132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
/*
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* \brief Frame-buffer driver for the i.MX53
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* \author Nikolay Golikov <nik@ksyslabs.org>
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* \author Stefan Kalkowski <stefan.kalkowski@genode-labs.com>
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* \date 2012-06-21
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*/
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/* Genode includes */
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#include <imx_framebuffer_session/imx_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/static_root.h>
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#include <os/config.h>
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#include <blit/blit.h>
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/* local includes */
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#include <driver.h>
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namespace Framebuffer {
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using namespace Genode;
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class Session_component;
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};
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class Framebuffer::Session_component :
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public Genode::Rpc_object<Framebuffer::Imx_session>
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{
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private:
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bool _buffered;
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Mode _mode;
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size_t _size;
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/* dataspace uses a back buffer (if '_buffered' is true) */
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Genode::Dataspace_capability _bb_ds;
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void *_bb_addr;
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/* dataspace of physical frame buffer */
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Genode::Dataspace_capability _fb_ds;
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void *_fb_addr;
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Ipu &_ipu;
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public:
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Session_component(Driver &driver, bool buffered)
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: _buffered(buffered),
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_mode(driver.mode()),
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_size(_mode.bytes_per_pixel() * _mode.width() * _mode.height()),
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_bb_ds(buffered ? Genode::env()->ram_session()->alloc(_size)
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: Genode::Ram_dataspace_capability()),
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_bb_addr(buffered ? (void*)Genode::env()->rm_session()->attach(_bb_ds) : 0),
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_fb_ds(Genode::env()->ram_session()->alloc(_size, false)),
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_fb_addr((void*)Genode::env()->rm_session()->attach(_fb_ds)),
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_ipu(driver.ipu())
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{
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if (!driver.init(Dataspace_client(_fb_ds).phys_addr())) {
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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() { return _buffered ? _bb_ds : _fb_ds; }
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Mode mode() const { return _mode; }
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void mode_sigh(Genode::Signal_context_capability) { }
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void refresh(int x, int y, int w, int h)
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{
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if (!_buffered) return;
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/* clip specified coordinates against screen boundaries */
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int x2 = min(x + w - 1, (int)_mode.width() - 1),
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y2 = min(y + h - 1, (int)_mode.height() - 1);
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int x1 = max(x, 0),
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y1 = max(y, 0);
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if (x1 > x2 || y1 > y2) return;
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int bypp = _mode.bytes_per_pixel();
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/* copy pixels from back buffer to physical frame buffer */
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char *src = (char *)_bb_addr + bypp*(_mode.width()*y + x),
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*dst = (char *)_fb_addr + bypp*(_mode.width()*y + x);
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blit(src, bypp*_mode.width(), dst, bypp*_mode.width(),
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bypp*(x2 - x1 + 1), y2 - y1 + 1);
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}
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void overlay(Genode::addr_t phys_base, int x, int y, int alpha) {
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_ipu.overlay(phys_base, x, y, alpha); }
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};
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static bool config_attribute(const char *attr_name)
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{
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bool result = false;
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try {
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result =
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Genode::config()->xml_node().attribute(attr_name).has_value("yes"); }
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catch (...) {}
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return result;
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}
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int main(int, char **)
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{
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Genode::printf("Starting i.MX53 framebuffer driver\n");
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using namespace Framebuffer;
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static Driver driver;
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enum { STACK_SIZE = 4096 };
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static Cap_connection cap;
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static Rpc_entrypoint ep(&cap, STACK_SIZE, "fb_ep");
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static Session_component fb_session(driver, config_attribute("buffered"));
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static Static_root<Framebuffer::Session> fb_root(ep.manage(&fb_session));
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env()->parent()->announce(ep.manage(&fb_root));
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sleep_forever();
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return 0;
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}
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