mipi-dbi: add MIPI DBI LCD init sequence packages

Add a package directory for MIPI DBI LCD controller init sequences,
loaded as firmware by the panel-mipi-dbi kernel driver.

Initial package is for the Ubiquiti UniFi Travel Router (ubnt,utr)
LCD display.

Signed-off-by: Matt Eaton <git@divinehawk.com>
Link: https://github.com/openwrt/openwrt/pull/22740
Signed-off-by: Robert Marko <robimarko@gmail.com>

package/firmware/mipi-dbi/Makefile

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=mipi-dbi
+PKG_RELEASE:=1
+
+PKG_LICENSE:=GPL-2.0-or-later
+PKG_LICENSE_FILES:=
+
+PKG_MAINTAINER:=Matt Eaton <linux@divinehawk.com>
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/mipi-dbi-default
+  SECTION:=firmware
+  CATEGORY:=Firmware
+endef
+
+define Build/Compile
+endef
+
+# From https://github.com/notro/panel-mipi-dbi
+# mipi-dbi-cmd ubnt,utr-lcd.bin ubnt,utr-lcd.txt
+
+define Package/mipi-dbi-ubnt-utr
+  $(Package/mipi-dbi-default)
+  TITLE:=MIPI DBI LCD init sequence for Ubiquiti UniFi Travel Router
+  DEPENDS:=@TARGET_ipq40xx
+endef
+
+define Package/mipi-dbi-ubnt-utr/install
+	$(INSTALL_DIR) $(1)/lib/firmware
+	$(INSTALL_DATA) ./files/ubnt,utr-lcd.bin $(1)/lib/firmware/
+endef
+
+$(eval $(call BuildPackage,mipi-dbi-ubnt-utr))

package/firmware/mipi-dbi/files/ubnt,utr-lcd.txt

@@ -0,0 +1,16 @@
+command 0x11                          # Sleep Out — exits low-power mode and enables display logic
+delay 120                             # Stabilization delay after sleep-out
+command 0x3A 0x55                     # Pixel format: RGB565 (16-bit color)
+command 0x36 0xC0                     # MADCTL: orientation / mirroring / RGB order
+command 0xB2 0x0C 0x0C 0x00 0x33 0x33 # Porch control — frame timing (porch widths)
+command 0xB7 0x35                     # Gate control — gate driver timing
+command 0xBB 0x32                     # VCOM setting — common voltage reference
+command 0xC2 0x01                     # Power control enable
+command 0xC3 0x19                     # VRH — regulator high-side voltage level
+command 0xC4 0x20                     # VDV/low-power bias control
+command 0xC6 0x0F                     # Frame rate control
+command 0xD0 0xA4 0xA1                # Power control 1 — internal power circuits
+command 0xE0 0xD0 0x08 0x0E 0x09 0x09 0x05 0x31 0x33 0x48 0x17 0x14 0x15 0x31 0x34  # Positive gamma curve
+command 0xE1 0xD0 0x08 0x0E 0x09 0x09 0x15 0x31 0x33 0x48 0x17 0x14 0x15 0x31 0x34  # Negative gamma curve
+command 0x21                          # Display inversion ON (polarity swap)
+command 0x29                          # Display ON