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compositor-drm: Add drm-backend log debug scope

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Add a 'drm-debug' scope which prints verbose information about the DRM
backend's repaint cycle, including the decision tree on how views are
assigned (or not) to planes.

Signed-off-by: Daniel Stone <daniels@collabora.com>
dev
Daniel Stone 7 years ago
parent 64dbbee7f6
commit 1cbe1f952d
1 changed files with 258 additions and 27 deletions
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  1. 285
      libweston/compositor-drm.c

285
libweston/compositor-drm.c
Unescape View File

@ -51,6 +51,7 @@
#include "compositor.h"
#include "compositor-drm.h"
#include "weston-debug.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
#include "gl-renderer.h"
@ -73,6 +74,42 @@
#define GBM_BO_USE_CURSOR GBM_BO_USE_CURSOR_64X64
#endif
/**
* A small wrapper to print information into the 'drm-backend' debug scope.
*
* The following conventions are used to print variables:
*
* - fixed uint32_t values, including Weston object IDs such as weston_output
* IDs, DRM object IDs such as CRTCs or properties, and GBM/DRM formats:
* "%lu (0x%lx)" (unsigned long) value, (unsigned long) value
*
* - fixed uint64_t values, such as DRM property values (including object IDs
* when used as a value):
* "%llu (0x%llx)" (unsigned long long) value, (unsigned long long) value
*
* - non-fixed-width signed int:
* "%d" value
*
* - non-fixed-width unsigned int:
* "%u (0x%x)" value, value
*
* - non-fixed-width unsigned long:
* "%lu (0x%lx)" value, value
*
* Either the integer or hexadecimal forms may be omitted if it is known that
* one representation is not useful (e.g. width/height in hex are rarely what
* you want).
*
* This is to avoid implicit widening or narrowing when we use fixed-size
* types: uint32_t can be resolved by either unsigned int or unsigned long
* on a 32-bit system but only unsigned int on a 64-bit system, with uint64_t
* being unsigned long long on a 32-bit system and unsigned long on a 64-bit
* system. To avoid confusing side effects, we explicitly cast to the widest
* possible type and use a matching format specifier.
*/
#define drm_debug(b, ...) \
weston_debug_scope_printf((b)->debug, __VA_ARGS__)
#define MAX_CLONED_CONNECTORS 4
/**
@ -302,6 +339,8 @@ struct drm_backend {
bool shutting_down;
bool aspect_ratio_supported;
struct weston_debug_scope *debug;
};
struct drm_mode {
@ -2357,6 +2396,10 @@ crtc_add_prop(drmModeAtomicReq *req, struct drm_output *output,
ret = drmModeAtomicAddProperty(req, output->crtc_id, info->prop_id,
val);
drm_debug(output->backend, "\t\t\t[CRTC:%lu] %lu (%s) -> %llu (0x%llx)\n",
(unsigned long) output->crtc_id,
(unsigned long) info->prop_id, info->name,
(unsigned long long) val, (unsigned long long) val);
return (ret <= 0) ? -1 : 0;
}
@ -2372,6 +2415,10 @@ connector_add_prop(drmModeAtomicReq *req, struct drm_head *head,
ret = drmModeAtomicAddProperty(req, head->connector_id,
info->prop_id, val);
drm_debug(head->backend, "\t\t\t[CONN:%lu] %lu (%s) -> %llu (0x%llx)\n",
(unsigned long) head->connector_id,
(unsigned long) info->prop_id, info->name,
(unsigned long long) val, (unsigned long long) val);
return (ret <= 0) ? -1 : 0;
}
@ -2387,6 +2434,10 @@ plane_add_prop(drmModeAtomicReq *req, struct drm_plane *plane,
ret = drmModeAtomicAddProperty(req, plane->plane_id, info->prop_id,
val);
drm_debug(plane->backend, "\t\t\t[PLANE:%lu] %lu (%s) -> %llu (0x%llx)\n",
(unsigned long) plane->plane_id,
(unsigned long) info->prop_id, info->name,
(unsigned long long) val, (unsigned long long) val);
return (ret <= 0) ? -1 : 0;
}
@ -2405,6 +2456,9 @@ drm_mode_ensure_blob(struct drm_backend *backend, struct drm_mode *mode)
if (ret != 0)
weston_log("failed to create mode property blob: %m\n");
drm_debug(backend, "\t\t\t[atomic] created new mode blob %lu for %s",
(unsigned long) mode->blob_id, mode->mode_info.name);
return ret;
}
@ -2414,17 +2468,23 @@ drm_output_apply_state_atomic(struct drm_output_state *state,
uint32_t *flags)
