The drm panel bridge creates a connector using a connector type explicit
passed by the display controller or bridge driver that instantiates the
panel bridge. Now that drm_panel reports its connector type, we can use
it to avoid passing an explicit (and often incorrect) connector type to
drm_panel_bridge_add() and devm_drm_panel_bridge_add().
Several drivers report incorrect or unknown connector types to
userspace. Reporting a different type may result in a breakage. For that
reason, rename (devm_)drm_panel_bridge_add() to
(devm_)drm_panel_bridge_add_typed(), and add new
(devm_)drm_panel_bridge_add() functions that use the panel connector
type. Update all callers of (devm_)drm_panel_bridge_add() to the _typed
function, they will be converted one by one after testing.
The panel drivers have been updated with the following Coccinelle
semantic patch, with manual inspection and fixes to indentation.
@@
expression bridge;
expression dev;
expression panel;
identifier type;
@@
(
-bridge = drm_panel_bridge_add(panel, type);
+bridge = drm_panel_bridge_add_typed(panel, type);
|
-bridge = devm_drm_panel_bridge_add(dev, panel, type);
+bridge = devm_drm_panel_bridge_add_typed(dev, panel, type);
)
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
Changes since v1:
- Add and use _typed variants
---
.../gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 3 +-
drivers/gpu/drm/bridge/cdns-dsi.c | 3 +-
drivers/gpu/drm/bridge/lvds-encoder.c | 3 +-
drivers/gpu/drm/bridge/panel.c | 69 ++++++++++++++++---
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 3 +-
drivers/gpu/drm/ingenic/ingenic-drm.c | 4 +-
drivers/gpu/drm/mcde/mcde_dsi.c | 4 +-
drivers/gpu/drm/pl111/pl111_drv.c | 4 +-
drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 4 +-
drivers/gpu/drm/rockchip/rockchip_rgb.c | 3 +-
drivers/gpu/drm/stm/ltdc.c | 4 +-
drivers/gpu/drm/tilcdc/tilcdc_external.c | 4 +-
drivers/gpu/drm/tve200/tve200_drv.c | 4 +-
drivers/gpu/drm/vc4/vc4_dpi.c | 3 +-
drivers/gpu/drm/vc4/vc4_dsi.c | 4 +-
include/drm/drm_bridge.h | 11 +--
16 files changed, 93 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
index 375fa84c548b..121b62682d80 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -107,7 +107,8 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, int endpoint)
output->encoder.possible_crtcs = 0x1;
if (panel) {
- bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_Unknown);
if (IS_ERR(bridge))
return PTR_ERR(bridge);
}
diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
index 6166dca6be81..3a5bd4e7fd1e 100644
--- a/drivers/gpu/drm/bridge/cdns-dsi.c
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -956,7 +956,8 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
panel = of_drm_find_panel(np);
if (!IS_ERR(panel)) {
- bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DSI);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
} else {
bridge = of_drm_find_bridge(dev->dev.of_node);
if (!bridge)
diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c b/drivers/gpu/drm/bridge/lvds-encoder.c
index 2ab2c234f26c..e2132a8d5106 100644
--- a/drivers/gpu/drm/bridge/lvds-encoder.c
+++ b/drivers/gpu/drm/bridge/lvds-encoder.c
@@ -106,7 +106,8 @@ static int lvds_encoder_probe(struct platform_device *pdev)
}
lvds_encoder->panel_bridge =
- devm_drm_panel_bridge_add(dev, panel, DRM_MODE_CONNECTOR_LVDS);
+ devm_drm_panel_bridge_add_typed(dev, panel,
+ DRM_MODE_CONNECTOR_LVDS);
if (IS_ERR(lvds_encoder->panel_bridge))
return PTR_ERR(lvds_encoder->panel_bridge);
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index b12ae3a4c5f1..9d20d4a297ee 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -133,8 +133,6 @@ static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
* just calls the appropriate functions from &drm_panel.
*
* @panel: The drm_panel being wrapped. Must be non-NULL.
- * @connector_type: The DRM_MODE_CONNECTOR_* for the connector to be
- * created.
*
* For drivers converting from directly using drm_panel: The expected
* usage pattern is that during either encoder module probe or DSI
@@ -148,11 +146,37 @@ static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
* drm_mode_config_cleanup() if the bridge has already been attached), then
* drm_panel_bridge_remove() to free it.
*
+ * The connector type is set to @panel->connector_type, which must be set to a
+ * known type. Calling this function with a panel whose connector type is
+ * DRM_MODE_CONNECTOR_Unknown will return NULL.
+ *
* See devm_drm_panel_bridge_add() for an automatically manged version of this
* function.
