drivers/video/rockchip/rk3288_vop.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2017 Theobroma Systems Design und Consulting GmbH
   4  * Copyright (c) 2015 Google, Inc
   5  * Copyright 2014 Rockchip Inc.
   6  */
   7
   8 #include <common.h>
   9 #include <display.h>
  10 #include <dm.h>
  11 #include <regmap.h>
  12 #include <syscon.h>
  13 #include <video.h>
  14 #include <asm/io.h>
  15 #include <asm/arch-rockchip/clock.h>
  16 #include <asm/arch-rockchip/grf_rk3288.h>
  17 #include <asm/arch-rockchip/hardware.h>
  18 #include "rk_vop.h"
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 static void rk3288_set_pin_polarity(struct udevice *dev,
  23                                     enum vop_modes mode, u32 polarity)
  24 {
  25         struct rk_vop_priv *priv = dev_get_priv(dev);
  26         struct rk3288_vop *regs = priv->regs;
  27
  28         /* The RK3328 VOP (v3.1) has its polarity configuration in ctrl0 */
  29         clrsetbits_le32(&regs->dsp_ctrl0,
  30                         M_DSP_DCLK_POL | M_DSP_DEN_POL |
  31                         M_DSP_VSYNC_POL | M_DSP_HSYNC_POL,
  32                         V_DSP_PIN_POL(polarity));
  33 }
  34
  35 static void rk3288_set_io_vsel(struct udevice *dev)
  36 {
  37         struct rk3288_grf *grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
  38
  39         /* lcdc(vop) iodomain select 1.8V */
  40         rk_setreg(&grf->io_vsel, 1 << 0);
  41 }
  42
  43 /*
  44  * Try some common regulators. We should really get these from the
  45  * device tree somehow.
  46  */
  47 static const char * const rk3288_regulator_names[] = {
  48         "vcc18_lcd",
  49         "VCC18_LCD",
  50         "vdd10_lcd_pwren_h",
  51         "vdd10_lcd",
  52         "VDD10_LCD",
  53         "vcc33_lcd"
  54 };
  55
  56 static int rk3288_vop_probe(struct udevice *dev)
  57 {
  58         /* Before relocation we don't need to do anything */
  59         if (!(gd->flags & GD_FLG_RELOC))
  60                 return 0;
  61
  62         /* Set the LCDC(vop) iodomain to 1.8V */
  63         rk3288_set_io_vsel(dev);
  64
  65         /* Probe regulators required for the RK3288 VOP */
  66         rk_vop_probe_regulators(dev, rk3288_regulator_names,
  67                                 ARRAY_SIZE(rk3288_regulator_names));
  68
  69         return rk_vop_probe(dev);
  70 }
  71
  72 static int rk_vop_remove(struct udevice *dev)
  73 {
  74         struct rk_vop_priv *priv = dev_get_priv(dev);
  75         struct rk3288_vop *regs = priv->regs;
  76
  77         setbits_le32(&regs->sys_ctrl, V_STANDBY_EN(1));
  78
  79         /* wait frame complete (60Hz) to enter standby */
  80         mdelay(17);
  81
  82         return 0;
  83 }
  84
  85 struct rkvop_driverdata rk3288_driverdata = {
  86         .features = VOP_FEATURE_OUTPUT_10BIT,
  87         .set_pin_polarity = rk3288_set_pin_polarity,
  88 };
  89
  90 static const struct udevice_id rk3288_vop_ids[] = {
  91         { .compatible = "rockchip,rk3288-vop",
  92           .data = (ulong)&rk3288_driverdata },
  93         { }
  94 };
  95
  96 static const struct video_ops rk3288_vop_ops = {
  97 };
  98
  99 U_BOOT_DRIVER(rk_vop) = {
 100         .name   = "rk3288_vop",
 101         .id     = UCLASS_VIDEO,
 102         .of_match = rk3288_vop_ids,
 103         .ops    = &rk3288_vop_ops,
 104         .bind   = rk_vop_bind,
 105         .probe  = rk3288_vop_probe,
 106         .remove = rk_vop_remove,
 107         .priv_auto_alloc_size   = sizeof(struct rk_vop_priv),
 108 };