{
struct drm_output *output = state->output;
struct drm_backend *backend = to_drm_backend(output->base.compositor);
struct drm_backend *b = to_drm_backend(output->base.compositor);
struct drm_plane_state *plane_state;
struct drm_mode *current_mode = to_drm_mode(output->base.current_mode);
struct drm_head *head;
int ret = 0;
if (state->dpms != output->state_cur->dpms)
drm_debug(b, "\t\t[atomic] %s output %lu (%s) state\n",
(*flags & DRM_MODE_ATOMIC_TEST_ONLY) ? "testing" : "applying",
(unsigned long) output->base.id, output->base.name);
if (state->dpms != output->state_cur->dpms) {
drm_debug(b, "\t\t\t[atomic] DPMS state differs, modeset OK\n");
*flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
}
if (state->dpms == WESTON_DPMS_ON) {
ret = drm_mode_ensure_blob(backend, current_mode);
ret = drm_mode_ensure_blob(b, current_mode);
if (ret != 0)
return ret;
@ -2522,6 +2582,9 @@ drm_pending_state_apply_atomic(struct drm_pending_state *pending_state,
uint32_t *unused;
int err;
drm_debug(b, "\t\t[atomic] previous state invalid; "
"starting with fresh state\n");
/* 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 and connectors we aren't using. */
@ -2534,9 +2597,16 @@ drm_pending_state_apply_atomic(struct drm_pending_state *pending_state,
head = to_drm_head(head_base);
drm_debug(b, "\t\t[atomic] disabling inactive head %s\n",
head_base->name);
info = &head->props_conn[WDRM_CONNECTOR_CRTC_ID];
err = drmModeAtomicAddProperty(req, head->connector_id,
info->prop_id, 0);
drm_debug(b, "\t\t\t[CONN:%lu] %lu (%s) -> 0\n",
(unsigned long) head->connector_id,
(unsigned long) info->prop_id,
info->name);
if (err <= 0)
ret = -1;
}
@ -2573,12 +2643,21 @@ drm_pending_state_apply_atomic(struct drm_pending_state *pending_state,
continue;
}
drm_debug(b, "\t\t[atomic] disabling unused CRTC %lu\n",
(unsigned long) *unused);
drm_debug(b, "\t\t\t[CRTC:%lu] %lu (%s) -> 0\n",
(unsigned long) *unused,
(unsigned long) info->prop_id, info->name);
err = drmModeAtomicAddProperty(req, *unused,
info->prop_id, 0);
if (err <= 0)
ret = -1;
info = &infos[WDRM_CRTC_MODE_ID];
drm_debug(b, "\t\t\t[CRTC:%lu] %lu (%s) -> 0\n",
(unsigned long) *unused,
(unsigned long) info->prop_id, info->name);
err = drmModeAtomicAddProperty(req, *unused,
info->prop_id, 0);
if (err <= 0)
@ -2590,6 +2669,8 @@ drm_pending_state_apply_atomic(struct drm_pending_state *pending_state,
/* Disable all the planes; planes which are being used will
* override this state in the output-state application. */
wl_list_for_each(plane, &b->plane_list, link) {
drm_debug(b, "\t\t[atomic] starting with plane %lu disabled\n",
(unsigned long) plane->plane_id);
plane_add_prop(req, plane, WDRM_PLANE_CRTC_ID, 0);
plane_add_prop(req, plane, WDRM_PLANE_FB_ID, 0);
}
@ -2972,6 +3053,14 @@ drm_repaint_begin(struct weston_compositor *compositor)
ret = drm_pending_state_alloc(b);
b->repaint_data = ret;
if (weston_debug_scope_is_enabled(b->debug)) {
char *dbg = weston_compositor_print_scene_graph(compositor);
drm_debug(b, "[repaint] Beginning repaint; pending_state %p\n",
ret);
drm_debug(b, "%s", dbg);
free(dbg);
}
return ret;
}
@ -2991,6 +3080,7 @@ drm_repaint_flush(struct weston_compositor *compositor, void *repaint_data)
struct drm_pending_state *pending_state = repaint_data;
drm_pending_state_apply(pending_state);
drm_debug(b, "[repaint] flushed pending_state %p\n", pending_state);
b->repaint_data = NULL;
}
@ -3007,6 +3097,7 @@ drm_repaint_cancel(struct weston_compositor *compositor, void *repaint_data)
struct drm_pending_state *pending_state = repaint_data;
drm_pending_state_free(pending_state);
drm_debug(b, "[repaint] cancel pending_state %p\n", pending_state);
b->repaint_data = NULL;
}
@ -3050,12 +3141,21 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
struct drm_fb *fb;
unsigned int i;
int ret;
enum {
NO_PLANES,
NO_PLANES_WITH_FORMAT,
NO_PLANES_ACCEPTED,
PLACED_ON_PLANE,
} availability = NO_PLANES;
assert(!b->sprites_are_broken);
fb = drm_fb_get_from_view(output_state, ev);
if (!fb)
if (!fb) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
