LV_DISP_USE_RST

Allows to not allocate a GPIO for display reset: some may have that pin tied or attached to a Power management IC.

Supersedes PR from @usedbytes doing same but only for IL9341, this is for all supported displays.

lvgl_tft/EVE_commands.c

@@ -144,7 +144,7 @@ void DELAY_MS(uint16_t ms)
 	vTaskDelay(ms / portTICK_PERIOD_MS);
 }
 
-
+#if EVE_USE_PDN
 void EVE_pdn_set(void)
 {
 	gpio_set_level(EVE_PDN, 0);	/* Power-Down low */
@@ -155,7 +155,7 @@ void EVE_pdn_clear(void)
 {
 	gpio_set_level(EVE_PDN, 1);	/* Power-Down high */
 }
-
+#endif
 
 void spi_acquire()
 {
@@ -841,11 +841,13 @@ uint8_t EVE_init(void)
 	uint8_t chipid = 0;
 	uint16_t timeout = 0;
 
+#if EVE_USE_PDN
 	EVE_pdn_set();
 	DELAY_MS(6); /* minimum time for power-down is 5ms */
 
 	EVE_pdn_clear();
 	DELAY_MS(21); /* minimum time to allow from rising PD_N to first access is 20ms */
+#endif
 
 	/*	EVE_cmdWrite(EVE_CORERST,0); */ /* reset, only required for warm-start if PowerDown line is not used */
 

lvgl_tft/EVE_commands.h

@@ -39,8 +39,12 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #define BLOCK_TRANSFER_SIZE 3840		// block transfer size when write data to CMD buffer
 
 void DELAY_MS(uint16_t ms);
+
+#if EVE_USE_PDN
 void EVE_pdn_set(void);
 void EVE_pdn_clear(void);
+#endif
+
 void spi_acquire();
 void spi_release();
 

lvgl_tft/EVE_config.h

@@ -49,6 +49,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR TH
 #define EVE_MOSI	    DISP_SPI_MOSI				    // green
 #define EVE_CS 		    DISP_SPI_CS					    // blue
 #define EVE_PDN		    CONFIG_LV_DISP_PIN_RST	// grey
+#define EVE_USE_PDN		CONFIG_LV_DISP_USE_RST
 
 #define SPI_TRANSER_SIZE (DISP_BUF_SIZE * (LV_COLOR_DEPTH / 8))
 

lvgl_tft/FT81x.c

@@ -262,9 +262,15 @@ void TFT_bitmap_display(void)
 
 void FT81x_init(void)
 {
+#if EVE_USE_PDN
 	gpio_pad_select_gpio(EVE_PDN);
+#endif
+
 	gpio_set_level(EVE_CS, 1);
+
+#if EVE_USE_PDN
 	gpio_set_direction(EVE_PDN, GPIO_MODE_OUTPUT);
+#endif
 
 	spi_acquire();
 	

lvgl_tft/GC9A01.c

@@ -124,18 +124,24 @@ void GC9A01_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(GC9A01_DC);
 	gpio_set_direction(GC9A01_DC, GPIO_MODE_OUTPUT);
+
+#if GC9A01_USE_RST
         gpio_pad_select_gpio(GC9A01_RST);
 	gpio_set_direction(GC9A01_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if GC9A01_ENABLE_BACKLIGHT_CONTROL
     gpio_pad_select_gpio(GC9A01_BCKL);
     gpio_set_direction(GC9A01_BCKL, GPIO_MODE_OUTPUT);
 #endif
+
+#if GC9A01_USE_RST
 	//Reset the display
 	gpio_set_level(GC9A01_RST, 0);
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(GC9A01_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "Initialization.");
 

lvgl_tft/GC9A01.h

@@ -27,6 +27,7 @@ extern "C" {
  *********************/
 #define GC9A01_DC       CONFIG_LV_DISP_PIN_DC
 #define GC9A01_RST      CONFIG_LV_DISP_PIN_RST
+#define GC9A01_USE_RST  CONFIG_LV_DISP_USE_RST
 #define GC9A01_BCKL     CONFIG_LV_DISP_PIN_BCKL
 
 #define GC9A01_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL

lvgl_tft/Kconfig

@@ -900,8 +900,21 @@ menu "LVGL TFT Display controller"
             help
                 Configure the display DC pin here.
 
