/* * Copyright 2015 Freescale Semiconductor, Inc. * * Freescale DCU drm device driver * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/backlight.h> #include <linux/of_graph.h> #include <drm/drmP.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_of.h> #include <drm/drm_panel.h> #include "fsl_dcu_drm_drv.h" #include "fsl_tcon.h" static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder) { drm_encoder_cleanup(encoder); } static const struct drm_encoder_funcs encoder_funcs = { .destroy = fsl_dcu_drm_encoder_destroy, }; 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_encoder_init(fsl_dev->drm, encoder, &encoder_funcs, DRM_MODE_ENCODER_LVDS, NULL); if (ret < 0) return ret; return 0; } static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector) { struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector); drm_connector_unregister(connector); drm_panel_detach(fsl_con->panel); 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; int (*get_modes)(struct drm_panel *panel); int num_modes = 0; fsl_connector = to_fsl_dcu_connector(connector); if (fsl_connector->panel && fsl_connector->panel->funcs && fsl_connector->panel->funcs->get_modes) { get_modes = fsl_connector->panel->funcs->get_modes; num_modes = get_modes(fsl_connector->panel); } return num_modes; } static int 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_mode_connector_attach_encoder(connector, encoder); if (ret < 0) goto err_sysfs; ret = drm_panel_attach(panel, connector); if (ret) { dev_err(fsl_dev->dev, "failed to attach panel\n"); 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 (!fsl_dev->connector.panel) return -EPROBE_DEFER; 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); }