// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2015 Freescale Semiconductor, Inc. * * Freescale DCU drm device driver */ #include <linux/backlight.h> #include <linux/of_graph.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #include "fsl_dcu_drm_drv.h" #include "fsl_tcon.h" int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev, struct drm_crtc *crtc) { struct drm_encoder *encoder = &fsl_dev->encoder; int ret; encoder->possible_crtcs = 1; /* Use bypass mode for parallel RGB/LVDS encoder */ if (fsl_dev->tcon) fsl_tcon_bypass_enable(fsl_dev->tcon); ret = drm_simple_encoder_init(fsl_dev->drm, encoder, DRM_MODE_ENCODER_LVDS); if (ret < 0) return ret; return 0; } static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector) { drm_connector_unregister(connector); drm_connector_cleanup(connector); } static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = { .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, .destroy = fsl_dcu_drm_connector_destroy, .fill_modes = drm_helper_probe_single_connector_modes, .reset = drm_atomic_helper_connector_reset, }; static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector) { struct fsl_dcu_drm_connector *fsl_connector; fsl_connector = to_fsl_dcu_connector(connector); return drm_panel_get_modes(fsl_connector->panel, connector); } static enum drm_mode_status fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { if (mode->hdisplay & 0xf) return MODE_ERROR; return MODE_OK; } static const struct drm_connector_helper_funcs connector_helper_funcs = { .get_modes = fsl_dcu_drm_connector_get_modes, .mode_valid = fsl_dcu_drm_connector_mode_valid, }; static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev, struct drm_panel *panel) { struct drm_encoder *encoder = &fsl_dev->encoder; struct drm_connector *connector = &fsl_dev->connector.base; int ret; fsl_dev->connector.encoder = encoder; ret = drm_connector_init(fsl_dev->drm, connector, &fsl_dcu_drm_connector_funcs, DRM_MODE_CONNECTOR_LVDS); if (ret < 0) return ret; drm_connector_helper_add(connector, &connector_helper_funcs); ret = drm_connector_register(connector); if (ret < 0) goto err_cleanup; ret = drm_connector_attach_encoder(connector, encoder); if (ret < 0) goto err_sysfs; return 0; err_sysfs: drm_connector_unregister(connector); err_cleanup: drm_connector_cleanup(connector); return ret; } int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev) { struct device_node *panel_node; struct drm_panel *panel; struct drm_bridge *bridge; int ret; /* This is for backward compatibility */ panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0); if (panel_node) { fsl_dev->connector.panel = of_drm_find_panel(panel_node); of_node_put(panel_node); if (IS_ERR(fsl_dev->connector.panel)) return PTR_ERR(fsl_dev->connector.panel); return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel); } ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge); if (ret) return ret; if (panel) { fsl_dev->connector.panel = panel; return fsl_dcu_attach_panel(fsl_dev, panel); } return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0); }
You are looking at a code browser for Linux.
By using this web interface, you can navigate the source code of Linux by following simple links, search it by using the box in the navigation bar, or use vi inspired key bindings to move within files.
It should all be pretty intuitive, but to get started, here are a few things you may want to try:
This site was generated via sbexr, which uses LLVM and clang to parse and index the code.
sbexr is free software (as in "free speech"), under heavy development. sbexr.rabexc.org and the Linux kernel source code are used as a playground to test new features, observe bugs, and gather feedback. Check there often if you want to see new features in action.
As of today, the best way to know more about the project or participate in the development is to join the mailing list, and follow the project on github.