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config/output: Search for output config fallbacks #8095

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merged 2 commits into from May 2, 2024
Merged

config/output: Search for output config fallbacks #8095

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5db0c9b
config/output: Search for output config fallbacks
kennylevinsen Mar 28, 2024
b341cd4
config/output: Print output state during tests
kennylevinsen Apr 21, 2024
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5 changes: 4 additions & 1 deletion include/sway/config.h
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Expand Up @@ -689,10 +689,13 @@ const char *sway_output_scale_filter_to_string(enum scale_filter_mode scale_filt
struct output_config *new_output_config(const char *name);

bool apply_output_configs(struct matched_output_config *configs,
size_t configs_len, bool test_only);
size_t configs_len, bool test_only, bool degrade_to_off);

void apply_all_output_configs(void);

void sort_output_configs_by_priority(struct matched_output_config *configs,
size_t configs_len);

/**
* store_output_config stores a new output config. An output may be matched by
* three different config types, in order of precedence: Identifier, name and
Expand Down
326 changes: 273 additions & 53 deletions sway/config/output.c
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Expand Up @@ -386,22 +386,18 @@ static int compute_default_scale(struct wlr_output *output,
return 2;
}

/* Lists of formats to try, in order, when a specific render bit depth has
* been asked for. The second to last format in each list should always
* be XRGB8888, as a reliable backup in case the others are not available;
* the last should be DRM_FORMAT_INVALID, to indicate the end of the list. */
static const uint32_t *bit_depth_preferences[] = {
[RENDER_BIT_DEPTH_8] = (const uint32_t []){
DRM_FORMAT_XRGB8888,
DRM_FORMAT_INVALID,
},
[RENDER_BIT_DEPTH_10] = (const uint32_t []){
DRM_FORMAT_XRGB2101010,
DRM_FORMAT_XBGR2101010,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_INVALID,
},
};
static bool render_format_is_10bit(uint32_t render_format) {
return render_format == DRM_FORMAT_XRGB2101010 ||
render_format == DRM_FORMAT_XBGR2101010;
}

static bool render_format_is_bgr(uint32_t fmt) {
return fmt == DRM_FORMAT_XBGR2101010 || fmt == DRM_FORMAT_XBGR8888;
}

static bool output_config_is_disabling(struct output_config *oc) {
return oc && (!oc->enabled || oc->power == 0);
}

static void queue_output_config(struct output_config *oc,
struct sway_output *output, struct wlr_output_state *pending) {
Expand All @@ -411,7 +407,7 @@ static void queue_output_config(struct output_config *oc,

struct wlr_output *wlr_output = output->wlr_output;

if (oc && (!oc->enabled || oc->power == 0)) {
if (output_config_is_disabling(oc)) {
sway_log(SWAY_DEBUG, "Turning off output %s", wlr_output->name);
wlr_output_state_set_enabled(pending, false);
return;
Expand All @@ -434,22 +430,6 @@ static void queue_output_config(struct output_config *oc,
struct wlr_output_mode *preferred_mode =
wlr_output_preferred_mode(wlr_output);
wlr_output_state_set_mode(pending, preferred_mode);

if (!wlr_output_test_state(wlr_output, pending)) {
sway_log(SWAY_DEBUG, "Preferred mode rejected, "
"falling back to another mode");
struct wlr_output_mode *mode;
wl_list_for_each(mode, &wlr_output->modes, link) {
if (mode == preferred_mode) {
continue;
}

wlr_output_state_set_mode(pending, mode);
if (wlr_output_test_state(wlr_output, pending)) {
break;
}
}
}
}

