[PATCH weston v9 31/62] compositor-drm: Move repaint state application to flush
Daniel Stone
daniels at collabora.com
Fri Mar 3 23:05:42 UTC 2017
Split repaint into two stages, as implied by the grouped-repaint
interface: drm_output_repaint generates the repaint state only, and
drm_repaint_flush applies it.
This also moves DPMS into output state. Previously, the usual way to
DPMS off was that repaint would be called and apply its state, followed
by set_dpms being called afterwards to push the DPMS state separately.
As this happens before the repaint_flush hook, with no change to DPMS we
would set DPMS off, then immediately re-enable the output by posting the
repaint. Not ideal.
Moving DPMS application at the same time complicates this patch, but I
couldn't find a way to split it; if we keep set_dpms before begin_flush
then we break DPMS off, or if we try to move DPMS to output state before
using the repaint flush, we get stuck as the repaint hook generates an
asynchronous state update, followed immediately by set_dpms generating a
synchronous state update.
Differential Revision: https://phabricator.freedesktop.org/D1500
Signed-off-by: Daniel Stone <daniels at collabora.com>
---
libweston/compositor-drm.c | 293 ++++++++++++++++++++++++++++++++++-----------
1 file changed, 226 insertions(+), 67 deletions(-)
v9: New. See changelog in atomic modesetting patch.
As the commit message says, I tried my hardest (actually multiple
days ... !) to get these patches separate, in a few different
permutations. But I couldn't find a way which worked properly.
diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index 92ed199..c78ad72 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -279,6 +279,7 @@ struct drm_output_state {
struct drm_pending_state *pending_state;
struct drm_output *output;
struct wl_list link;
+ enum dpms_enum dpms;
struct wl_list plane_list;
};
@@ -356,6 +357,7 @@ struct drm_output {
int page_flip_pending;
int destroy_pending;
int disable_pending;
+ int dpms_off_pending;
struct drm_fb *gbm_cursor_fb[2];
struct drm_plane *cursor_plane;
@@ -1137,6 +1139,7 @@ drm_output_state_alloc(struct drm_output *output,
assert(state);
state->output = output;
+ state->dpms = WESTON_DPMS_OFF;
state->pending_state = pending_state;
if (pending_state)
wl_list_insert(&pending_state->output_list, &state->link);
@@ -1209,6 +1212,30 @@ drm_output_state_free(struct drm_output_state *state)
}
/**
+ * Get output state to disable output
+ *
+ * Returns a pointer to an output_state object which can be used to disable
+ * an output (e.g. DPMS off).
+ *
+ * @param pending_state The pending state object owning this update
+ * @param output The output to disable
+ * @returns A drm_output_state to disable the output
+ */
+static struct drm_output_state *
+drm_output_get_disable_state(struct drm_pending_state *pending_state,
+ struct drm_output *output)
+{
+ struct drm_output_state *output_state;
+
+ output_state = drm_output_state_duplicate(output->state_cur,
+ pending_state,
+ DRM_OUTPUT_STATE_CLEAR_PLANES);
+ output_state->dpms = WESTON_DPMS_OFF;
+
+ return output_state;
+}
+
+/**
* Allocate a new drm_pending_state
*
* Allocate a new, empty, 'pending state' structure to be used across a
@@ -1269,6 +1296,8 @@ drm_pending_state_get_output(struct drm_pending_state *pending_state,
return NULL;
}
+static int drm_pending_state_apply(struct drm_pending_state *state);
+
/**
* Mark a drm_output_state (the output's last state) as complete. This handles
* any post-completion actions such as updating the repaint timer, disabling the
@@ -1278,6 +1307,7 @@ static void
drm_output_update_complete(struct drm_output *output, uint32_t flags,
unsigned int sec, unsigned int usec)
{
+ struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_plane_state *ps;
struct timespec ts;
@@ -1293,6 +1323,10 @@ drm_output_update_complete(struct drm_output *output, uint32_t flags,
} else if (output->disable_pending) {
weston_output_disable(&output->base);
goto out;
+ } else if (output->dpms_off_pending) {
+ struct drm_pending_state *pending = drm_pending_state_alloc(b);
