);
 
-	return count;
+	return num_modes;
 }
 
 static const struct drm_connector_helper_funcs tc_connector_helper_funcs = {
@@ -1465,6 +1465,7 @@ static const struct drm_bridge_funcs tc_bridge_funcs = {
 	.post_disable = tc_bridge_post_disable,
 	.mode_fixup = tc_bridge_mode_fixup,
 	.detect = tc_bridge_detect,
+	.get_edid = tc_get_edid,
 };
 
 static bool tc_readable_reg(struct device *dev, unsigned int reg)
@@ -1689,6 +1690,7 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	tc->bridge.funcs = &tc_bridge_funcs;
 	if (tc->hpd_pin >= 0)
 		tc->bridge.ops |= DRM_BRIDGE_OP_DETECT;
+	tc->bridge.ops |= DRM_BRIDGE_OP_EDID;
 
 	tc->bridge.of_node = dev->of_node;
 	drm_bridge_add(&tc->bridge);
-- 
2.25.1

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[PATCH v5 3/5] drm/bridge: tc358767: add drm_panel_bridge support

[Sam Ravnborg]

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@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@ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@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@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

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[PATCH v5 4/5] drm/bridge: nxp-ptn3460: add get_edid bridge operation

[Sam Ravnborg]

Add the get_edid() bridge operation to prepare for
use as a chained bridge.
Add helper function that is also used by the connector.

v2:
  - Fix memory leak (Laurent)
  - Do not save a copy of edid, read it when needed

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/nxp-ptn3460.c | 43 ++++++++++++++++------------
 1 file changed, 25 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 438e566ce0a4..2805c8938f98 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -29,7 +29,6 @@ struct ptn3460_bridge {
 	struct drm_connector connector;
 	struct i2c_client *client;
 	struct drm_bridge bridge;
-	struct edid *edid;
 	struct drm_panel *panel;
 	struct gpio_desc *gpio_pd_n;
 	struct gpio_desc *gpio_rst_n;
@@ -184,17 +183,13 @@ static void ptn3460_post_disable(struct drm_bridge *bridge)
 	}
 }
 
-static int ptn3460_get_modes(struct drm_connector *connector)
+static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
+				     struct drm_connector *connector)
 {
-	struct ptn3460_bridge *ptn_bridge;
-	u8 *edid;
-	int ret, num_modes = 0;
+	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
 	bool power_off;
-
-	ptn_bridge = connector_to_ptn3460(connector);
-
-	if (ptn_bridge->edid)
-		return drm_add_edid_modes(connector, ptn_bridge->edid);
+	u8 *edid;
+	int ret;
 
 	power_off = !ptn_bridge->enabled;
 	ptn3460_pre_enable(&ptn_bridge->bridge);
@@ -202,30 +197,40 @@ static int ptn3460_get_modes(struct drm_connector *connector)
 	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
 	if (!edid) {
 		DRM_ERROR("Failed to allocate EDID\n");
-		return 0;
+		goto out;
 	}
 
 	ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,
-			EDID_LENGTH);
+				 EDID_LENGTH);
 	if (ret) {
 		kfree(edid);
+		edid = NULL;
 		goto out;
 	}
 
-	ptn_bridge->edid = (struct edid *)edid;
-	drm_connector_update_edid_property(connector, ptn_bridge->edid);
-
-	num_modes = drm_add_edid_modes(connector, ptn_bridge->edid);
-
 out:
 	if (power_off)
 		ptn3460_disable(&ptn_bridge->bridge);
 
+	return (struct edid *)edid;
+}
+
+static int ptn3460_connector_get_modes(struct drm_connector *connector)
+{
+	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
+	struct edid *edid;
+	int num_modes;
+
+	edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
+	drm_connector_update_edid_property(connector, edid);
+	num_modes = drm_add_edid_modes(connector, edid);
+	kfree(edid);
+
 	return num_modes;
 }
 
 static const struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
-	.get_modes = ptn3460_get_modes,
+	.get_modes = ptn3460_connector_get_modes,
 };
 
 static const struct drm_connector_funcs ptn3460_connector_funcs = {
@@ -279,6 +284,7 @@ static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.disable = ptn3460_disable,
 	.post_disable = ptn3460_post_disable,
 	.attach = ptn3460_bridge_attach,
+	.get_edid = ptn3460_get_edid,
 };
 
 static int ptn3460_probe(struct i2c_client *client,
@@ -327,6 +333,7 @@ static int ptn3460_probe(struct i2c_client *client,
 	}
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+	ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
 	ptn_bridge->bridge.of_node = dev->of_node;
 	drm_bridge_add(&ptn_bridge->bridge);
 
-- 
2.25.1

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[PATCH v5 5/5] drm/bridge: nxp-ptn3460: add drm_panel_bridge support

[Sam Ravnborg]

Prepare the bridge driver for use in a chained setup.

