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fix(display): Tweak EPD driver init/blanking.

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Ensure we only clear the display when turning blanking off the
first time, not every time, to avoid duplicate clears.
This commit is contained in:
Peter Johanson 2023-03-17 06:20:33 +00:00 • committed by Pete Johanson
parent 0c5bcf5fe4
commit 313ed6adb6
1 changed files with 7 additions and 1 deletions
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8
app/drivers/display/il0323.c
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@ -47,6 +47,7 @@ static uint8_t il0323_pwr[] = DT_INST_PROP(0, pwr);
static uint8_t last_buffer[IL0323_BUFFER_SIZE]; static uint8_t last_buffer[IL0323_BUFFER_SIZE];
static bool blanking_on = true; static bool blanking_on = true;
static bool init_clear_done = false;
static inline int il0323_write_cmd(const struct il0323_cfg *cfg, uint8_t cmd, uint8_t *data, static inline int il0323_write_cmd(const struct il0323_cfg *cfg, uint8_t cmd, uint8_t *data,
size_t len) { size_t len) {
@ -198,16 +199,21 @@ static int il0323_clear_and_write_buffer(const struct device *dev, uint8_t patte
static int il0323_blanking_off(const struct device *dev) { static int il0323_blanking_off(const struct device *dev) {
const struct il0323_cfg *cfg = dev->config; const struct il0323_cfg *cfg = dev->config;
if (blanking_on) { if (!init_clear_done) {
/* Update EPD panel in normal mode */ /* Update EPD panel in normal mode */
il0323_busy_wait(cfg); il0323_busy_wait(cfg);
if (il0323_clear_and_write_buffer(dev, 0xff, true)) { if (il0323_clear_and_write_buffer(dev, 0xff, true)) {
return -EIO; return -EIO;
} }
init_clear_done = true;
} }
blanking_on = false; blanking_on = false;
if (il0323_update_display(dev)) {
return -EIO;
}
return 0; return 0;
} }