+        config LV_DISP_USE_RST
+            bool "Use a GPIO for resetting the display" if LV_TFT_DISPLAY_PROTOCOL_SPI
+            default y
+            help
+                Enable display reset control. Set this if the reset pin of the
+                display is connected to the host. If this is not set, then it is
+                the user's responsibility to ensure that the display is reset
+                before initialisation.
+                You may want to disable this option because the reset pin is not
+                connected, or is connected to an external component such as the
+                power management IC.
+
         config LV_DISP_PIN_RST
             int "GPIO for Reset" if LV_TFT_DISPLAY_PROTOCOL_SPI && !LV_DISP_ST7789_SOFT_RESET
+            depends on LV_DISP_USE_RST
             range 0 39 if IDF_TARGET_ESP32
             range 0 43 if IDF_TARGET_ESP32S2
 

lvgl_tft/hx8357.c

@@ -162,19 +162,24 @@ void hx8357_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(HX8357_DC);
 	gpio_set_direction(HX8357_DC, GPIO_MODE_OUTPUT);
+
+#if HX8357_USE_RST
         gpio_pad_select_gpio(HX8357_RST);
 	gpio_set_direction(HX8357_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if HX8357_ENABLE_BACKLIGHT_CONTROL
         gpio_pad_select_gpio(HX8357_BCKL);
 	gpio_set_direction(HX8357_BCKL, GPIO_MODE_OUTPUT);
 #endif
 
+#if HX8357_USE_RST
 	//Reset the display
 	gpio_set_level(HX8357_RST, 0);
 	vTaskDelay(10 / portTICK_RATE_MS);
 	gpio_set_level(HX8357_RST, 1);
 	vTaskDelay(120 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "Initialization.");
 

lvgl_tft/hx8357.h

@@ -37,6 +37,7 @@ extern "C" {
  *********************/
 #define HX8357_DC       CONFIG_LV_DISP_PIN_DC
 #define HX8357_RST      CONFIG_LV_DISP_PIN_RST
+#define HX8357_USE_RST  CONFIG_LV_DISP_USE_RST
 #define HX8357_BCKL     CONFIG_LV_DISP_PIN_BCKL
 
 #define HX8357_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL

lvgl_tft/il3820.c

@@ -198,16 +198,22 @@ void il3820_init(void)
     /* Initialize non-SPI GPIOs */
     gpio_pad_select_gpio(IL3820_DC_PIN);
     gpio_set_direction(IL3820_DC_PIN, GPIO_MODE_OUTPUT);
+
+#if IL3820_USE_RST
     gpio_pad_select_gpio(IL3820_RST_PIN);
     gpio_set_direction(IL3820_RST_PIN, GPIO_MODE_OUTPUT);
+#endif
+
     gpio_pad_select_gpio(IL3820_BUSY_PIN);
     gpio_set_direction(IL3820_BUSY_PIN,  GPIO_MODE_INPUT);
 
+#if IL3820_USE_RST
     /* Harware reset */
     gpio_set_level( IL3820_RST_PIN, 0);
     vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
     gpio_set_level( IL3820_RST_PIN, 1);
     vTaskDelay(IL3820_RESET_DELAY / portTICK_RATE_MS);
+#endif
 
     /* Software reset */
     il3820_write_cmd(IL3820_CMD_SW_RESET, NULL, 0);

lvgl_tft/il3820.h

@@ -28,6 +28,7 @@ extern "C"
 
