compositor-drm: Introduce drm_plane_state structure
Track dynamic plane state (CRTC, FB, position) in separate structures, rather than as part of the plane. This will make it easier to handle state management later, and much more closely tracks what the kernel does with atomic modesets. The fb_last pointer previously used in drm_plane now becomes part of output->state_last, and is not directly visible from the plane itself. Signed-off-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This commit is contained in:
Daniel Stone
parent
7b2ddacb51
commit
bc15f684f2
@ -268,6 +268,31 @@ struct drm_output_state {
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struct drm_pending_state *pending_state;
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struct drm_output *output;
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struct wl_list link;
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struct wl_list plane_list;
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};
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/**
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* Plane state holds the dynamic state for a plane: where it is positioned,
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* and which buffer it is currently displaying.
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*
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* The plane state is owned by an output state, except when setting an initial
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* state. See drm_output_state for notes on state object lifetime.
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*/
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struct drm_plane_state {
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struct drm_plane *plane;
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struct drm_output *output;
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struct drm_output_state *output_state;
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struct drm_fb *fb;
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int32_t src_x, src_y;
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uint32_t src_w, src_h;
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int32_t dest_x, dest_y;
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uint32_t dest_w, dest_h;
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bool complete;
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struct wl_list link; /* drm_output_state::plane_list */
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};
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/**
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@ -286,11 +311,8 @@ struct drm_output_state {
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* are referred to as 'sprites'.
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*/
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struct drm_plane {
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struct wl_list link;
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struct weston_plane base;
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struct drm_output *output;
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struct drm_backend *backend;
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enum wdrm_plane_type type;
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@ -301,19 +323,10 @@ struct drm_plane {
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struct drm_property_info props[WDRM_PLANE__COUNT];
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/* The last framebuffer submitted to the kernel for this plane. */
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struct drm_fb *fb_current;
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/* The previously-submitted framebuffer, where the hardware has not
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* yet acknowledged display of fb_current. */
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struct drm_fb *fb_last;
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/* Framebuffer we are going to submit to the kernel when the current
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* repaint is flushed. */
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struct drm_fb *fb_pending;
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/* The last state submitted to the kernel for this plane. */
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struct drm_plane_state *state_cur;
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int32_t src_x, src_y;
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uint32_t src_w, src_h;
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uint32_t dest_x, dest_y;
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uint32_t dest_w, dest_h;
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struct wl_list link;
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uint32_t formats[];
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};
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@ -944,6 +957,141 @@ drm_fb_unref(struct drm_fb *fb)
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}
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}
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/**
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* Allocate a new, empty, plane state.
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*/
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static struct drm_plane_state *
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drm_plane_state_alloc(struct drm_output_state *state_output,
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struct drm_plane *plane)
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{
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struct drm_plane_state *state = zalloc(sizeof(*state));
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assert(state);
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state->output_state = state_output;
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state->plane = plane;
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/* Here we only add the plane state to the desired link, and not
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* set the member. Having an output pointer set means that the
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* plane will be displayed on the output; this won't be the case
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* when we go to disable a plane. In this case, it must be part of
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* the commit (and thus the output state), but the member must be
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* NULL, as it will not be on any output when the state takes
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* effect.
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*/
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if (state_output)
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wl_list_insert(&state_output->plane_list, &state->link);
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else
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wl_list_init(&state->link);
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return state;
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}
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/**
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* Free an existing plane state. As a special case, the state will not
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* normally be freed if it is the current state; see drm_plane_set_state.
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*/
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static void
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drm_plane_state_free(struct drm_plane_state *state, bool force)
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{
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if (!state)
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return;
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wl_list_remove(&state->link);
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wl_list_init(&state->link);
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state->output_state = NULL;
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if (force || state != state->plane->state_cur) {
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drm_fb_unref(state->fb);
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free(state);
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}
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}
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/**
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* Duplicate an existing plane state into a new plane state, storing it within
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* the given output state. If the output state already contains a plane state
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* for the drm_plane referenced by 'src', that plane state is freed first.
