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 };
  75
  76 static const struct dw_hdmi_sym_term imx_sym_term[] = {
  77         /*pixelclk   symbol   term*/
  78         { 148500000, 0x800d, 0x0005 },
  79         { ~0UL,      0x0000, 0x0000 }
  80 };
  81
  82 static int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
  83 {
  84         struct device_node *np = hdmi->dev->of_node;
  85
  86         hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
  87         if (IS_ERR(hdmi->regmap)) {
  88                 dev_err(hdmi->dev, "Unable to get gpr\n");
  89                 return PTR_ERR(hdmi->regmap);
  90         }
  91
  92         return 0;
  93 }
  94
  95 static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
  96 {
  97 }
  98
  99 static bool dw_hdmi_imx_encoder_mode_fixup(struct drm_encoder *encoder,
 100                                            const struct drm_display_mode *mode,
 101                                            struct drm_display_mode *adj_mode)
 102 {
 103         return true;
 104 }
 105
 106 static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
 107                                          struct drm_display_mode *mode,
 108                                          struct drm_display_mode *adj_mode)
 109 {
 110 }
 111
 112 static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
 113 {
 114         struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
 115         int mux = imx_drm_encoder_get_mux_id(hdmi->dev->of_node, encoder);
 116
 117         regmap_update_bits(hdmi->regmap, IOMUXC_GPR3,
 118                            IMX6Q_GPR3_HDMI_MUX_CTL_MASK,
 119                            mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT);
 120 }
 121
 122 static void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
 123 {
 124         imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24);
 125 }
 126
 127 static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
 128         .mode_fixup = dw_hdmi_imx_encoder_mode_fixup,
 129         .mode_set   = dw_hdmi_imx_encoder_mode_set,
 130         .prepare    = dw_hdmi_imx_encoder_prepare,
 131         .commit     = dw_hdmi_imx_encoder_commit,
 132         .disable    = dw_hdmi_imx_encoder_disable,
 133 };
 134
 135 static struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
 136         .destroy = drm_encoder_cleanup,
 137 };
 138
 139 static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
 140         .mpll_cfg = imx_mpll_cfg,
 141         .cur_ctr  = imx_cur_ctr,
 142         .sym_term = imx_sym_term,
 143         .dev_type = IMX6Q_HDMI,
 144 };
 145
 146 static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
 147         .mpll_cfg = imx_mpll_cfg,
 148         .cur_ctr  = imx_cur_ctr,
 149         .sym_term = imx_sym_term,
 150         .dev_type = IMX6DL_HDMI,
 151 };
 152
 153 static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
 154         { .compatible = "fsl,imx6q-hdmi",
 155           .data = &imx6q_hdmi_drv_data
 156         }, {
 157           .compatible = "fsl,imx6dl-hdmi",
 158           .data = &imx6dl_hdmi_drv_data
 159         },
 160         {},
 161 };
 162 MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids);
 163
 164 static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 165                             void *data)
 166 {
 167         struct platform_device *pdev = to_platform_device(dev);
 168         const struct dw_hdmi_plat_data *plat_data;
 169         const struct of_device_id *match;
 170         struct drm_device *drm = data;
 171         struct drm_encoder *encoder;
 172         struct imx_hdmi *hdmi;
 173         struct resource *iores;
 174         int irq;
 175         int ret;
 176
 177         if (!pdev->dev.of_node)
 178                 return -ENODEV;
 179
 180         hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 181         if (!hdmi)
 182                 return -ENOMEM;
 183
 184         match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
 185         plat_data = match->data;
 186         hdmi->dev = &pdev->dev;
 187         encoder = &hdmi->encoder;
 188
 189         irq = platform_get_irq(pdev, 0);
 190         if (irq < 0)
 191                 return irq;
 192
 193         iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 194         if (!iores)
 195                 return -ENXIO;
 196
 197         platform_set_drvdata(pdev, hdmi);
 198
 199         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
 200         /*
 201          * If we failed to find the CRTC(s) which this encoder is
 202          * supposed to be connected to, it's because the CRTC has
 203          * not been registered yet.  Defer probing, and hope that
 204          * the required CRTC is added later.
 205          */
 206         if (encoder->possible_crtcs == 0)
 207                 return -EPROBE_DEFER;
 208
 209         ret = dw_hdmi_imx_parse_dt(hdmi);
 210         if (ret < 0)
 211                 return ret;
 212
 213         drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
 214         drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 215                          DRM_MODE_ENCODER_TMDS);
 216
 217         return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
 218 }
 219
 220 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 221                                void *data)
 222 {
 223         return dw_hdmi_unbind(dev, master, data);
 224 }
 225
 226 static const struct component_ops dw_hdmi_imx_ops = {
 227         .bind   = dw_hdmi_imx_bind,
 228         .unbind = dw_hdmi_imx_unbind,
 229 };
 230
 231 static int dw_hdmi_imx_probe(struct platform_device *pdev)
 232 {
 233         return component_add(&pdev->dev, &dw_hdmi_imx_ops);
 234 }
 235
 236 static int dw_hdmi_imx_remove(struct platform_device *pdev)
 237 {
 238         component_del(&pdev->dev, &dw_hdmi_imx_ops);
 239
 240         return 0;
 241 }
 242
 243 static struct platform_driver dw_hdmi_imx_platform_driver = {
 244         .probe  = dw_hdmi_imx_probe,
 245         .remove = dw_hdmi_imx_remove,
 246         .driver = {
 247                 .name = "dwhdmi-imx",
 248                 .of_match_table = dw_hdmi_imx_dt_ids,
 249         },
 250 };
 251
 252 module_platform_driver(dw_hdmi_imx_platform_driver);
 253
 254 MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
 255 MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
 256 MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension");
 257 MODULE_LICENSE("GPL");
 258 MODULE_ALIAS("platform:dwhdmi-imx");