mirror of
https://gitlab.freedesktop.org/emersion/libliftoff.git
synced 2024-09-29 05:36:51 +02:00
ceb4a1ff9e
Compositors need to drive multiple connectors, each with its own vblank timings. For each device, there's one separate rendering loop per output. It's not possible to call liftoff_device_apply each time we want to submit a new frame to one output, because this could touch another's output state, submitting a new frame there in the process. When the other output will submit a new frame, it'll get EBUSY (can't submit two frames without waiting for vblank). Closes: https://github.com/emersion/libliftoff/issues/21
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
#include <assert.h>
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#include <unistd.h>
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#include <libliftoff.h>
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#include <stdio.h>
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#include <string.h>
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#include "libdrm_mock.h"
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/* Number of page-flips before the plane allocation has stabilized */
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#define STABILIZE_PAGEFLIP_COUNT 600 /* 10s at 60FPS */
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static struct liftoff_layer *add_layer(struct liftoff_output *output,
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int x, int y, int width, int height)
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{
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uint32_t fb_id;
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struct liftoff_layer *layer;
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layer = liftoff_layer_create(output);
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fb_id = liftoff_mock_drm_create_fb(layer);
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liftoff_layer_set_property(layer, "FB_ID", fb_id);
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liftoff_layer_set_property(layer, "CRTC_X", x);
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liftoff_layer_set_property(layer, "CRTC_Y", y);
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liftoff_layer_set_property(layer, "CRTC_W", width);
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liftoff_layer_set_property(layer, "CRTC_H", height);
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liftoff_layer_set_property(layer, "SRC_X", 0);
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liftoff_layer_set_property(layer, "SRC_Y", 0);
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liftoff_layer_set_property(layer, "SRC_W", width << 16);
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liftoff_layer_set_property(layer, "SRC_H", height << 16);
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return layer;
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}
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int main(int argc, char *argv[]) {
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struct liftoff_mock_plane *mock_plane;
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int drm_fd;
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struct liftoff_device *device;
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struct liftoff_output *output;
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struct liftoff_layer *layers[2], *layer;
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uint32_t fbs[2];
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drmModeAtomicReq *req;
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bool ok;
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liftoff_log_init(LIFTOFF_SILENT, NULL);
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mock_plane = liftoff_mock_drm_create_plane(DRM_PLANE_TYPE_PRIMARY);
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/* Plane incompatible with all layers */
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liftoff_mock_drm_create_plane(DRM_PLANE_TYPE_CURSOR);
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drm_fd = liftoff_mock_drm_open();
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device = liftoff_device_create(drm_fd);
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assert(device != NULL);
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output = liftoff_output_create(device, liftoff_mock_drm_crtc_id);
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layers[0] = add_layer(output, 0, 0, 1920, 1080);
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layers[1] = add_layer(output, 0, 0, 1920, 1080);
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/* All layers are compatible with the primary plane */
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liftoff_mock_plane_add_compatible_layer(mock_plane, layers[0]);
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liftoff_mock_plane_add_compatible_layer(mock_plane, layers[1]);
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for (size_t i = 0; i < sizeof(layers) / sizeof(layers[0]); i++) {
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/* We will continuously update layers[i]. After some time we
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* want to see it get a plane. */
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layer = layers[i];
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fprintf(stderr, "Testing layer %zu\n", i);
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fbs[0] = liftoff_mock_drm_create_fb(layer);
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fbs[1] = liftoff_mock_drm_create_fb(layer);
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req = drmModeAtomicAlloc();
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for (int j = 0; j < STABILIZE_PAGEFLIP_COUNT; j++) {
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drmModeAtomicSetCursor(req, 0);
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liftoff_layer_set_property(layer, "FB_ID", fbs[j % 2]);
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ok = liftoff_output_apply(output, req);
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assert(ok);
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}
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assert(liftoff_mock_plane_get_layer(mock_plane, req) == layer);
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drmModeAtomicFree(req);
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}
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liftoff_device_destroy(device);
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close(drm_fd);
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return 0;
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}
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