2014-03-17 16:03:56 +04:00
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/*
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* Exynos DRM Parallel output support.
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*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd
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*
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* Contacts: Andrzej Hajda <a.hajda@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_panel.h>
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#include <linux/regulator/consumer.h>
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#include <video/of_videomode.h>
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#include <video/videomode.h>
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#include "exynos_drm_drv.h"
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struct exynos_dpi {
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struct device *dev;
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struct device_node *panel_node;
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struct drm_panel *panel;
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struct drm_connector connector;
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struct drm_encoder *encoder;
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struct videomode *vm;
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int dpms_mode;
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};
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#define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
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static enum drm_connector_status
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exynos_dpi_detect(struct drm_connector *connector, bool force)
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{
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struct exynos_dpi *ctx = connector_to_dpi(connector);
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2014-06-11 00:57:57 +04:00
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if (ctx->panel && !ctx->panel->connector)
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2014-04-03 18:26:00 +04:00
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drm_panel_attach(ctx->panel, &ctx->connector);
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2014-03-17 16:03:56 +04:00
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2014-04-03 18:26:00 +04:00
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return connector_status_connected;
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2014-03-17 16:03:56 +04:00
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}
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static void exynos_dpi_connector_destroy(struct drm_connector *connector)
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{
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2014-05-29 19:57:41 +04:00
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drm_connector_unregister(connector);
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2014-03-17 16:03:56 +04:00
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drm_connector_cleanup(connector);
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}
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static struct drm_connector_funcs exynos_dpi_connector_funcs = {
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.dpms = drm_helper_connector_dpms,
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.detect = exynos_dpi_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = exynos_dpi_connector_destroy,
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};
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static int exynos_dpi_get_modes(struct drm_connector *connector)
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{
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struct exynos_dpi *ctx = connector_to_dpi(connector);
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/* fimd timings gets precedence over panel modes */
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if (ctx->vm) {
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struct drm_display_mode *mode;
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mode = drm_mode_create(connector->dev);
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if (!mode) {
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DRM_ERROR("failed to create a new display mode\n");
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return 0;
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}
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drm_display_mode_from_videomode(ctx->vm, mode);
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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if (ctx->panel)
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return ctx->panel->funcs->get_modes(ctx->panel);
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return 0;
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}
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static struct drm_encoder *
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exynos_dpi_best_encoder(struct drm_connector *connector)
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{
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struct exynos_dpi *ctx = connector_to_dpi(connector);
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return ctx->encoder;
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}
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static struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
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.get_modes = exynos_dpi_get_modes,
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.best_encoder = exynos_dpi_best_encoder,
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};
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static int exynos_dpi_create_connector(struct exynos_drm_display *display,
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struct drm_encoder *encoder)
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{
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struct exynos_dpi *ctx = display->ctx;
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struct drm_connector *connector = &ctx->connector;
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int ret;
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ctx->encoder = encoder;
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2014-04-01 14:45:28 +04:00
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connector->polled = DRM_CONNECTOR_POLL_HPD;
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2014-03-17 16:03:56 +04:00
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ret = drm_connector_init(encoder->dev, connector,
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&exynos_dpi_connector_funcs,
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DRM_MODE_CONNECTOR_VGA);
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if (ret) {
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DRM_ERROR("failed to initialize connector with drm\n");
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return ret;
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}
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drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
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2014-05-29 19:57:41 +04:00
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drm_connector_register(connector);
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2014-03-17 16:03:56 +04:00
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drm_mode_connector_attach_encoder(connector, encoder);
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return 0;
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}
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static void exynos_dpi_poweron(struct exynos_dpi *ctx)
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{
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2014-07-31 21:42:05 +04:00
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if (ctx->panel) {
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drm_panel_prepare(ctx->panel);
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2014-03-17 16:03:56 +04:00
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drm_panel_enable(ctx->panel);
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2014-07-31 21:42:05 +04:00
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}
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2014-03-17 16:03:56 +04:00
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}
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static void exynos_dpi_poweroff(struct exynos_dpi *ctx)
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{
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2014-07-31 21:42:05 +04:00
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if (ctx->panel) {
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2014-03-17 16:03:56 +04:00
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drm_panel_disable(ctx->panel);
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2014-07-31 21:42:05 +04:00
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drm_panel_unprepare(ctx->panel);
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}
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2014-03-17 16:03:56 +04:00
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}
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static void exynos_dpi_dpms(struct exynos_drm_display *display, int mode)
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{
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struct exynos_dpi *ctx = display->ctx;
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switch (mode) {
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case DRM_MODE_DPMS_ON:
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if (ctx->dpms_mode != DRM_MODE_DPMS_ON)
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exynos_dpi_poweron(ctx);
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break;
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case DRM_MODE_DPMS_STANDBY:
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case DRM_MODE_DPMS_SUSPEND:
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case DRM_MODE_DPMS_OFF:
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if (ctx->dpms_mode == DRM_MODE_DPMS_ON)
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exynos_dpi_poweroff(ctx);
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break;
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default:
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break;
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2014-06-09 17:21:08 +04:00
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}
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2014-03-17 16:03:56 +04:00
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ctx->dpms_mode = mode;
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}
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static struct exynos_drm_display_ops exynos_dpi_display_ops = {
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.create_connector = exynos_dpi_create_connector,
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.dpms = exynos_dpi_dpms
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};
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static struct exynos_drm_display exynos_dpi_display = {
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.type = EXYNOS_DISPLAY_TYPE_LCD,
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.ops = &exynos_dpi_display_ops,
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};
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/* of_* functions will be removed after merge of of_graph patches */
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static struct device_node *
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of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg)
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{
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struct device_node *np;
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for_each_child_of_node(parent, np) {
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u32 r;