+ drm_output_get_disable_state(pending, output);
+ drm_pending_state_apply(pending);
}
ts.tv_sec = sec;
@@ -1307,6 +1341,7 @@ drm_output_update_complete(struct drm_output *output, uint32_t flags,
out:
output->destroy_pending = 0;
output->disable_pending = 0;
+ output->dpms_off_pending = 0;
}
/**
@@ -1354,7 +1389,6 @@ drm_output_assign_state(struct drm_output_state *state,
}
}
-
static int
drm_view_transform_supported(struct weston_view *ev)
{
@@ -1638,41 +1672,60 @@ drm_waitvblank_pipe(struct drm_output *output)
}
static int
-drm_output_repaint(struct weston_output *output_base,
- pixman_region32_t *damage,
- void *repaint_data)
+drm_output_apply_state(struct drm_output_state *state)
{
- struct drm_pending_state *pending_state = repaint_data;
- struct drm_output_state *state;
- struct drm_output *output = to_drm_output(output_base);
- struct drm_backend *backend =
- to_drm_backend(output->base.compositor);
+ struct drm_output *output = state->output;
+ struct drm_backend *backend = to_drm_backend(output->base.compositor);
struct drm_plane *scanout_plane = output->scanout_plane;
+ struct drm_property_info *dpms_prop =
+ &backend->props_conn[WDRM_CONNECTOR_DPMS];
struct drm_plane_state *scanout_state;
struct drm_plane_state *ps;
struct drm_plane *p;
struct drm_mode *mode;
+ struct timespec now;
int ret = 0;
- if (output->disable_pending || output->destroy_pending)
- goto err;
+ if (state->dpms != WESTON_DPMS_ON) {
+ wl_list_for_each(ps, &state->plane_list, link) {
+ p = ps->plane;
+ assert(ps->fb == NULL);
+ assert(ps->output == NULL);
- assert(!output->state_last);
+ if (p->type != WDRM_PLANE_TYPE_OVERLAY)
+ continue;
- /* If planes have been disabled in the core, we might not have
- * hit assign_planes at all, so might not have valid output state
- * here. */
- state = drm_pending_state_get_output(pending_state, output);
- if (!state)
- state = drm_output_state_duplicate(output->state_cur,
- pending_state,
- DRM_OUTPUT_STATE_CLEAR_PLANES);
+ ret = drmModeSetPlane(backend->drm.fd, p->plane_id,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+ if (ret)
+ weston_log("drmModeSetPlane failed disable: %m\n");
+ }
- drm_output_render(state, damage);
- scanout_state = drm_output_state_get_plane(state, scanout_plane);
- if (!scanout_state || !scanout_state->fb)
- goto err;
+ if (output->cursor_plane) {
+ ret = drmModeSetCursor(backend->drm.fd, output->crtc_id,
+ 0, 0, 0);
+ if (ret)
+ weston_log("drmModeSetCursor failed disable: %m\n");
+ }
+
+ ret = drmModeSetCrtc(backend->drm.fd, output->crtc_id, 0, 0, 0,
+ &output->connector_id, 0, NULL);
+ if (ret)
+ weston_log("drmModeSetCrtc failed disabling: %m\n");
+
+ drm_output_assign_state(state,
+ DRM_OUTPUT_STATE_UPDATE_SYNCHRONOUS);
+ weston_compositor_read_presentation_clock(output->base.compositor, &now);
+ weston_output_finish_frame(&output->base,
+ &now,
+ WP_PRESENTATION_FEEDBACK_KIND_HW_COMPLETION);
+
+ return 0;
+ }
+
+ scanout_state =
+ drm_output_state_get_existing_plane(state, scanout_plane);
/* The legacy SetCrtc API doesn't allow us to do scaling, and the
* legacy PageFlip API doesn't allow us to do clipping either. */
@@ -1699,7 +1752,6 @@ drm_output_repaint(struct weston_output *output_base,
weston_log("set mode failed: %m\n");
goto err;
}
- output_base->set_dpms(output_base, WESTON_DPMS_ON);
}
if (drmModePageFlip(backend->drm.fd, output->crtc_id,
@@ -1761,13 +1813,99 @@ drm_output_repaint(struct weston_output *output_base,
}
}
+ if (dpms_prop->prop_id && state->dpms != output->state_cur->dpms) {
+ ret = drmModeConnectorSetProperty(backend->drm.fd,
+ output->connector_id,
+ dpms_prop->prop_id,
+ state->dpms);
+ if (ret) {
+ weston_log("DRM: DPMS: failed property set for %s\n",
+ output->base.name);
+ }
+ }
+
+ drm_output_assign_state(state, DRM_OUTPUT_STATE_UPDATE_ASYNCHRONOUS);
+
return 0;
err:
output->cursor_view = NULL;
-
drm_output_state_free(state);
+ return -1;
+}
+
+static int
+drm_pending_state_apply(struct drm_pending_state *pending_state)
+{
+ struct drm_backend *b = pending_state->backend;
+ struct drm_output_state *output_state, *tmp;
