148 lines
3.5 KiB
C++
148 lines
3.5 KiB
C++
/*
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* \brief Framebuffer driver for Exynos5 HDMI
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* \author Martin Stein
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* \date 2013-08-09
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*/
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/*
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* Copyright (C) 2013-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/attached_rom_dataspace.h>
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#include <base/component.h>
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#include <framebuffer_session/framebuffer_session.h>
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#include <timer_session/connection.h>
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#include <dataspace/client.h>
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#include <base/log.h>
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#include <os/static_root.h>
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#include <util/string.h>
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/* local includes */
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#include <driver.h>
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namespace Framebuffer
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{
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using namespace Genode;
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/**
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* Framebuffer session backend
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*/
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class Session_component;
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struct Main;
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};
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class Framebuffer::Session_component
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:
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public Genode::Rpc_object<Framebuffer::Session>
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{
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private:
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Genode::Env &_env;
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unsigned _width;
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unsigned _height;
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Driver::Format _format;
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size_t _size;
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Dataspace_capability _ds;
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addr_t _phys_base;
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Timer::Connection _timer { _env };
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/**
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* Convert Driver::Format to Framebuffer::Mode::Format
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*/
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static Mode::Format _convert_format(Driver::Format driver_format)
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{
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switch (driver_format) {
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case Driver::FORMAT_RGB565: return Mode::RGB565;
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}
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return Mode::INVALID;
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}
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public:
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/**
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* Constructor
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*
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* \param driver driver backend that communicates with hardware
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* \param width width of framebuffer in pixel
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* \param height height of framebuffer in pixel
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* \param output targeted output device
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*/
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Session_component(Genode::Env &env, Driver &driver,
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unsigned width, unsigned height)
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:
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_env(env),
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_width(width),
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_height(height),
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_format(Driver::FORMAT_RGB565),
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_size(driver.buffer_size(width, height, _format)),
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_ds(_env.ram().alloc(_size, WRITE_COMBINED)),
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_phys_base(Dataspace_client(_ds).phys_addr())
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{
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if (driver.init(width, height, _format, _phys_base)) {
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error("could not initialize display");
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struct Could_not_initialize_display : Exception { };
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throw Could_not_initialize_display();
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}
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}
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/************************************
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** Framebuffer::Session interface **
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************************************/
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Dataspace_capability dataspace() override { return _ds; }
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Mode mode() const override
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{
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return Mode(_width, _height, _convert_format(_format));
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}
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void mode_sigh(Genode::Signal_context_capability) override { }
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void sync_sigh(Genode::Signal_context_capability sigh) override
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{
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_timer.sigh(sigh);
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_timer.trigger_periodic(10*1000);
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}
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void refresh(int, int, int, int) override { }
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};
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static unsigned config_dimension(Genode::Xml_node node, char const *attr,
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unsigned default_value)
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{
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return node.attribute_value(attr, default_value);
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}
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struct Main
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{
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Genode::Env &_env;
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Genode::Entrypoint &_ep;
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Genode::Attached_rom_dataspace _config { _env, "config" };
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Framebuffer::Driver _driver { _env };
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Framebuffer::Session_component _fb_session { _env, _driver,
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config_dimension(_config.xml(), "width", 1920),
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config_dimension(_config.xml(), "height", 1080)
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};
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Genode::Static_root<Framebuffer::Session> _fb_root { _ep.manage(_fb_session) };
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Main(Genode::Env &env) : _env(env), _ep(_env.ep())
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{
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/* announce service and relax */
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_env.parent().announce(_ep.manage(_fb_root));
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}
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};
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void Component::construct(Genode::Env &env) { static Main main(env); }
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