From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 308 +++++++++++++++++++++++ 1 file changed, 308 insertions(+) create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c (limited to 'drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c') diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c new file mode 100644 index 000000000..9c4513005 --- /dev/null +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c @@ -0,0 +1,308 @@ +/* + * Copyright (C) 2014 Traphandler + * Copyright (C) 2014 Free Electrons + * Copyright (C) 2014 Atmel + * + * Author: Jean-Jacques Hiblot + * Author: Boris BREZILLON + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include + +#include +#include + +#include "atmel_hlcdc_dc.h" + +/** + * Atmel HLCDC RGB output mode + */ +enum atmel_hlcdc_connector_rgb_mode { + ATMEL_HLCDC_CONNECTOR_RGB444, + ATMEL_HLCDC_CONNECTOR_RGB565, + ATMEL_HLCDC_CONNECTOR_RGB666, + ATMEL_HLCDC_CONNECTOR_RGB888, +}; + +/** + * Atmel HLCDC RGB connector structure + * + * This structure stores RGB slave device information. + * + * @connector: DRM connector + * @encoder: DRM encoder + * @dc: pointer to the atmel_hlcdc_dc structure + * @dpms: current DPMS mode + */ +struct atmel_hlcdc_rgb_output { + struct drm_connector connector; + struct drm_encoder encoder; + struct atmel_hlcdc_dc *dc; + int dpms; +}; + +static inline struct atmel_hlcdc_rgb_output * +drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector) +{ + return container_of(connector, struct atmel_hlcdc_rgb_output, + connector); +} + +static inline struct atmel_hlcdc_rgb_output * +drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder) +{ + return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder); +} + +/** + * Atmel HLCDC Panel device structure + * + * This structure is specialization of the slave device structure to + * interface with drm panels. + * + * @base: base slave device fields + * @panel: drm panel attached to this slave device + */ +struct atmel_hlcdc_panel { + struct atmel_hlcdc_rgb_output base; + struct drm_panel *panel; +}; + +static inline struct atmel_hlcdc_panel * +atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output) +{ + return container_of(output, struct atmel_hlcdc_panel, base); +} + +static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_encoder_to_atmel_hlcdc_rgb_output(encoder); + struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb); + + drm_panel_enable(panel->panel); +} + +static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_encoder_to_atmel_hlcdc_rgb_output(encoder); + struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb); + + drm_panel_disable(panel->panel); +} + +static bool +atmel_hlcdc_panel_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + return true; +} + +static void +atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_encoder_to_atmel_hlcdc_rgb_output(encoder); + struct drm_display_info *info = &rgb->connector.display_info; + unsigned int cfg; + + cfg = 0; + + if (info->num_bus_formats) { + switch (info->bus_formats[0]) { + case MEDIA_BUS_FMT_RGB666_1X18: + cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8; + break; + case MEDIA_BUS_FMT_RGB888_1X24: + cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8; + break; + default: + break; + } + } + + regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5), + ATMEL_HLCDC_MODE_MASK, + cfg); +} + +static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = { + .mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup, + .mode_set = atmel_hlcdc_rgb_encoder_mode_set, + .disable = atmel_hlcdc_panel_encoder_disable, + .enable = atmel_hlcdc_panel_encoder_enable, +}; + +static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); + memset(encoder, 0, sizeof(*encoder)); +} + +static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = { + .destroy = atmel_hlcdc_rgb_encoder_destroy, +}; + +static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_connector_to_atmel_hlcdc_rgb_output(connector); + struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb); + + return panel->panel->funcs->get_modes(panel->panel); +} + +static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_connector_to_atmel_hlcdc_rgb_output(connector); + + return atmel_hlcdc_dc_mode_valid(rgb->dc, mode); +} + + + +static struct drm_encoder * +atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_connector_to_atmel_hlcdc_rgb_output(connector); + + return &rgb->encoder; +} + +static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = { + .get_modes = atmel_hlcdc_panel_get_modes, + .mode_valid = atmel_hlcdc_rgb_mode_valid, + .best_encoder = atmel_hlcdc_rgb_best_encoder, +}; + +static enum drm_connector_status +atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static void +atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector) +{ + struct atmel_hlcdc_rgb_output *rgb = + drm_connector_to_atmel_hlcdc_rgb_output(connector); + struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb); + + drm_panel_detach(panel->panel); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = atmel_hlcdc_panel_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = atmel_hlcdc_panel_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int atmel_hlcdc_create_panel_output(struct drm_device *dev, + struct of_endpoint *ep) +{ + struct atmel_hlcdc_dc *dc = dev->dev_private; + struct device_node *np; + struct drm_panel *p = NULL; + struct atmel_hlcdc_panel *panel; + int ret; + + np = of_graph_get_remote_port_parent(ep->local_node); + if (!np) + return -EINVAL; + + p = of_drm_find_panel(np); + of_node_put(np); + + if (!p) + return -EPROBE_DEFER; + + panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL); + if (!panel) + return -EINVAL; + + panel->base.dpms = DRM_MODE_DPMS_OFF; + + panel->base.dc = dc; + + drm_encoder_helper_add(&panel->base.encoder, + &atmel_hlcdc_panel_encoder_helper_funcs); + ret = drm_encoder_init(dev, &panel->base.encoder, + &atmel_hlcdc_panel_encoder_funcs, + DRM_MODE_ENCODER_LVDS); + if (ret) + return ret; + + panel->base.connector.dpms = DRM_MODE_DPMS_OFF; + panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT; + drm_connector_helper_add(&panel->base.connector, + &atmel_hlcdc_panel_connector_helper_funcs); + ret = drm_connector_init(dev, &panel->base.connector, + &atmel_hlcdc_panel_connector_funcs, + DRM_MODE_CONNECTOR_LVDS); + if (ret) + goto err_encoder_cleanup; + + drm_mode_connector_attach_encoder(&panel->base.connector, + &panel->base.encoder); + panel->base.encoder.possible_crtcs = 0x1; + + drm_panel_attach(p, &panel->base.connector); + panel->panel = p; + + return 0; + +err_encoder_cleanup: + drm_encoder_cleanup(&panel->base.encoder); + + return ret; +} + +int atmel_hlcdc_create_outputs(struct drm_device *dev) +{ + struct device_node *port_np, *np; + struct of_endpoint ep; + int ret; + + port_np = of_get_child_by_name(dev->dev->of_node, "port"); + if (!port_np) + return -EINVAL; + + np = of_get_child_by_name(port_np, "endpoint"); + of_node_put(port_np); + + if (!np) + return -EINVAL; + + ret = of_graph_parse_endpoint(np, &ep); + of_node_put(port_np); + + if (ret) + return ret; + + /* We currently only support panel output */ + return atmel_hlcdc_create_panel_output(dev, &ep); +} -- cgit v1.2.3-54-g00ecf