 #define IL3820_DC_PIN           CONFIG_LV_DISP_PIN_DC
 #define IL3820_RST_PIN          CONFIG_LV_DISP_PIN_RST
+#define IL3820_USE_RST          CONFIG_LV_DISP_USE_RST
 #define IL3820_BUSY_PIN         CONFIG_LV_DISP_PIN_BUSY
 #define IL3820_BUSY_LEVEL       1
 

lvgl_tft/ili9341.c

@@ -93,18 +93,23 @@ void ili9341_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(ILI9341_DC);
 	gpio_set_direction(ILI9341_DC, GPIO_MODE_OUTPUT);
+#if ILI9341_USE_RST
         gpio_pad_select_gpio(ILI9341_RST);
 	gpio_set_direction(ILI9341_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if ILI9341_ENABLE_BACKLIGHT_CONTROL
     gpio_pad_select_gpio(ILI9341_BCKL);
     gpio_set_direction(ILI9341_BCKL, GPIO_MODE_OUTPUT);
 #endif
+
+#if ILI9341_USE_RST
 	//Reset the display
 	gpio_set_level(ILI9341_RST, 0);
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(ILI9341_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "Initialization.");
 

lvgl_tft/ili9341.h

@@ -26,6 +26,7 @@ extern "C" {
  *      DEFINES
  *********************/
 #define ILI9341_DC        CONFIG_LV_DISP_PIN_DC
+#define ILI9341_USE_RST   CONFIG_LV_DISP_USE_RST
 #define ILI9341_RST       CONFIG_LV_DISP_PIN_RST
 #define ILI9341_BCKL      CONFIG_LV_DISP_PIN_BCKL
 

lvgl_tft/ili9481.c

@@ -76,19 +76,24 @@ void ili9481_init(void)
     //Initialize non-SPI GPIOs
     gpio_pad_select_gpio(ILI9481_DC);
     gpio_set_direction(ILI9481_DC, GPIO_MODE_OUTPUT);
+
+#if ILI9481_USE_RST
     gpio_pad_select_gpio(ILI9481_RST);
     gpio_set_direction(ILI9481_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if ILI9481_ENABLE_BACKLIGHT_CONTROL
     gpio_pad_select_gpio(ILI9481_BCKL);
     gpio_set_direction(ILI9481_BCKL, GPIO_MODE_OUTPUT);
 #endif
 
+#if ILI9481_USE_RST
     //Reset the display
     gpio_set_level(ILI9481_RST, 0);
     vTaskDelay(100 / portTICK_RATE_MS);
     gpio_set_level(ILI9481_RST, 1);
     vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
     ESP_LOGI(TAG, "ILI9481 initialization.");
 

lvgl_tft/ili9481.h

@@ -27,6 +27,7 @@ extern "C" {
  *********************/
 #define ILI9481_DC        CONFIG_LV_DISP_PIN_DC
 #define ILI9481_RST       CONFIG_LV_DISP_PIN_RST
+#define ILI9481_USE_RST   CONFIG_LV_DISP_USE_RST
 #define ILI9481_BCKL      CONFIG_LV_DISP_PIN_BCKL
 
 #define ILI9481_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL

lvgl_tft/ili9486.c

@@ -78,19 +78,24 @@ void ili9486_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(ILI9486_DC);
 	gpio_set_direction(ILI9486_DC, GPIO_MODE_OUTPUT);
+
+#if ILI9486_USE_RST
         gpio_pad_select_gpio(ILI9486_RST);
 	gpio_set_direction(ILI9486_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if ILI9486_ENABLE_BACKLIGHT_CONTROL
     gpio_pad_select_gpio(ILI9486_BCKL);
     gpio_set_direction(ILI9486_BCKL, GPIO_MODE_OUTPUT);
 #endif
 
+#if ILI9486_USE_RST
 	//Reset the display
 	gpio_set_level(ILI9486_RST, 0);
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(ILI9486_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "ILI9486 Initialization.");
 

lvgl_tft/ili9486.h

@@ -27,6 +27,7 @@ extern "C" {
  *********************/
 #define ILI9486_DC      CONFIG_LV_DISP_PIN_DC
 #define ILI9486_RST     CONFIG_LV_DISP_PIN_RST
+#define ILI9486_USE_RST CONFIG_LV_DISP_USE_RST
 #define ILI9486_BCKL    CONFIG_LV_DISP_PIN_BCKL
 
