lvgl: Add IPS parameters to ILI9341 driver

Some ILI9341 displays are IPS not TFT and they require different configuration. This adds syscfg value to use configuration suitable for IPS displays base on ILI9341 controller. Signed-off-by: Jerzy Kasenberg <jerzy@apache.org>
kasjer · Oct 2, 2024 · ac06e77 · ac06e77
1 parent f4a8906
commit ac06e77
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diff --git a/hw/drivers/display/lvgl/tft/ili9341/src/ili9341.c b/hw/drivers/display/lvgl/tft/ili9341/src/ili9341.c
@@ -159,6 +159,7 @@ LCD_SEQUENCE(init_cmds)
         1, ILI9341_SWRESET,
         LCD_SEQUENCE_DELAY(5),
 #endif
+#if MYNEWT_VAL(ILI9341_IPS) == 0
         1, ILI9341_DISPOFF,
         4, ILI9341_PWCTRLB, 0x00, 0x83, 0x30,
         5, ILI9341_PWSEQCTRL, 0x64, 0x03, 0x12, 0x81,
@@ -177,6 +178,29 @@ LCD_SEQUENCE(init_cmds)
         2, ILI9341_GAMSET, 01,
         16, ILI9341_PGAMCTRL, 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87, 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00,
         16, ILI9341_NGAMCTRL, 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78, 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f,
+#elif MYNEWT_VAL(ILI9341_IPS) == 1
+        1, ILI9341_DISPOFF,
+        4, ILI9341_PWCTRLB, 0x00, 0xC1, 0x30,
+        5, ILI9341_PWSEQCTRL, 0x64, 0x03, 0x12, 0x81,
+        4, ILI9341_TIMECTRLA_INT, 0x85, 0x00, 0x78,
+        6, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02,
+        2, ILI9341_PUMPRATIO, 0x20,
+        3, ILI9341_TIMECTRLB, 0x00, 0x00,
+        2, ILI9341_PWCTRL1, 0x13, /* VRH[5:0] */
+        2, ILI9341_PWCTRL2, 0x13, /* SAP[2:0];BT[3:0] */
+        3, ILI9341_VMCTRL1, 0x1C, 0x35,
+        2, ILI9341_VMCTRL2, 0xC8,
+        1, ILI9341_DINVON,
+        2, ILI9341_MADCTL, MADCTL_BGR | MADCTL_MX,
+        2, ILI9341_PIXSET, 0x55,
+        3, ILI9341_IFCTL, 0x01, 0x30,
+        3, ILI9341_FRMCTR1, 0x00, 0x1B,
+        /* positive gamma correction */
+        2, ILI9341_GAM3CTRL, 0x00,
+        2, ILI9341_GAMSET, 0x01,
+        16, ILI9341_PGAMCTRL, 0x0F, 0x35, 0x31, 0x0B, 0x0E, 0x06, 0x49, 0xA7, 0x33, 0x07, 0x0F, 0x03, 0x0C, 0x0A, 0x00,
+        16, ILI9341_NGAMCTRL, 0x00, 0x0A, 0x0F, 0x04, 0x11, 0x08, 0x36, 0x58, 0x4D, 0x07, 0x10, 0x0C, 0x32, 0x34, 0x0F,
+#endif
         5, ILI9341_CASET, 0x00, 0x00, 0x00, 0xEF,
         5, ILI9341_PASET, 0x00, 0x00, 0x01, 0x3F,
         1, ILI9341_TEON,

diff --git a/hw/drivers/display/lvgl/tft/ili9341/syscfg.yml b/hw/drivers/display/lvgl/tft/ili9341/syscfg.yml
@@ -17,6 +17,12 @@
 #
 
 syscfg.defs:
+    ILI9341_IPS:
+        description: >
+            Use configuration for IPS display.
+            IPS displays require different register values to show
+            correct colors.
+        value: 0
 
 syscfg.vals:
     LVGL_DISPLAY_HORIZONTAL_RESOLUTION: 240