drivers/gpu/drm/meson/meson_plane.c

   1 /*
   2  * Copyright (C) 2016 BayLibre, SAS
   3  * Author: Neil Armstrong <narmstrong@baylibre.com>
   4  * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
   5  * Copyright (C) 2014 Endless Mobile
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  *
  20  * Written by:
  21  *     Jasper St. Pierre <jstpierre@mecheye.net>
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/mutex.h>
  27 #include <linux/platform_device.h>
  28 #include <drm/drmP.h>
  29 #include <drm/drm_atomic.h>
  30 #include <drm/drm_atomic_helper.h>
  31 #include <drm/drm_plane_helper.h>
  32 #include <drm/drm_gem_cma_helper.h>
  33 #include <drm/drm_fb_cma_helper.h>
  34 #include <drm/drm_rect.h>
  35
  36 #include "meson_plane.h"
  37 #include "meson_vpp.h"
  38 #include "meson_viu.h"
  39 #include "meson_canvas.h"
  40 #include "meson_registers.h"
  41
  42 struct meson_plane {
  43         struct drm_plane base;
  44         struct meson_drm *priv;
  45 };
  46 #define to_meson_plane(x) container_of(x, struct meson_plane, base)
  47
  48 static int meson_plane_atomic_check(struct drm_plane *plane,
  49                                     struct drm_plane_state *state)
  50 {
  51         struct drm_crtc_state *crtc_state;
  52
  53         if (!state->crtc)
  54                 return 0;
  55
  56         crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
  57         if (IS_ERR(crtc_state))
  58                 return PTR_ERR(crtc_state);
  59
  60         return drm_atomic_helper_check_plane_state(state, crtc_state,
  61                                                    DRM_PLANE_HELPER_NO_SCALING,
  62                                                    DRM_PLANE_HELPER_NO_SCALING,
  63                                                    true, true);
  64 }
  65
  66 /* Takes a fixed 16.16 number and converts it to integer. */
  67 static inline int64_t fixed16_to_int(int64_t value)
  68 {
  69         return value >> 16;
  70 }
  71
  72 static void meson_plane_atomic_update(struct drm_plane *plane,
  73                                       struct drm_plane_state *old_state)
  74 {
  75         struct meson_plane *meson_plane = to_meson_plane(plane);
  76         struct drm_plane_state *state = plane->state;
  77         struct drm_framebuffer *fb = state->fb;
  78         struct meson_drm *priv = meson_plane->priv;
  79         struct drm_gem_cma_object *gem;
  80         struct drm_rect src = {
  81                 .x1 = (state->src_x),
  82                 .y1 = (state->src_y),
  83                 .x2 = (state->src_x + state->src_w),
  84                 .y2 = (state->src_y + state->src_h),
  85         };
  86         struct drm_rect dest = {
  87                 .x1 = state->crtc_x,
  88                 .y1 = state->crtc_y,
  89                 .x2 = state->crtc_x + state->crtc_w,
  90                 .y2 = state->crtc_y + state->crtc_h,
  91         };
  92         unsigned long flags;
  93
  94         /*
  95          * Update Coordinates
  96          * Update Formats
  97          * Update Buffer
  98          * Enable Plane
  99          */
 100         spin_lock_irqsave(&priv->drm->event_lock, flags);
 101
 102         /* Enable OSD and BLK0, set max global alpha */
 103         priv->viu.osd1_ctrl_stat = OSD_ENABLE |
 104                                    (0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
 105                                    OSD_BLK0_ENABLE;
 106
 107         /* Set up BLK0 to point to the right canvas */
 108         priv->viu.osd1_blk0_cfg[0] = ((MESON_CANVAS_ID_OSD1 << OSD_CANVAS_SEL) |
 109                                       OSD_ENDIANNESS_LE);
 110
 111         /* On GXBB, Use the old non-HDR RGB2YUV converter */
 112         if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
 113                 priv->viu.osd1_blk0_cfg[0] |= OSD_OUTPUT_COLOR_RGB;
 114
 115         switch (fb->format->format) {
 116         case DRM_FORMAT_XRGB8888:
 117                 /* For XRGB, replace the pixel's alpha by 0xFF */
 118                 writel_bits_relaxed(OSD_REPLACE_EN, OSD_REPLACE_EN,
 119                                     priv->io_base + _REG(VIU_OSD1_CTRL_STAT2));
 120                 priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
 121                                               OSD_COLOR_MATRIX_32_ARGB;
 122                 break;
 123         case DRM_FORMAT_ARGB8888:
 124                 /* For ARGB, use the pixel's alpha */
 125                 writel_bits_relaxed(OSD_REPLACE_EN, 0,
 126                                     priv->io_base + _REG(VIU_OSD1_CTRL_STAT2));
 127                 priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
 128                                               OSD_COLOR_MATRIX_32_ARGB;
 129                 break;
 130         case DRM_FORMAT_RGB888:
 131                 priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_24 |
 132                                               OSD_COLOR_MATRIX_24_RGB;
 133                 break;
 134         case DRM_FORMAT_RGB565:
 135                 priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_16 |
 136                                               OSD_COLOR_MATRIX_16_RGB565;
 137                 break;
 138         };
 139
 140         if (state->crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) {
 141                 priv->viu.osd1_interlace = true;
 142
 143                 dest.y1 /= 2;
 144                 dest.y2 /= 2;
 145         } else
 146                 priv->viu.osd1_interlace = false;
 147
 148         /*
 149          * The format of these registers is (x2 << 16 | x1),
 150          * where x2 is exclusive.