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*/
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static struct drm_plane_state *
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drm_plane_state_duplicate(struct drm_output_state *state_output,
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struct drm_plane_state *src)
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{
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struct drm_plane_state *dst = malloc(sizeof(*dst));
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struct drm_plane_state *old, *tmp;
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assert(src);
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assert(dst);
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*dst = *src;
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wl_list_init(&dst->link);
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wl_list_for_each_safe(old, tmp, &state_output->plane_list, link) {
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/* Duplicating a plane state into the same output state, so
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* it can replace itself with an identical copy of itself,
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* makes no sense. */
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assert(old != src);
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if (old->plane == dst->plane)
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drm_plane_state_free(old, false);
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}
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wl_list_insert(&state_output->plane_list, &dst->link);
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if (src->fb)
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dst->fb = drm_fb_ref(src->fb);
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dst->output_state = state_output;
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dst->complete = false;
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return dst;
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}
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/**
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* Remove a plane state from an output state; if the plane was previously
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* enabled, then replace it with a disabling state. This ensures that the
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* output state was untouched from it was before the plane state was
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* modified by the caller of this function.
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*
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* This is required as drm_output_state_get_plane may either allocate a
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* new plane state, in which case this function will just perform a matching
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* drm_plane_state_free, or it may instead repurpose an existing disabling
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* state (if the plane was previously active), in which case this function
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* will reset it.
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*/
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static void
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drm_plane_state_put_back(struct drm_plane_state *state)
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{
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struct drm_output_state *state_output;
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struct drm_plane *plane;
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if (!state)
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return;
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state_output = state->output_state;
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plane = state->plane;
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drm_plane_state_free(state, false);
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/* Plane was previously disabled; no need to keep this temporary
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* state around. */
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if (!plane->state_cur->fb)
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return;
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(void) drm_plane_state_alloc(state_output, plane);
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}
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/**
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* Return a plane state from a drm_output_state, either existing or
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* freshly allocated.
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*/
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static struct drm_plane_state *
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drm_output_state_get_plane(struct drm_output_state *state_output,
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struct drm_plane *plane)
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{
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struct drm_plane_state *ps;
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wl_list_for_each(ps, &state_output->plane_list, link) {
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if (ps->plane == plane)
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return ps;
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}
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return drm_plane_state_alloc(state_output, plane);
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}
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/**
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* Allocate a new, empty drm_output_state. This should not generally be used
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* in the repaint cycle; see drm_output_state_duplicate.
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@ -962,6 +1110,8 @@ drm_output_state_alloc(struct drm_output *output,
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else
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wl_list_init(&state->link);
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wl_list_init(&state->plane_list);
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return state;
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}
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@ -979,6 +1129,7 @@ drm_output_state_duplicate(struct drm_output_state *src,
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enum drm_output_state_duplicate_mode plane_mode)
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{
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struct drm_output_state *dst = malloc(sizeof(*dst));
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struct drm_plane_state *ps;
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assert(dst);
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@ -993,6 +1144,20 @@ drm_output_state_duplicate(struct drm_output_state *src,
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else
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wl_list_init(&dst->link);
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wl_list_init(&dst->plane_list);
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wl_list_for_each(ps, &src->plane_list, link) {
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/* Don't carry planes which are now disabled; these should be
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* free for other outputs to reuse. */
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if (!ps->output)
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continue;
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if (plane_mode == DRM_OUTPUT_STATE_CLEAR_PLANES)
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(void) drm_plane_state_alloc(dst, ps->plane);
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else
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(void) drm_plane_state_duplicate(dst, ps);
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}
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return dst;
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}
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@ -1002,10 +1167,16 @@ drm_output_state_duplicate(struct drm_output_state *src,
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static void
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drm_output_state_free(struct drm_output_state *state)
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{
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struct drm_plane_state *ps, *next;
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if (!state)
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return;
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wl_list_for_each_safe(ps, next, &state->plane_list, link)
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drm_plane_state_free(ps, false);
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wl_list_remove(&state->link);
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free(state);
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}
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@ -1090,12 +1261,16 @@ static void
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drm_output_update_complete(struct drm_output *output, uint32_t flags,
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unsigned int sec, unsigned int usec)
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{
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struct drm_plane_state *ps;
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struct timespec ts;
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/* Stop the pageflip timer instead of rearming it here */
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if (output->pageflip_timer)
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wl_event_source_timer_update(output->pageflip_timer, 0);
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wl_list_for_each(ps, &output->state_cur->plane_list, link)
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ps->complete = true;
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drm_output_state_free(output->state_last);
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output->state_last = NULL;
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@ -1129,6 +1304,7 @@ drm_output_assign_state(struct drm_output_state *state,
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enum drm_state_apply_mode mode)
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{
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struct drm_output *output = state->output;
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struct drm_plane_state *plane_state;
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assert(!output->state_last);
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@ -1142,6 +1318,26 @@ drm_output_assign_state(struct drm_output_state *state,
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state->pending_state = NULL;
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output->state_cur = state;
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/* Replace state_cur on each affected plane with the new state, being
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* careful to dispose of orphaned (but only orphaned) previous state.
