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feat(core): Add max backlight limit to backlight driver. [no changelog]

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This commit is contained in:
kopecdav 2025-04-15 14:57:04 +02:00 committed by kopecdav
parent 46d6732462
commit f9dfb3ef1b
2 changed files with 59 additions and 6 deletions
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11
core/embed/io/backlight/inc/io/backlight.h
View File

@ -19,6 +19,9 @@
#pragma once
#define BACKLIGHT_MAX_LEVEL 255
#define BACKLIGHT_MIN_LEVEL 0
// Action to be taken when initializing or
// deinitializing the backlight driver
typedef enum {
@ -41,7 +44,8 @@ void backlight_init(backlight_action_t action);
// is kept on.
void backlight_deinit(backlight_action_t action);
// Sets the backlight level in range 0-255 and returns the actual level set.
// Request the backlight level in range 0-255 and returns the actual level set.
// The requested level may be limited if its above the max_level limit.
//
// If the level is outside the range, the function has no effect
// and just returns the actual level set. If the backlight driver
@ -52,3 +56,8 @@ int backlight_set(int val);
//
// Returns 0 if the backlight driver is not initialized.
int backlight_get(void);
// Set maximal backlight limit, limits the requested level to max_level value.
//
// Returns 0 if the backlight driver is not initialized.
int backlight_set_max_level(int max_level);

54
core/embed/io/backlight/stm32u5/tps61062.c
View File

@ -47,11 +47,17 @@
typedef struct {
// Set if driver is initialized
bool initialized;
// Level requested (0-255)
int requested_level;
int current_level;
// Current step in range 0-32
int current_step;
// Max backlight level
int max_level;
DMA_HandleTypeDef dma;
TIM_HandleTypeDef tim;
@ -150,6 +156,10 @@ void backlight_init(backlight_action_t action) {
HAL_TIM_Base_Start(&drv->tim);
HAL_TIM_PWM_Start(&drv->tim, TIM_CHANNEL_1);
// Default no backlight max_level limit
drv->max_level = BACKLIGHT_MAX_LEVEL;
drv->requested_level = BACKLIGHT_MIN_LEVEL;
drv->initialized = true;
}
@ -186,16 +196,28 @@ int backlight_set(int val) {
return 0;
}
if (val < 0 || val > 255) {
// Requested level out of range
if (val < BACKLIGHT_MIN_LEVEL || val > BACKLIGHT_MAX_LEVEL) {
return drv->current_level;
}
if (val == drv->current_level) {
return val;
// Capture requested level.
drv->requested_level = val;
int requested_level_limited = drv->requested_level;
if (drv->requested_level > drv->max_level) {
requested_level_limited = drv->max_level;
}
drv->current_level = val;
int set_step = MAX_STEPS * val / 255;
// No action required
if (requested_level_limited == drv->current_level) {
return drv->current_level;
}
// New backlight level
drv->current_level = requested_level_limited;
int set_step = MAX_STEPS * drv->current_level / BACKLIGHT_MAX_LEVEL;
if (set_step == 0) {
backlight_shutdown();
@ -252,6 +274,28 @@ int backlight_get(void) {
return drv->current_level;
}
// Set maximal backlight level
int backlight_set_max_level(int max_level) {
backlight_driver_t *drv = &g_backlight_driver;
if (!drv->initialized) {
return 0;
}
if (max_level < BACKLIGHT_MIN_LEVEL) {
max_level = BACKLIGHT_MIN_LEVEL;
}
if (max_level > BACKLIGHT_MAX_LEVEL) {
max_level = BACKLIGHT_MAX_LEVEL;
}
drv->max_level = max_level;
backlight_set(drv->requested_level);
return drv->current_level;
}
static void backlight_control_up(uint32_t *data, int steps) {
for (int i = 0; i < steps; i++) {
data[i] = TIM_PULSE(BACKLIGHT_CONTROL_T_UP_US);