Another 100 lines of boilerplate gone, while allowing for bridges to be connected in the display chain.
Signed-off-by: Eric Anholt eric@anholt.net --- drivers/gpu/drm/vc4/vc4_dpi.c | 164 ++++++++---------------------------------- 1 file changed, 30 insertions(+), 134 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c index c6d703903fd9..98532e2cd2b7 100644 --- a/drivers/gpu/drm/vc4/vc4_dpi.c +++ b/drivers/gpu/drm/vc4/vc4_dpi.c @@ -23,8 +23,10 @@ */
#include "drm_atomic_helper.h" +#include "drm_bridge.h" #include "drm_crtc_helper.h" #include "drm_edid.h" +#include "drm_of.h" #include "drm_panel.h" #include "linux/clk.h" #include "linux/component.h" @@ -95,7 +97,8 @@ struct vc4_dpi {
struct drm_encoder *encoder; struct drm_connector *connector; - struct drm_panel *panel; + struct drm_bridge *bridge; + bool is_panel_bridge;
void __iomem *regs;
@@ -118,24 +121,6 @@ to_vc4_dpi_encoder(struct drm_encoder *encoder) return container_of(encoder, struct vc4_dpi_encoder, base.base); }
-/* VC4 DPI connector KMS struct */ -struct vc4_dpi_connector { - struct drm_connector base; - struct vc4_dpi *dpi; - - /* Since the connector is attached to just the one encoder, - * this is the reference to it so we can do the best_encoder() - * hook. - */ - struct drm_encoder *encoder; -}; - -static inline struct vc4_dpi_connector * -to_vc4_dpi_connector(struct drm_connector *connector) -{ - return container_of(connector, struct vc4_dpi_connector, base); -} - #define DPI_REG(reg) { reg, #reg } static const struct { u32 reg; @@ -167,80 +152,6 @@ int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused) } #endif
-static enum drm_connector_status -vc4_dpi_connector_detect(struct drm_connector *connector, bool force) -{ - struct vc4_dpi_connector *vc4_connector = - to_vc4_dpi_connector(connector); - struct vc4_dpi *dpi = vc4_connector->dpi; - - if (dpi->panel) - return connector_status_connected; - else - return connector_status_disconnected; -} - -static void vc4_dpi_connector_destroy(struct drm_connector *connector) -{ - drm_connector_unregister(connector); - drm_connector_cleanup(connector); -} - -static int vc4_dpi_connector_get_modes(struct drm_connector *connector) -{ - struct vc4_dpi_connector *vc4_connector = - to_vc4_dpi_connector(connector); - struct vc4_dpi *dpi = vc4_connector->dpi; - - if (dpi->panel) - return drm_panel_get_modes(dpi->panel); - - return 0; -} - -static const struct drm_connector_funcs vc4_dpi_connector_funcs = { - .dpms = drm_atomic_helper_connector_dpms, - .detect = vc4_dpi_connector_detect, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = vc4_dpi_connector_destroy, - .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, -}; - -static const struct drm_connector_helper_funcs vc4_dpi_connector_helper_funcs = { - .get_modes = vc4_dpi_connector_get_modes, -}; - -static struct drm_connector *vc4_dpi_connector_init(struct drm_device *dev, - struct vc4_dpi *dpi) -{ - struct drm_connector *connector = NULL; - struct vc4_dpi_connector *dpi_connector; - - dpi_connector = devm_kzalloc(dev->dev, sizeof(*dpi_connector), - GFP_KERNEL); - if (!dpi_connector) - return ERR_PTR(-ENOMEM); - - connector = &dpi_connector->base; - - dpi_connector->encoder = dpi->encoder; - dpi_connector->dpi = dpi; - - drm_connector_init(dev, connector, &vc4_dpi_connector_funcs, - DRM_MODE_CONNECTOR_DPI); - drm_connector_helper_add(connector, &vc4_dpi_connector_helper_funcs); - - connector->polled = 0; - connector->interlace_allowed = 0; - connector->doublescan_allowed = 0; - - drm_mode_connector_attach_encoder(connector, dpi->encoder); - - return connector; -} - static const struct drm_encoder_funcs vc4_dpi_encoder_funcs = { .destroy = drm_encoder_cleanup, }; @@ -250,11 +161,7 @@ static void vc4_dpi_encoder_disable(struct drm_encoder *encoder) struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder); struct vc4_dpi *dpi = vc4_encoder->dpi;
