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#include <cstring>
#include <stdexcept>
#include <sys/mman.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <fcntl.h>
#include <unistd.h>
#include <drm_fourcc.h>
#include <drm.h>
#include <drm_mode.h>
#include <drm/omap_drm.h>
#include <kms++/kms++.h>
#include <kms++/omap/omapkms++.h>
using namespace std;
namespace kms
{
OmapFramebuffer::OmapFramebuffer(OmapCard& card, uint32_t width, uint32_t height, const string& fourcc)
: OmapFramebuffer(card, width, height, FourCCToPixelFormat(fourcc))
{
}
OmapFramebuffer::OmapFramebuffer(OmapCard& card, uint32_t width, uint32_t height, PixelFormat format)
: MappedFramebuffer(card, width, height), m_format(format)
{
Create();
}
OmapFramebuffer::~OmapFramebuffer()
{
Destroy();
}
void OmapFramebuffer::Create()
{
const PixelFormatInfo& format_info = get_pixel_format_info(m_format);
m_num_planes = format_info.num_planes;
for (int i = 0; i < format_info.num_planes; ++i) {
const PixelFormatPlaneInfo& pi = format_info.planes[i];
FramebufferPlane& plane = m_planes[i];
uint32_t stride = (width() * pi.bitspp + 7) / 8;
uint32_t size = stride * height();
struct drm_omap_gem_new creq = {
.size = { .bytes = size },
.flags = OMAP_BO_SCANOUT | OMAP_BO_WC,
};
int r = drmIoctl(card().fd(), DRM_IOCTL_OMAP_GEM_NEW, &creq);
if (r)
throw invalid_argument(string("DRM_IOCTL_OMAP_GEM_NEW failed: ") + strerror(errno));
plane.handle = creq.handle;
plane.stride = stride;
plane.size = size;
plane.offset = 0;
plane.map = 0;
plane.prime_fd = -1;
}
/* create framebuffer object for the dumb-buffer */
uint32_t bo_handles[4] = { m_planes[0].handle, m_planes[1].handle };
uint32_t pitches[4] = { m_planes[0].stride, m_planes[1].stride };
uint32_t offsets[4] = { m_planes[0].offset, m_planes[1].offset };
uint32_t id;
int r = drmModeAddFB2(card().fd(), width(), height(), (uint32_t)format(),
bo_handles, pitches, offsets, &id, 0);
if (r)
throw invalid_argument(string("drmModeAddFB2 failed: ") + strerror(errno));
set_id(id);
}
void OmapFramebuffer::Destroy()
{
drmModeRmFB(card().fd(), id());
for (uint i = 0; i < m_num_planes; ++i) {
FramebufferPlane& plane = m_planes[i];
/* unmap buffer */
if (plane.map)
munmap(plane.map, plane.size);
struct drm_gem_close dreq = { .handle = plane.handle };
drmIoctl(card().fd(), DRM_IOCTL_GEM_CLOSE, &dreq);
if (plane.prime_fd >= 0)
::close(plane.prime_fd);
}
}
uint8_t* OmapFramebuffer::map(unsigned plane)
{
FramebufferPlane& p = m_planes[plane];
if (p.map)
return p.map;
struct drm_omap_gem_info mreq = { .handle = p.handle };
int r = drmIoctl(card().fd(), DRM_IOCTL_OMAP_GEM_INFO, &mreq);
if (r)
throw invalid_argument(string("DRM_IOCTL_OMAP_GEM_INFO failed: ") + strerror(errno));
p.map = (uint8_t *)mmap(0, p.size, PROT_READ | PROT_WRITE, MAP_SHARED,
card().fd(), mreq.offset);
if (p.map == MAP_FAILED)
throw invalid_argument(string("mmap failed: ") + strerror(errno));
return p.map;
}
int OmapFramebuffer::prime_fd(unsigned int plane)
{
FramebufferPlane& p = m_planes[plane];
if (p.prime_fd >= 0)
return p.prime_fd;
int r = drmPrimeHandleToFD(card().fd(), p.handle, DRM_CLOEXEC | O_RDWR,
&p.prime_fd);
if (r)
throw std::runtime_error("drmPrimeHandleToFD failed");
return p.prime_fd;
}
}
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