- Replacing direct use of drm_panel with drm_panel_bridge support.
- Make the connector creation optional

Note: the bridge panel will use the connector type from the panel.

v3:
  - Fix wrong logic in connector creation (Laurent)

v2:
  - Use panel_bridge for local variable name to align with other drivers
  - Fix that connector was created twice (Laurent)
  - Set bridge.type to DRM_MODE_CONNECTOR_LVDS.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/nxp-ptn3460.c | 60 ++++++++++------------------
 1 file changed, 20 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 2805c8938f98..391c1f66f60f 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -29,7 +29,7 @@ struct ptn3460_bridge {
 	struct drm_connector connector;
 	struct i2c_client *client;
 	struct drm_bridge bridge;
-	struct drm_panel *panel;
+	struct drm_bridge *panel_bridge;
 	struct gpio_desc *gpio_pd_n;
 	struct gpio_desc *gpio_rst_n;
 	u32 edid_emulation;
@@ -126,11 +126,6 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 	usleep_range(10, 20);
 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
 
-	if (drm_panel_prepare(ptn_bridge->panel)) {
-		DRM_ERROR("failed to prepare panel\n");
-		return;
-	}
-
 	/*
 	 * There's a bug in the PTN chip where it falsely asserts hotplug before
 	 * it is fully functional. We're forced to wait for the maximum start up
@@ -145,16 +140,6 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
 	ptn_bridge->enabled = true;
 }
 
-static void ptn3460_enable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	if (drm_panel_enable(ptn_bridge->panel)) {
-		DRM_ERROR("failed to enable panel\n");
-		return;
-	}
-}
-
 static void ptn3460_disable(struct drm_bridge *bridge)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
@@ -164,24 +149,10 @@ static void ptn3460_disable(struct drm_bridge *bridge)
 
 	ptn_bridge->enabled = false;
 
-	if (drm_panel_disable(ptn_bridge->panel)) {
-		DRM_ERROR("failed to disable panel\n");
-		return;
-	}
-
 	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
 	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
 }
 
-static void ptn3460_post_disable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	if (drm_panel_unprepare(ptn_bridge->panel)) {
-		DRM_ERROR("failed to unprepare panel\n");
-		return;
-	}
-}
 
 static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
 				     struct drm_connector *connector)
@@ -245,12 +216,18 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
 				 enum drm_bridge_attach_flags flags)
 {
 	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+	enum drm_bridge_attach_flags panel_flags;
 	int ret;
 
-	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
-		DRM_ERROR("Fix bridge driver to make connector optional!");
-		return -EINVAL;
-	}
+	/* Let this driver create connector if requested */
+	panel_flags = flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+	ret = drm_bridge_attach(bridge->encoder, ptn_bridge->panel_bridge,
+				bridge, panel_flags);
+	if (ret < 0)
+		return ret;
+
+	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+		return 0;
 
 	if (!bridge->encoder) {
 		DRM_ERROR("Parent encoder object not found");
@@ -270,9 +247,6 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
 	drm_connector_attach_encoder(&ptn_bridge->connector,
 							bridge->encoder);
 
-	if (ptn_bridge->panel)
-		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
-
 	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
 
 	return ret;
@@ -280,9 +254,7 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
 
 static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
 	.pre_enable = ptn3460_pre_enable,
-	.enable = ptn3460_enable,
 	.disable = ptn3460_disable,
-	.post_disable = ptn3460_post_disable,
 	.attach = ptn3460_bridge_attach,
 	.get_edid = ptn3460_get_edid,
 };
@@ -292,6 +264,8 @@ static int ptn3460_probe(struct i2c_client *client,
 {
 	struct device *dev = &client->dev;
 	struct ptn3460_bridge *ptn_bridge;
+	struct drm_bridge *panel_bridge;
+	struct drm_panel *panel;
 	int ret;
 
 	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
@@ -299,10 +273,15 @@ static int ptn3460_probe(struct i2c_client *client,
 		return -ENOMEM;
 	}
 
-	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &ptn_bridge->panel, NULL);
+	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, NULL);
 	if (ret)
 		return ret;
 
+	panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+	if (IS_ERR(panel_bridge))
+		return PTR_ERR(panel_bridge);
+
+	ptn_bridge->panel_bridge = panel_bridge;
 	ptn_bridge->client = client;
 
 	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",
@@ -334,6 +313,7 @@ static int ptn3460_probe(struct i2c_client *client,
 
 	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
 	ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
+	ptn_bridge->bridge.type = DRM_MODE_CONNECTOR_LVDS;
 	ptn_bridge->bridge.of_node = dev->of_node;
 	drm_bridge_add(&ptn_bridge->bridge);
 
-- 
2.25.1

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Re: [PATCH v5 3/5] drm/bridge: tc358767: add drm_panel_bridge support

[Laurent Pinchart]

Hi Sam,

Thank you for the patch.