if (oc && (oc->subpixel != WL_OUTPUT_SUBPIXEL_UNKNOWN || config->reloading)) {
Expand Down Expand Up @@ -500,25 +480,17 @@ static void queue_output_config(struct output_config *oc,
sway_log(SWAY_DEBUG, "Set %s adaptive sync to %d", wlr_output->name,
oc->adaptive_sync);
wlr_output_state_set_adaptive_sync_enabled(pending, oc->adaptive_sync == 1);
if (oc->adaptive_sync == 1 && !wlr_output_test_state(wlr_output, pending)) {
sway_log(SWAY_DEBUG, "Adaptive sync failed, ignoring");
wlr_output_state_set_adaptive_sync_enabled(pending, false);
}
}

if (oc && oc->render_bit_depth != RENDER_BIT_DEPTH_DEFAULT) {
const uint32_t *fmts = bit_depth_preferences[oc->render_bit_depth];
assert(fmts);

for (size_t i = 0; fmts[i] != DRM_FORMAT_INVALID; i++) {
wlr_output_state_set_render_format(pending, fmts[i]);
if (wlr_output_test_state(wlr_output, pending)) {
break;
}

sway_log(SWAY_DEBUG, "Preferred output format 0x%08x "
"failed to work, falling back to next in "
"list, 0x%08x", fmts[i], fmts[i + 1]);
if (oc->render_bit_depth == RENDER_BIT_DEPTH_10 &&
render_format_is_10bit(output->wlr_output->render_format)) {
// 10-bit was set successfully before, try to save some tests by reusing the format
wlr_output_state_set_render_format(pending, output->wlr_output->render_format);
} else if (oc->render_bit_depth == RENDER_BIT_DEPTH_10) {
wlr_output_state_set_render_format(pending, DRM_FORMAT_XRGB2101010);
} else {
wlr_output_state_set_render_format(pending, DRM_FORMAT_XRGB8888);
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}
}
}
Expand Down Expand Up @@ -649,8 +621,245 @@ struct output_config *find_output_config(struct sway_output *sway_output) {
return result;
}

static bool config_has_auto_mode(struct output_config *oc) {
if (!oc) {
return true;
}
if (oc->drm_mode.type != 0 && oc->drm_mode.type != (uint32_t)-1) {
return true;
} else if (oc->width > 0 && oc->height > 0) {
return true;
}
return false;
}

struct search_context {
struct wlr_output_swapchain_manager *swapchain_mgr;
struct wlr_backend_output_state *states;
struct matched_output_config *configs;
size_t configs_len;
bool degrade_to_off;
};

static void dump_output_state(struct wlr_output *wlr_output, struct wlr_output_state *state) {
sway_log(SWAY_DEBUG, "Output state for %s", wlr_output->name);
if (state->committed & WLR_OUTPUT_STATE_ENABLED) {
sway_log(SWAY_DEBUG, " enabled: %s", state->enabled ? "yes" : "no");
}
if (state->committed & WLR_OUTPUT_STATE_RENDER_FORMAT) {
sway_log(SWAY_DEBUG, " render_format: %d", state->render_format);
}
if (state->committed & WLR_OUTPUT_STATE_MODE) {
if (state->mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM) {
sway_log(SWAY_DEBUG, " custom mode: %dx%d@%dmHz",
state->custom_mode.width, state->custom_mode.height, state->custom_mode.refresh);
} else {
sway_log(SWAY_DEBUG, " mode: %dx%d@%dmHz%s",
state->mode->width, state->mode->height, state->mode->refresh,
state->mode->preferred ? " (preferred)" : "");
}
}
if (state->committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) {
sway_log(SWAY_DEBUG, " adaptive_sync: %s",
state->adaptive_sync_enabled ? "enabled": "disabled");
}
}

static bool search_valid_config(struct search_context *ctx, size_t output_idx);

static void reset_output_state(struct wlr_output_state *state) {
wlr_output_state_finish(state);
wlr_output_state_init(state);
state->committed = 0;
}

static void clear_later_output_states(struct wlr_backend_output_state *states,
size_t configs_len, size_t output_idx) {

