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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 <video.h>
     13 #include <asm/hardware.h>
     14 #include <asm/io.h>
     15 #include "rk_vop.h"
     16 
     17 DECLARE_GLOBAL_DATA_PTR;
     18 
     19 static void rk3399_set_pin_polarity(struct udevice *dev,
     20 				    enum vop_modes mode, u32 polarity)
     21 {
     22 	struct rk_vop_priv *priv = dev_get_priv(dev);
     23 	struct rk3288_vop *regs = priv->regs;
     24 
     25 	/*
     26 	 * The RK3399 VOPs (v3.5 and v3.6) require a per-mode setting of
     27 	 * the polarity configuration (in ctrl1).
     28 	 */
     29 	switch (mode) {
     30 	case VOP_MODE_HDMI:
     31 		clrsetbits_le32(&regs->dsp_ctrl1,
     32 				M_RK3399_DSP_HDMI_POL,
     33 				V_RK3399_DSP_HDMI_POL(polarity));
     34 		break;
     35 
     36 	case VOP_MODE_EDP:
     37 		clrsetbits_le32(&regs->dsp_ctrl1,
     38 				M_RK3399_DSP_EDP_POL,
     39 				V_RK3399_DSP_EDP_POL(polarity));
     40 		break;
     41 
     42 	case VOP_MODE_MIPI:
     43 		clrsetbits_le32(&regs->dsp_ctrl1,
     44 				M_RK3399_DSP_MIPI_POL,
     45 				V_RK3399_DSP_MIPI_POL(polarity));
     46 		break;
     47 
     48 	case VOP_MODE_LVDS:
     49 		/* The RK3399 has neither parallel RGB nor LVDS output. */
     50 	default:
     51 		debug("%s: unsupported output mode %x\n", __func__, mode);
     52 	}
     53 }
     54 
     55 /*
     56  * Try some common regulators. We should really get these from the
     57  * device tree somehow.
     58  */
     59 static const char * const rk3399_regulator_names[] = {
     60 	"vcc33_lcd"
     61 };
     62 
     63 static int rk3399_vop_probe(struct udevice *dev)
     64 {
     65 	/* Before relocation we don't need to do anything */
     66 	if (!(gd->flags & GD_FLG_RELOC))
     67 		return 0;
     68 
     69 	/* Probe regulators required for the RK3399 VOP */
     70 	rk_vop_probe_regulators(dev, rk3399_regulator_names,
     71 				ARRAY_SIZE(rk3399_regulator_names));
     72 
     73 	return rk_vop_probe(dev);
     74 }
     75 
     76 struct rkvop_driverdata rk3399_lit_driverdata = {
     77 	.set_pin_polarity = rk3399_set_pin_polarity,
     78 };
     79 
     80 struct rkvop_driverdata rk3399_big_driverdata = {
     81 	.features = VOP_FEATURE_OUTPUT_10BIT,
     82 	.set_pin_polarity = rk3399_set_pin_polarity,
     83 };
     84 
     85 static const struct udevice_id rk3399_vop_ids[] = {
     86 	{ .compatible = "rockchip,rk3399-vop-big",
     87 	  .data = (ulong)&rk3399_big_driverdata },
     88 	{ .compatible = "rockchip,rk3399-vop-lit",
     89 	  .data = (ulong)&rk3399_lit_driverdata },
     90 	{ }
     91 };
     92 
     93 static const struct video_ops rk3399_vop_ops = {
     94 };
     95 
     96 U_BOOT_DRIVER(rk3399_vop) = {
     97 	.name	= "rk3399_vop",
     98 	.id	= UCLASS_VIDEO,
     99 	.of_match = rk3399_vop_ids,
    100 	.ops	= &rk3399_vop_ops,
    101 	.bind	= rk_vop_bind,
    102 	.probe	= rk3399_vop_probe,
    103 	.priv_auto_alloc_size	= sizeof(struct rk_vop_priv),
    104 };
    105