 #define ILI9486_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL

lvgl_tft/ili9488.c

@@ -78,19 +78,24 @@ void ili9488_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(ILI9488_DC);
 	gpio_set_direction(ILI9488_DC, GPIO_MODE_OUTPUT);
+
+#if ILI9488_USE_RST
         gpio_pad_select_gpio(ILI9488_RST);
 	gpio_set_direction(ILI9488_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if ILI9488_ENABLE_BACKLIGHT_CONTROL
         gpio_pad_select_gpio(ILI9488_BCKL);
 	gpio_set_direction(ILI9488_BCKL, GPIO_MODE_OUTPUT);
 #endif
 
+#if ILI9488_USE_RST
 	//Reset the display
 	gpio_set_level(ILI9488_RST, 0);
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(ILI9488_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "ILI9488 initialization.");
 

lvgl_tft/ili9488.h

@@ -27,6 +27,7 @@ extern "C" {
  *********************/
 #define ILI9488_DC      CONFIG_LV_DISP_PIN_DC
 #define ILI9488_RST     CONFIG_LV_DISP_PIN_RST
+#define ILI9488_USE_RST CONFIG_LV_DISP_USE_RST
 #define ILI9488_BCKL    CONFIG_LV_DISP_PIN_BCKL
 
 #define ILI9488_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL

lvgl_tft/ra8875.c

@@ -159,18 +159,24 @@ void ra8875_init(void)
 #endif
 
     // Initialize non-SPI GPIOs
+
+#if RA8875_USE_RST
     gpio_pad_select_gpio(RA8875_RST);
     gpio_set_direction(RA8875_RST, GPIO_MODE_OUTPUT);
+#endif
+
 #ifdef CONFIG_LV_DISP_PIN_BCKL
     gpio_pad_select_gpio(CONFIG_LV_DISP_PIN_BCKL);
     gpio_set_direction(CONFIG_LV_DISP_PIN_BCKL, GPIO_MODE_OUTPUT);
 #endif
 
+#if RA8875_USE_RST
     // Reset the RA8875
     gpio_set_level(RA8875_RST, 0);
     vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
     gpio_set_level(RA8875_RST, 1);
     vTaskDelay(DIV_ROUND_UP(100, portTICK_RATE_MS));
+#endif
 
     // Initalize RA8875 clocks (SPI must be decelerated before initializing clocks)
     disp_spi_change_device_speed(SPI_CLOCK_SPEED_SLOW_HZ);

lvgl_tft/ra8875.h

@@ -25,6 +25,7 @@ extern "C" {
  *      DEFINES
  *********************/
 #define RA8875_RST      CONFIG_LV_DISP_PIN_RST
+#define RA8875_USE_RST  CONFIG_LV_DISP_USE_RST
 
 // System & Configuration Registers
 #define RA8875_REG_PWRR   (0x01)     // Power and Display Control Register (PWRR)

lvgl_tft/sh1107.c

@@ -94,6 +94,8 @@ void sh1107_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(SH1107_DC);
 	gpio_set_direction(SH1107_DC, GPIO_MODE_OUTPUT);
+
+#if SH1107_USE_RST
         gpio_pad_select_gpio(SH1107_RST);
 	gpio_set_direction(SH1107_RST, GPIO_MODE_OUTPUT);
 
@@ -102,6 +104,7 @@ void sh1107_init(void)
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(SH1107_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	//Send all the commands
 	uint16_t cmd = 0;

lvgl_tft/sh1107.h

@@ -27,6 +27,7 @@ extern "C" {
  *********************/
 #define SH1107_DC       CONFIG_LV_DISP_PIN_DC
 #define SH1107_RST      CONFIG_LV_DISP_PIN_RST
+#define SH1107_USE_RST  CONFIG_LV_DISP_USE_RST
 
 /**********************
  *      TYPEDEFS

lvgl_tft/st7735s.c

@@ -99,6 +99,8 @@ void st7735s_init(void)
 	//Initialize non-SPI GPIOs
         gpio_pad_select_gpio(ST7735S_DC);
 	gpio_set_direction(ST7735S_DC, GPIO_MODE_OUTPUT);
+
+#if ST7735S_USE_RST
         gpio_pad_select_gpio(ST7735S_RST);
 	gpio_set_direction(ST7735S_RST, GPIO_MODE_OUTPUT);
 