On Mon, Jul 27, 2020 at 07:03:18PM +0200, Sam Ravnborg wrote:
> 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@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@ravnborg.org>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Jonas Karlman <jonas@kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec@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);

You could write this

					flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);

and drop the panel_flags variable.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +		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@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))

-- 
Regards,

Laurent Pinchart
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Re: [PATCH v5 5/5] drm/bridge: nxp-ptn3460: add drm_panel_bridge support

[Laurent Pinchart]

Hi Sam,

Thank you for the patch.

On Mon, Jul 27, 2020 at 07:03:20PM +0200, Sam Ravnborg wrote:
> Prepare the bridge driver for use in a chained setup.
> 
> - Replacing direct use of drm_panel with drm_panel_bridge support.
> - Make the connector creation optional
> 
> Note: the bridge panel will use the connector type from the panel.
> 
> v3:
>   - Fix wrong logic in connector creation (Laurent)
> 
> v2:
>   - Use panel_bridge for local variable name to align with other drivers
>   - Fix that connector was created twice (Laurent)
>   - Set bridge.type to DRM_MODE_CONNECTOR_LVDS.
> 
> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Neil Armstrong <narmstrong@baylibre.com>
> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
> Cc: Jonas Karlman <jonas@kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/nxp-ptn3460.c | 60 ++++++++++------------------
>  1 file changed, 20 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
> index 2805c8938f98..391c1f66f60f 100644
> --- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
> +++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
> @@ -29,7 +29,7 @@ struct ptn3460_bridge {
>  	struct drm_connector connector;
>  	struct i2c_client *client;
>  	struct drm_bridge bridge;
> -	struct drm_panel *panel;
> +	struct drm_bridge *panel_bridge;
>  	struct gpio_desc *gpio_pd_n;
>  	struct gpio_desc *gpio_rst_n;
>  	u32 edid_emulation;
> @@ -126,11 +126,6 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
>  	usleep_range(10, 20);
>  	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
>  
> -	if (drm_panel_prepare(ptn_bridge->panel)) {
> -		DRM_ERROR("failed to prepare panel\n");
> -		return;
> -	}
> -
>  	/*
>  	 * There's a bug in the PTN chip where it falsely asserts hotplug before
>  	 * it is fully functional. We're forced to wait for the maximum start up
> @@ -145,16 +140,6 @@ static void ptn3460_pre_enable(struct drm_bridge *bridge)
>  	ptn_bridge->enabled = true;
>  }
>  
> -static void ptn3460_enable(struct drm_bridge *bridge)
> -{
> -	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
> -
> -	if (drm_panel_enable(ptn_bridge->panel)) {
> -		DRM_ERROR("failed to enable panel\n");
> -		return;
> -	}
> -}
> -
>  static void ptn3460_disable(struct drm_bridge *bridge)
>  {
>  	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
> @@ -164,24 +149,10 @@ static void ptn3460_disable(struct drm_bridge *bridge)
>  
>  	ptn_bridge->enabled = false;
>  
> -	if (drm_panel_disable(ptn_bridge->panel)) {
> -		DRM_ERROR("failed to disable panel\n");
> -		return;
> -	}
> -
>  	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
>  	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
>  }
>  
> -static void ptn3460_post_disable(struct drm_bridge *bridge)
> -{
> -	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
> -
> -	if (drm_panel_unprepare(ptn_bridge->panel)) {
> -		DRM_ERROR("failed to unprepare panel\n");
> -		return;
> -	}
> -}
>  
>  static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
>  				     struct drm_connector *connector)
> @@ -245,12 +216,18 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
>  				 enum drm_bridge_attach_flags flags)
>  {
>  	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
> +	enum drm_bridge_attach_flags panel_flags;
>  	int ret;
>  
> -	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
> -		DRM_ERROR("Fix bridge driver to make connector optional!");
> -		return -EINVAL;
> -	}
> +	/* Let this driver create connector if requested */
> +	panel_flags = flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR;
> +	ret = drm_bridge_attach(bridge->encoder, ptn_bridge->panel_bridge,
> +				bridge, panel_flags);

