drivers/gpu/drm/bridge/adv7511/adv7533.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2016, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/of_graph.h>
   7
   8 #include "adv7511.h"
   9
  10 static const struct reg_sequence adv7533_fixed_registers[] = {
  11         { 0x16, 0x20 },
  12         { 0x9a, 0xe0 },
  13         { 0xba, 0x70 },
  14         { 0xde, 0x82 },
  15         { 0xe4, 0x40 },
  16         { 0xe5, 0x80 },
  17 };
  18
  19 static const struct reg_sequence adv7533_cec_fixed_registers[] = {
  20         { 0x15, 0xd0 },
  21         { 0x17, 0xd0 },
  22         { 0x24, 0x20 },
  23         { 0x57, 0x11 },
  24         { 0x05, 0xc8 },
  25 };
  26
  27 static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
  28 {
  29         struct mipi_dsi_device *dsi = adv->dsi;
  30         struct drm_display_mode *mode = &adv->curr_mode;
  31         unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
  32         static const u8 clock_div_by_lanes[] = { 6, 4, 3 };     /* 2, 3, 4 lanes */
  33
  34         hsw = mode->hsync_end - mode->hsync_start;
  35         hfp = mode->hsync_start - mode->hdisplay;
  36         hbp = mode->htotal - mode->hsync_end;
  37         vsw = mode->vsync_end - mode->vsync_start;
  38         vfp = mode->vsync_start - mode->vdisplay;
  39         vbp = mode->vtotal - mode->vsync_end;
  40
  41         /* set pixel clock divider mode */
  42         regmap_write(adv->regmap_cec, 0x16,
  43                      clock_div_by_lanes[dsi->lanes - 2] << 3);
  44
  45         /* horizontal porch params */
  46         regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
  47         regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
  48         regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
  49         regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
  50         regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
  51         regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
  52         regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
  53         regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);
  54
  55         /* vertical porch params */
  56         regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
  57         regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
  58         regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
  59         regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
  60         regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
  61         regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
  62         regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
  63         regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
  64 }
  65
  66 void adv7533_dsi_power_on(struct adv7511 *adv)
  67 {
  68         struct mipi_dsi_device *dsi = adv->dsi;
  69
  70         if (adv->use_timing_gen)
  71                 adv7511_dsi_config_timing_gen(adv);
  72
  73         /* set number of dsi lanes */
  74         regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);
  75
  76         if (adv->use_timing_gen) {
  77                 /* reset internal timing generator */
  78                 regmap_write(adv->regmap_cec, 0x27, 0xcb);
  79                 regmap_write(adv->regmap_cec, 0x27, 0x8b);
  80                 regmap_write(adv->regmap_cec, 0x27, 0xcb);
  81         } else {
  82                 /* disable internal timing generator */
  83                 regmap_write(adv->regmap_cec, 0x27, 0x0b);
  84         }
  85
  86         /* enable hdmi */
  87         regmap_write(adv->regmap_cec, 0x03, 0x89);
  88         /* disable test mode */
  89         regmap_write(adv->regmap_cec, 0x55, 0x00);
  90
  91         regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
  92                               ARRAY_SIZE(adv7533_cec_fixed_registers));
  93 }
  94
  95 void adv7533_dsi_power_off(struct adv7511 *adv)
  96 {
  97         /* disable hdmi */
  98         regmap_write(adv->regmap_cec, 0x03, 0x0b);
  99         /* disable internal timing generator */
 100         regmap_write(adv->regmap_cec, 0x27, 0x0b);
 101 }
 102
 103 enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
 104                                         const struct drm_display_mode *mode)
 105 {
 106         struct mipi_dsi_device *dsi = adv->dsi;
 107         u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
 108
 109         /* Check max clock for either 7533 or 7535 */
 110         if (mode->clock > adv->info->max_mode_clock_khz)
 111                 return MODE_CLOCK_HIGH;
 112
 113         /* Check max clock for each lane */
 114         if (mode->clock * bpp > adv->info->max_lane_freq_khz * adv->num_dsi_lanes)
 115                 return MODE_CLOCK_HIGH;
 116
 117         return MODE_OK;
 118 }
 119
 120 int adv7533_patch_registers(struct adv7511 *adv)
 121 {
 122         return regmap_register_patch(adv->regmap,
 123                                      adv7533_fixed_registers,
 124                                      ARRAY_SIZE(adv7533_fixed_registers));
 125 }
 126
 127 int adv7533_patch_cec_registers(struct adv7511 *adv)
 128 {
 129         return regmap_register_patch(adv->regmap_cec,
 130                                     adv7533_cec_fixed_registers,
 131                                     ARRAY_SIZE(adv7533_cec_fixed_registers));
 132 }
 133
 134 int adv7533_attach_dsi(struct adv7511 *adv)
 135 {
 136         struct device *dev = &adv->i2c_main->dev;
 137         struct mipi_dsi_host *host;
 138         struct mipi_dsi_device *dsi;
 139         int ret = 0;
 140         const struct mipi_dsi_device_info info = { .type = "adv7533",
 141                                                    .channel = 0,
 142                                                    .node = NULL,
 143                                                  };
 144
 145         host = of_find_mipi_dsi_host_by_node(adv->host_node);
 146         if (!host)
 147                 return dev_err_probe(dev, -EPROBE_DEFER,
 148                                      "failed to find dsi host\n");
 149
 150         dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
 151         if (IS_ERR(dsi))
 152                 return dev_err_probe(dev, PTR_ERR(dsi),
 153                                      "failed to create dsi device\n");
 154
 155         adv->dsi = dsi;
 156
 157         dsi->lanes = adv->num_dsi_lanes;
 158         dsi->format = MIPI_DSI_FMT_RGB888;
 159         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
 160                           MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
 161
 162         ret = devm_mipi_dsi_attach(dev, dsi);
 163         if (ret < 0)
 164                 return dev_err_probe(dev, ret, "failed to attach dsi to host\n");
 165
 166         return 0;
 167 }
 168
 169 int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
 170 {
 171         u32 num_lanes;
 172
 173         of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
 174
 175         if (num_lanes < 2 || num_lanes > 4)
 176                 return -EINVAL;
 177
 178         adv->num_dsi_lanes = num_lanes;
 179
 180         adv->host_node = of_graph_get_remote_node(np, 0, 0);
 181         if (!adv->host_node)
 182                 return -ENODEV;
 183
 184         adv->use_timing_gen = !of_property_read_bool(np,
 185                                                 "adi,disable-timing-generator");
 186
 187         /* TODO: Check if these need to be parsed by DT or not */
 188         adv->rgb = true;
 189         adv->embedded_sync = false;
 190
 191         return 0;
 192 }