" couldn't get fb\n", ev);
return NULL;
}
wl_list_for_each(p, &b->plane_list, link) {
if (p->type != WDRM_PLANE_TYPE_OVERLAY)
@ -3064,6 +3164,15 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
if (!drm_plane_is_available(p, output))
continue;
state = drm_output_state_get_plane(output_state, p);
if (state->fb) {
state = NULL;
continue;
}
if (availability == NO_PLANES)
availability = NO_PLANES_WITH_FORMAT;
/* Check whether the format is supported */
for (i = 0; i < p->count_formats; i++) {
unsigned int j;
@ -3084,15 +3193,14 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
if (i == p->count_formats)
continue;
state = drm_output_state_get_plane(output_state, p);
if (state->fb) {
state = NULL;
continue;
}
if (availability == NO_PLANES_WITH_FORMAT)
availability = NO_PLANES_ACCEPTED;
state->ev = ev;
state->output = output;
if (!drm_plane_state_coords_for_view(state, ev)) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"unsuitable transform\n", ev);
drm_plane_state_put_back(state);
state = NULL;
continue;
@ -3100,6 +3208,8 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
if (!b->atomic_modeset &&
(state->src_w != state->dest_w << 16 ||
state->src_h != state->dest_h << 16)) {
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no scaling without atomic\n", ev);
drm_plane_state_put_back(state);
state = NULL;
continue;
@ -3113,17 +3223,48 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
/* In planes-only mode, we don't have an incremental state to
* test against, so we just hope it'll work. */
if (mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY)
if (mode == DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY) {
drm_debug(b, "\t\t\t\t[overlay] provisionally placing "
"view %p on overlay %lu in planes-only mode\n",
ev, (unsigned long) p->plane_id);
availability = PLACED_ON_PLANE;
goto out;
}
ret = drm_pending_state_test(output_state->pending_state);
if (ret == 0)
if (ret == 0) {
drm_debug(b, "\t\t\t\t[overlay] provisionally placing "
"view %p on overlay %d in mixed mode\n",
ev, p->plane_id);
availability = PLACED_ON_PLANE;
goto out;
}
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay %lu "
"in mixed mode: kernel test failed\n",
ev, (unsigned long) p->plane_id);
drm_plane_state_put_back(state);
state = NULL;
}
switch (availability) {
case NO_PLANES:
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no free overlay planes\n", ev);
break;
case NO_PLANES_WITH_FORMAT:
drm_debug(b, "\t\t\t\t[overlay] not placing view %p on overlay: "
"no free overlay planes matching format 0x%lx, "
"modifier 0x%llx\n",
ev, (unsigned long) fb->format,
(unsigned long long) fb->modifier);
break;
case NO_PLANES_ACCEPTED:
case PLACED_ON_PLANE:
break;
}
out:
drm_fb_unref(fb);
return state;
@ -3192,13 +3333,23 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state,
if (b->gbm == NULL)
return NULL;
if (ev->surface->buffer_ref.buffer == NULL)
if (ev->surface->buffer_ref.buffer == NULL) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(no buffer available)\n", ev);
return NULL;
}
shmbuf = wl_shm_buffer_get(ev->surface->buffer_ref.buffer->resource);
if (!shmbuf)
if (!shmbuf) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(buffer isn't SHM)\n", ev);
return NULL;
if (wl_shm_buffer_get_format(shmbuf) != WL_SHM_FORMAT_ARGB8888)
}
if (wl_shm_buffer_get_format(shmbuf) != WL_SHM_FORMAT_ARGB8888) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(format 0x%lx unsuitable)\n",
ev, (unsigned long) wl_shm_buffer_get_format(shmbuf));
return NULL;
}
plane_state =
drm_output_state_get_plane(output_state, output->cursor_plane);
@ -3216,8 +3367,11 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state,
plane_state->src_w > (unsigned) b->cursor_width << 16 ||
plane_state->src_h > (unsigned) b->cursor_height << 16 ||
plane_state->src_w != plane_state->dest_w << 16 ||
plane_state->src_h != plane_state->dest_h << 16)
plane_state->src_h != plane_state->dest_h << 16) {
drm_debug(b, "\t\t\t\t[cursor] not assigning view %p to cursor plane "