+ uint32_t *unused;
+
+ if (b->state_invalid) {
+ /* If we need to reset all our state (e.g. because we've
+ * just started, or just been VT-switched in), explicitly
+ * disable all the CRTCs we aren't using. This also disables
+ * all connectors on these CRTCs, so we don't need to do that
+ * separately with the pre-atomic API. */
+ wl_array_for_each(unused, &b->unused_crtcs)
+ drmModeSetCrtc(b->drm.fd, *unused, 0, 0, 0, NULL, 0,
+ NULL);
+ }
+ wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
+ link) {
+ struct drm_output *output = output_state->output;
+ int ret;
+
+ ret = drm_output_apply_state(output_state);
+ if (ret != 0) {
+ weston_log("Couldn't apply state for output %s\n",
+ output->base.name);
+ }
+ }
+
+ b->state_invalid = false;
+
+ assert(wl_list_empty(&pending_state->output_list));
+
+ return 0;
+}
+
+static int
+drm_output_repaint(struct weston_output *output_base,
+ pixman_region32_t *damage,
+ void *repaint_data)
+{
+ struct drm_pending_state *pending_state = repaint_data;
+ struct drm_output *output = to_drm_output(output_base);
+ struct drm_output_state *state;
+ struct drm_plane_state *scanout_state;
+
+ if (output->disable_pending || output->destroy_pending)
+ goto err;
+
+ assert(!output->state_last);
+
+ /* If planes have been disabled in the core, we might not have
+ * hit assign_planes at all, so might not have valid output state
+ * here. */
+ state = drm_pending_state_get_output(pending_state, output);
+ if (!state)
+ state = drm_output_state_duplicate(output->state_cur,
+ pending_state,
+ DRM_OUTPUT_STATE_CLEAR_PLANES);
+ state->dpms = WESTON_DPMS_ON;
+
+ drm_output_render(state, damage);
+ scanout_state = drm_output_state_get_plane(state,
+ output->scanout_plane);
+ if (!scanout_state || !scanout_state->fb)
+ goto err;
+
+ return 0;
+
+err:
+ drm_output_state_free(state);
return -1;
}
@@ -1881,6 +2019,9 @@ drm_output_update_msc(struct drm_output *output, unsigned int seq)
}
static void
+drm_output_destroy(struct weston_output *base);
+
+static void
vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
void *data)
{
@@ -1903,9 +2044,6 @@ vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
}
static void
-drm_output_destroy(struct weston_output *base);
-
-static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
@@ -1958,28 +2096,8 @@ drm_repaint_flush(struct weston_compositor *compositor, void *repaint_data)
{
struct drm_backend *b = to_drm_backend(compositor);
struct drm_pending_state *pending_state = repaint_data;
- struct drm_output_state *output_state, *tmp;
- uint32_t *unused;
-
- if (b->state_invalid) {
- /* If we need to reset all our state (e.g. because we've
- * just started, or just been VT-switched in), explicitly
- * disable all the CRTCs we aren't using. This also disables
- * all connectors on these CRTCs, so we don't need to do that
- * separately with the pre-atomic API. */
- wl_array_for_each(unused, &b->unused_crtcs)
- drmModeSetCrtc(b->drm.fd, *unused, 0, 0, 0, NULL, 0,
- NULL);
- }
-
- wl_list_for_each_safe(output_state, tmp, &pending_state->output_list,
- link) {
- drm_output_assign_state(output_state,
- DRM_OUTPUT_STATE_UPDATE_ASYNCHRONOUS);
- }
-
- b->state_invalid = false;
+ drm_pending_state_apply(pending_state);
drm_pending_state_free(pending_state);
b->repaint_data = NULL;
}
@@ -2929,8 +3047,6 @@ drm_output_find_special_plane(struct drm_backend *b, struct drm_output *output,
static void
drm_plane_destroy(struct drm_plane *plane)
{
- drmModeSetPlane(plane->backend->drm.fd, plane->plane_id, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0);
drm_plane_state_free(plane->state_cur, true);
weston_plane_release(&plane->base);
wl_list_remove(&plane->link);
@@ -3126,27 +3242,66 @@ drm_set_backlight(struct weston_output *output_base, uint32_t value)
backlight_set_brightness(output->backlight, new_brightness);
}
+/**
+ * Power output on or off
+ *
+ * The DPMS/power level of an output is used to switch it on or off. This
+ * is DRM's hook for doing so, which can called either as part of repaint,
+ * or independently of the repaint loop.
