From c424fea5240edfd996fbd2f5d40f7f444c7325c3 Mon Sep 17 00:00:00 2001
From: rforro <38496829+rforro@users.noreply.github.com>
Date: Tue, 25 Feb 2025 00:45:45 +0100
Subject: [PATCH] ili9xxx: Add support for GC9D01N circle display (#8302)

---
 esphome/components/ili9xxx/display.py        |  1 +
 esphome/components/ili9xxx/ili9xxx_display.h |  5 ++
 esphome/components/ili9xxx/ili9xxx_init.h    | 59 ++++++++++++++++++++
 3 files changed, 65 insertions(+)

diff --git a/esphome/components/ili9xxx/display.py b/esphome/components/ili9xxx/display.py
index e3abb7e98c..14b7f15218 100644
--- a/esphome/components/ili9xxx/display.py
+++ b/esphome/components/ili9xxx/display.py
@@ -57,6 +57,7 @@ ColorOrder = display.display_ns.enum("ColorMode")
 
 MODELS = {
     "GC9A01A": ili9xxx_ns.class_("ILI9XXXGC9A01A", ILI9XXXDisplay),
+    "GC9D01N": ili9xxx_ns.class_("ILI9XXXGC9D01N", ILI9XXXDisplay),
     "M5STACK": ili9xxx_ns.class_("ILI9XXXM5Stack", ILI9XXXDisplay),
     "M5CORE": ili9xxx_ns.class_("ILI9XXXM5CORE", ILI9XXXDisplay),
     "TFT_2.4": ili9xxx_ns.class_("ILI9XXXILI9341", ILI9XXXDisplay),
diff --git a/esphome/components/ili9xxx/ili9xxx_display.h b/esphome/components/ili9xxx/ili9xxx_display.h
index 87d7c86e5c..0babcedc48 100644
--- a/esphome/components/ili9xxx/ili9xxx_display.h
+++ b/esphome/components/ili9xxx/ili9xxx_display.h
@@ -272,6 +272,11 @@ class ILI9XXXGC9A01A : public ILI9XXXDisplay {
   ILI9XXXGC9A01A() : ILI9XXXDisplay(INITCMD_GC9A01A, 240, 240) {}
 };
 
+class ILI9XXXGC9D01N : public ILI9XXXDisplay {
+ public:
+  ILI9XXXGC9D01N() : ILI9XXXDisplay(INITCMD_GC9D01N, 160, 160) {}
+};
+
 //-----------   ILI9XXX_24_TFT display --------------
 class ILI9XXXST7735 : public ILI9XXXDisplay {
  public:
diff --git a/esphome/components/ili9xxx/ili9xxx_init.h b/esphome/components/ili9xxx/ili9xxx_init.h
index b176680f43..f05b884be6 100644
--- a/esphome/components/ili9xxx/ili9xxx_init.h
+++ b/esphome/components/ili9xxx/ili9xxx_init.h
@@ -367,6 +367,65 @@ static const uint8_t PROGMEM INITCMD_GC9A01A[] = {
   0x00                  // End of list
 };
 
+static const uint8_t PROGMEM INITCMD_GC9D01N[] = {
+  // Enable Inter_command
+  0xFE, 0,          // Inter Register Enable 1 (FEh)
+  0xEF, 0,          // Inter Register Enable 2 (EFh)
+  // Inter_command is now enabled
+  0x80, 1, 0xFF,
+  0x81, 1, 0xFF,
+  0x82, 1, 0xFF,
+  0x83, 1, 0xFF,
+  0x84, 1, 0xFF,
+  0x85, 1, 0xFF,
+  0x86, 1, 0xFF,
+  0x87, 1, 0xFF,
+  0x88, 1, 0xFF,
+  0x89, 1, 0xFF,
+  0x8A, 1, 0xFF,
+  0x8B, 1, 0xFF,
+  0x8C, 1, 0xFF,
+  0x8D, 1, 0xFF,
+  0x8E, 1, 0xFF,
+  0x8F, 1, 0xFF,
+  0X3A, 1, 0x05,    // COLMOD: Pixel Format Set (3Ah) MCU interface, 16 bits / pixel
+  0xEC, 1, 0x01,    // Inversion (ECh) DINV=1+2H1V column for Dual Gate (BFh=0)
+                    // According to datasheet Inversion (ECh) value 0x01 isn't valid, but Lilygo uses it everywhere
+  0x74, 7, 0x02, 0x0E, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x98, 1, 0x3e,
+  0x99, 1, 0x3e,
+  0xB5, 2, 0x0D, 0x0D,    // Blanking Porch Control (B5h) VFP=14 VBP=14 HBP=Off
+  0x60, 4, 0x38, 0x0F, 0x79, 0x67,
+  0x61, 4, 0x38, 0x11, 0x79, 0x67,
+  0x64, 6, 0x38, 0x17, 0x71, 0x5F, 0x79, 0x67,
+  0x65, 6, 0x38, 0x13, 0x71, 0x5B, 0x79, 0x67,
+  0x6A, 2, 0x00, 0x00,
+  0x6C, 7, 0x22, 0x02, 0x22, 0x02, 0x22, 0x22, 0x50,
+  0x6E, 32, 0x03, 0x03, 0x01, 0x01, 0x00, 0x00, 0x0F, 0x0F,
+            0x0D, 0x0D, 0x0B, 0x0B, 0x09, 0x09, 0x00, 0x00,
+            0x00, 0x00, 0x0A, 0x0A, 0x0C, 0x0C, 0x0E, 0x0E,
+            0x10, 0x10, 0x00, 0x00, 0x02, 0x02, 0x04, 0x04,
+  0xBF, 1, 0x01,    // Dual-Single gate select (BFh) 01h = dual gate mode
+  0xF9, 1, 0x40,
+  0x9B, 5, 0x3B, 0x93, 0x33, 0x7F, 0x00,
+  0x7E, 1, 0x30,
+  0x70, 6, 0x0D, 0x02, 0x08, 0x0D, 0x02, 0x08,
+  0x71, 3, 0x0D, 0x02, 0x08,
+  0x91, 2, 0x0E, 0x09,
+  // Set VREG1A, VREG1B, VREG2A, VREG2B voltage
+  // According to datasheet set either 0xC3/0xC4 or 0xC9 only, but Lilygo sets both of them
+  0xC3, 5, 0x19, 0xC4, 0x19, 0xC9, 0x3C,
+  0xF0, 6, 0x53, 0x15, 0x0A, 0x04, 0x00, 0x3E,    // SET_GAMMA1 (F0h)
+  0xF1, 6, 0x56, 0xA8, 0x7F, 0x33, 0x34, 0x5F,    // SET_GAMMA2 (F1h)
+  0xF2, 6, 0x53, 0x15, 0x0A, 0x04, 0x00, 0x3A,    // SET_GAMMA3 (F2h)
+  0xF3, 6, 0x52, 0xA4, 0x7F, 0x33, 0x34, 0xDF,    // SET_GAMMA4 (F3h)
+  ILI9XXX_SLPOUT, 0,      // Sleep Out Mode (11h)
+  ILI9XXX_DELAY(10),
+  ILI9XXX_DISPON, 0,      // Display ON (29h)
+  ILI9XXX_DELAY(20),
+  0x00                    // End of list
+};
+
 static const uint8_t PROGMEM INITCMD_ST7735[] = {
     ILI9XXX_SWRESET, 0,         // Soft reset, then delay 10ms
     ILI9XXX_DELAY(10),