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[lvgl] Try to allocate smaller buffer on failure (#8814)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Clyde Stubbs 2025-05-22 11:45:56 +10:00 committed by GitHub
parent 5aa13db815
commit 6109acb6f3
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GPG Key ID: B5690EEEBB952194
2 changed files with 19 additions and 6 deletions
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4
esphome/components/lvgl/__init__.py
View File

@ -321,7 +321,7 @@ async def to_code(configs):
frac = 2
elif frac > 0.19:
frac = 4
else:
elif frac != 0:
frac = 8
displays = [
await cg.get_variable(display) for display in config[df.CONF_DISPLAYS]
@ -422,7 +422,7 @@ LVGL_SCHEMA = cv.All(
): lvalid.lv_font,
cv.Optional(df.CONF_FULL_REFRESH, default=False): cv.boolean,
cv.Optional(CONF_DRAW_ROUNDING, default=2): cv.positive_int,
cv.Optional(CONF_BUFFER_SIZE, default="100%"): cv.percentage,
cv.Optional(CONF_BUFFER_SIZE, default=0): cv.percentage,
cv.Optional(df.CONF_LOG_LEVEL, default="WARN"): cv.one_of(
*df.LV_LOG_LEVELS, upper=True
),

21
esphome/components/lvgl/lvgl_esphome.cpp
View File

@ -11,6 +11,8 @@ namespace esphome {
namespace lvgl {
static const char *const TAG = "lvgl";
static const size_t MIN_BUFFER_FRAC = 8;
static const char *const EVENT_NAMES[] = {
"NONE",
"PRESSED",
@ -85,6 +87,7 @@ lv_event_code_t lv_update_event; // NOLINT
void LvglComponent::dump_config() {
ESP_LOGCONFIG(TAG, "LVGL:");
ESP_LOGCONFIG(TAG, " Display width/height: %d x %d", this->disp_drv_.hor_res, this->disp_drv_.ver_res);
ESP_LOGCONFIG(TAG, " Buffer size: %zu%%", 100 / this->buffer_frac_);
ESP_LOGCONFIG(TAG, " Rotation: %d", this->rotation);
ESP_LOGCONFIG(TAG, " Draw rounding: %d", (int) this->draw_rounding);
}
@ -432,18 +435,28 @@ void LvglComponent::setup() {
auto *display = this->displays_[0];
auto width = display->get_width();
auto height = display->get_height();
size_t buffer_pixels = width * height / this->buffer_frac_;
auto frac = this->buffer_frac_;
if (frac == 0)
frac = 1;
size_t buffer_pixels = width * height / frac;
auto buf_bytes = buffer_pixels * LV_COLOR_DEPTH / 8;
void *buffer = nullptr;
if (this->buffer_frac_ >= 4)
if (this->buffer_frac_ >= MIN_BUFFER_FRAC / 2)
buffer = malloc(buf_bytes); // NOLINT
if (buffer == nullptr)
buffer = lv_custom_mem_alloc(buf_bytes); // NOLINT
// if specific buffer size not set and can't get 100%, try for a smaller one
if (buffer == nullptr && this->buffer_frac_ == 0) {
frac = MIN_BUFFER_FRAC;
buffer_pixels /= MIN_BUFFER_FRAC;
buffer = lv_custom_mem_alloc(buf_bytes / MIN_BUFFER_FRAC); // NOLINT
}
if (buffer == nullptr) {
this->mark_failed();
this->status_set_error("Memory allocation failure");
this->mark_failed();
return;
}
this->buffer_frac_ = frac;
lv_disp_draw_buf_init(&this->draw_buf_, buffer, nullptr, buffer_pixels);
this->disp_drv_.hor_res = width;
this->disp_drv_.ver_res = height;
@ -453,8 +466,8 @@ void LvglComponent::setup() {
if (this->rotation != display::DISPLAY_ROTATION_0_DEGREES) {
this->rotate_buf_ = static_cast<lv_color_t *>(lv_custom_mem_alloc(buf_bytes)); // NOLINT
if (this->rotate_buf_ == nullptr) {
this->mark_failed();
this->status_set_error("Memory allocation failure");
this->mark_failed();
return;
}
}