Attachment 126797 Details for Bug 97940 – test program to list all connectors

test program to list all connectors

drm-getconnector.c (text/x-csrc), 2.13 KB, created by Daniel Lichtenberger on 2016-09-26 19:45:45 UTC

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Creator: Daniel Lichtenberger

Created: 2016-09-26 19:45:45 UTC

Size: 2.13 KB

patch

obsolete

>// based on http://betteros.org/tut/graphics1.php
>
>#include <sys/ioctl.h>
>#include <stdio.h>
>#include <stdint.h>
>#include <fcntl.h>
>#include <sys/mman.h>
>#include <sys/ioctl.h>
>
>#include <libdrm/drm.h>
>#include <libdrm/drm_mode.h>
>
>void test()
>{
>    int dri_fd = open("/dev/dri/card0", O_RDWR);
>
>    printf("dri_fd=%d\n", dri_fd);
>
>    ioctl(dri_fd, DRM_IOCTL_SET_MASTER, 0);
>
>    struct drm_mode_card_res res = {0};
>    uint64_t res_fb_buf[10] = {0},
>             res_crtc_buf[10] = {0},
>             res_conn_buf[10] = {0},
>             res_enc_buf[10] = {0};
>
>    ioctl(dri_fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
>    res.fb_id_ptr = (uint64_t) res_fb_buf;
>    res.crtc_id_ptr = (int64_t) res_crtc_buf;
>    res.connector_id_ptr = (uint64_t) res_conn_buf;
>    res.encoder_id_ptr = (uint64_t) res_enc_buf;
>
>    ioctl(dri_fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
>
>    printf("fb: %d, crtc: %d, conn: %d, enc: %d\n",res.count_fbs,res.count_crtcs,res.count_connectors,res.count_encoders);
>
>
>    void *fb_base[10];
>    long fb_w[10];
>    long fb_h[10];
>    for (int i = 0; i < res.count_connectors; i++) {
>        printf("#%i ", i);
>        
>        struct drm_mode_modeinfo conn_mode_buf[20] = {0};
>        uint64_t conn_prop_buf[20] = {0},
>                 conn_propval_buf[20] = {0},
>                 conn_enc_buf[20] = {0};
>        struct drm_mode_get_connector conn = {0};
>
>        conn.connector_id = res_conn_buf[i];
>
>        fflush(stdout);
>
>        // on my system, the ~1 second freeze occurs here for i=0
>
>        ioctl(dri_fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn);
>        conn.modes_ptr = (uint64_t) conn_mode_buf;
>        conn.props_ptr = (uint64_t) conn_prop_buf;
>        conn.prop_values_ptr = (uint64_t) conn_enc_buf;
>        ioctl(dri_fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn);
>
>        if (conn.count_encoders < 1 || conn.count_modes < 1 || !conn.encoder_id || !conn.connection)
>        {
>            printf("Not connected\n");
>            continue;
>		}
>
>        printf("%dx%d\n", conn_mode_buf[0].hdisplay, conn_mode_buf[0].vdisplay);
>    }
>
>    ioctl(dri_fd, DRM_IOCTL_DROP_MASTER, 0);
>}
>
>int main(int argc, char** argv) 
>{
>    while (1) {
>        test();
>    }
>}
>

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Attachments on bug 97940: 126797 | 126977 | 126980

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