// Clear and disable all output states after this one to avoid conflict
// with previous tests.
for (size_t idx = output_idx+1; idx < configs_len; idx++) {
struct wlr_backend_output_state *backend_state = &states[idx];
struct wlr_output_state *state = &backend_state->base;

reset_output_state(state);
wlr_output_state_set_enabled(state, false);
}
}

static bool search_finish(struct search_context *ctx, size_t output_idx) {
struct wlr_backend_output_state *backend_state = &ctx->states[output_idx];
struct wlr_output_state *state = &backend_state->base;
struct wlr_output *wlr_output = backend_state->output;

clear_later_output_states(ctx->states, ctx->configs_len, output_idx);
dump_output_state(wlr_output, state);
return wlr_output_swapchain_manager_prepare(ctx->swapchain_mgr, ctx->states, ctx->configs_len) &&
search_valid_config(ctx, output_idx+1);
}

static bool search_adaptive_sync(struct search_context *ctx, size_t output_idx) {
struct matched_output_config *cfg = &ctx->configs[output_idx];
struct wlr_backend_output_state *backend_state = &ctx->states[output_idx];
struct wlr_output_state *state = &backend_state->base;

if (cfg->config && cfg->config->adaptive_sync == 1) {
wlr_output_state_set_adaptive_sync_enabled(state, true);
if (search_finish(ctx, output_idx)) {
return true;
}
}
if (!cfg->config || cfg->config->adaptive_sync != -1) {
wlr_output_state_set_adaptive_sync_enabled(state, false);
if (search_finish(ctx, output_idx)) {
return true;
}
}
// If adaptive sync has not been set, or fallback in case we are on a
// backend that cannot disable adaptive sync such as the wayland backend.
state->committed &= ~WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED;
return search_finish(ctx, output_idx);
}

static bool search_mode(struct search_context *ctx, size_t output_idx) {
struct matched_output_config *cfg = &ctx->configs[output_idx];
struct wlr_backend_output_state *backend_state = &ctx->states[output_idx];
struct wlr_output_state *state = &backend_state->base;
struct wlr_output *wlr_output = backend_state->output;

if (!config_has_auto_mode(cfg->config)) {
return search_adaptive_sync(ctx, output_idx);
}

struct wlr_output_mode *preferred_mode = wlr_output_preferred_mode(wlr_output);
if (preferred_mode) {
wlr_output_state_set_mode(state, preferred_mode);
if (search_adaptive_sync(ctx, output_idx)) {
return true;
}
}

if (wl_list_empty(&wlr_output->modes)) {
state->committed &= ~WLR_OUTPUT_STATE_MODE;
return search_adaptive_sync(ctx, output_idx);
}

struct wlr_output_mode *mode;
wl_list_for_each(mode, &backend_state->output->modes, link) {
if (mode == preferred_mode) {
continue;
}
wlr_output_state_set_mode(state, mode);
if (search_adaptive_sync(ctx, output_idx)) {
return true;
}
}

return false;
}

static bool search_render_format(struct search_context *ctx, size_t output_idx) {
struct matched_output_config *cfg = &ctx->configs[output_idx];
struct wlr_backend_output_state *backend_state = &ctx->states[output_idx];
struct wlr_output_state *state = &backend_state->base;
struct wlr_output *wlr_output = backend_state->output;

uint32_t fmts[] = {
DRM_FORMAT_XRGB2101010,
DRM_FORMAT_XBGR2101010,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_INVALID,
};
if (render_format_is_bgr(wlr_output->render_format)) {
// Start with BGR in the unlikely event that we previously required it.
fmts[0] = DRM_FORMAT_XBGR2101010;
fmts[1] = DRM_FORMAT_XRGB2101010;
}

const struct wlr_drm_format_set *primary_formats =
wlr_output_get_primary_formats(wlr_output, WLR_BUFFER_CAP_DMABUF);
bool need_10bit = cfg->config && cfg->config->render_bit_depth == RENDER_BIT_DEPTH_10;
for (size_t idx = 0; fmts[idx] != DRM_FORMAT_INVALID; idx++) {
if (!need_10bit && render_format_is_10bit(fmts[idx])) {
continue;
}
if (!wlr_drm_format_set_get(primary_formats, fmts[idx])) {
// This is not a supported format for this output
continue;
}
wlr_output_state_set_render_format(state, fmts[idx]);
if (search_mode(ctx, output_idx)) {
return true;
}
}
return false;
}

