drivers/gpu/drm/verisilicon/vs_simple_enc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
   4  */
   5 #include <linux/version.h>
   6 #include <linux/component.h>
   7 #include <linux/of_device.h>
   8 #if KERNEL_VERSION(5, 5, 0) <= LINUX_VERSION_CODE
   9 #include <linux/module.h>
  10
  11 #include <drm/drm_bridge.h>
  12 #else
  13 #include <drm/drmP.h>
  14 #endif
  15
  16 #include <drm/drm_crtc_helper.h>
  17 #include <drm/drm_of.h>
  18 #include <linux/regmap.h>
  19 #include <linux/mfd/syscon.h>
  20
  21 #include "vs_crtc.h"
  22 #include "vs_simple_enc.h"
  23
  24 static const struct simple_encoder_priv hdmi_priv = {
  25         .encoder_type = DRM_MODE_ENCODER_TMDS
  26 };
  27
  28 static const struct simple_encoder_priv dsi_priv = {
  29         .encoder_type = DRM_MODE_ENCODER_DSI
  30 };
  31
  32 static const struct drm_encoder_funcs encoder_funcs = {
  33         .destroy = drm_encoder_cleanup
  34 };
  35
  36 static inline struct simple_encoder *to_simple_encoder(struct drm_encoder *enc)
  37 {
  38         return container_of(enc, struct simple_encoder, encoder);
  39 }
  40
  41 #if 0
  42 static int encoder_parse_dt(struct device *dev)
  43 {
  44         struct simple_encoder *simple = dev_get_drvdata(dev);
  45         int ret = 0;
  46         int cnt, i;
  47         u32 *vals;
  48         u32 *masks;
  49
  50         simple->dss_regmap = syscon_regmap_lookup_by_phandle(dev->of_node,
  51                                                 "verisilicon,dss-syscon");
  52
  53         if (IS_ERR(simple->dss_regmap)) {
  54                 if (PTR_ERR(simple->dss_regmap) != -ENODEV) {
  55                         dev_err(dev, "failed to get dss-syscon\n");
  56                         ret = PTR_ERR(simple->dss_regmap);
  57                         goto err;
  58                 }
  59                 simple->dss_regmap = NULL;
  60                 goto err;
  61         }
  62
  63         cnt = of_property_count_elems_of_size(dev->of_node,
  64                                 "verisilicon,mux-mask", 4);
  65         if (!cnt) {
  66                 ret = cnt;
  67                 goto err;
  68         }
  69
  70         simple->dss_regdatas = devm_kzalloc(dev,
  71                 sizeof(*simple->dss_regdatas) * cnt, GFP_KERNEL);
  72
  73         masks = kcalloc(cnt, sizeof(*masks), GFP_KERNEL);
  74         if (!masks) {
  75                 ret = -ENOMEM;
  76                 goto err;
  77         }
  78
  79         vals = kcalloc(cnt, sizeof(*vals), GFP_KERNEL);
  80         if (!vals) {
  81                 ret = -ENOMEM;
  82                 goto err_free_masks;
  83         }
  84
  85         ret = of_property_read_u32_array(
  86                         dev->of_node, "verisilicon,mux-mask", masks, cnt);
  87         if (ret)
  88                 goto err_free_vals;
  89
  90         ret = of_property_read_u32_array(
  91                         dev->of_node, "verisilicon,mux-val", vals, cnt);
  92         if (ret)
  93                 goto err_free_vals;
  94
  95         for (i = 0; i < cnt; i++) {
  96                 simple->dss_regdatas[i].mask = masks[i];
  97                 simple->dss_regdatas[i].value = vals[i];
  98         }
  99
 100 err_free_vals:
 101         kfree(vals);
 102 err_free_masks:
 103         kfree(masks);
 104 err:
 105         return ret;
 106 }
 107 #endif
 108
 109 #define DOM_VOUT_SYSCON_8                                                                       0x8U
 110 #define U0_LCD_DATA_MAPPING_DPI_DP_SEL_SHIFT                            0x2U
 111 #define U0_LCD_DATA_MAPPING_DPI_DP_SEL_MASK                                     0x4U
 112