 151          * e.g. +30x1920 would be (1919 << 16) | 30
 152          */
 153         priv->viu.osd1_blk0_cfg[1] = ((fixed16_to_int(src.x2) - 1) << 16) |
 154                                         fixed16_to_int(src.x1);
 155         priv->viu.osd1_blk0_cfg[2] = ((fixed16_to_int(src.y2) - 1) << 16) |
 156                                         fixed16_to_int(src.y1);
 157         priv->viu.osd1_blk0_cfg[3] = ((dest.x2 - 1) << 16) | dest.x1;
 158         priv->viu.osd1_blk0_cfg[4] = ((dest.y2 - 1) << 16) | dest.y1;
 159
 160         /* Update Canvas with buffer address */
 161         gem = drm_fb_cma_get_gem_obj(fb, 0);
 162
 163         priv->viu.osd1_addr = gem->paddr;
 164         priv->viu.osd1_stride = fb->pitches[0];
 165         priv->viu.osd1_height = fb->height;
 166
 167         spin_unlock_irqrestore(&priv->drm->event_lock, flags);
 168 }
 169
 170 static void meson_plane_atomic_disable(struct drm_plane *plane,
 171                                        struct drm_plane_state *old_state)
 172 {
 173         struct meson_plane *meson_plane = to_meson_plane(plane);
 174         struct meson_drm *priv = meson_plane->priv;
 175
 176         /* Disable OSD1 */
 177         writel_bits_relaxed(VPP_OSD1_POSTBLEND, 0,
 178                             priv->io_base + _REG(VPP_MISC));
 179
 180 }
 181
 182 static const struct drm_plane_helper_funcs meson_plane_helper_funcs = {
 183         .atomic_check   = meson_plane_atomic_check,
 184         .atomic_disable = meson_plane_atomic_disable,
 185         .atomic_update  = meson_plane_atomic_update,
 186 };
 187
 188 static const struct drm_plane_funcs meson_plane_funcs = {
 189         .update_plane           = drm_atomic_helper_update_plane,
 190         .disable_plane          = drm_atomic_helper_disable_plane,
 191         .destroy                = drm_plane_cleanup,
 192         .reset                  = drm_atomic_helper_plane_reset,
 193         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 194         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 195 };
 196
 197 static const uint32_t supported_drm_formats[] = {
 198         DRM_FORMAT_ARGB8888,
 199         DRM_FORMAT_XRGB8888,
 200         DRM_FORMAT_RGB888,
 201         DRM_FORMAT_RGB565,
 202 };
 203
 204 int meson_plane_create(struct meson_drm *priv)
 205 {
 206         struct meson_plane *meson_plane;
 207         struct drm_plane *plane;
 208
 209         meson_plane = devm_kzalloc(priv->drm->dev, sizeof(*meson_plane),
 210                                    GFP_KERNEL);
 211         if (!meson_plane)
 212                 return -ENOMEM;
 213
 214         meson_plane->priv = priv;
 215         plane = &meson_plane->base;
 216
 217         drm_universal_plane_init(priv->drm, plane, 0xFF,
 218                                  &meson_plane_funcs,
 219                                  supported_drm_formats,
 220                                  ARRAY_SIZE(supported_drm_formats),
 221                                  NULL,
 222                                  DRM_PLANE_TYPE_PRIMARY, "meson_primary_plane");
 223
 224         drm_plane_helper_add(plane, &meson_plane_helper_funcs);
 225
 226         priv->primary_plane = plane;
 227
 228         return 0;
 229 }