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

   1 /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
   2  *
   3  * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/component.h>
  12 #include <linux/mfd/syscon.h>
  13 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
  14 #include <drm/bridge/dw_hdmi.h>
  15 #include <video/imx-ipu-v3.h>
  16 #include <linux/regmap.h>
  17 #include <drm/drm_of.h>
  18 #include <drm/drmP.h>
  19 #include <drm/drm_crtc_helper.h>
  20 #include <drm/drm_edid.h>
  21 #include <drm/drm_encoder_slave.h>
  22
  23 #include "imx-drm.h"
  24
  25 struct imx_hdmi {
  26         struct device *dev;
  27         struct drm_encoder encoder;
  28         struct regmap *regmap;
  29 };
  30
  31 static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = {
  32         {
  33                 45250000, {
  34                         { 0x01e0, 0x0000 },
  35                         { 0x21e1, 0x0000 },
  36                         { 0x41e2, 0x0000 }
  37                 },
  38         }, {
  39                 92500000, {
  40                         { 0x0140, 0x0005 },
  41                         { 0x2141, 0x0005 },
  42                         { 0x4142, 0x0005 },
  43         },
  44         }, {
  45                 148500000, {
  46                         { 0x00a0, 0x000a },
  47                         { 0x20a1, 0x000a },
  48                         { 0x40a2, 0x000a },
  49                 },
  50         }, {
  51                 ~0UL, {
  52                         { 0x00a0, 0x000a },
  53                         { 0x2001, 0x000f },
  54                         { 0x4002, 0x000f },
  55                 },
  56         }
  57 };
  58
  59 static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
  60         /*      pixelclk     bpp8    bpp10   bpp12 */
  61         {
  62                 54000000, { 0x091c, 0x091c, 0x06dc },
  63         }, {
  64                 58400000, { 0x091c, 0x06dc, 0x06dc },
  65         }, {
  66                 72000000, { 0x06dc, 0x06dc, 0x091c },
  67         }, {
  68                 74250000, { 0x06dc, 0x0b5c, 0x091c },
  69         }, {
  70                 118800000, { 0x091c, 0x091c, 0x06dc },
  71         }, {
  72                 216000000, { 0x06dc, 0x0b5c, 0x091c },
  73         }, {
  74                 ~0UL, { 0x0000, 0x0000, 0x0000 },
  75         },
  76 };
  77
  78 static const struct dw_hdmi_sym_term imx_sym_term[] = {
  79         /*pixelclk   symbol   term*/
  80         { 148500000, 0x800d, 0x0005 },
  81         { ~0UL,      0x0000, 0x0000 }
  82 };
  83
  84 static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
  85 {
  86         struct device_node *np = hdmi->dev->of_node;
  87
  88         hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
  89         if (IS_ERR(hdmi->regmap)) {
  90                 dev_err(hdmi->dev, "Unable to get gpr\n");
  91                 return PTR_ERR(hdmi->regmap);
  92         }
  93
  94         return 0;
  95 }
  96
  97 static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
  98 {
  99 }
 100
 101 static bool dw_hdmi_imx_encoder_mode_fixup(struct drm_encoder *encoder,
 102                                            const struct drm_display_mode *mode,
 103                                            struct drm_display_mode *adj_mode)
 104 {
 105         return true;
 106 }
 107
 108 static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
 109                                          struct drm_display_mode *mode,
 110                                          struct drm_display_mode *adj_mode)
 111 {
 112 }
 113
 114 static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
 115 {
 116         struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
 117         int mux = imx_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder);
 118
 119         regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
 120                            IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
 121                            mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
 122 }
 123
 124 static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
 125 {
 126         imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24);
 127 }
 128
 129 static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
 130         .mode_fixup = dw_hdmi_imx_encoder_mode_fixup,
 131         .mode_set   = dw_hdmi_imx_encoder_mode_set,
 132         .prepare    = dw_hdmi_imx_encoder_prepare,
 133         .commit     = dw_hdmi_imx_encoder_commit,
 134         .disable    = dw_hdmi_imx_encoder_disable,
 135 };
 136
 137 static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
 138         .destroy = drm_encoder_cleanup,
 139 };
 140
 141 static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
 142                                                   struct drm_display_mode *mode)
