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backend: add preliminary support for driver detection

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Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
This commit is contained in:
Yuxuan Shui
2019-04-20 00:21:38 +01:00
parent a2d0d5c826
commit 685a583f84
7 changed files with 132 additions and 1 deletions
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62
src/backend/driver.c Normal file
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// SPDX-License-Identifier: MPL-2.0
// Copyright (c) Yuxuan Shui <yshuiv7@gmail.com>
#include <xcb/randr.h>
#include <xcb/xcb.h>
#include "backend/backend.h"
#include "backend/driver.h"
#include "common.h"
enum driver detect_driver(xcb_connection_t *c, backend_t *backend_data, xcb_window_t window) {
enum driver ret = 0;
// First we try doing backend agnostic detection using RANDR
// There's no way to query the X server about what driver is loaded, so RANDR is
// our best shot.
auto randr_version = xcb_randr_query_version_reply(
c, xcb_randr_query_version(c, XCB_RANDR_MAJOR_VERSION, XCB_RANDR_MINOR_VERSION),
NULL);
if (randr_version &&
(randr_version->major_version > 1 || randr_version->minor_version >= 4)) {
auto r = xcb_randr_get_providers_reply(
c, xcb_randr_get_providers(c, window), NULL);
if (r == NULL) {
log_warn("Failed to get RANDR providers");
return 0;
}
auto providers = xcb_randr_get_providers_providers(r);
for (auto i = 0; i < xcb_randr_get_providers_providers_length(r); i++) {
auto r2 = xcb_randr_get_provider_info_reply(
c, xcb_randr_get_provider_info(c, providers[i], r->timestamp), NULL);
if (r2 == NULL) {
continue;
}
if (r2->num_outputs == 0) {
free(r2);
continue;
}
auto name = xcb_randr_get_provider_info_name(r2);
if (strcasestr(name, "modesetting") != NULL) {
ret |= DRIVER_MODESETTING;
} else if (strcasestr(name, "Radeon") != NULL) {
// Be conservative, add both radeon drivers
ret |= DRIVER_AMDGPU | DRIVER_RADEON;
} else if (strcasestr(name, "NVIDIA") != NULL) {
ret |= DRIVER_NVIDIA;
} else if (strcasestr(name, "nouveau") != NULL) {
ret |= DRIVER_NOUVEAU;
} else if (strcasestr(name, "Intel") != NULL) {
ret |= DRIVER_INTEL;
}
}
free(r);
}
// If the backend supports driver detection, use that as well
if (backend_data && backend_data->ops->detect_driver) {
ret |= backend_data->ops->detect_driver(backend_data);
}
return ret;
}