drivers/gpu/drm/imx/dw_hdmi-imx.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
   3  *
   4  * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
   5  */
   6
   7 #include <linux/component.h>
   8 #include <linux/mfd/syscon.h>
   9 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/regmap.h>
  13
  14 #include <video/imx-ipu-v3.h>
  15
  16 #include <drm/bridge/dw_hdmi.h>
  17 #include <drm/drm_atomic_helper.h>
  18 #include <drm/drm_bridge.h>
  19 #include <drm/drm_edid.h>
  20 #include <drm/drm_encoder.h>
  21 #include <drm/drm_managed.h>
  22 #include <drm/drm_of.h>
  23 #include <drm/drm_simple_kms_helper.h>
  24
  25 #include "imx-drm.h"
  26
  27 struct imx_hdmi;
  28
  29 struct imx_hdmi_encoder {
  30         struct drm_encoder encoder;
  31         struct imx_hdmi *hdmi;
  32 };
  33
  34 struct imx_hdmi {
  35         struct device *dev;
  36         struct drm_bridge *bridge;
  37         struct dw_hdmi *hdmi;
  38         struct regmap *regmap;
  39 };
  40
  41 static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
  42 {
  43         return container_of(e, struct imx_hdmi_encoder, encoder)->hdmi;
  44 }
  45
  46 static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
  47         {
  48                 45250000, {
  49                         { 0x01e0, 0x0000 },
  50                         { 0x21e1, 0x0000 },
  51                         { 0x41e2, 0x0000 }
  52                 },
  53         }, {
  54                 92500000, {
  55                         { 0x0140, 0x0005 },
  56                         { 0x2141, 0x0005 },
  57                         { 0x4142, 0x0005 },
  58         },
  59         }, {
  60                 148500000, {
  61                         { 0x00a0, 0x000a },
  62                         { 0x20a1, 0x000a },
  63                         { 0x40a2, 0x000a },
  64                 },
  65         }, {
  66                 216000000, {
  67                         { 0x00a0, 0x000a },
  68                         { 0x2001, 0x000f },
  69                         { 0x4002, 0x000f },
  70                 },
  71         }, {
  72                 ~0UL, {
  73                         { 0x0000, 0x0000 },
  74                         { 0x0000, 0x0000 },
  75                         { 0x0000, 0x0000 },
  76                 },
  77         }
  78 };
  79
  80 static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
  81         /*      pixelclk     bpp8    bpp10   bpp12 */
  82         {
  83                 54000000, { 0x091c, 0x091c, 0x06dc },
  84         }, {
  85                 58400000, { 0x091c, 0x06dc, 0x06dc },
  86         }, {
  87                 72000000, { 0x06dc, 0x06dc, 0x091c },
  88         }, {
  89                 74250000, { 0x06dc, 0x0b5c, 0x091c },
  90         }, {
  91                 118800000, { 0x091c, 0x091c, 0x06dc },
  92         }, {
  93                 216000000, { 0x06dc, 0x0b5c, 0x091c },
  94         }, {
  95                 ~0UL, { 0x0000, 0x0000, 0x0000 },
  96         },
  97 };
  98
  99 /*
 100  * Resistance term 133Ohm Cfg
 101  * PREEMP config 0.00
 102  * TX/CK level 10
 103  */
 104 static const struct dw_hdmi_phy_config imx_phy_config[] = {
 105         /*pixelclk   symbol   term   vlev */
 106         { 216000000, 0x800d, 0x0005, 0x01ad},
 107         { ~0UL,      0x0000, 0x0000, 0x0000}
 108 };
 109
 110 static void dw_hdmi_imx_encoder_enable(struct drm_encoder *encoder)
 111 {
 112         struct imx_hdmi *hdmi = enc_to_imx_hdmi(encoder);
 113         int mux = drm_of_encoder_active_port_id(hdmi->dev->of_node, encoder);
 114
 115         regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
 116                            IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
 117                            mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
 118 }
 119
 120 static int dw_hdmi_imx_atomic_check(struct drm_encoder *encoder,
 121                                     struct drm_crtc_state *crtc_state,
 122                                     struct drm_connector_state *conn_state)
 123 {
 124         struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
 125
 126         imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 127         imx_crtc_state->di_hsync_pin = 2;
 128         imx_crtc_state->di_vsync_pin = 3;
 129
 130         return 0;
 131 }
 132
 133 static const struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
 134         .enable     = dw_hdmi_imx_encoder_enable,
 135         .atomic_check = dw_hdmi_imx_atomic_check,
 136 };
 137
 138 static enum drm_mode_status
 139 imx6q_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
 140                       const struct drm_display_info *info,
 141                       const struct drm_display_mode *mode)
 142 {
 143         if (mode->clock < 13500)
 144                 return MODE_CLOCK_LOW;
