164 lines
3.9 KiB
C++
164 lines
3.9 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 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 General Public License version 2.
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*/
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/* Genode includes */
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#include <framebuffer_session/framebuffer_session.h>
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#include <cap_session/connection.h>
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#include <dataspace/client.h>
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#include <base/printf.h>
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#include <base/sleep.h>
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#include <os/config.h>
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#include <os/static_root.h>
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#include <os/server.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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};
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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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size_t _width;
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size_t _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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Signal_context_capability _sync_sigh;
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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(Driver &driver, size_t width, size_t height,
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Driver::Output output)
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:
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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_session()->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_drv(width, height, _format, output, _phys_base)) {
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PERR("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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_sync_sigh = sigh;
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}
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void refresh(int, int, int, int) override
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{
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if (_sync_sigh.valid())
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Signal_transmitter(_sync_sigh).submit();
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}
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};
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struct Main
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{
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Server::Entrypoint &ep;
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Framebuffer::Driver driver;
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Main(Server::Entrypoint &ep)
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: ep(ep), driver()
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{
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using namespace Framebuffer;
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/* default config */
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size_t width = 1920;
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size_t height = 1080;
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Driver::Output output = Driver::OUTPUT_HDMI;
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/* try to read custom user config */
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try {
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char out[5] = { 0 };
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Genode::Xml_node config_node = Genode::config()->xml_node();
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config_node.attribute("width").value(&width);
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config_node.attribute("height").value(&height);
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config_node.attribute("output").value(out, sizeof(out));
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if (!Genode::strcmp(out, "LCD")) {
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output = Driver::OUTPUT_LCD;
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}
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}
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catch (...) {
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PDBG("using default configuration: HDMI@%dx%d", width, height);
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}
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/* let entrypoint serve the framebuffer session and root interfaces */
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static Session_component fb_session(driver, width, height, output);
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static Static_root<Framebuffer::Session> fb_root(ep.manage(fb_session));
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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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/************
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** Server **
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************/
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namespace Server {
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char const *name() { return "fb_drv_ep"; }
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size_t stack_size() { return 1024*sizeof(long); }
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void construct(Entrypoint &ep) { static Main server(ep); }
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}
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