diff --git a/Drivers/ili9341-module/bindings/ilitek,ili9341.yaml b/Drivers/ili9341-module/bindings/ilitek,ili9341.yaml
index 1588890d6..0d805b82b 100644
--- a/Drivers/ili9341-module/bindings/ilitek,ili9341.yaml
+++ b/Drivers/ili9341-module/bindings/ilitek,ili9341.yaml
@@ -53,6 +53,10 @@ properties:
     type: int
     default: 10
     description: Size of the internal SPI transaction queue
+  gamma-curve:
+    type: int
+    default: 1
+    description: Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up
   pin-dc:
     type: phandles
     required: true
diff --git a/Drivers/ili9341-module/include/drivers/ili9341.h b/Drivers/ili9341-module/include/drivers/ili9341.h
index 8c1b64a39..d7b105b5e 100644
--- a/Drivers/ili9341-module/include/drivers/ili9341.h
+++ b/Drivers/ili9341-module/include/drivers/ili9341.h
@@ -24,6 +24,8 @@ struct Ili9341Config {
     uint32_t bits_per_pixel;
     uint32_t pixel_clock_hz;
     uint8_t transaction_queue_depth;
+    // Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up.
+    uint8_t gamma_curve;
     struct GpioPinSpec pin_dc;
     struct GpioPinSpec pin_reset;
     bool reset_active_high;
diff --git a/Drivers/ili9341-module/source/ili9341.cpp b/Drivers/ili9341-module/source/ili9341.cpp
index 84d2cbeac..8971480dd 100644
--- a/Drivers/ili9341-module/source/ili9341.cpp
+++ b/Drivers/ili9341-module/source/ili9341.cpp
@@ -13,6 +13,7 @@
 
 #include <esp_err.h>
 #include <esp_lcd_io_spi.h>
+#include <esp_lcd_panel_commands.h>
 #include <esp_lcd_panel_io.h>
 #include <esp_lcd_panel_ops.h>
 #include <esp_lcd_ili9341.h>
@@ -25,6 +26,11 @@
 
 #define GET_CONFIG(device) (static_cast<const Ili9341Config*>((device)->config))
 
+// Maps gamma-curve devicetree index [0,3] to the MIPI DCS GAMSET (0x26) parameter value. Mirrors
+// the deprecated HAL's EspLcdSpiDisplay::setGammaCurve() (Drivers/EspLcdCompat) - note the
+// non-linear mapping, not index+1.
+static const uint8_t GAMMA_CURVE_VALUES[4] = { 0x01, 0x04, 0x02, 0x08 };
+
 struct Ili9341Internal {
     esp_lcd_panel_io_handle_t io_handle;
     esp_lcd_panel_handle_t panel_handle;
@@ -140,6 +146,7 @@ static error_t start(Device* device) {
     ok = ok && (!config->swap_xy || esp_lcd_panel_swap_xy(internal->panel_handle, true) == ESP_OK);
     ok = ok && ((!config->mirror_x && !config->mirror_y) || esp_lcd_panel_mirror(internal->panel_handle, config->mirror_x, config->mirror_y) == ESP_OK);
     ok = ok && (!config->invert_color || esp_lcd_panel_invert_color(internal->panel_handle, true) == ESP_OK);
+    ok = ok && (config->gamma_curve >= 4 || esp_lcd_panel_io_tx_param(internal->io_handle, LCD_CMD_GAMSET, &GAMMA_CURVE_VALUES[config->gamma_curve], 1) == ESP_OK);
     ok = ok && esp_lcd_panel_disp_on_off(internal->panel_handle, true) == ESP_OK;
 
     if (!ok) {
diff --git a/Drivers/st7789-i8080-module/bindings/sitronix,st7789-i8080.yaml b/Drivers/st7789-i8080-module/bindings/sitronix,st7789-i8080.yaml
index dbf57f2c5..fcc0e4585 100644
--- a/Drivers/st7789-i8080-module/bindings/sitronix,st7789-i8080.yaml
+++ b/Drivers/st7789-i8080-module/bindings/sitronix,st7789-i8080.yaml
@@ -49,6 +49,10 @@ properties:
     type: int
     default: 10
     description: Size of the internal transaction queue
+  gamma-curve:
+    type: int
+    default: 1
+    description: Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up
   pin-reset:
     type: phandles
     default: GPIO_PIN_SPEC_NONE
diff --git a/Drivers/st7789-i8080-module/include/drivers/st7789_i8080.h b/Drivers/st7789-i8080-module/include/drivers/st7789_i8080.h
index 1a59b9c23..c71b281ff 100644
--- a/Drivers/st7789-i8080-module/include/drivers/st7789_i8080.h
+++ b/Drivers/st7789-i8080-module/include/drivers/st7789_i8080.h
@@ -23,6 +23,8 @@ struct St7789I8080Config {
     bool bgr_order;
     uint32_t pixel_clock_hz;
     uint8_t transaction_queue_depth;
+    // Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up.
+    uint8_t gamma_curve;
     struct GpioPinSpec pin_reset;
     bool reset_active_high;
     // Optional reference to this display's backlight device, NULL if none.
diff --git a/Drivers/st7789-i8080-module/source/st7789_i8080.cpp b/Drivers/st7789-i8080-module/source/st7789_i8080.cpp
index 6e93bcc39..6d0d12ef4 100644
--- a/Drivers/st7789-i8080-module/source/st7789_i8080.cpp
+++ b/Drivers/st7789-i8080-module/source/st7789_i8080.cpp
@@ -12,6 +12,7 @@
 #include <tactility/log.h>
 