 143 {
 144         if (mode->clock < 13500)
 145                 return MODE_CLOCK_LOW;
 146         if (mode->clock > 266000)
 147                 return MODE_CLOCK_HIGH;
 148
 149         return MODE_OK;
 150 }
 151
 152 static enum drm_mode_status imx6dl_hdmi_mode_valid(struct drm_connector *con,
 153                                                    struct drm_display_mode *mode)
 154 {
 155         if (mode->clock < 13500)
 156                 return MODE_CLOCK_LOW;
 157         if (mode->clock > 270000)
 158                 return MODE_CLOCK_HIGH;
 159
 160         return MODE_OK;
 161 }
 162
 163 static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
 164         .mpll_cfg   = imx_mpll_cfg,
 165         .cur_ctr    = imx_cur_ctr,
 166         .sym_term   = imx_sym_term,
 167         .dev_type   = IMX6Q_HDMI,
 168         .mode_valid = imx6q_hdmi_mode_valid,
 169 };
 170
 171 static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
 172         .mpll_cfg = imx_mpll_cfg,
 173         .cur_ctr  = imx_cur_ctr,
 174         .sym_term = imx_sym_term,
 175         .dev_type = IMX6DL_HDMI,
 176         .mode_valid = imx6dl_hdmi_mode_valid,
 177 };
 178
 179 static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
 180         { .compatible = "fsl,imx6q-hdmi",
 181           .data = &imx6q_hdmi_drv_data
 182         }, {
 183           .compatible = "fsl,imx6dl-hdmi",
 184           .data = &imx6dl_hdmi_drv_data
 185         },
 186         {},
 187 };
 188 MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
 189
 190 static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 191                             void *data)
 192 {
 193         struct platform_device *pdev = to_platform_device(dev);
 194         const struct dw_hdmi_plat_data *plat_data;
 195         const struct of_device_id *match;
 196         struct drm_device *drm = data;
 197         struct drm_encoder *encoder;
 198         struct imx_hdmi *hdmi;
 199         struct resource *iores;
 200         int irq;
 201         int ret;
 202
 203         if (!pdev->dev.of_node)
 204                 return -ENODEV;
 205
 206         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 207         if (!hdmi)
 208                 return -ENOMEM;
 209
 210         match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
 211         plat_data = match->data;
 212         hdmi->dev = &pdev->dev;
 213         encoder = &hdmi->encoder;
 214
 215         irq = platform_get_irq(pdev, 0);
 216         if (irq < 0)
 217                 return irq;
 218
 219         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 220         if (!iores)
 221                 return -ENXIO;
 222
 223         platform_set_drvdata(pdev, hdmi);
 224
 225         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
 226         /*
 227          * If we failed to find the CRTC(s) which this encoder is
 228          * supposed to be connected to, it's because the CRTC has
 229          * not been registered yet.  Defer probing, and hope that
 230          * the required CRTC is added later.
 231          */
 232         if (encoder->possible_crtcs == 0)
 233                 return -EPROBE_DEFER;
 234
 235         ret = dw_hdmi_imx_parse_dt(hdmi);
 236         if (ret < 0)
 237                 return ret;
 238
 239         drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
 240         drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 241                          DRM_MODE_ENCODER_TMDS);
 242
 243         return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
 244 }
 245
 246 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 247                                void *data)
 248 {
 249         return dw_hdmi_unbind(dev, master, data);
 250 }
 251
 252 static const struct component_ops dw_hdmi_imx_ops = {
 253         .bind   = dw_hdmi_imx_bind,
 254         .unbind = dw_hdmi_imx_unbind,
 255 };
 256
 257 static int dw_hdmi_imx_probe(struct platform_device *pdev)
 258 {
 259         return component_add(&pdev->dev, &dw_hdmi_imx_ops);
 260 }
 261
 262 static int dw_hdmi_imx_remove(struct platform_device *pdev)
 263 {
 264         component_del(&pdev->dev, &dw_hdmi_imx_ops);
 265
 266         return 0;
 267 }
 268
 269 static struct platform_driver dw_hdmi_imx_platform_driver = {
 270         .probe  = dw_hdmi_imx_probe,
 271         .remove = dw_hdmi_imx_remove,
 272         .driver = {
 273                 .name = "dwhdmi-imx",
 274                 .of_match_table = dw_hdmi_imx_dt_ids,
 275         },
 276 };
 277
 278 module_platform_driver(dw_hdmi_imx_platform_driver);
 279
 280 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
 281 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 282 MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
 283 MODULE_LICENSE("GPL");
 284 MODULE_ALIAS("platform:dwhdmi-imx");