linux/drivers/gpu/drm/sti/sti_compositor.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (C) STMicroelectronics SA 2014
   4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
   5 *          Fabien Dessenne <fabien.dessenne@st.com>
   6 *          for STMicroelectronics.
   7 */
   8
   9#include <linux/component.h>
  10#include <linux/io.h>
  11#include <linux/module.h>
  12#include <linux/platform_device.h>
  13#include <linux/reset.h>
  14
  15#include <drm/drm_device.h>
  16#include <drm/drm_print.h>
  17#include <drm/drm_vblank.h>
  18
  19#include "sti_compositor.h"
  20#include "sti_crtc.h"
  21#include "sti_cursor.h"
  22#include "sti_drv.h"
  23#include "sti_gdp.h"
  24#include "sti_plane.h"
  25#include "sti_vid.h"
  26#include "sti_vtg.h"
  27
  28/*
  29 * stiH407 compositor properties
  30 */
  31static const struct sti_compositor_data stih407_compositor_data = {
  32        .nb_subdev = 8,
  33        .subdev_desc = {
  34                        {STI_CURSOR_SUBDEV, (int)STI_CURSOR, 0x000},
  35                        {STI_GPD_SUBDEV, (int)STI_GDP_0, 0x100},
  36                        {STI_GPD_SUBDEV, (int)STI_GDP_1, 0x200},
  37                        {STI_GPD_SUBDEV, (int)STI_GDP_2, 0x300},
  38                        {STI_GPD_SUBDEV, (int)STI_GDP_3, 0x400},
  39                        {STI_VID_SUBDEV, (int)STI_HQVDP_0, 0x700},
  40                        {STI_MIXER_MAIN_SUBDEV, STI_MIXER_MAIN, 0xC00},
  41                        {STI_MIXER_AUX_SUBDEV, STI_MIXER_AUX, 0xD00},
  42        },
  43};
  44
  45void sti_compositor_debugfs_init(struct sti_compositor *compo,
  46                                 struct drm_minor *minor)
  47{
  48        unsigned int i;
  49
  50        for (i = 0; i < STI_MAX_VID; i++)
  51                if (compo->vid[i])
  52                        vid_debugfs_init(compo->vid[i], minor);
  53
  54        for (i = 0; i < STI_MAX_MIXER; i++)
  55                if (compo->mixer[i])
  56                        sti_mixer_debugfs_init(compo->mixer[i], minor);
  57}
  58
  59static int sti_compositor_bind(struct device *dev,
  60                               struct device *master,
  61                               void *data)
  62{
  63        struct sti_compositor *compo = dev_get_drvdata(dev);
  64        struct drm_device *drm_dev = data;
  65        unsigned int i, mixer_id = 0, vid_id = 0, crtc_id = 0;
  66        struct sti_private *dev_priv = drm_dev->dev_private;
  67        struct drm_plane *cursor = NULL;
  68        struct drm_plane *primary = NULL;
  69        struct sti_compositor_subdev_descriptor *desc = compo->data.subdev_desc;
  70        unsigned int array_size = compo->data.nb_subdev;
  71
  72        dev_priv->compo = compo;
  73
  74        /* Register mixer subdev and video subdev first */
  75        for (i = 0; i < array_size; i++) {
  76                switch (desc[i].type) {
  77                case STI_VID_SUBDEV:
  78                        compo->vid[vid_id++] =
  79                            sti_vid_create(compo->dev, drm_dev, desc[i].id,
  80                                           compo->regs + desc[i].offset);
  81                        break;
  82                case STI_MIXER_MAIN_SUBDEV:
  83                case STI_MIXER_AUX_SUBDEV:
  84                        compo->mixer[mixer_id++] =
  85                            sti_mixer_create(compo->dev, drm_dev, desc[i].id,
  86                                             compo->regs + desc[i].offset);
  87                        break;
  88                case STI_GPD_SUBDEV:
  89                case STI_CURSOR_SUBDEV:
  90                        /* Nothing to do, wait for the second round */
  91                        break;
  92                default:
  93                        DRM_ERROR("Unknown subdev component type\n");
  94                        return 1;
  95                }
  96        }
  97
  98        /* Register the other subdevs, create crtc and planes */
  99        for (i = 0; i < array_size; i++) {
 100                enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
 101
 102                if (crtc_id < mixer_id)
 103                        plane_type = DRM_PLANE_TYPE_PRIMARY;
 104
 105                switch (desc[i].type) {
 106                case STI_MIXER_MAIN_SUBDEV:
 107                case STI_MIXER_AUX_SUBDEV:
 108                case STI_VID_SUBDEV:
 109                        /* Nothing to do, already done at the first round */
 110                        break;
 111                case STI_CURSOR_SUBDEV:
 112                        cursor = sti_cursor_create(drm_dev, compo->dev,
 113                                                   desc[i].id,
 114                                                   compo->regs + desc[i].offset,
 115                                                   1);
 116                        if (!cursor) {
 117                                DRM_ERROR("Can't create CURSOR plane\n");
 118                                break;
 119                        }
 120                        break;
 121                case STI_GPD_SUBDEV:
 122                        primary = sti_gdp_create(drm_dev, compo->dev,
 123                                                 desc[i].id,
 124                                                 compo->regs + desc[i].offset,
 125                                                 (1 << mixer_id) - 1,
 126                                                 plane_type);
 127                        if (!primary) {
 128                                DRM_ERROR("Can't create GDP plane\n");
 129                                break;
 130                        }