"(positioning requires cropping or scaling)\n", ev);
goto err;
}
/* Since we're setting plane state up front, we need to work out
* whether or not we need to upload a new cursor. We can't use the
@ -3240,8 +3394,10 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state,
plane_state->fb =
drm_fb_ref(output->gbm_cursor_fb[output->current_cursor]);
if (needs_update)
if (needs_update) {
drm_debug(b, "\t\t\t\t[cursor] copying new content to cursor BO\n");
cursor_bo_update(plane_state, ev);
}
/* The cursor API is somewhat special: in cursor_bo_update(), we upload
* a buffer which is always cursor_width x cursor_height, even if the
@ -3252,6 +3408,9 @@ drm_output_prepare_cursor_view(struct drm_output_state *output_state,
plane_state->dest_w = b->cursor_width;
plane_state->dest_h = b->cursor_height;
drm_debug(b, "\t\t\t\t[cursor] provisionally assigned view %p to cursor\n",
ev);
return plane_state;
err:
@ -3347,18 +3506,32 @@ drm_output_propose_state(struct weston_output *output_base,
if (!scanout_fb ||
(scanout_fb->type != BUFFER_GBM_SURFACE &&
scanout_fb->type != BUFFER_PIXMAN_DUMB)) {
drm_debug(b, "\t\t[state] cannot propose mixed mode: "
"for output %s (%lu): no previous renderer "
"fb\n",
output->base.name,
(unsigned long) output->base.id);
drm_output_state_free(state);
return NULL;
}
if (scanout_fb->width != output_base->current_mode->width ||
scanout_fb->height != output_base->current_mode->height) {
drm_debug(b, "\t\t[state] cannot propose mixed mode "
"for output %s (%lu): previous fb has "
"different size\n",
output->base.name,
(unsigned long) output->base.id);
drm_output_state_free(state);
return NULL;
}
scanout_state = drm_plane_state_duplicate(state,
plane->state_cur);
drm_debug(b, "\t\t[state] using renderer FB ID %lu for mixed "
"mode for output %s (%lu)\n",
(unsigned long) scanout_fb->fb_id, output->base.name,
(unsigned long) output->base.id);
}
/*
@ -3384,18 +3557,32 @@ drm_output_propose_state(struct weston_output *output_base,
bool totally_occluded = false;
bool overlay_occluded = false;
drm_debug(b, "\t\t\t[view] evaluating view %p for "
"output %s (%lu)\n",
ev, output->base.name,
(unsigned long) output->base.id);
/* If this view doesn't touch our output at all, there's no
* reason to do anything with it. */
if (!(ev->output_mask & (1u << output->base.id)))
if (!(ev->output_mask & (1u << output->base.id))) {
drm_debug(b, "\t\t\t\t[view] ignoring view %p "
"(not on our output)\n", ev);
continue;
}
/* We only assign planes to views which are exclusively present
* on our output. */
if (ev->output_mask != (1u << output->base.id))
if (ev->output_mask != (1u << output->base.id)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(on multiple outputs)\n", ev);
force_renderer = true;
}
if (!ev->surface->buffer_ref.buffer)
if (!ev->surface->buffer_ref.buffer) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(no buffer available)\n", ev);
force_renderer = true;
}
/* Ignore views we know to be totally occluded. */
pixman_region32_init(&clipped_view);
@ -3408,6 +3595,8 @@ drm_output_propose_state(struct weston_output *output_base,
&occluded_region);
totally_occluded = !pixman_region32_not_empty(&surface_overlap);
if (totally_occluded) {
drm_debug(b, "\t\t\t\t[view] ignoring view %p "
"(occluded on our output)\n", ev);
pixman_region32_fini(&surface_overlap);
pixman_region32_fini(&clipped_view);
continue;
@ -3418,8 +3607,11 @@ drm_output_propose_state(struct weston_output *output_base,
* be part of, or occluded by, it, and cannot go on a plane. */
pixman_region32_intersect(&surface_overlap, &renderer_region,
&clipped_view);
if (pixman_region32_not_empty(&surface_overlap))
if (pixman_region32_not_empty(&surface_overlap)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(occluded by renderer views)\n", ev);
force_renderer = true;
}
/* We do not control the stacking order of overlay planes;
* the scanout plane is strictly stacked bottom and the cursor
@ -3428,8 +3620,11 @@ drm_output_propose_state(struct weston_output *output_base,
* planes overlapping each other. */