 145         /* FIXME: Hardware is capable of 266MHz, but setup data is missing. */
 146         if (mode->clock > 216000)
 147                 return MODE_CLOCK_HIGH;
 148
 149         return MODE_OK;
 150 }
 151
 152 static enum drm_mode_status
 153 imx6dl_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
 154                        const struct drm_display_info *info,
 155                        const struct drm_display_mode *mode)
 156 {
 157         if (mode->clock < 13500)
 158                 return MODE_CLOCK_LOW;
 159         /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */
 160         if (mode->clock > 216000)
 161                 return MODE_CLOCK_HIGH;
 162
 163         return MODE_OK;
 164 }
 165
 166 static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
 167         .mpll_cfg   = imx_mpll_cfg,
 168         .cur_ctr    = imx_cur_ctr,
 169         .phy_config = imx_phy_config,
 170         .mode_valid = imx6q_hdmi_mode_valid,
 171 };
 172
 173 static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
 174         .mpll_cfg = imx_mpll_cfg,
 175         .cur_ctr  = imx_cur_ctr,
 176         .phy_config = imx_phy_config,
 177         .mode_valid = imx6dl_hdmi_mode_valid,
 178 };
 179
 180 static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
 181         { .compatible = "fsl,imx6q-hdmi",
 182           .data = &imx6q_hdmi_drv_data
 183         }, {
 184           .compatible = "fsl,imx6dl-hdmi",
 185           .data = &imx6dl_hdmi_drv_data
 186         },
 187         {},
 188 };
 189 MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
 190
 191 static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 192                             void *data)
 193 {
 194         struct drm_device *drm = data;
 195         struct imx_hdmi_encoder *hdmi_encoder;
 196         struct drm_encoder *encoder;
 197         int ret;
 198
 199         hdmi_encoder = drmm_simple_encoder_alloc(drm, struct imx_hdmi_encoder,
 200                                                  encoder, DRM_MODE_ENCODER_TMDS);
 201         if (IS_ERR(hdmi_encoder))
 202                 return PTR_ERR(hdmi_encoder);
 203
 204         hdmi_encoder->hdmi = dev_get_drvdata(dev);
 205         encoder = &hdmi_encoder->encoder;
 206
 207         ret = imx_drm_encoder_parse_of(drm, encoder, dev->of_node);
 208         if (ret)
 209                 return ret;
 210
 211         drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
 212
 213         return drm_bridge_attach(encoder, hdmi_encoder->hdmi->bridge, NULL, 0);
 214 }
 215
 216 static const struct component_ops dw_hdmi_imx_ops = {
 217         .bind   = dw_hdmi_imx_bind,
 218 };
 219
 220 static int dw_hdmi_imx_probe(struct platform_device *pdev)
 221 {
 222         struct device_node *np = pdev->dev.of_node;
 223         const struct of_device_id *match = of_match_node(dw_hdmi_imx_dt_ids, np);
 224         struct imx_hdmi *hdmi;
 225         int ret;
 226
 227         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 228         if (!hdmi)
 229                 return -ENOMEM;
 230
 231         platform_set_drvdata(pdev, hdmi);
 232         hdmi->dev = &pdev->dev;
 233
 234         hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
 235         if (IS_ERR(hdmi->regmap)) {
 236                 dev_err(hdmi->dev, "Unable to get gpr\n");
 237                 return PTR_ERR(hdmi->regmap);
 238         }
 239
 240         hdmi->hdmi = dw_hdmi_probe(pdev, match->data);
 241         if (IS_ERR(hdmi->hdmi))
 242                 return PTR_ERR(hdmi->hdmi);
 243
 244         hdmi->bridge = of_drm_find_bridge(np);
 245         if (!hdmi->bridge) {
 246                 dev_err(hdmi->dev, "Unable to find bridge\n");
 247                 dw_hdmi_remove(hdmi->hdmi);
 248                 return -ENODEV;
 249         }
 250
 251         ret = component_add(&pdev->dev, &dw_hdmi_imx_ops);
 252         if (ret)
 253                 dw_hdmi_remove(hdmi->hdmi);
 254
 255         return ret;
 256 }
 257
 258 static int dw_hdmi_imx_remove(struct platform_device *pdev)
 259 {
 260         struct imx_hdmi *hdmi = platform_get_drvdata(pdev);
 261
 262         component_del(&pdev->dev, &dw_hdmi_imx_ops);
 263         dw_hdmi_remove(hdmi->hdmi);
 264
 265         return 0;
 266 }
 267
 268 static struct platform_driver dw_hdmi_imx_platform_driver = {
 269         .probe  = dw_hdmi_imx_probe,
 270         .remove = dw_hdmi_imx_remove,
 271         .driver = {
 272                 .name = "dwhdmi-imx",
 273                 .of_match_table = dw_hdmi_imx_dt_ids,
 274         },
 275 };
 276
 277 module_platform_driver(dw_hdmi_imx_platform_driver);
 278
 279 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
 280 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 281 MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
 282 MODULE_LICENSE("GPL");
 283 MODULE_ALIAS("platform:dwhdmi-imx");