diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/drmmode_display.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/drmmode_display.c b/src/drmmode_display.c index ad3325b..17efde8 100644 --- a/src/drmmode_display.c +++ b/src/drmmode_display.c @@ -2627,6 +2627,49 @@ amdgpu_mode_hotplug(ScrnInfoPtr scrn, drmmode_ptr drmmode) Bool changed = FALSE; int num_dvi = 0, num_hdmi = 0; + /* Try to re-set the mode on all the connectors with a BAD link-state: + * This may happen if a link degrades and a new modeset is necessary, using + * different link-training parameters. If the kernel found that the current + * mode is not achievable anymore, it should have pruned the mode before + * sending the hotplug event. Try to re-set the currently-set mode to keep + * the display alive, this will fail if the mode has been pruned. + * In any case, we will send randr events for the Desktop Environment to + * deal with it, if it wants to. + */ + for (i = 0; i < config->num_output; i++) { + xf86OutputPtr output = config->output[i]; + drmmode_output_private_ptr drmmode_output = output->driver_private; + uint32_t con_id = drmmode_output->mode_output->connector_id; + drmModeConnectorPtr koutput; + + /* Get an updated view of the properties for the current connector and + * look for the link-status property + */ + koutput = drmModeGetConnectorCurrent(pAMDGPUEnt->fd, con_id); + for (j = 0; koutput && j < koutput->count_props; j++) { + drmModePropertyPtr props; + props = drmModeGetProperty(pAMDGPUEnt->fd, koutput->props[j]); + if (props && props->flags & DRM_MODE_PROP_ENUM && + !strcmp(props->name, "link-status") && + koutput->prop_values[j] == DRM_MODE_LINK_STATUS_BAD) { + xf86CrtcPtr crtc = output->crtc; + if (!crtc) + continue; + + /* the connector got a link failure, re-set the current mode */ + drmmode_set_mode_major(crtc, &crtc->mode, crtc->rotation, + crtc->x, crtc->y); + + xf86DrvMsg(scrn->scrnIndex, X_WARNING, + "hotplug event: connector %u's link-state is BAD, " + "tried resetting the current mode. You may be left " + "with a black screen if this fails...\n", con_id); + } + drmModeFreeProperty(props); + } + drmModeFreeConnector(koutput); + } + mode_res = drmModeGetResources(pAMDGPUEnt->fd); if (!mode_res) goto out; |