1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> 5 */ 6 7 #include <drm/drm_atomic.h> 8 #include <drm/drm_atomic_helper.h> 9 #include <drm/drm_blend.h> 10 #include <drm/drm_crtc.h> 11 #include <drm/drm_fourcc.h> 12 #include <drm/drm_framebuffer.h> 13 #include <drm/drm_gem_atomic_helper.h> 14 15 #include "tidss_crtc.h" 16 #include "tidss_dispc.h" 17 #include "tidss_drv.h" 18 #include "tidss_plane.h" 19 20 /* drm_plane_helper_funcs */ 21 22 static int tidss_plane_atomic_check(struct drm_plane *plane, 23 struct drm_atomic_state *state) 24 { 25 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 26 plane); 27 struct drm_device *ddev = plane->dev; 28 struct tidss_device *tidss = to_tidss(ddev); 29 struct tidss_plane *tplane = to_tidss_plane(plane); 30 const struct drm_format_info *finfo; 31 struct drm_crtc_state *crtc_state; 32 u32 hw_plane = tplane->hw_plane_id; 33 u32 hw_videoport; 34 int ret; 35 36 dev_dbg(ddev->dev, "%s\n", __func__); 37 38 if (!new_plane_state->crtc) { 39 /* 40 * The visible field is not reset by the DRM core but only 41 * updated by drm_atomic_helper_check_plane_state(), set it 42 * manually. 43 */ 44 new_plane_state->visible = false; 45 return 0; 46 } 47 48 crtc_state = drm_atomic_get_crtc_state(state, 49 new_plane_state->crtc); 50 if (IS_ERR(crtc_state)) 51 return PTR_ERR(crtc_state); 52 53 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, 54 0, 55 INT_MAX, true, true); 56 if (ret < 0) 57 return ret; 58 59 /* 60 * The HW is only able to start drawing at subpixel boundary 61 * (the two first checks bellow). At the end of a row the HW 62 * can only jump integer number of subpixels forward to the 63 * beginning of the next row. So we can only show picture with 64 * integer subpixel width (the third check). However, after 65 * reaching the end of the drawn picture the drawing starts 66 * again at the absolute memory address where top left corner 67 * position of the drawn picture is (so there is no need to 68 * check for odd height). 69 */ 70 71 finfo = drm_format_info(new_plane_state->fb->format->format); 72 73 if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) { 74 dev_dbg(ddev->dev, 75 "%s: x-position %u not divisible subpixel size %u\n", 76 __func__, (new_plane_state->src_x >> 16), finfo->hsub); 77 return -EINVAL; 78 } 79 80 if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) { 81 dev_dbg(ddev->dev, 82 "%s: y-position %u not divisible subpixel size %u\n", 83 __func__, (new_plane_state->src_y >> 16), finfo->vsub); 84 return -EINVAL; 85 } 86 87 if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) { 88 dev_dbg(ddev->dev, 89 "%s: src width %u not divisible by subpixel size %u\n", 90 __func__, (new_plane_state->src_w >> 16), 91 finfo->hsub); 92 return -EINVAL; 93 } 94 95 if (!new_plane_state->visible) 96 return 0; 97 98 hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport; 99 100 ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state, 101 hw_videoport); 102 if (ret) 103 return ret; 104 105 return 0; 106 } 107 108 static void tidss_plane_atomic_update(struct drm_plane *plane, 109 struct drm_atomic_state *state) 110 { 111 struct drm_device *ddev = plane->dev; 112 struct tidss_device *tidss = to_tidss(ddev); 113 struct tidss_plane *tplane = to_tidss_plane(plane); 114 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 115 plane); 116 u32 hw_videoport; 117 118 dev_dbg(ddev->dev, "%s\n", __func__); 119 120 if (!new_state->visible) { 121 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false); 122 return; 123 } 124 125 hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport; 126 127 dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport); 128 } 129 130 static void tidss_plane_atomic_enable(struct drm_plane *plane, 131 struct drm_atomic_state *state) 132 { 133 struct drm_device *ddev = plane->dev; 134 struct tidss_device *tidss = to_tidss(ddev); 135 struct tidss_plane *tplane = to_tidss_plane(plane); 136 137 dev_dbg(ddev->dev, "%s\n", __func__); 138 139 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true); 140 } 141 142 static void tidss_plane_atomic_disable(struct drm_plane *plane, 143 struct drm_atomic_state *state) 144 { 145 struct drm_device *ddev = plane->dev; 146 struct tidss_device *tidss = to_tidss(ddev); 147 struct tidss_plane *tplane = to_tidss_plane(plane); 148 149 dev_dbg(ddev->dev, "%s\n", __func__); 150 151 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false); 152 } 153 154 static void drm_plane_destroy(struct drm_plane *plane) 155 { 156 struct tidss_plane *tplane = to_tidss_plane(plane); 157 158 drm_plane_cleanup(plane); 159 kfree(tplane); 160 } 161 162 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = { 163 .atomic_check = tidss_plane_atomic_check, 164 .atomic_update = tidss_plane_atomic_update, 165 .atomic_enable = tidss_plane_atomic_enable, 166 .atomic_disable = tidss_plane_atomic_disable, 167 }; 168 169 static const struct drm_plane_funcs tidss_plane_funcs = { 170 .update_plane = drm_atomic_helper_update_plane, 171 .disable_plane = drm_atomic_helper_disable_plane, 172 .reset = drm_atomic_helper_plane_reset, 173 .destroy = drm_plane_destroy, 174 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 175 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 176 }; 177 178 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss, 179 u32 hw_plane_id, u32 plane_type, 180 u32 crtc_mask, const u32 *formats, 181 u32 num_formats) 182 { 183 struct tidss_plane *tplane; 184 enum drm_plane_type type; 185 u32 possible_crtcs; 186 u32 num_planes = tidss->feat->num_planes; 187 u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) | 188 BIT(DRM_COLOR_YCBCR_BT709)); 189 u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) | 190 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE)); 191 u32 default_encoding = DRM_COLOR_YCBCR_BT601; 192 u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE; 193 u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) | 194 BIT(DRM_MODE_BLEND_COVERAGE)); 195 int ret; 196 197 tplane = kzalloc(sizeof(*tplane), GFP_KERNEL); 198 if (!tplane) 199 return ERR_PTR(-ENOMEM); 200 201 tplane->hw_plane_id = hw_plane_id; 202 203 possible_crtcs = crtc_mask; 204 type = plane_type; 205 206 ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane, 207 possible_crtcs, 208 &tidss_plane_funcs, 209 formats, num_formats, 210 NULL, type, NULL); 211 if (ret < 0) 212 goto err; 213 214 drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs); 215 216 drm_plane_create_zpos_property(&tplane->plane, hw_plane_id, 0, 217 num_planes - 1); 218 219 ret = drm_plane_create_color_properties(&tplane->plane, 220 color_encodings, 221 color_ranges, 222 default_encoding, 223 default_range); 224 if (ret) 225 goto err; 226 227 ret = drm_plane_create_alpha_property(&tplane->plane); 228 if (ret) 229 goto err; 230 231 ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes); 232 if (ret) 233 goto err; 234 235 return tplane; 236 237 err: 238 kfree(tplane); 239 return ERR_PTR(ret); 240 } 241