Same here, you could write

				flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +	if (ret < 0)
> +		return ret;
> +
> +	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
> +		return 0;
>  
>  	if (!bridge->encoder) {
>  		DRM_ERROR("Parent encoder object not found");
> @@ -270,9 +247,6 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
>  	drm_connector_attach_encoder(&ptn_bridge->connector,
>  							bridge->encoder);
>  
> -	if (ptn_bridge->panel)
> -		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
> -
>  	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
>  
>  	return ret;
> @@ -280,9 +254,7 @@ static int ptn3460_bridge_attach(struct drm_bridge *bridge,
>  
>  static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
>  	.pre_enable = ptn3460_pre_enable,
> -	.enable = ptn3460_enable,
>  	.disable = ptn3460_disable,
> -	.post_disable = ptn3460_post_disable,
>  	.attach = ptn3460_bridge_attach,
>  	.get_edid = ptn3460_get_edid,
>  };
> @@ -292,6 +264,8 @@ static int ptn3460_probe(struct i2c_client *client,
>  {
>  	struct device *dev = &client->dev;
>  	struct ptn3460_bridge *ptn_bridge;
> +	struct drm_bridge *panel_bridge;
> +	struct drm_panel *panel;
>  	int ret;
>  
>  	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
> @@ -299,10 +273,15 @@ static int ptn3460_probe(struct i2c_client *client,
>  		return -ENOMEM;
>  	}
>  
> -	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &ptn_bridge->panel, NULL);
> +	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, NULL);
>  	if (ret)
>  		return ret;
>  
> +	panel_bridge = devm_drm_panel_bridge_add(dev, panel);
> +	if (IS_ERR(panel_bridge))
> +		return PTR_ERR(panel_bridge);
> +
> +	ptn_bridge->panel_bridge = panel_bridge;
>  	ptn_bridge->client = client;
>  
>  	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",
> @@ -334,6 +313,7 @@ static int ptn3460_probe(struct i2c_client *client,
>  
>  	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
>  	ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
> +	ptn_bridge->bridge.type = DRM_MODE_CONNECTOR_LVDS;
>  	ptn_bridge->bridge.of_node = dev->of_node;
>  	drm_bridge_add(&ptn_bridge->bridge);
>  

-- 
Regards,

Laurent Pinchart
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Re: [PATCH v5 0/5] drm/bridge: Update tc358767 and nxp-ptn3460 to support chained bridges

[Sam Ravnborg]

Hi all.

On Mon, Jul 27, 2020 at 07:03:15PM +0200, Sam Ravnborg wrote:
> This patch-set aims to make connector creation optional
> and prepare the bridge drivers for use in a chained setup.
> 
> The objective is that all bridge drivers shall support a chained setup
> connector creation is moved to the display drivers.
> This is just one step on this path.
> 
> The general approach for the bridge drivers:
> - Introduce bridge operations
> - Introduce use of panel bridge and make connector creation optional
> 
> v5:
>   - Applied reviewed patches, so we went from 15 to 5
>   - Fixed bug in connector creation in both drivers
> 
> v4:
>   - Dropped patch for ti-sn65dsi86. Await full conversion
>   - Dropped patch for ti-tpd12s015. It was wrong (Laurent)
>   - Drop boe,hv070wsa-100 patch, it was applied
>   - Combined a few patches to fix connector created twice (Laurent)
>   - Fix memory leak in get_edid (Laurent)
>   - Added patch to validate panel descriptions in panel-simple
>   - Set bridge.type in relevant drivers
>  
> v3:
>   - Rebase on top of drm-misc-next
>   - Address kbuild test robot feedback
>  
> v2:
>   - Updated bus_flags for boe,hv070wsa-100
>   - Collected r-b, but did not apply patches yet
>   - On the panel side the panel-simple driver gained a default
>     connector type for all the dumb panels that do not
>     include so in their description.
>     With this change panels always provide a connector type,
>     and we have the potential to drop most uses of
>     devm_drm_panel_bridge_add_typed().
>   - Added conversion of a few more bridge drivers
> 
> Patches can build but no run-time testing.
> So both test and review feedback appreciated!
> 
> 	Sam
> 
> 
> Sam Ravnborg (5):
>       drm/bridge: tc358767: add detect bridge operation
>       drm/bridge: tc358767: add get_edid bridge operation
>       drm/bridge: tc358767: add drm_panel_bridge support
>       drm/bridge: nxp-ptn3460: add get_edid bridge operation
>       drm/bridge: nxp-ptn3460: add drm_panel_bridge support

Fixed up per Laurent's suggestion and applied to drm-misc-next.

	Sam


> 
>  drivers/gpu/drm/bridge/nxp-ptn3460.c | 103 +++++++++++++---------------
>  drivers/gpu/drm/bridge/tc358767.c    | 126 +++++++++++++++++++----------------
>  2 files changed, 114 insertions(+), 115 deletions(-)
> 
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