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compositor-drm: reset KMS state on VT-switch in

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Fix a regression with VT-switching away from Weston and then back
causing drmModePageFlip() to fail with ENOSPC or EINVAL, leaving one or
more outputs not updated. The regression appeared in
47224cc9312fef05c1a523ea0da0a1aae66f100d:

	compositor-drm: Delete drm_backend_set_modes

Fix it by forcing a drmModeSetCrtc() on all outputs both initially
created and after VT-switch in.

Cc: Daniel Stone <daniels@collabora.com>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

v2: moved state_invalid=true from create_output_for_connector() to
    drm_output_enable()

Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Pekka Paalanen 2017-07-27 13:44:32 +03:00
parent f981d69553
commit 6b65d8f120
1 changed files with 17 additions and 1 deletions
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18
libweston/compositor-drm.c
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@ -220,6 +220,8 @@ struct drm_output {
enum dpms_enum dpms;
struct backlight *backlight;
bool state_invalid;
int vblank_pending;
int page_flip_pending;
int destroy_pending;
@ -880,7 +882,7 @@ drm_output_repaint(struct weston_output *output_base,
return -1;
mode = container_of(output->base.current_mode, struct drm_mode, base);
if (!output->fb_current ||
if (output->state_invalid || !output->fb_current ||
output->fb_current->stride != output->fb_pending->stride) {
ret = drmModeSetCrtc(backend->drm.fd, output->crtc_id,
output->fb_pending->fb_id, 0, 0,
@ -891,6 +893,8 @@ drm_output_repaint(struct weston_output *output_base,
goto err_pageflip;
}
output_base->set_dpms(output_base, WESTON_DPMS_ON);
output->state_invalid = false;
}
if (drmModePageFlip(backend->drm.fd, output->crtc_id,
@ -999,6 +1003,12 @@ drm_output_start_repaint_loop(struct weston_output *output_base)
goto finish_frame;
}
/* Need to smash all state in from scratch; current timings might not
* be what we want, page flip might not work, etc.
*/
if (output->state_invalid)
goto finish_frame;
/* Try to get current msc and timestamp via instant query */
vbl.request.type |= drm_waitvblank_pipe(output);
ret = drmWaitVBlank(backend->drm.fd, &vbl);
@ -2675,6 +2685,8 @@ drm_output_enable(struct weston_output *base)
output->connector->count_modes == 0 ?
", built-in" : "");
output->state_invalid = true;
return 0;
err_free:
@ -3130,6 +3142,10 @@ session_notify(struct wl_listener *listener, void *data)
weston_log("activating session\n");
weston_compositor_wake(compositor);
weston_compositor_damage_all(compositor);
wl_list_for_each(output, &compositor->output_list, base.link)
output->state_invalid = true;
udev_input_enable(&b->input);
} else {
weston_log("deactivating session\n");