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bdk: di: correct samsung backlight set

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Now that vblank writes are fixed we can return to proper backlight set.

Additionally, account for the pwm smoothing when backlight is turned off. That's to avoid visible green tint glitches when display is also turned off.
This commit is contained in:
CTCaer 2022-05-08 04:53:13 +03:00
parent 969a49edba
commit 450d95e573
1 changed files with 30 additions and 20 deletions
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50
bdk/display/di.c
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@ -36,6 +36,7 @@
extern volatile nyx_storage_t *nyx_str;
static u32 _display_id = 0;
static u32 _dsi_bl = -1;
static bool _nx_aula = false;
static void _display_panel_and_hw_end(bool no_panel_deinit);
@ -524,6 +525,7 @@ void display_init()
DSI(_DSIREG(DSI_WR_DATA)) = 0x000051; // MIPI_DCS_SET_BRIGHTNESS 0000: 0%. FF07: 100%.
DSI(_DSIREG(DSI_TRIGGER)) = DSI_TRIGGER_HOST;
usleep(5000);
_dsi_bl = 0;
break;
case PANEL_JDI_XXX062M:
@ -627,25 +629,33 @@ void display_backlight(bool enable)
gpio_write(GPIO_PORT_V, GPIO_PIN_0, enable ? GPIO_HIGH : GPIO_LOW); // Backlight PWM GPIO.
}
void display_dsi_backlight_brightness(u32 brightness)
static void _display_dsi_backlight_brightness(u32 duty)
{
// Normalize brightness value by 82% and a base of 45 duty.
if (brightness)
brightness = (brightness * PANEL_OLED_BL_COEFF / 100) + PANEL_OLED_BL_OFFSET;
u16 bl_ctrl = byte_swap_16((u16)(brightness * 8));
display_dsi_vblank_write(MIPI_DCS_SET_BRIGHTNESS, 2, &bl_ctrl);
}
void display_pwm_backlight_brightness(u32 brightness, u32 step_delay)
{
u32 old_value = (PWM(PWM_CONTROLLER_PWM_CSR_0) >> 16) & 0xFF;
if (brightness == old_value)
if (_dsi_bl == duty)
return;
if (old_value < brightness)
// Convert duty to candela.
u32 candela = duty * PANEL_SM_BL_CANDELA_MAX / 255;
u16 bl_ctrl = byte_swap_16((u16)candela);
display_dsi_vblank_write(MIPI_DCS_SET_BRIGHTNESS, 2, &bl_ctrl);
// Wait for backlight to completely turn off. 6+1 frames.
if (!duty)
usleep(120000);
_dsi_bl = duty;
}
static void _display_pwm_backlight_brightness(u32 duty, u32 step_delay)
{
for (u32 i = old_value; i < brightness + 1; i++)
u32 old_value = (PWM(PWM_CONTROLLER_PWM_CSR_0) >> 16) & 0xFF;
if (duty == old_value)
return;
if (old_value < duty)
{
for (u32 i = old_value; i < duty + 1; i++)
{
PWM(PWM_CONTROLLER_PWM_CSR_0) = PWM_CSR_EN | (i << 16);
usleep(step_delay);
@ -653,13 +663,13 @@ void display_pwm_backlight_brightness(u32 brightness, u32 step_delay)
}
else
{
for (u32 i = old_value; i > brightness; i--)
for (u32 i = old_value; i > duty; i--)
{
PWM(PWM_CONTROLLER_PWM_CSR_0) = PWM_CSR_EN | (i << 16);
usleep(step_delay);
}
}
if (!brightness)
if (!duty)
PWM(PWM_CONTROLLER_PWM_CSR_0) = 0;
}
@ -669,9 +679,9 @@ void display_backlight_brightness(u32 brightness, u32 step_delay)
brightness = 255;
if (_display_id != PANEL_SAM_AMS699VC01)
display_pwm_backlight_brightness(brightness, step_delay);
_display_pwm_backlight_brightness(brightness, step_delay);
else
display_dsi_backlight_brightness(brightness);
_display_dsi_backlight_brightness(brightness);
}
u32 display_get_backlight_brightness()
@ -838,7 +848,7 @@ void display_color_screen(u32 color)
if (_display_id != PANEL_SAM_AMS699VC01)
display_backlight(true);
else
display_backlight_brightness(255, 0);
display_backlight_brightness(150, 0);
}
u32 *display_init_framebuffer_pitch()