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if (!np->name || of_node_cmp(np->name, name))
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continue;
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if (of_property_read_u32(np, "reg", &r) < 0)
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r = 0;
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if (reg == r)
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break;
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}
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return np;
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}
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static struct device_node *of_graph_get_port_by_reg(struct device_node *parent,
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u32 reg)
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{
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struct device_node *ports, *port;
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ports = of_get_child_by_name(parent, "ports");
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if (ports)
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parent = ports;
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port = of_get_child_by_name_reg(parent, "port", reg);
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of_node_put(ports);
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return port;
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}
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static struct device_node *
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of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg)
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{
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return of_get_child_by_name_reg(port, "endpoint", reg);
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}
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static struct device_node *
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of_graph_get_remote_port_parent(const struct device_node *node)
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{
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struct device_node *np;
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unsigned int depth;
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np = of_parse_phandle(node, "remote-endpoint", 0);
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/* Walk 3 levels up only if there is 'ports' node. */
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for (depth = 3; depth && np; depth--) {
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np = of_get_next_parent(np);
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if (depth == 2 && of_node_cmp(np->name, "ports"))
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break;
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}
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return np;
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}
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enum {
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FIMD_PORT_IN0,
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FIMD_PORT_IN1,
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FIMD_PORT_IN2,
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FIMD_PORT_RGB,
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FIMD_PORT_WRB,
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};
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2014-05-22 09:02:54 +04:00
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static struct device_node *exynos_dpi_of_find_panel_node(struct device *dev)
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2014-03-17 16:03:56 +04:00
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{
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struct device_node *np, *ep;
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np = of_graph_get_port_by_reg(dev->of_node, FIMD_PORT_RGB);
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if (!np)
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return NULL;
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ep = of_graph_get_endpoint_by_reg(np, 0);
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of_node_put(np);
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if (!ep)
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return NULL;
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np = of_graph_get_remote_port_parent(ep);
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of_node_put(ep);
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return np;
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}
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static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
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{
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struct device *dev = ctx->dev;
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struct device_node *dn = dev->of_node;
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struct device_node *np;
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ctx->panel_node = exynos_dpi_of_find_panel_node(dev);
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np = of_get_child_by_name(dn, "display-timings");
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if (np) {
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struct videomode *vm;
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int ret;
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of_node_put(np);
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vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
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if (!vm)
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return -ENOMEM;
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ret = of_get_videomode(dn, vm, 0);
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2014-04-03 18:26:00 +04:00
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if (ret < 0) {
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devm_kfree(dev, vm);
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2014-03-17 16:03:56 +04:00
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return ret;
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2014-04-03 18:26:00 +04:00
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}
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2014-03-17 16:03:56 +04:00
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ctx->vm = vm;
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return 0;
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}
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if (!ctx->panel_node)
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return -EINVAL;
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return 0;
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}
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2014-04-03 18:26:00 +04:00
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struct exynos_drm_display *exynos_dpi_probe(struct device *dev)
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2014-03-17 16:03:56 +04:00
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{
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struct exynos_dpi *ctx;
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int ret;
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2014-05-29 13:28:02 +04:00
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ret = exynos_drm_component_add(dev,
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EXYNOS_DEVICE_TYPE_CONNECTOR,
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exynos_dpi_display.type);
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if (ret)
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return ERR_PTR(ret);
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2014-03-17 16:03:56 +04:00
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ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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2014-05-29 13:28:02 +04:00
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goto err_del_component;
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2014-03-17 16:03:56 +04:00
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ctx->dev = dev;
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exynos_dpi_display.ctx = ctx;
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ctx->dpms_mode = DRM_MODE_DPMS_OFF;
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ret = exynos_dpi_parse_dt(ctx);
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2014-04-03 18:26:00 +04:00
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if (ret < 0) {
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devm_kfree(dev, ctx);
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2014-05-29 13:28:02 +04:00
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goto err_del_component;
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2014-04-03 18:26:00 +04:00
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}
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if (ctx->panel_node) {
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ctx->panel = of_drm_find_panel(ctx->panel_node);
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2014-05-29 13:28:02 +04:00
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if (!ctx->panel) {
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exynos_drm_component_del(dev,
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EXYNOS_DEVICE_TYPE_CONNECTOR);
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2014-04-03 18:26:00 +04:00
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return ERR_PTR(-EPROBE_DEFER);
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2014-05-29 13:28:02 +04:00
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}
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2014-04-03 18:26:00 +04:00
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}
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2014-03-17 16:03:56 +04:00
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2014-04-03 18:26:00 +04:00
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return &exynos_dpi_display;
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2014-05-29 13:28:02 +04:00
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err_del_component:
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exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
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return NULL;
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2014-03-17 16:03:56 +04:00
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}
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2014-04-03 18:26:00 +04:00
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int exynos_dpi_remove(struct device *dev)
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2014-03-17 16:03:56 +04:00
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{
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2014-05-09 09:25:20 +04:00
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struct drm_encoder *encoder = exynos_dpi_display.encoder;
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struct exynos_dpi *ctx = exynos_dpi_display.ctx;
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2014-03-17 16:03:56 +04:00
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exynos_dpi_dpms(&exynos_dpi_display, DRM_MODE_DPMS_OFF);
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2014-05-09 09:25:20 +04:00
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encoder->funcs->destroy(encoder);
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drm_connector_cleanup(&ctx->connector);
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2014-03-17 16:03:56 +04:00
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2014-05-29 13:28:02 +04:00
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exynos_drm_component_del(dev, EXYNOS_DEVICE_TYPE_CONNECTOR);
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2014-03-17 16:03:56 +04:00
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return 0;
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}
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