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* If the previous state is not orphaned (still has an output_state
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* attached), it will be disposed of by freeing the output_state. */
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wl_list_for_each(plane_state, &state->plane_list, link) {
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struct drm_plane *plane = plane_state->plane;
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if (plane->state_cur && !plane->state_cur->output_state)
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drm_plane_state_free(plane->state_cur, true);
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plane->state_cur = plane_state;
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if (mode != DRM_STATE_APPLY_ASYNC) {
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plane_state->complete = true;
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continue;
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}
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if (plane->type == WDRM_PLANE_TYPE_OVERLAY)
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output->vblank_pending++;
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}
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}
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@ -1392,6 +1588,7 @@ drm_output_repaint(struct weston_output *output_base,
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struct drm_output *output = to_drm_output(output_base);
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struct drm_backend *backend =
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to_drm_backend(output->base.compositor);
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struct drm_plane_state *ps;
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struct drm_plane *p;
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struct drm_mode *mode;
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int ret = 0;
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@ -1465,29 +1662,33 @@ drm_output_repaint(struct weston_output *output_base,
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/*
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* Now, update all the sprite surfaces
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*/
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wl_list_for_each(p, &backend->plane_list, link) {
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wl_list_for_each(ps, &state->plane_list, link) {
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uint32_t flags = 0, fb_id = 0;
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drmVBlank vbl = {
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.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT,
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.request.sequence = 1,
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};
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p = ps->plane;
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if (p->type != WDRM_PLANE_TYPE_OVERLAY)
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continue;
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if ((!p->fb_current && !p->fb_pending) ||
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!drm_plane_crtc_supported(output, p))
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continue;
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assert(p->state_cur->complete);
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assert(!!p->state_cur->output == !!p->state_cur->fb);
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assert(!p->state_cur->output || p->state_cur->output == output);
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assert(!ps->complete);
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assert(!ps->output || ps->output == output);
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assert(!!ps->output == !!ps->fb);
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if (p->fb_pending && !backend->sprites_hidden)
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fb_id = p->fb_pending->fb_id;
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if (ps->fb && !backend->sprites_hidden)
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fb_id = ps->fb->fb_id;
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ret = drmModeSetPlane(backend->drm.fd, p->plane_id,
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output->crtc_id, fb_id, flags,
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p->dest_x, p->dest_y,
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p->dest_w, p->dest_h,
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p->src_x, p->src_y,
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p->src_w, p->src_h);
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ps->dest_x, ps->dest_y,
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ps->dest_w, ps->dest_h,
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ps->src_x, ps->src_y,
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ps->src_w, ps->src_h);
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if (ret)
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weston_log("setplane failed: %d: %s\n",
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ret, strerror(errno));
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@ -1498,18 +1699,12 @@ drm_output_repaint(struct weston_output *output_base,
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* Queue a vblank signal so we know when the surface
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* becomes active on the display or has been replaced.