@@ -107,6 +109,7 @@ void st7735s_init(void)
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(ST7735S_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "ST7735S initialization.");
 

lvgl_tft/st7735s.h

@@ -27,6 +27,7 @@ extern "C" {
 
 #define ST7735S_DC       CONFIG_LV_DISP_PIN_DC
 #define ST7735S_RST      CONFIG_LV_DISP_PIN_RST
+#define ST7735S_USE_RST  CONFIG_LV_DISP_USE_RST
 
 #define AXP192_SDA   CONFIG_LV_AXP192_PIN_SDA
 #define AXP192_SCL   CONFIG_LV_AXP192_PIN_SCL

lvgl_tft/st7789.c

@@ -91,7 +91,7 @@ void st7789_init(void)
     gpio_pad_select_gpio(ST7789_DC);
     gpio_set_direction(ST7789_DC, GPIO_MODE_OUTPUT);
 
-#if !defined(CONFIG_LV_DISP_ST7789_SOFT_RESET)
+#if !defined(ST7789_SOFT_RST)
     gpio_pad_select_gpio(ST7789_RST);
     gpio_set_direction(ST7789_RST, GPIO_MODE_OUTPUT);
 #endif
@@ -102,7 +102,7 @@ void st7789_init(void)
 #endif
 
     //Reset the display
-#if !defined(CONFIG_LV_DISP_ST7789_SOFT_RESET)
+#if !defined(ST7789_SOFT_RST)
     gpio_set_level(ST7789_RST, 0);
     vTaskDelay(100 / portTICK_RATE_MS);
     gpio_set_level(ST7789_RST, 1);

lvgl_tft/st7789.h

@@ -25,6 +25,15 @@ extern "C"
 #define ST7789_RST      CONFIG_LV_DISP_PIN_RST
 #define ST7789_BCKL     CONFIG_LV_DISP_PIN_BCKL
 
+#if CONFIG_LV_DISP_USE_RST
+  #if CONFIG_LV_DISP_ST7789_SOFT_RESET
+    #define ST7789_SOFT_RST
+  #endif
+#else
+  #define ST7789_SOFT_RST
+#endif
+
+
 #define ST7789_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL
 #define ST7789_INVERT_COLORS            CONFIG_LV_INVERT_COLORS
 

lvgl_tft/st7796s.c

@@ -94,18 +94,24 @@ void st7796s_init(void)
 	//Initialize non-SPI GPIOs
 	gpio_pad_select_gpio(ST7796S_DC);
 	gpio_set_direction(ST7796S_DC, GPIO_MODE_OUTPUT);
+
+#if ST7796S_USE_RST
 	gpio_pad_select_gpio(ST7796S_RST);
 	gpio_set_direction(ST7796S_RST, GPIO_MODE_OUTPUT);
+#endif
 
 #if ST7796S_ENABLE_BACKLIGHT_CONTROL
 	gpio_pad_select_gpio(ST7796S_BCKL);
 	gpio_set_direction(ST7796S_BCKL, GPIO_MODE_OUTPUT);
 #endif
+
+#if ST7796S_USE_RST
 	//Reset the display
 	gpio_set_level(ST7796S_RST, 0);
 	vTaskDelay(100 / portTICK_RATE_MS);
 	gpio_set_level(ST7796S_RST, 1);
 	vTaskDelay(100 / portTICK_RATE_MS);
+#endif
 
 	ESP_LOGI(TAG, "Initialization.");
 

lvgl_tft/st7796s.h

@@ -28,6 +28,7 @@ extern "C"
  *********************/
 #define ST7796S_DC      CONFIG_LV_DISP_PIN_DC
 #define ST7796S_RST     CONFIG_LV_DISP_PIN_RST
+#define ST7796S_USE_RST CONFIG_LV_DISP_USE_RST
 #define ST7796S_BCKL    CONFIG_LV_DISP_PIN_BCKL
 
 #define ST7796S_ENABLE_BACKLIGHT_CONTROL CONFIG_LV_ENABLE_BACKLIGHT_CONTROL