 113 #define DOM_VOUT_SYSCON_4                                                                       0x4U
 114 #define U0_DISPLAY_PANEL_MUX_PANEL_SEL_SHIFT                            0x14U
 115 #define U0_DISPLAY_PANEL_MUX_PANEL_SEL_MASK                                     0x100000U
 116
 117 void encoder_atomic_enable(struct drm_encoder *encoder,
 118                                                 struct drm_atomic_state *state)
 119 {
 120         return;
 121 }
 122
 123 int encoder_atomic_check(struct drm_encoder *encoder,
 124                         struct drm_crtc_state *crtc_state,
 125                         struct drm_connector_state *conn_state)
 126 {
 127         struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(crtc_state);
 128         struct drm_connector *connector = conn_state->connector;
 129         int ret = 0;
 130 #if KERNEL_VERSION(5, 9, 0) <= LINUX_VERSION_CODE
 131         struct drm_bridge *first_bridge = drm_bridge_chain_get_first_bridge(encoder);
 132         struct drm_bridge_state *bridge_state = ERR_PTR(-EINVAL);
 133 #endif
 134
 135         vs_crtc_state->encoder_type = encoder->encoder_type;
 136
 137 #if KERNEL_VERSION(5, 9, 0) <= LINUX_VERSION_CODE
 138         if (first_bridge && first_bridge->funcs->atomic_duplicate_state)
 139                 bridge_state = drm_atomic_get_bridge_state(
 140                                            crtc_state->state, first_bridge);
 141
 142         if (IS_ERR(bridge_state)) {
 143                 if (connector->display_info.num_bus_formats)
 144                         vs_crtc_state->output_fmt = connector->display_info.bus_formats[0];
 145                 else
 146                         vs_crtc_state->output_fmt = MEDIA_BUS_FMT_FIXED;
 147         } else {
 148                 vs_crtc_state->output_fmt = bridge_state->input_bus_cfg.format;
 149         }
 150 #else
 151         if (connector->display_info.num_bus_formats)
 152                 vs_crtc_state->output_fmt = connector->display_info.bus_formats[0];
 153         else
 154                 vs_crtc_state->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
 155 #endif
 156
 157         switch (vs_crtc_state->output_fmt) {
 158         case MEDIA_BUS_FMT_FIXED:
 159         case MEDIA_BUS_FMT_RGB565_1X16:
 160         case MEDIA_BUS_FMT_RGB666_1X18:
 161         case MEDIA_BUS_FMT_RGB888_1X24:
 162         case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
 163         case MEDIA_BUS_FMT_RGB101010_1X30:
 164         case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
 165         case MEDIA_BUS_FMT_UYVY8_1X16:
 166         case MEDIA_BUS_FMT_YUV8_1X24:
 167         case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
 168         case MEDIA_BUS_FMT_UYVY10_1X20:
 169         case MEDIA_BUS_FMT_YUV10_1X30:
 170                 ret = 0;
 171                 break;
 172         default:
 173                 ret = -EINVAL;
 174                 break;
 175         }
 176
 177         /* If MEDIA_BUS_FMT_FIXED, set it to default value */
 178         if (vs_crtc_state->output_fmt == MEDIA_BUS_FMT_FIXED)
 179                 vs_crtc_state->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
 180
 181         return ret;
 182 }
 183
 184 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 185         .atomic_enable = encoder_atomic_enable,
 186         .atomic_check = encoder_atomic_check,
 187 };
 188
 189 static int encoder_bind(struct device *dev, struct device *master, void *data)
 190 {
 191
 192         struct drm_device *drm_dev = data;
 193         struct simple_encoder *simple = dev_get_drvdata(dev);
 194         struct drm_encoder *encoder;
 195         struct drm_bridge *bridge;
 196
