309 lines
8.1 KiB
C
309 lines
8.1 KiB
C
/*
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* Copyright (C) 2014 Traphandler
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* Copyright (C) 2014 Free Electrons
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* Copyright (C) 2014 Atmel
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*
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* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
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* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_panel.h>
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#include "atmel_hlcdc_dc.h"
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/**
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* Atmel HLCDC RGB output mode
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*/
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enum atmel_hlcdc_connector_rgb_mode {
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ATMEL_HLCDC_CONNECTOR_RGB444,
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ATMEL_HLCDC_CONNECTOR_RGB565,
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ATMEL_HLCDC_CONNECTOR_RGB666,
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ATMEL_HLCDC_CONNECTOR_RGB888,
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};
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/**
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* Atmel HLCDC RGB connector structure
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*
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* This structure stores RGB slave device information.
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*
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* @connector: DRM connector
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* @encoder: DRM encoder
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* @dc: pointer to the atmel_hlcdc_dc structure
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* @dpms: current DPMS mode
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*/
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struct atmel_hlcdc_rgb_output {
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struct drm_connector connector;
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struct drm_encoder encoder;
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struct atmel_hlcdc_dc *dc;
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int dpms;
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};
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static inline struct atmel_hlcdc_rgb_output *
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drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
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{
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return container_of(connector, struct atmel_hlcdc_rgb_output,
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connector);
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}
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static inline struct atmel_hlcdc_rgb_output *
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drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
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{
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return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
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}
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/**
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* Atmel HLCDC Panel device structure
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*
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* This structure is specialization of the slave device structure to
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* interface with drm panels.
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*
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* @base: base slave device fields
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* @panel: drm panel attached to this slave device
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*/
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struct atmel_hlcdc_panel {
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struct atmel_hlcdc_rgb_output base;
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struct drm_panel *panel;
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};
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static inline struct atmel_hlcdc_panel *
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atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output)
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{
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return container_of(output, struct atmel_hlcdc_panel, base);
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}
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static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
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struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
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drm_panel_enable(panel->panel);
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}
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static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
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struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
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drm_panel_disable(panel->panel);
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}
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static bool
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atmel_hlcdc_panel_encoder_mode_fixup(struct drm_encoder *encoder,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted)
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{
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return true;
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}
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static void
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atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
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struct drm_display_info *info = &rgb->connector.display_info;
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unsigned int cfg;
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cfg = 0;
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if (info->num_bus_formats) {
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switch (info->bus_formats[0]) {
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case MEDIA_BUS_FMT_RGB666_1X18:
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cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
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break;
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case MEDIA_BUS_FMT_RGB888_1X24:
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cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
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break;
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default:
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break;
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}
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}
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regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
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ATMEL_HLCDC_MODE_MASK,
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cfg);
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}
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static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
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.mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
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.mode_set = atmel_hlcdc_rgb_encoder_mode_set,
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.disable = atmel_hlcdc_panel_encoder_disable,
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.enable = atmel_hlcdc_panel_encoder_enable,
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};
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static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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memset(encoder, 0, sizeof(*encoder));
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}
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static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
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.destroy = atmel_hlcdc_rgb_encoder_destroy,
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};
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static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_connector_to_atmel_hlcdc_rgb_output(connector);
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struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
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return panel->panel->funcs->get_modes(panel->panel);
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}
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static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_connector_to_atmel_hlcdc_rgb_output(connector);
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return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
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}
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static struct drm_encoder *
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atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_connector_to_atmel_hlcdc_rgb_output(connector);
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return &rgb->encoder;
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}
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static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
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.get_modes = atmel_hlcdc_panel_get_modes,
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.mode_valid = atmel_hlcdc_rgb_mode_valid,
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.best_encoder = atmel_hlcdc_rgb_best_encoder,
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};
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static enum drm_connector_status
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atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
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{
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return connector_status_connected;
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}
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static void
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atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
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{
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struct atmel_hlcdc_rgb_output *rgb =
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drm_connector_to_atmel_hlcdc_rgb_output(connector);
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struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
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drm_panel_detach(panel->panel);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
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.dpms = drm_atomic_helper_connector_dpms,
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.detect = atmel_hlcdc_panel_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = atmel_hlcdc_panel_connector_destroy,
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.reset = drm_atomic_helper_connector_reset,
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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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};
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static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
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struct of_endpoint *ep)
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{
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struct atmel_hlcdc_dc *dc = dev->dev_private;
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struct device_node *np;
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struct drm_panel *p = NULL;
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struct atmel_hlcdc_panel *panel;
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int ret;
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np = of_graph_get_remote_port_parent(ep->local_node);
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if (!np)
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return -EINVAL;
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p = of_drm_find_panel(np);
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of_node_put(np);
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if (!p)
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return -EPROBE_DEFER;
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panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
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if (!panel)
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return -EINVAL;
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panel->base.dpms = DRM_MODE_DPMS_OFF;
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panel->base.dc = dc;
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drm_encoder_helper_add(&panel->base.encoder,
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&atmel_hlcdc_panel_encoder_helper_funcs);
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ret = drm_encoder_init(dev, &panel->base.encoder,
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&atmel_hlcdc_panel_encoder_funcs,
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DRM_MODE_ENCODER_LVDS);
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if (ret)
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return ret;
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panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
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panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
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drm_connector_helper_add(&panel->base.connector,
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&atmel_hlcdc_panel_connector_helper_funcs);
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ret = drm_connector_init(dev, &panel->base.connector,
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&atmel_hlcdc_panel_connector_funcs,
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DRM_MODE_CONNECTOR_LVDS);
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if (ret)
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goto err_encoder_cleanup;
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drm_mode_connector_attach_encoder(&panel->base.connector,
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&panel->base.encoder);
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panel->base.encoder.possible_crtcs = 0x1;
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drm_panel_attach(p, &panel->base.connector);
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panel->panel = p;
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return 0;
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err_encoder_cleanup:
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drm_encoder_cleanup(&panel->base.encoder);
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return ret;
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}
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int atmel_hlcdc_create_outputs(struct drm_device *dev)
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{
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struct device_node *port_np, *np;
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struct of_endpoint ep;
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int ret;
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port_np = of_get_child_by_name(dev->dev->of_node, "port");
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if (!port_np)
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return -EINVAL;
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np = of_get_child_by_name(port_np, "endpoint");
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of_node_put(port_np);
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if (!np)
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return -EINVAL;
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ret = of_graph_parse_endpoint(np, &ep);
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of_node_put(port_np);
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if (ret)
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return ret;
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/* We currently only support panel output */
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return atmel_hlcdc_create_panel_output(dev, &ep);
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}
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