board/ge/mx53ppd/mx53ppd_video.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2017 General Electric Company
   4  *
   5  * Based on board/freescale/mx53loco/mx53loco_video.c:
   6  *
   7  * Copyright (C) 2012 Freescale Semiconductor, Inc.
   8  * Fabio Estevam <fabio.estevam@freescale.com>
   9  */
  10
  11 #include <dm.h>
  12 #include <linux/list.h>
  13 #include <asm/arch/iomux-mx53.h>
  14 #include <asm/mach-imx/video.h>
  15 #include <linux/fb.h>
  16 #include <ipu_pixfmt.h>
  17 #include <asm/arch/crm_regs.h>
  18 #include <asm/arch/imx-regs.h>
  19 #include <asm/io.h>
  20 #include <panel.h>
  21
  22 static int detect_lcd(struct display_info_t const *dev)
  23 {
  24         return 1;
  25 }
  26
  27 static void lcd_enable(void)
  28 {
  29         struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
  30         struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
  31
  32         /* Set LDB_DI0 as clock source for IPU_DI0 */
  33         clrsetbits_le32(&mxc_ccm->cscmr2,
  34                         MXC_CCM_CSCMR2_DI0_CLK_SEL_MASK,
  35                         MXC_CCM_CSCMR2_DI0_CLK_SEL(
  36                                 MXC_CCM_CSCMR2_DI0_CLK_SEL_LDB_DI0_CLK));
  37
  38         /* Turn on IPU LDB DI0 clocks */
  39         setbits_le32(&mxc_ccm->CCGR6, MXC_CCM_CCGR6_LDB_DI0(3));
  40
  41         /* Turn on IPU DI0 clocks */
  42         setbits_le32(&mxc_ccm->CCGR6, MXC_CCM_CCGR6_IPU_DI0(3));
  43
  44         /* Configure LDB */
  45         writel(IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG |
  46                 IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT |
  47                 IOMUXC_GPR2_LVDS_CH0_MODE_ENABLED_DI0,
  48                 &iomux->gpr[2]);
  49 }
  50
  51 static void do_enable_backlight(struct display_info_t const *dev)
  52 {
  53         struct udevice *panel;
  54         int ret;
  55
  56         lcd_enable();
  57
  58         ret = uclass_get_device(UCLASS_PANEL, 0, &panel);
  59         if (ret) {
  60                 printf("Could not find panel: %d\n", ret);
  61                 return;
  62         }
  63
  64         panel_set_backlight(panel, 100);
  65         panel_enable_backlight(panel);
  66 }
  67
  68 struct display_info_t const displays[] = {
  69         {
  70                 .bus    = -1,
  71                 .addr   = -1,
  72                 .pixfmt = IPU_PIX_FMT_RGB24,
  73                 .detect = detect_lcd,
  74                 .enable = do_enable_backlight,
  75                 .mode = {
  76                         .name           = "NV-SPWGRGB888",
  77                         .refresh        = 60,
  78                         .xres           = 800,
  79                         .yres           = 480,
  80                         .pixclock       = 15384,
  81                         .left_margin    = 16,
  82                         .right_margin   = 210,
  83                         .upper_margin   = 10,
  84                         .lower_margin   = 22,
  85                         .hsync_len      = 30,
  86                         .vsync_len      = 13,
  87                         .sync           = FB_SYNC_EXT,
  88                         .vmode          = FB_VMODE_NONINTERLACED
  89                 }
  90         }
  91 };
  92
  93 size_t display_count = ARRAY_SIZE(displays);