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Merge branch 'fix/rgb_lcd_restart_bb_index' into 'master'

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fix(rgb_lcd): resync bounce buffer index when restarting DMA

Closes IDFGH-18263

See merge request espressif/esp-idf!52748
This commit is contained in:
Chen Ji Chang
2026-09-15 17:08:19 +08:00
parent 05e589b076 c0fb05b37e
commit b5ebdde954
1 changed files with 4 additions and 2 deletions
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components/esp_lcd/rgb/esp_lcd_panel_rgb.c
+4 -2
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@@ -1403,10 +1403,10 @@ static IRAM_ATTR void lcd_rgb_panel_try_restart_transmission(esp_rgb_panel_t *pa
{ {
int bb_size_px = panel->bb_size / (panel->fb_bits_per_pixel / 8); int bb_size_px = panel->bb_size / (panel->fb_bits_per_pixel / 8);
bool do_restart = false; bool do_restart = false;
portENTER_CRITICAL_ISR(&panel->spinlock);
#if CONFIG_LCD_RGB_RESTART_IN_VSYNC #if CONFIG_LCD_RGB_RESTART_IN_VSYNC
do_restart = true; do_restart = true;
#else #else
portENTER_CRITICAL_ISR(&panel->spinlock);
if (panel->flags.need_restart) { if (panel->flags.need_restart) {
panel->flags.need_restart = false; panel->flags.need_restart = false;
do_restart = true; do_restart = true;
@@ -1414,9 +1414,10 @@ static IRAM_ATTR void lcd_rgb_panel_try_restart_transmission(esp_rgb_panel_t *pa
if (panel->bb_eof_count < panel->expect_eof_count) { if (panel->bb_eof_count < panel->expect_eof_count) {
do_restart = true; do_restart = true;
} }
#endif // CONFIG_LCD_RGB_RESTART_IN_VSYNC
// DMA restart always relaunches from bounce buffer 0. Keep the software index in sync
panel->bb_eof_count = 0; panel->bb_eof_count = 0;
portEXIT_CRITICAL_ISR(&panel->spinlock); portEXIT_CRITICAL_ISR(&panel->spinlock);
#endif // CONFIG_LCD_RGB_RESTART_IN_VSYNC
if (!do_restart) { if (!do_restart) {
return; return;
@@ -1467,6 +1468,7 @@ static void lcd_rgb_panel_start_transmission(esp_rgb_panel_t *rgb_panel)
// pre-fill bounce buffers if needed // pre-fill bounce buffers if needed
if (rgb_panel->bb_size) { if (rgb_panel->bb_size) {
rgb_panel->bounce_pos_px = 0; rgb_panel->bounce_pos_px = 0;
rgb_panel->bb_eof_count = 0;
lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[0]); lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[0]);
lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[1]); lcd_rgb_panel_fill_bounce_buffer(rgb_panel, rgb_panel->bounce_buffer[1]);
} }