 197         int ret;
 198
 199         encoder = &simple->encoder;
 200
 201         /* Encoder. */
 202
 203         ret = drm_encoder_init(drm_dev, encoder, &encoder_funcs,
 204                                    simple->priv->encoder_type, NULL);
 205         if (ret)
 206                 return ret;
 207
 208         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 209
 210         encoder->possible_crtcs =
 211                         drm_of_find_possible_crtcs(drm_dev, dev->of_node);
 212         encoder->possible_crtcs = 3;
 213
 214         /* output port is port1*/
 215
 216 #ifdef CONFIG_STARFIVE_DSI
 217         struct drm_panel *tmp_panel;
 218
 219         ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0,&tmp_panel, &bridge);
 220         if (ret){
 221                 printk("==no panel, %d\n",ret);
 222                 //dev_err_probe(dev, ret, "endpoint returns %d\n", ret);
 223                 goto err;
 224         }
 225         if (tmp_panel)
 226                 dev_err(dev, "found panel on endpoint\n");
 227 #else
 228         ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL, &bridge);
 229                 if (ret)
 230                         goto err;
 231 #endif
 232 #if KERNEL_VERSION(5, 7, 0) <= LINUX_VERSION_CODE
 233         ret = drm_bridge_attach(encoder, bridge, NULL, 0);
 234 #else
 235         ret = drm_bridge_attach(encoder, bridge, NULL);
 236 #endif
 237         if (ret)
 238                 goto err;
 239
 240         return 0;
 241 err:
 242         drm_encoder_cleanup(encoder);
 243
 244         return ret;
 245 }
 246
 247 static void encoder_unbind(struct device *dev, struct device *master,
 248                                   void *data)
 249 {
 250         struct simple_encoder *simple = dev_get_drvdata(dev);
 251
 252         drm_encoder_cleanup(&simple->encoder);
 253 }
 254
 255 static const struct component_ops encoder_component_ops = {
 256         .bind = encoder_bind,
 257         .unbind = encoder_unbind,
 258 };
 259
 260 static const struct of_device_id simple_encoder_dt_match[] = {
 261         { .compatible = "verisilicon,hdmi-encoder", .data = &hdmi_priv},
 262         { .compatible = "verisilicon,dp-encoder", .data = &hdmi_priv},
 263         { .compatible = "verisilicon,dsi-encoder", .data = &dsi_priv},
 264         {},
 265 };
 266 MODULE_DEVICE_TABLE(of, simple_encoder_dt_match);
 267
 268 static int encoder_probe(struct platform_device *pdev)
 269 {
 270         struct device *dev = &pdev->dev;
 271         struct simple_encoder *simple;
 272
 273         simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
 274         if (!simple)
 275                 return -ENOMEM;
 276
 277         simple->priv = of_device_get_match_data(dev);
 278
 279         simple->dev = dev;
 280
 281         dev_set_drvdata(dev, simple);
 282 #if 0
 283         ret = encoder_parse_dt(dev);
 284         if (ret)
 285                 return ret;
 286 #endif
 287         return component_add(dev, &encoder_component_ops);
 288 }
 289
 290 static int encoder_remove(struct platform_device *pdev)
 291 {
 292         struct device *dev = &pdev->dev;
 293
 294         component_del(dev, &encoder_component_ops);
 295
 296         dev_set_drvdata(dev, NULL);
 297
 298         return 0;
 299 }
 300
 301 struct platform_driver simple_encoder_driver = {
 302         .probe = encoder_probe,
 303         .remove = encoder_remove,
 304         .driver = {
 305                 .name = "vs-simple-encoder",
 306                 .of_match_table = of_match_ptr(simple_encoder_dt_match),
 307         },
 308 };
 309
 310 MODULE_DESCRIPTION("Simple Encoder Driver");
 311 MODULE_LICENSE("GPL v2");