*/
-struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
- u32 connector_type)
+struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel)
+{
+ if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown))
+ return NULL;
+
+ return drm_panel_bridge_add_typed(panel, panel->connector_type);
+}
+EXPORT_SYMBOL(drm_panel_bridge_add);
+
+/**
+ * drm_panel_bridge_add_typed - Creates a &drm_bridge and &drm_connector with
+ * an explicit connector type.
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ * @connector_type: The connector type (DRM_MODE_CONNECTOR_*)
+ *
+ * This is just like drm_panel_bridge_add(), but forces the connector type to
+ * @connector_type instead of infering it from the panel.
+ *
+ * This function is deprecated and should not be used in new drivers. Use
+ * drm_panel_bridge_add() instead, and fix panel drivers as necessary if they
+ * don't report a connector type.
+ */
+struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel,
+ u32 connector_type)
{
struct panel_bridge *panel_bridge;
@@ -176,7 +200,7 @@ struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
return &panel_bridge->bridge;
}
-EXPORT_SYMBOL(drm_panel_bridge_add);
+EXPORT_SYMBOL(drm_panel_bridge_add_typed);
/**
* drm_panel_bridge_remove - Unregisters and frees a drm_bridge
@@ -213,15 +237,38 @@ static void devm_drm_panel_bridge_release(struct device *dev, void *res)
* that just calls the appropriate functions from &drm_panel.
* @dev: device to tie the bridge lifetime to
* @panel: The drm_panel being wrapped. Must be non-NULL.
- * @connector_type: The DRM_MODE_CONNECTOR_* for the connector to be
- * created.
*
* This is the managed version of drm_panel_bridge_add() which automatically
* calls drm_panel_bridge_remove() when @dev is unbound.
*/
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
- struct drm_panel *panel,
- u32 connector_type)
+ struct drm_panel *panel)
+{
+ if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown))
+ return NULL;
+
+ return devm_drm_panel_bridge_add_typed(dev, panel,
+ panel->connector_type);
+}
+EXPORT_SYMBOL(devm_drm_panel_bridge_add);
+
+/**
+ * devm_drm_panel_bridge_add_typed - Creates a managed &drm_bridge and
+ * &drm_connector with an explicit connector type.
+ * @dev: device to tie the bridge lifetime to
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ * @connector_type: The connector type (DRM_MODE_CONNECTOR_*)
+ *
+ * This is just like devm_drm_panel_bridge_add(), but forces the connector type
+ * to @connector_type instead of infering it from the panel.
+ *
+ * This function is deprecated and should not be used in new drivers. Use
+ * devm_drm_panel_bridge_add() instead, and fix panel drivers as necessary if
+ * they don't report a connector type.
+ */
+struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev,
+ struct drm_panel *panel,
+ u32 connector_type)
{
struct drm_bridge **ptr, *bridge;
@@ -230,7 +277,7 @@ struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
if (!ptr)
return ERR_PTR(-ENOMEM);
- bridge = drm_panel_bridge_add(panel, connector_type);
+ bridge = drm_panel_bridge_add_typed(panel, connector_type);
if (!IS_ERR(bridge)) {
*ptr = bridge;
devres_add(dev, ptr);
@@ -240,4 +287,4 @@ struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
return bridge;
}
-EXPORT_SYMBOL(devm_drm_panel_bridge_add);
+EXPORT_SYMBOL(devm_drm_panel_bridge_add_typed);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 675442bfc1bd..b8b1c288f663 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -316,7 +316,8 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
return ret;
if (panel) {
- bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DSI);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(bridge))
return PTR_ERR(bridge);
}
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.c b/drivers/gpu/drm/ingenic/ingenic-drm.c
index ce1fae3a78a9..73fd33d2595c 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.c
@@ -676,8 +676,8 @@ static int ingenic_drm_probe(struct platform_device *pdev)
}
if (panel) {
- bridge = devm_drm_panel_bridge_add(dev, panel,
- DRM_MODE_CONNECTOR_Unknown);
+ bridge = devm_drm_panel_bridge_add_typed(dev, panel,
+ DRM_MODE_CONNECTOR_Unknown);
}
priv->dma_hwdesc = dma_alloc_coherent(dev, sizeof(*priv->dma_hwdesc),
diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
index 07f7090d08b3..ffb55d3b662c 100644
--- a/drivers/gpu/drm/mcde/mcde_dsi.c
+++ b/drivers/gpu/drm/mcde/mcde_dsi.c
@@ -922,8 +922,8 @@ static int mcde_dsi_bind(struct device *dev, struct device *master,
}
}
if (panel) {
- bridge = drm_panel_bridge_add(panel,
- DRM_MODE_CONNECTOR_DSI);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(bridge)) {
dev_err(dev, "error adding panel bridge\n");