static bool search_valid_config(struct search_context *ctx, size_t output_idx) {
if (output_idx >= ctx->configs_len) {
// We reached the end of the search, all good!
return true;
}

struct matched_output_config *cfg = &ctx->configs[output_idx];
struct wlr_backend_output_state *backend_state = &ctx->states[output_idx];
struct wlr_output_state *state = &backend_state->base;
struct wlr_output *wlr_output = backend_state->output;

if (!output_config_is_disabling(cfg->config)) {
// Search through our possible configurations, doing a depth-first
// through render_format, modes, adaptive_sync and the next output's
// config.
queue_output_config(cfg->config, cfg->output, &backend_state->base);
if (search_render_format(ctx, output_idx)) {
return true;
} else if (!ctx->degrade_to_off) {
return false;
}
// We could not get anything to work, try to disable this output to see
// if we can at least make the outputs before us work.
sway_log(SWAY_DEBUG, "Unable to find valid config with output %s, disabling",
wlr_output->name);
reset_output_state(state);
}

wlr_output_state_set_enabled(state, false);
return search_finish(ctx, output_idx);
}

static int compare_matched_output_config_priority(const void *a, const void *b) {

const struct matched_output_config *amc = a;
const struct matched_output_config *bmc = b;
bool a_disabling = output_config_is_disabling(amc->config);
bool b_disabling = output_config_is_disabling(bmc->config);
bool a_enabled = amc->output->enabled;
bool b_enabled = bmc->output->enabled;

// We want to give priority to existing enabled outputs. To do so, we want
// the configuration order to be:
// 1. Existing, enabled outputs
// 2. Outputs that need to be enabled
// 3. Disabled or disabling outputs
if (a_enabled && !a_disabling) {
return -1;
} else if (b_enabled && !b_disabling) {
return 1;
} else if (b_disabling && !a_disabling) {
return -1;
} else if (a_disabling && !b_disabling) {
return 1;
}
return 0;
}

void sort_output_configs_by_priority(struct matched_output_config *configs,
size_t configs_len) {
qsort(configs, configs_len, sizeof(*configs), compare_matched_output_config_priority);
}

bool apply_output_configs(struct matched_output_config *configs,
size_t configs_len, bool test_only) {
size_t configs_len, bool test_only, bool degrade_to_off) {
struct wlr_backend_output_state *states = calloc(configs_len, sizeof(*states));
if (!states) {
return false;
Expand All @@ -674,8 +883,18 @@ bool apply_output_configs(struct matched_output_config *configs,

bool ok = wlr_output_swapchain_manager_prepare(&swapchain_mgr, states, configs_len);
if (!ok) {
sway_log(SWAY_ERROR, "Swapchain prepare failed");
goto out;
sway_log(SWAY_ERROR, "Requested backend configuration failed, searching for valid fallbacks");
struct search_context ctx = {
.swapchain_mgr = &swapchain_mgr,
.states = states,
.configs = configs,
.configs_len = configs_len,
.degrade_to_off = degrade_to_off,
};
if (!search_valid_config(&ctx, 0)) {
sway_log(SWAY_ERROR, "Search for valid config failed");
goto out;
}
}

if (test_only) {
Expand Down Expand Up @@ -761,7 +980,8 @@ void apply_all_output_configs(void) {
config->config = find_output_config(sway_output);
}

apply_output_configs(configs, configs_len, false);
sort_output_configs_by_priority(configs, configs_len);
apply_output_configs(configs, configs_len, false, true);
for (size_t idx = 0; idx < configs_len; idx++) {
struct matched_output_config *cfg = &configs[idx];
free_output_config(cfg->config);
Expand Down