 131                        break;
 132                default:
 133                        DRM_ERROR("Unknown subdev component type\n");
 134                        return 1;
 135                }
 136
 137                /* The first planes are reserved for primary planes*/
 138                if (crtc_id < mixer_id && primary) {
 139                        sti_crtc_init(drm_dev, compo->mixer[crtc_id],
 140                                      primary, cursor);
 141                        crtc_id++;
 142                        cursor = NULL;
 143                        primary = NULL;
 144                }
 145        }
 146
 147        drm_vblank_init(drm_dev, crtc_id);
 148        /* Allow usage of vblank without having to call drm_irq_install */
 149        drm_dev->irq_enabled = 1;
 150
 151        return 0;
 152}
 153
 154static void sti_compositor_unbind(struct device *dev, struct device *master,
 155        void *data)
 156{
 157        /* do nothing */
 158}
 159
 160static const struct component_ops sti_compositor_ops = {
 161        .bind   = sti_compositor_bind,
 162        .unbind = sti_compositor_unbind,
 163};
 164
 165static const struct of_device_id compositor_of_match[] = {
 166        {
 167                .compatible = "st,stih407-compositor",
 168                .data = &stih407_compositor_data,
 169        }, {
 170                /* end node */
 171        }
 172};
 173MODULE_DEVICE_TABLE(of, compositor_of_match);
 174
 175static int sti_compositor_probe(struct platform_device *pdev)
 176{
 177        struct device *dev = &pdev->dev;
 178        struct device_node *np = dev->of_node;
 179        struct device_node *vtg_np;
 180        struct sti_compositor *compo;
 181        struct resource *res;
 182        unsigned int i;
 183
 184        compo = devm_kzalloc(dev, sizeof(*compo), GFP_KERNEL);
 185        if (!compo) {
 186                DRM_ERROR("Failed to allocate compositor context\n");
 187                return -ENOMEM;
 188        }
 189        compo->dev = dev;
 190        for (i = 0; i < STI_MAX_MIXER; i++)
 191                compo->vtg_vblank_nb[i].notifier_call = sti_crtc_vblank_cb;
 192
 193        /* populate data structure depending on compatibility */
 194        BUG_ON(!of_match_node(compositor_of_match, np)->data);
 195
 196        memcpy(&compo->data, of_match_node(compositor_of_match, np)->data,
 197               sizeof(struct sti_compositor_data));
 198
 199        /* Get Memory ressources */
 200        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 201        if (res == NULL) {
 202                DRM_ERROR("Get memory resource failed\n");
 203                return -ENXIO;
 204        }
 205        compo->regs = devm_ioremap(dev, res->start, resource_size(res));
 206        if (compo->regs == NULL) {
 207                DRM_ERROR("Register mapping failed\n");
 208                return -ENXIO;
 209        }
 210
 211        /* Get clock resources */
 212        compo->clk_compo_main = devm_clk_get(dev, "compo_main");
 213        if (IS_ERR(compo->clk_compo_main)) {
 214                DRM_ERROR("Cannot get compo_main clock\n");
 215                return PTR_ERR(compo->clk_compo_main);
 216        }
 217
 218        compo->clk_compo_aux = devm_clk_get(dev, "compo_aux");
 219        if (IS_ERR(compo->clk_compo_aux)) {
 220                DRM_ERROR("Cannot get compo_aux clock\n");
 221                return PTR_ERR(compo->clk_compo_aux);
 222        }
 223
 224        compo->clk_pix_main = devm_clk_get(dev, "pix_main");
 225        if (IS_ERR(compo->clk_pix_main)) {
 226                DRM_ERROR("Cannot get pix_main clock\n");
 227                return PTR_ERR(compo->clk_pix_main);
 228        }
 229
 230        compo->clk_pix_aux = devm_clk_get(dev, "pix_aux");
 231        if (IS_ERR(compo->clk_pix_aux)) {
 232                DRM_ERROR("Cannot get pix_aux clock\n");
 233                return PTR_ERR(compo->clk_pix_aux);
 234        }
 235
 236        /* Get reset resources */
 237        compo->rst_main = devm_reset_control_get_shared(dev, "compo-main");
 238        /* Take compo main out of reset */
 239        if (!IS_ERR(compo->rst_main))
 240                reset_control_deassert(compo->rst_main);
 241
 242        compo->rst_aux = devm_reset_control_get_shared(dev, "compo-aux");
 243        /* Take compo aux out of reset */
 244        if (!IS_ERR(compo->rst_aux))
 245                reset_control_deassert(compo->rst_aux);
 246
 247        vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
 248        if (vtg_np)
 249                compo->vtg[STI_MIXER_MAIN] = of_vtg_find(vtg_np);
 250        of_node_put(vtg_np);
 251
 252        vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 1);
 253        if (vtg_np)
 254                compo->vtg[STI_MIXER_AUX] = of_vtg_find(vtg_np);
 255        of_node_put(vtg_np);
 256
 257        platform_set_drvdata(pdev, compo);
 258
 259        return component_add(&pdev->dev, &sti_compositor_ops);
 260}
 261
 262static int sti_compositor_remove(struct platform_device *pdev)
 263{
 264        component_del(&pdev->dev, &sti_compositor_ops);
 265        return 0;
 266}
 267
 268struct platform_driver sti_compositor_driver = {
 269        .driver = {
 270                .name = "sti-compositor",
 271                .of_match_table = compositor_of_match,
 272        },
 273        .probe = sti_compositor_probe,
 274        .remove = sti_compositor_remove,
 275};
 276
 277MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 278MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 279MODULE_LICENSE("GPL");
 280
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