pixman_region32_intersect(&surface_overlap, &occluded_region,
&clipped_view);
if (pixman_region32_not_empty(&surface_overlap))
if (pixman_region32_not_empty(&surface_overlap)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(occluded by other overlay planes)\n", ev);
overlay_occluded = true;
}
pixman_region32_fini(&surface_overlap);
/* The cursor plane is 'special' in the sense that we can still
@ -3441,10 +3636,16 @@ drm_output_propose_state(struct weston_output *output_base,
/* If sprites are disabled or the view is not fully opaque, we
* must put the view into the renderer - unless it has already
* been placed in the cursor plane, which can handle alpha. */
if (!ps && !planes_ok)
if (!ps && !planes_ok) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(precluded by mode)\n", ev);
force_renderer = true;
if (!ps && !drm_view_is_opaque(ev))
}
if (!ps && !drm_view_is_opaque(ev)) {
drm_debug(b, "\t\t\t\t[view] not assigning view %p to plane "
"(view not fully opaque)\n", ev);
force_renderer = true;
}
/* Only try to place scanout surfaces in planes-only mode; in
* mixed mode, we have already failed to place a view on the
@ -3477,6 +3678,9 @@ drm_output_propose_state(struct weston_output *output_base,
* check if this is OK, and add ourselves to the renderer
* region if so. */
if (!renderer_ok) {
drm_debug(b, "\t\t[view] failing state generation: "
"placing view %p to renderer not allowed\n",
ev);
pixman_region32_fini(&clipped_view);
goto err_region;
}
@ -3496,8 +3700,11 @@ drm_output_propose_state(struct weston_output *output_base,
/* Check to see if this state will actually work. */
ret = drm_pending_state_test(state->pending_state);
if (ret != 0)
if (ret != 0) {
drm_debug(b, "\t\t[view] failing state generation: "
"atomic test not OK\n");
goto err;
}
/* Counterpart to duplicating scanout state at the top of this
* function: if we have taken a renderer framebuffer and placed it in
@ -3530,13 +3737,25 @@ drm_assign_planes(struct weston_output *output_base, void *repaint_data)
struct weston_view *ev;
struct weston_plane *primary = &output_base->compositor->primary_plane;
drm_debug(b, "\t[repaint] preparing state for output %s (%lu)\n",
output_base->name, (unsigned long) output_base->id);
if (!b->sprites_are_broken) {
state = drm_output_propose_state(output_base, pending_state,
DRM_OUTPUT_PROPOSE_STATE_PLANES_ONLY);
if (!state)
if (!state) {
drm_debug(b, "\t[repaint] could not build planes-only "
"state, trying mixed\n");
state = drm_output_propose_state(output_base, pending_state,
DRM_OUTPUT_PROPOSE_STATE_MIXED);
}
if (!state) {
drm_debug(b, "\t[repaint] could not build mixed-mode "
"state, trying renderer-only\n");
}
} else {
drm_debug(b, "\t[state] no overlay plane support\n");
}
if (!state)
state = drm_output_propose_state(output_base, pending_state,
@ -3582,10 +3801,16 @@ drm_assign_planes(struct weston_output *output_base, void *repaint_data)
}
}
if (target_plane)
if (target_plane) {
drm_debug(b, "\t[repaint] view %p on %s plane %lu\n",
ev, plane_type_enums[target_plane->type].name,
(unsigned long) target_plane->plane_id);
weston_view_move_to_plane(ev, &target_plane->base);
else
} else {
drm_debug(b, "\t[repaint] view %p using renderer "
"composition\n", ev);
weston_view_move_to_plane(ev, primary);
}
if (!target_plane ||
target_plane->type == WDRM_PLANE_TYPE_CURSOR) {
@ -6264,6 +6489,8 @@ drm_destroy(struct weston_compositor *ec)
destroy_sprites(b);
weston_debug_scope_destroy(b->debug);
b->debug = NULL;
weston_compositor_shutdown(ec);
wl_list_for_each_safe(base, next, &ec->head_list, compositor_link)
@ -6725,6 +6952,10 @@ drm_backend_create(struct weston_compositor *compositor,
b->pageflip_timeout = config->pageflip_timeout;
b->use_pixman_shadow = config->use_pixman_shadow;
b->debug = weston_compositor_add_debug_scope(compositor, "drm-backend",
"Debug messages from DRM/KMS backend\n",
NULL, NULL);
compositor->backend = &b->base;
if (parse_gbm_format(config->gbm_format, GBM_FORMAT_XRGB8888, &b->gbm_format) < 0)

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