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- // 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 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_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);
- }
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