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 #ifdef CONFIG_STARFIVE_DSI
 200         struct drm_panel *tmp_panel;
 201 #endif
 202
 203         encoder = &simple->encoder;
 204
 205         /* Encoder. */
 206         dev_info(dev,"encoder_bind begin\n");
 207
 208         ret = drm_encoder_init(drm_dev, encoder, &encoder_funcs,
 209                                    simple->priv->encoder_type, NULL);
 210         if (ret)
 211                 return ret;
 212
 213         drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 214
 215         encoder->possible_crtcs =
 216                         drm_of_find_possible_crtcs(drm_dev, dev->of_node);
 217         encoder->possible_crtcs = 2;
 218
 219         /* output port is port1*/
 220
 221 #ifdef CONFIG_STARFIVE_DSI
 222         ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0,&tmp_panel, &bridge);
 223         if (ret){
 224                 printk("==no panel, %d\n",ret);
 225                 //dev_err_probe(dev, ret, "endpoint returns %d\n", ret);
 226                 goto err;
 227         }
 228         if (tmp_panel)
 229                 dev_err(dev, "found panel on endpoint\n");
 230 #else
 231         ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL, &bridge);
 232                 if (ret)
 233                         goto err;
 234 #endif
 235 #if KERNEL_VERSION(5, 7, 0) <= LINUX_VERSION_CODE
 236         ret = drm_bridge_attach(encoder, bridge, NULL, 0);
 237 #else
 238         ret = drm_bridge_attach(encoder, bridge, NULL);
 239 #endif
 240         if (ret)
 241                 goto err;
 242
 243         dev_info(dev,"encoder_bind end\n");
 244         return 0;
 245 err:
 246         drm_encoder_cleanup(encoder);
 247         dev_info(dev,"encoder_bind error\n");
 248
 249         //return ret;
 250         return 0;
 251 }
 252
 253 static void encoder_unbind(struct device *dev, struct device *master,
 254                                   void *data)
 255 {
 256         struct simple_encoder *simple = dev_get_drvdata(dev);
 257
 258         drm_encoder_cleanup(&simple->encoder);
 259 }
 260
 261 static const struct component_ops encoder_component_ops = {
 262         .bind = encoder_bind,
 263         .unbind = encoder_unbind,
 264 };
 265
 266 static const struct of_device_id simple_encoder_dt_match[] = {
 267         { .compatible = "verisilicon,rgb-encoder", .data = &hdmi_priv},
 268         { .compatible = "verisilicon,dp-encoder", .data = &hdmi_priv},
 269         { .compatible = "verisilicon,dsi-encoder", .data = &dsi_priv},
 270         {},
 271 };
 272 MODULE_DEVICE_TABLE(of, simple_encoder_dt_match);
 273
 274 static int encoder_probe(struct platform_device *pdev)
 275 {
 276         struct device *dev = &pdev->dev;
 277         struct simple_encoder *simple;
 278
 279         simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
 280         if (!simple)
 281                 return -ENOMEM;
 282
 283         simple->priv = of_device_get_match_data(dev);
 284
 285         simple->dev = dev;
 286
 287         dev_set_drvdata(dev, simple);
 288 #if 0
 289         ret = encoder_parse_dt(dev);
 290         if (ret)
 291                 return ret;
 292 #endif
 293         return component_add(dev, &encoder_component_ops);
 294 }
 295
 296 static int encoder_remove(struct platform_device *pdev)
 297 {
 298         struct device *dev = &pdev->dev;
 299
 300         component_del(dev, &encoder_component_ops);
 301
 302         dev_set_drvdata(dev, NULL);
 303
 304         return 0;
 305 }
 306
 307 struct platform_driver simple_encoder_driver = {
 308         .probe = encoder_probe,
 309         .remove = encoder_remove,
 310         .driver = {
 311                 .name = "vs-simple-encoder",
 312                 .of_match_table = of_match_ptr(simple_encoder_dt_match),
 313         },
 314 };
 315
 316 MODULE_DESCRIPTION("Simple Encoder Driver");
 317 MODULE_LICENSE("GPL v2");