- drm_panel_disable(dpi->panel); - clk_disable_unprepare(dpi->pixel_clock); - - drm_panel_unprepare(dpi->panel); }
static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) @@ -265,12 +172,6 @@ static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) u32 dpi_c = DPI_ENABLE | DPI_OUTPUT_ENABLE_MODE; int ret;
- ret = drm_panel_prepare(dpi->panel); - if (ret) { - DRM_ERROR("Panel failed to prepare\n"); - return; - } - if (dpi->connector->display_info.num_bus_formats) { u32 bus_format = dpi->connector->display_info.bus_formats[0];
@@ -321,13 +222,6 @@ static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) ret = clk_prepare_enable(dpi->pixel_clock); if (ret) DRM_ERROR("Failed to set clock rate: %d\n", ret); - - ret = drm_panel_enable(dpi->panel); - if (ret) { - DRM_ERROR("Panel failed to enable\n"); - drm_panel_unprepare(dpi->panel); - return; - } }
static bool vc4_dpi_encoder_mode_fixup(struct drm_encoder *encoder, @@ -351,24 +245,34 @@ static const struct of_device_id vc4_dpi_dt_match[] = { {} };
-/* Walks the OF graph to find the panel node and then asks DRM to look - * up the panel. +/* Sets up the next link in the display chain, whether it's a panel or + * a bridge. */ -static struct drm_panel *vc4_dpi_get_panel(struct device *dev) +static int vc4_dpi_init_bridge(struct vc4_dpi *dpi) { - struct device_node *panel_node; - struct device_node *np = dev->of_node; + struct device *dev = &dpi->pdev->dev; struct drm_panel *panel; + int ret;
- /* don't proceed if we have an endpoint but no panel_node tied to it */ - panel_node = of_graph_get_remote_node(np, 0, 0); - if (!panel_node) - return NULL; + ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, + &panel, &dpi->bridge); + if (ret) { + /* If nothing was connected in the DT, that's not an + * error. + */ + if (ret == -ENODEV) + return 0; + else + return ret; + }
- panel = of_drm_find_panel(panel_node); - of_node_put(panel_node); + if (panel) { + dpi->bridge = drm_panel_bridge_add(panel, + DRM_MODE_CONNECTOR_DPI); + dpi->is_panel_bridge = true; + }
- return panel; + return drm_bridge_attach(dpi->encoder, dpi->bridge, NULL); }
static int vc4_dpi_bind(struct device *dev, struct device *master, void *data) @@ -422,20 +326,13 @@ static int vc4_dpi_bind(struct device *dev, struct device *master, void *data) if (ret) DRM_ERROR("Failed to turn on core clock: %d\n", ret);
- dpi->panel = vc4_dpi_get_panel(dev); - drm_encoder_init(drm, dpi->encoder, &vc4_dpi_encoder_funcs, DRM_MODE_ENCODER_DPI, NULL); drm_encoder_helper_add(dpi->encoder, &vc4_dpi_encoder_helper_funcs);
- dpi->connector = vc4_dpi_connector_init(drm, dpi); - if (IS_ERR(dpi->connector)) { - ret = PTR_ERR(dpi->connector); + ret = vc4_dpi_init_bridge(dpi); + if (ret) goto err_destroy_encoder; - } - - if (dpi->panel) - drm_panel_attach(dpi->panel, dpi->connector);
dev_set_drvdata(dev, dpi);
@@ -456,10 +353,9 @@ static void vc4_dpi_unbind(struct device *dev, struct device *master, struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_dpi *dpi = dev_get_drvdata(dev);
- if (dpi->panel) - drm_panel_detach(dpi->panel); + if (dpi->is_panel_bridge) + drm_panel_bridge_remove(dpi->bridge);
- vc4_dpi_connector_destroy(dpi->connector); drm_encoder_cleanup(dpi->encoder);
clk_disable_unprepare(dpi->core_clock);