drivers/gpu/drm/exynos/exynos_drm_plane.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics Co.Ltd
   3  * Authors: Joonyoung Shim <jy0922.shim@samsung.com>
   4  *
   5  * This program is free software; you can redistribute  it and/or modify it
   6  * under  the terms of  the GNU General  Public License as published by the
   7  * Free Software Foundation;  either version 2 of the  License, or (at your
   8  * option) any later version.
   9  *
  10  */
  11
  12 #include "drmP.h"
  13
  14 #include "exynos_drm.h"
  15 #include "exynos_drm_crtc.h"
  16 #include "exynos_drm_drv.h"
  17 #include "exynos_drm_encoder.h"
  18
  19 struct exynos_plane {
  20         struct drm_plane                base;
  21         struct exynos_drm_overlay       overlay;
  22         bool                            enabled;
  23 };
  24
  25 static int
  26 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
  27                      struct drm_framebuffer *fb, int crtc_x, int crtc_y,
  28                      unsigned int crtc_w, unsigned int crtc_h,
  29                      uint32_t src_x, uint32_t src_y,
  30                      uint32_t src_w, uint32_t src_h)
  31 {
  32         struct exynos_plane *exynos_plane =
  33                 container_of(plane, struct exynos_plane, base);
  34         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
  35         struct exynos_drm_crtc_pos pos;
  36         unsigned int x = src_x >> 16;
  37         unsigned int y = src_y >> 16;
  38         int ret;
  39
  40         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
  41
  42         memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos));
  43         pos.crtc_x = crtc_x;
  44         pos.crtc_y = crtc_y;
  45         pos.crtc_w = crtc_w;
  46         pos.crtc_h = crtc_h;
  47
  48         pos.fb_x = x;
  49         pos.fb_y = y;
  50
  51         /* TODO: scale feature */
  52         ret = exynos_drm_overlay_update(overlay, fb, &crtc->mode, &pos);
  53         if (ret < 0)
  54                 return ret;
  55
  56         exynos_drm_fn_encoder(crtc, overlay,
  57                         exynos_drm_encoder_crtc_mode_set);
  58         exynos_drm_fn_encoder(crtc, &overlay->zpos,
  59                         exynos_drm_encoder_crtc_plane_commit);
  60
  61         exynos_plane->enabled = true;
  62
  63         return 0;
  64 }
  65
  66 static int exynos_disable_plane(struct drm_plane *plane)
  67 {
  68         struct exynos_plane *exynos_plane =
  69                 container_of(plane, struct exynos_plane, base);
  70         struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
  71
  72         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
  73
  74         if (!exynos_plane->enabled)
  75                 return 0;
  76
  77         exynos_drm_fn_encoder(plane->crtc, &overlay->zpos,
  78                         exynos_drm_encoder_crtc_disable);
  79
  80         exynos_plane->enabled = false;
  81         exynos_plane->overlay.zpos = DEFAULT_ZPOS;
  82
  83         return 0;
  84 }
  85
  86 static void exynos_plane_destroy(struct drm_plane *plane)
  87 {
  88         struct exynos_plane *exynos_plane =
  89                 container_of(plane, struct exynos_plane, base);
  90
  91         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
  92
  93         exynos_disable_plane(plane);
  94         drm_plane_cleanup(plane);
  95         kfree(exynos_plane);
  96 }
  97
  98 static struct drm_plane_funcs exynos_plane_funcs = {
  99         .update_plane   = exynos_update_plane,
 100         .disable_plane  = exynos_disable_plane,
 101         .destroy        = exynos_plane_destroy,
 102 };
 103
 104 int exynos_plane_init(struct drm_device *dev, unsigned int nr)
 105 {
 106         struct exynos_plane *exynos_plane;
 107         uint32_t possible_crtcs;
 108
 109         exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 110         if (!exynos_plane)
 111                 return -ENOMEM;
 112
 113         /* all CRTCs are available */
 114         possible_crtcs = (1 << MAX_CRTC) - 1;
 115
 116         exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 117
 118         /* TODO: format */
 119         return drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 120                               &exynos_plane_funcs, NULL, 0, false);
 121 }
 122
 123 int exynos_plane_set_zpos_ioctl(struct drm_device *dev, void *data,
 124                                 struct drm_file *file_priv)
 125 {
 126         struct drm_exynos_plane_set_zpos *zpos_req = data;
 127         struct drm_mode_object *obj;
 128         struct drm_plane *plane;
 129         struct exynos_plane *exynos_plane;
 130         int ret = 0;
 131
 132         DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 133
 134         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 135                 return -EINVAL;
 136
 137         if (zpos_req->zpos < 0 || zpos_req->zpos >= MAX_PLANE) {
 138                 if (zpos_req->zpos != DEFAULT_ZPOS) {
 139                         DRM_ERROR("zpos not within limits\n");
 140                         return -EINVAL;
 141                 }
 142         }
 143
 144         mutex_lock(&dev->mode_config.mutex);
 145
 146         obj = drm_mode_object_find(dev, zpos_req->plane_id,
 147                         DRM_MODE_OBJECT_PLANE);
 148         if (!obj) {
 149                 DRM_DEBUG_KMS("Unknown plane ID %d\n",
 150                               zpos_req->plane_id);
 151                 ret = -EINVAL;
 152                 goto out;
 153         }
 154
 155         plane = obj_to_plane(obj);
 156         exynos_plane = container_of(plane, struct exynos_plane, base);
 157
 158         exynos_plane->overlay.zpos = zpos_req->zpos;
 159
 160 out:
 161         mutex_unlock(&dev->mode_config.mutex);
 162         return ret;
 163 }