156 lines
3.9 KiB
C
156 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*
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* Freescale DCU drm device driver
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*/
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#include <linux/backlight.h>
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#include <linux/of_graph.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_probe_helper.h>
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#include "fsl_dcu_drm_drv.h"
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#include "fsl_tcon.h"
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static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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static const struct drm_encoder_funcs encoder_funcs = {
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.destroy = fsl_dcu_drm_encoder_destroy,
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};
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int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
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struct drm_crtc *crtc)
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{
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struct drm_encoder *encoder = &fsl_dev->encoder;
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int ret;
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encoder->possible_crtcs = 1;
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/* Use bypass mode for parallel RGB/LVDS encoder */
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if (fsl_dev->tcon)
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fsl_tcon_bypass_enable(fsl_dev->tcon);
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ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
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DRM_MODE_ENCODER_LVDS, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
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{
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struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
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drm_connector_unregister(connector);
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drm_panel_detach(fsl_con->panel);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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.destroy = fsl_dcu_drm_connector_destroy,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.reset = drm_atomic_helper_connector_reset,
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};
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static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
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{
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struct fsl_dcu_drm_connector *fsl_connector;
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fsl_connector = to_fsl_dcu_connector(connector);
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return drm_panel_get_modes(fsl_connector->panel, connector);
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}
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static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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if (mode->hdisplay & 0xf)
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return MODE_ERROR;
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return MODE_OK;
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}
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static const struct drm_connector_helper_funcs connector_helper_funcs = {
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.get_modes = fsl_dcu_drm_connector_get_modes,
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.mode_valid = fsl_dcu_drm_connector_mode_valid,
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};
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static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
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struct drm_panel *panel)
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{
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struct drm_encoder *encoder = &fsl_dev->encoder;
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struct drm_connector *connector = &fsl_dev->connector.base;
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int ret;
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fsl_dev->connector.encoder = encoder;
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ret = drm_connector_init(fsl_dev->drm, connector,
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&fsl_dcu_drm_connector_funcs,
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DRM_MODE_CONNECTOR_LVDS);
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if (ret < 0)
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return ret;
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drm_connector_helper_add(connector, &connector_helper_funcs);
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ret = drm_connector_register(connector);
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if (ret < 0)
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goto err_cleanup;
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ret = drm_connector_attach_encoder(connector, encoder);
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if (ret < 0)
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goto err_sysfs;
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ret = drm_panel_attach(panel, connector);
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if (ret) {
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dev_err(fsl_dev->dev, "failed to attach panel\n");
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goto err_sysfs;
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}
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return 0;
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err_sysfs:
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drm_connector_unregister(connector);
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err_cleanup:
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drm_connector_cleanup(connector);
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return ret;
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}
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int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
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{
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struct device_node *panel_node;
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struct drm_panel *panel;
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struct drm_bridge *bridge;
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int ret;
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/* This is for backward compatibility */
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panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
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if (panel_node) {
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fsl_dev->connector.panel = of_drm_find_panel(panel_node);
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of_node_put(panel_node);
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if (IS_ERR(fsl_dev->connector.panel))
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return PTR_ERR(fsl_dev->connector.panel);
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return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
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}
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ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
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if (ret)
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return ret;
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if (panel) {
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fsl_dev->connector.panel = panel;
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return fsl_dcu_attach_panel(fsl_dev, panel);
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}
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return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
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}
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