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/* SPDX-License-Identifier: MIT */
#include "drm++/mode/mode.hpp"
#include "drm++/helper/ioctl.hpp"
#include "drm++/helper/types.hpp"
#include <cstring>
#include <string>
#include <utility>
#include <vector>
#include <drm.h>
#include <drm_mode.h>
using namespace drm;
using namespace drm::mode;
Resources::Resources(int fd, bool fetchModes) : m_fd(fd) {
drm_mode_card_res card_args{
.count_crtcs = 0,
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETRESOURCES, card_args);
std::vector<u32> crtc_ids(card_args.count_crtcs);
std::vector<u32> connector_ids(card_args.count_connectors);
card_args = {
.crtc_id_ptr = reinterpret_cast<u64>(crtc_ids.data()),
.connector_id_ptr = reinterpret_cast<u64>(connector_ids.data()),
.count_crtcs = static_cast<u32>(crtc_ids.size()),
.count_connectors = static_cast<u32>(connector_ids.size())
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETRESOURCES, card_args);
this->m_crtcs.reserve(card_args.count_crtcs);
for (const u32 crtc_id : crtc_ids) {
drm_mode_crtc args{
.crtc_id = static_cast<u32>(crtc_id),
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETCRTC, args);
this->m_crtcs.push_back({
.id = static_cast<u32>(args.crtc_id),
});
}
this->m_connectors.reserve(card_args.count_connectors);
for (const u32 connector_id : connector_ids) {
drm_mode_get_connector args{
.count_modes = fetchModes ? 0U : 1U,
.connector_id = static_cast<u32>(connector_id),
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETCONNECTOR, args);
std::vector<drm_mode_modeinfo> modes_raw(args.count_modes);
args = {
.modes_ptr = reinterpret_cast<u64>(modes_raw.data()),
.count_modes = static_cast<u32>(modes_raw.size()),
.connector_id = static_cast<u32>(connector_id),
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETCONNECTOR, args);
std::vector<ModeInfo> modes;
modes.reserve(modes_raw.size());
for (const auto& mode_raw : modes_raw) {
modes.push_back({
.resolution = { mode_raw.hdisplay, mode_raw.vdisplay },
.refreshRate = (mode_raw.clock * 1000.0) / (mode_raw.htotal * mode_raw.vtotal),
.preferred = (mode_raw.type & DRM_MODE_TYPE_PREFERRED) != 0,
.raw = {0},
});
std::memcpy(modes.back().raw, &mode_raw, sizeof(mode_raw)); // NOLINT (raw memory)
}
this->m_connectors.push_back({
.id = static_cast<u32>(args.connector_id),
.type = static_cast<ConnectorType>(args.connector_type),
.typeIndex = static_cast<u32>(args.connector_type_id),
.modes = std::move(modes),
.physicalSize = { args.mm_width, args.mm_height },
});
}
// Fetch planes
drm_mode_get_plane_res plane_args{
.count_planes = 0,
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETPLANERESOURCES, plane_args);
std::vector<u32> plane_ids(plane_args.count_planes);
plane_args.plane_id_ptr = reinterpret_cast<u64>(plane_ids.data());
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETPLANERESOURCES, plane_args);
this->m_planes.reserve(plane_args.count_planes);
for (const u32 plane_id : plane_ids) {
drm_mode_get_plane args{
.plane_id = static_cast<u32>(plane_id),
};
ioctl::perform(this->m_fd, DRM_IOCTL_MODE_GETPLANE, args);
std::vector<u32> possible_crtcs;
for (u32 i = 0; i < this->m_crtcs.size(); ++i) {
if (!(args.possible_crtcs & (1 << i)))
continue;
possible_crtcs.push_back(this->m_crtcs.at(i).id);
}
this->m_planes.push_back({
.id = static_cast<u32>(args.plane_id),
.crtcs = std::vector<u32>(possible_crtcs),
});
}
}
/* Enums */
std::string mode::connectorTypeToString(ConnectorType type) {
switch (type) {
case ConnectorType::Unknown: return "Unknown";
case ConnectorType::VGA: return "VGA";
case ConnectorType::DVII: return "DVI-I";
case ConnectorType::DVID: return "DVI-D";
case ConnectorType::DVIA: return "DVI-A";
case ConnectorType::Composite: return "Composite";
case ConnectorType::SVIDEO: return "SVIDEO";
case ConnectorType::LVDS: return "LVDS";
case ConnectorType::Component: return "Component";
case ConnectorType::NPinDIN: return "DIN";
case ConnectorType::DisplayPort: return "DP";
case ConnectorType::HDMI_A: return "HDMI-A";
case ConnectorType::HDMI_B: return "HDMI-B";
case ConnectorType::TV: return "TV";
case ConnectorType::eDP: return "eDP";
case ConnectorType::Virtual: return "Virtual";
case ConnectorType::DSI: return "DSI";
case ConnectorType::DPI: return "DPI";
case ConnectorType::Writeback: return "Writeback";
case ConnectorType::SPI: return "SPI";
case ConnectorType::USB: return "USB";
}
}
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