+ *
+ * If we are called as part of repaint, we simply set the relevant bit in
+ * state and return.
+ */
static void
drm_set_dpms(struct weston_output *output_base, enum dpms_enum level)
{
struct drm_output *output = to_drm_output(output_base);
- struct weston_compositor *ec = output_base->compositor;
- struct drm_backend *b = to_drm_backend(ec);
- struct drm_property_info *prop = &b->props_conn[WDRM_CONNECTOR_DPMS];
+ struct drm_backend *b = to_drm_backend(output_base->compositor);
+ struct drm_pending_state *pending_state = b->repaint_data;
+ struct drm_output_state *state;
int ret;
- if (!prop->prop_id)
+ /* If we're being called during the repaint loop, then this is
+ * simple: discard any previously-generated state, and create a new
+ * state where we disable everything. When we come to flush, this
+ * will be applied. */
+ if (pending_state) {
+ state = drm_pending_state_get_output(pending_state, output);
+ if (state)
+ drm_output_state_free(state);
+ state = drm_output_get_disable_state(pending_state, output);
+ state->dpms = level;
return;
+ }
- ret = drmModeConnectorSetProperty(b->drm.fd, output->connector_id,
- prop->prop_id, level);
- if (ret) {
- weston_log("DRM: DPMS: failed property set for %s\n",
- output->base.name);
+ if (output->state_cur->dpms == level)
+ return;
+
+ /* As we throw everything away when disabling, just send us back through
+ * a repaint cycle. */
+ if (level == WESTON_DPMS_ON) {
+ if (output->dpms_off_pending)
+ output->dpms_off_pending = 0;
+ weston_output_schedule_repaint(output_base);
return;
}
- output->dpms = level;
+ if (output->state_cur->dpms == WESTON_DPMS_OFF)
+ return;
+
+ /* If we've already got a request in the pipeline, then we need to
+ * park our DPMS request until that request has quiesced. */
+ if (output->state_last) {
+ output->dpms_off_pending = 1;
+ return;
+ }
+
+ pending_state = drm_pending_state_alloc(b);
+ drm_output_state_duplicate(output->state_cur, pending_state,
+ DRM_OUTPUT_STATE_CLEAR_PLANES);
+ ret = drm_pending_state_apply(pending_state);
+ if (ret != 0)
+ weston_log("drm_set_dpms: couldn't disable output?\n");
}
static const char * const connector_type_names[] = {
@@ -3948,7 +4103,9 @@ drm_output_disable(struct weston_output *base)
{
struct drm_output *output = to_drm_output(base);
struct drm_backend *b = to_drm_backend(base->compositor);
+ struct drm_pending_state *pending_state;
uint32_t *unused;
+ int ret;
if (output->page_flip_pending || output->vblank_pending) {
output->disable_pending = 1;
@@ -3960,11 +4117,13 @@ drm_output_disable(struct weston_output *base)
output->disable_pending = 0;
- weston_log("Disabling output %s\n", output->base.name);
- drmModeSetCrtc(b->drm.fd, output->crtc_id,
- 0, 0, 0, 0, 0, NULL);
- drm_output_state_free(output->state_cur);
- output->state_cur = NULL;
+ pending_state = drm_pending_state_alloc(b);
+ drm_output_get_disable_state(pending_state, output);
+ ret = drm_pending_state_apply(pending_state);
+ if (ret) {
+ weston_log("Couldn't disable output output %s\n",
+ output->base.name);
+ }
unused = wl_array_add(&b->unused_connectors, sizeof(*unused));
*unused = output->connector_id;
--
2.9.3
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