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*/
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vbl.request.signal = (unsigned long) p;
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vbl.request.signal = (unsigned long) ps;
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ret = drmWaitVBlank(backend->drm.fd, &vbl);
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if (ret) {
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weston_log("vblank event request failed: %d: %s\n",
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ret, strerror(errno));
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}
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p->output = output;
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p->fb_last = p->fb_current;
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p->fb_current = p->fb_pending;
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p->fb_pending = NULL;
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output->vblank_pending++;
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}
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return 0;
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@ -1531,6 +1726,7 @@ drm_output_start_repaint_loop(struct weston_output *output_base)
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struct drm_output *output = to_drm_output(output_base);
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struct drm_pending_state *pending_state = NULL;
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struct drm_output_state *state;
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struct drm_plane_state *plane_state;
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struct drm_backend *backend =
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to_drm_backend(output_base->compositor);
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uint32_t fb_id;
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@ -1610,6 +1806,17 @@ drm_output_start_repaint_loop(struct weston_output *output_base)
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output->fb_last = drm_fb_ref(output->fb_current);
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output->page_flip_pending = 1;
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wl_list_for_each(plane_state, &state->plane_list, link) {
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if (plane_state->plane->type != WDRM_PLANE_TYPE_OVERLAY)
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continue;
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vbl.request.type = DRM_VBLANK_RELATIVE | DRM_VBLANK_EVENT;
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vbl.request.type |= drm_waitvblank_pipe(output);
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vbl.request.sequence = 1;
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vbl.request.signal = (unsigned long) plane_state;
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drmWaitVBlank(backend->drm.fd, &vbl);
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}
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drm_output_assign_state(state, DRM_STATE_APPLY_ASYNC);
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drm_pending_state_free(pending_state);
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@ -1638,8 +1845,9 @@ static void
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vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
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void *data)
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{
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struct drm_plane *s = (struct drm_plane *)data;
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struct drm_output *output = s->output;
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struct drm_plane_state *ps = (struct drm_plane_state *) data;
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struct drm_output_state *os = ps->output_state;
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struct drm_output *output = os->output;
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uint32_t flags = WP_PRESENTATION_FEEDBACK_KIND_HW_COMPLETION |
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WP_PRESENTATION_FEEDBACK_KIND_HW_CLOCK;
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@ -1647,9 +1855,7 @@ vblank_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec,
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output->vblank_pending--;
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assert(output->vblank_pending >= 0);
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assert(s->fb_last || s->fb_current);
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drm_fb_unref(s->fb_last);
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s->fb_last = NULL;
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assert(ps->fb);
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if (output->page_flip_pending || output->vblank_pending)
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return;
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@ -1779,8 +1985,8 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
