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      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/hardware.h>
     15 #include <asm/io.h>
     16 #include <asm/arch/clock.h>
     17 #include <asm/arch/grf_rk3288.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 };
    109