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build/patch/kernel/archive/odroidxu4-5.13/0049-ODROID-XU4-drivers-fbtft-Add-fb_hktft32-module-for-H.patch

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From ee0bc8397ef4da60ce3f022bb54bdf710ef624e2 Mon Sep 17 00:00:00 2001
From: Yang Deokgyu <secugyu@gmail.com>
Date: Thu, 21 Nov 2019 15:17:36 +0900
Subject: [PATCH 049/109] ODROID-XU4: drivers/fbtft: Add fb_hktft32 module for
Hardkernel 3.2 inch TFT LCD
No longer use flexfb, fbtft_device that is deprecated since kernel 5.4.
Signed-off-by: Yang Deokgyu <secugyu@gmail.com>
Change-Id: Iebd014360f90eab5210722102d54c6169be5e28e
---
drivers/staging/fbtft/Kconfig | 7 ++
drivers/staging/fbtft/Makefile | 1 +
drivers/staging/fbtft/fb_hktft32.c | 156 +++++++++++++++++++++++++++++
3 files changed, 164 insertions(+)
create mode 100644 drivers/staging/fbtft/fb_hktft32.c
diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index b6cd416ebb26..408ef1a2f978 100644
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -213,3 +213,10 @@ config FB_TFT_HKTFT35
help
Generic Framebuffer support for the Hardkernel 3.5 inch TFT LCD
that uses the ILI9488 LCD Controller
+
+config FB_TFT_HKTFT32
+ tristate "FB driver for the Hardkernel 3.2 inch TFT LCD"
+ depends on FB_TFT
+ help
+ Generic Framebuffer support for the Hardkernel 3.2 inch TFT LCD
+ that uses the ILI9340 LCD Controller
diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index 3d41175663ed..34a5a14d1ab4 100644
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -38,3 +38,4 @@ obj-$(CONFIG_FB_TFT_UC1701) += fb_uc1701.o
obj-$(CONFIG_FB_TFT_UPD161704) += fb_upd161704.o
obj-$(CONFIG_FB_TFT_WATTEROTT) += fb_watterott.o
obj-$(CONFIG_FB_TFT_HKTFT35) += fb_hktft35.o
+obj-$(CONFIG_FB_TFT_HKTFT32) += fb_hktft32.o
diff --git a/drivers/staging/fbtft/fb_hktft32.c b/drivers/staging/fbtft/fb_hktft32.c
new file mode 100644
index 000000000000..33ac19603cad
--- /dev/null
+++ b/drivers/staging/fbtft/fb_hktft32.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * FB driver for the Hardkernel 3.2 inch TFT LCD
+ * that uses the ILI9340 LCD Controller
+ *
+ * Copyright (C) 2019 Yang Deokgyu
+ *
+ * Based on fb_ili9340.c by Noralf Tronnes
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <video/mipi_display.h>
+
+#include "fbtft.h"
+
+#define DRVNAME "fb_hktft32"
+#define WIDTH 240
+#define HEIGHT 320
+
+/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
+static int init_display(struct fbtft_par *par)
+{
+ par->fbtftops.reset(par);
+
+ write_reg(par, 0xEF, 0x03, 0x80, 0x02);
+ write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
+ write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
+ write_reg(par, 0xE8, 0x85, 0x00, 0x78);
+ write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
+ write_reg(par, 0xF7, 0x20);
+ write_reg(par, 0xEA, 0x00, 0x00);
+
+ /* Power Control 1 */
+ write_reg(par, 0xC0, 0x23);
+
+ /* Power Control 2 */
+ write_reg(par, 0xC1, 0x10);
+
+ /* VCOM Control 1 */
+ write_reg(par, 0xC5, 0x3e, 0x28);
+
+ /* VCOM Control 2 */
+ write_reg(par, 0xC7, 0x86);
+
+ /* COLMOD: Pixel Format Set */
+ /* 16 bits/pixel */
+ write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
+
+ /* Frame Rate Control */
+ /* Division ratio = fosc, Frame Rate = 79Hz */
+ write_reg(par, 0xB1, 0x00, 0x18);
+
+ /* Display Function Control */
+ write_reg(par, 0xB6, 0x08, 0x82, 0x27);
+
+ /* Gamma Function Disable */
+ write_reg(par, 0xF2, 0x00);
+
+ /* Gamma curve selection */
+ write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
+
+ /* Positive Gamma Correction */
+ write_reg(par, 0xE0,
+ 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
+ 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
+
+ /* Negative Gamma Correction */
+ write_reg(par, 0xE1,
+ 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
+ 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
+
+ write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
+
+ mdelay(120);
+
+ write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
+
+ return 0;
+}
+
+static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
+{
+ write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
+ xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
+
+ write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
+ ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
+
+ write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
+}
+
+#define ILI9340_MADCTL_MV 0x20
+#define ILI9340_MADCTL_MX 0x40
+#define ILI9340_MADCTL_MY 0x80
+static int set_var(struct fbtft_par *par)
+{
+ u8 val;
+
+ switch (par->info->var.rotate) {
+ case 270:
+ val = ILI9340_MADCTL_MV;
+ break;
+ case 180:
+ val = ILI9340_MADCTL_MY;
+ break;
+ case 90:
+ val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
+ break;
+ default:
+ val = ILI9340_MADCTL_MX;
+ break;
+ }
+ /* Memory Access Control */
+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val | (par->bgr << 3));
+
+ return 0;
+}
+
+static void reset(struct fbtft_par *par)
+{
+ if (!par->gpio.reset)
+ return;
+ fbtft_par_dbg(DEBUG_RESET, par, "%s()\n", __func__);
+ gpiod_set_value_cansleep(par->gpio.reset, 0);
+ usleep_range(20, 40);
+ gpiod_set_value_cansleep(par->gpio.reset, 1);
+ msleep(120);
+}
+
+static struct fbtft_display display = {
+ .regwidth = 8,
+ .buswidth = 8,
+ .width = WIDTH,
+ .height = HEIGHT,
+ .fbtftops = {
+ .init_display = init_display,
+ .set_addr_win = set_addr_win,
+ .set_var = set_var,
+ .reset = reset,
+ },
+};
+
+FBTFT_REGISTER_DRIVER(DRVNAME, "odroid,hktft32", &display);
+
+MODULE_ALIAS("spi:" DRVNAME);
+MODULE_ALIAS("platform:" DRVNAME);
+MODULE_ALIAS("spi:hktft32");
+MODULE_ALIAS("platform:hktft32");
+
+MODULE_DESCRIPTION("FB driver for the Hardkernel 3.2 inch TFT LCD uses the ILI9340 LCD Controller");
+MODULE_AUTHOR("Yang Deokgyu");
+MODULE_LICENSE("GPL");
--
2.25.1
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