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struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
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struct wl_resource *buffer_resource;
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struct drm_plane *p;
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struct drm_plane_state *state = NULL;
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struct linux_dmabuf_buffer *dmabuf;
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int found = 0;
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struct gbm_bo *bo;
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pixman_region32_t dest_rect, src_rect;
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pixman_box32_t *box, tbox;
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@ -1821,14 +2027,22 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
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if (!drm_plane_crtc_supported(output, p))
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continue;
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if (!p->fb_pending) {
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found = 1;
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break;
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if (!p->state_cur->complete)
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continue;
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if (p->state_cur->output && p->state_cur->output != output)
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continue;
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|
||||
state = drm_output_state_get_plane(output_state, p);
|
||||
if (state->fb) {
|
||||
state = NULL;
|
||||
continue;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* No sprites available */
|
||||
if (!found)
|
||||
if (!state)
|
||||
return NULL;
|
||||
|
||||
if ((dmabuf = linux_dmabuf_buffer_get(buffer_resource))) {
|
||||
@ -1865,28 +2079,26 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
|
||||
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_FD, &gbm_dmabuf,
|
||||
GBM_BO_USE_SCANOUT);
|
||||
#else
|
||||
return NULL;
|
||||
goto err;
|
||||
#endif
|
||||
} else {
|
||||
bo = gbm_bo_import(b->gbm, GBM_BO_IMPORT_WL_BUFFER,
|
||||
buffer_resource, GBM_BO_USE_SCANOUT);
|
||||
}
|
||||
if (!bo)
|
||||
return NULL;
|
||||
goto err;
|
||||
|
||||
format = drm_output_check_plane_format(p, ev, bo);
|
||||
if (format == 0) {
|
||||
gbm_bo_destroy(bo);
|
||||
return NULL;
|
||||
}
|
||||
if (format == 0)
|
||||
goto err;
|
||||
|
||||
p->fb_pending = drm_fb_get_from_bo(bo, b, format, BUFFER_CLIENT);
|
||||
if (!p->fb_pending) {
|
||||
gbm_bo_destroy(bo);
|
||||
return NULL;
|
||||
}
|
||||
state->fb = drm_fb_get_from_bo(bo, b, format, BUFFER_CLIENT);
|
||||
if (!state->fb)
|
||||
goto err;
|
||||
|
||||
drm_fb_set_buffer(p->fb_pending, ev->surface->buffer_ref.buffer);
|
||||
drm_fb_set_buffer(state->fb, ev->surface->buffer_ref.buffer);
|
||||
|
||||
state->output = output;
|
||||
|
||||
box = pixman_region32_extents(&ev->transform.boundingbox);
|
||||
p->base.x = box->x1;
|
||||
@ -1907,10 +2119,10 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
|
||||
output->base.transform,
|
||||
output->base.current_scale,
|
||||
*box);
|
||||
p->dest_x = tbox.x1;
|
||||
p->dest_y = tbox.y1;
|
||||
p->dest_w = tbox.x2 - tbox.x1;
|
||||
p->dest_h = tbox.y2 - tbox.y1;
|
||||
state->dest_x = tbox.x1;
|
||||
state->dest_y = tbox.y1;
|
||||
state->dest_w = tbox.x2 - tbox.x1;
|
||||
state->dest_h = tbox.y2 - tbox.y1;
|
||||
pixman_region32_fini(&dest_rect);
|
||||
|
||||
pixman_region32_init(&src_rect);
|
||||
@ -1947,13 +2159,19 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
|
||||
viewport->buffer.scale,
|
||||
tbox);
|
||||
|
||||
p->src_x = tbox.x1 << 8;
|
||||
p->src_y = tbox.y1 << 8;
|
||||
p->src_w = (tbox.x2 - tbox.x1) << 8;
|
||||
p->src_h = (tbox.y2 - tbox.y1) << 8;
|
||||
state->src_x = tbox.x1 << 8;
|
||||
state->src_y = tbox.y1 << 8;
|
||||
state->src_w = (tbox.x2 - tbox.x1) << 8;
|
||||
state->src_h = (tbox.y2 - tbox.y1) << 8;
|
||||
pixman_region32_fini(&src_rect);
|
||||
|
||||
return &p->base;
|
||||
|
||||
err:
|
||||
drm_plane_state_put_back(state);
|
||||
if (bo)
|
||||
gbm_bo_destroy(bo);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct weston_plane *
|
||||
@ -2500,6 +2718,8 @@ drm_plane_create(struct drm_backend *b, const drmModePlane *kplane)
|
||||
plane->possible_crtcs = kplane->possible_crtcs;
|
||||
plane->plane_id = kplane->plane_id;
|
||||
plane->count_formats = kplane->count_formats;
|
||||
plane->state_cur = drm_plane_state_alloc(NULL, plane);
|
||||
plane->state_cur->complete = true;
|
||||
memcpy(plane->formats, kplane->formats,
|
||||
kplane->count_formats * sizeof(kplane->formats[0]));
|
||||
|
||||
@ -2537,10 +2757,8 @@ 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);
|
||||
assert(!plane->fb_last);
|
||||
assert(!plane->fb_pending);
|
||||
drm_plane_state_free(plane->state_cur, true);
|
||||
drm_property_info_free(plane->props, WDRM_PLANE__COUNT);
|
||||
drm_fb_unref(plane->fb_current);
|
||||
weston_plane_release(&plane->base);
|
||||
wl_list_remove(&plane->link);
|
||||
free(plane);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user