 #include <esp_err.h>
+#include <esp_lcd_panel_commands.h>
 #include <esp_lcd_panel_io.h>
 #include <esp_lcd_panel_ops.h>
 #include <esp_lcd_panel_st7789.h>
@@ -24,6 +25,11 @@
 #define TAG "ST7789I8080"
 #define GET_CONFIG(device) (static_cast<const St7789I8080Config*>((device)->config))
 
+// Maps gamma-curve devicetree index [0,3] to the MIPI DCS GAMSET (0x26) parameter value. Mirrors
+// the deprecated HAL's EspLcdSpiDisplay::setGammaCurve() (Drivers/EspLcdCompat) - note the
+// non-linear mapping, not index+1.
+static const uint8_t GAMMA_CURVE_VALUES[4] = { 0x01, 0x04, 0x02, 0x08 };
+
 namespace {
 
 // Panel bring-up commands beyond esp_lcd_panel_init()'s generic ST7789 sequence: gate/porch/power
@@ -179,6 +185,7 @@ static error_t start(Device* device) {
     ok = ok && (!config->swap_xy || esp_lcd_panel_swap_xy(internal->panel_handle, true) == ESP_OK);
     ok = ok && ((!config->mirror_x && !config->mirror_y) || esp_lcd_panel_mirror(internal->panel_handle, config->mirror_x, config->mirror_y) == ESP_OK);
     ok = ok && (!config->invert_color || esp_lcd_panel_invert_color(internal->panel_handle, true) == ESP_OK);
+    ok = ok && (config->gamma_curve >= 4 || esp_lcd_panel_io_tx_param(internal->io_handle, LCD_CMD_GAMSET, &GAMMA_CURVE_VALUES[config->gamma_curve], 1) == ESP_OK);
     ok = ok && esp_lcd_panel_disp_on_off(internal->panel_handle, true) == ESP_OK;
 
     if (!ok) {
diff --git a/Drivers/st7789-module/bindings/sitronix,st7789.yaml b/Drivers/st7789-module/bindings/sitronix,st7789.yaml
index ce89db639..a3f0d43ab 100644
--- a/Drivers/st7789-module/bindings/sitronix,st7789.yaml
+++ b/Drivers/st7789-module/bindings/sitronix,st7789.yaml
@@ -53,6 +53,10 @@ properties:
     type: int
     default: 10
     description: Size of the internal SPI transaction queue
+  gamma-curve:
+    type: int
+    default: 1
+    description: Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up
   pin-dc:
     type: phandles
     required: true
diff --git a/Drivers/st7789-module/include/drivers/st7789.h b/Drivers/st7789-module/include/drivers/st7789.h
index 87f53edf5..6358acacc 100644
--- a/Drivers/st7789-module/include/drivers/st7789.h
+++ b/Drivers/st7789-module/include/drivers/st7789.h
@@ -24,6 +24,8 @@ struct St7789Config {
     uint32_t bits_per_pixel;
     uint32_t pixel_clock_hz;
     uint8_t transaction_queue_depth;
+    // Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up.
+    uint8_t gamma_curve;
     struct GpioPinSpec pin_dc;
     struct GpioPinSpec pin_reset;
     bool reset_active_high;
diff --git a/Drivers/st7789-module/source/st7789.cpp b/Drivers/st7789-module/source/st7789.cpp
index 20a5bd8d4..c76742a7a 100644
--- a/Drivers/st7789-module/source/st7789.cpp
+++ b/Drivers/st7789-module/source/st7789.cpp
@@ -13,6 +13,7 @@
 
 #include <esp_err.h>
 #include <esp_lcd_io_spi.h>
+#include <esp_lcd_panel_commands.h>
 #include <esp_lcd_panel_io.h>
 #include <esp_lcd_panel_ops.h>
 #include <esp_lcd_panel_st7789.h>
@@ -25,6 +26,11 @@
 
 #define GET_CONFIG(device) (static_cast<const St7789Config*>((device)->config))
 
+// Maps gamma-curve devicetree index [0,3] to the MIPI DCS GAMSET (0x26) parameter value. Mirrors
+// the deprecated HAL's EspLcdSpiDisplay::setGammaCurve() (Drivers/EspLcdCompat) - note the
+// non-linear mapping, not index+1.
+static const uint8_t GAMMA_CURVE_VALUES[4] = { 0x01, 0x04, 0x02, 0x08 };
+
 struct St7789Internal {
     esp_lcd_panel_io_handle_t io_handle;
     esp_lcd_panel_handle_t panel_handle;
@@ -140,6 +146,7 @@ static error_t start(Device* device) {
     ok = ok && (!config->swap_xy || esp_lcd_panel_swap_xy(internal->panel_handle, true) == ESP_OK);
     ok = ok && ((!config->mirror_x && !config->mirror_y) || esp_lcd_panel_mirror(internal->panel_handle, config->mirror_x, config->mirror_y) == ESP_OK);
     ok = ok && (!config->invert_color || esp_lcd_panel_invert_color(internal->panel_handle, true) == ESP_OK);
+    ok = ok && (config->gamma_curve >= 4 || esp_lcd_panel_io_tx_param(internal->io_handle, LCD_CMD_GAMSET, &GAMMA_CURVE_VALUES[config->gamma_curve], 1) == ESP_OK);
     ok = ok && esp_lcd_panel_disp_on_off(internal->panel_handle, true) == ESP_OK;
 
     if (!ok) {