return PTR_ERR(bridge);
diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c
index 276b53473a84..63dfcda04147 100644
--- a/drivers/gpu/drm/pl111/pl111_drv.c
+++ b/drivers/gpu/drm/pl111/pl111_drv.c
@@ -150,8 +150,8 @@ static int pl111_modeset_init(struct drm_device *dev)
return -EPROBE_DEFER;
if (panel) {
- bridge = drm_panel_bridge_add(panel,
- DRM_MODE_CONNECTOR_Unknown);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_Unknown);
if (IS_ERR(bridge)) {
ret = PTR_ERR(bridge);
goto out_config;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
index 0f00bdfe2366..f940d0c6aeb9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_encoder.c
@@ -84,8 +84,8 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
goto done;
}
- bridge = devm_drm_panel_bridge_add(rcdu->dev, panel,
- DRM_MODE_CONNECTOR_DPI);
+ bridge = devm_drm_panel_bridge_add_typed(rcdu->dev, panel,
+ DRM_MODE_CONNECTOR_DPI);
if (IS_ERR(bridge)) {
ret = PTR_ERR(bridge);
goto done;
diff --git a/drivers/gpu/drm/rockchip/rockchip_rgb.c b/drivers/gpu/drm/rockchip/rockchip_rgb.c
index 89e0bb0fe0ab..a3ba0d5914e8 100644
--- a/drivers/gpu/drm/rockchip/rockchip_rgb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_rgb.c
@@ -135,7 +135,8 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
if (panel) {
- bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_LVDS);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_LVDS);
if (IS_ERR(bridge))
return ERR_CAST(bridge);
}
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 3ab4fbf8eb0d..7cdab685b527 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -1236,8 +1236,8 @@ int ltdc_load(struct drm_device *ddev)
/* Add endpoints panels or bridges if any */
for (i = 0; i < MAX_ENDPOINTS; i++) {
if (panel[i]) {
- bridge[i] = drm_panel_bridge_add(panel[i],
- DRM_MODE_CONNECTOR_DPI);
+ bridge[i] = drm_panel_bridge_add_typed(panel[i],
+ DRM_MODE_CONNECTOR_DPI);
if (IS_ERR(bridge[i])) {
DRM_ERROR("panel-bridge endpoint %d\n", i);
ret = PTR_ERR(bridge[i]);
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
index 43d756b7810e..39e9a97610db 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -139,8 +139,8 @@ int tilcdc_attach_external_device(struct drm_device *ddev)
}
if (panel) {
- bridge = devm_drm_panel_bridge_add(ddev->dev, panel,
- DRM_MODE_CONNECTOR_DPI);
+ bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel,
+ DRM_MODE_CONNECTOR_DPI);
if (IS_ERR(bridge)) {
ret = PTR_ERR(bridge);
goto err_encoder_cleanup;
diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c
index 416f24823c0a..954b09c948eb 100644
--- a/drivers/gpu/drm/tve200/tve200_drv.c
+++ b/drivers/gpu/drm/tve200/tve200_drv.c
@@ -80,8 +80,8 @@ static int tve200_modeset_init(struct drm_device *dev)
if (ret && ret != -ENODEV)
return ret;
if (panel) {
- bridge = drm_panel_bridge_add(panel,
- DRM_MODE_CONNECTOR_Unknown);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_Unknown);
if (IS_ERR(bridge)) {
ret = PTR_ERR(bridge);
goto out_bridge;
diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index 8a27a6acee61..c586325de2a5 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -249,7 +249,8 @@ static int vc4_dpi_init_bridge(struct vc4_dpi *dpi)
}
if (panel)
- bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DPI);
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DPI);
return drm_bridge_attach(dpi->encoder, bridge, NULL);
}
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index c78fa8144776..bf4d2a1a22dc 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -1575,8 +1575,8 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
}
if (panel) {
- dsi->bridge = devm_drm_panel_bridge_add(dev, panel,
- DRM_MODE_CONNECTOR_DSI);
+ dsi->bridge = devm_drm_panel_bridge_add_typed(dev, panel,
+ DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(dsi->bridge))
return PTR_ERR(dsi->bridge);
}
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 7616f6562fe4..1a4b8ecf5bdb 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -429,12 +429,15 @@ void drm_atomic_bridge_enable(struct drm_bridge *bridge,
struct drm_atomic_state *state);
#ifdef CONFIG_DRM_PANEL_BRIDGE
-struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
- u32 connector_type);
+struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel);
+struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel,
+ u32 connector_type);
void drm_panel_bridge_remove(struct drm_bridge *bridge);
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
- struct drm_panel *panel,
- u32 connector_type);
+ struct drm_panel *panel);
+struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev,
+ struct drm_panel *panel,
+ u32 connector_type);
#endif
#endif
--
Regards,
Laurent Pinchart
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