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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2011 Samsung Electronics Co.Ltd4 * Authors: Joonyoung Shim <jy0922.shim@samsung.com>5 */6 7 8#include <drm/drm_atomic.h>9#include <drm/drm_atomic_helper.h>10#include <drm/drm_blend.h>11#include <drm/drm_framebuffer.h>12#include <drm/exynos_drm.h>13 14#include "exynos_drm_crtc.h"15#include "exynos_drm_drv.h"16#include "exynos_drm_fb.h"17#include "exynos_drm_gem.h"18#include "exynos_drm_plane.h"19 20/*21 * This function is to get X or Y size shown via screen. This needs length and22 * start position of CRTC.23 *24 * <--- length --->25 * CRTC ----------------26 * ^ start ^ end27 *28 * There are six cases from a to f.29 *30 * <----- SCREEN ----->31 * 0 last32 * ----------|------------------|----------33 * CRTCs34 * a -------35 * b -------36 * c --------------------------37 * d --------38 * e -------39 * f -------40 */41static int exynos_plane_get_size(int start, unsigned length, unsigned last)42{43 int end = start + length;44 int size = 0;45 46 if (start <= 0) {47 if (end > 0)48 size = min_t(unsigned, end, last);49 } else if (start <= last) {50 size = min_t(unsigned, last - start, length);51 }52 53 return size;54}55 56static void exynos_plane_mode_set(struct exynos_drm_plane_state *exynos_state)57{58 struct drm_plane_state *state = &exynos_state->base;59 struct drm_crtc *crtc = state->crtc;60 struct drm_crtc_state *crtc_state =61 drm_atomic_get_existing_crtc_state(state->state, crtc);62 struct drm_display_mode *mode = &crtc_state->adjusted_mode;63 int crtc_x, crtc_y;64 unsigned int crtc_w, crtc_h;65 unsigned int src_x, src_y;66 unsigned int src_w, src_h;67 unsigned int actual_w;68 unsigned int actual_h;69 70 /*71 * The original src/dest coordinates are stored in exynos_state->base,72 * but we want to keep another copy internal to our driver that we can73 * clip/modify ourselves.74 */75 76 crtc_x = state->crtc_x;77 crtc_y = state->crtc_y;78 crtc_w = state->crtc_w;79 crtc_h = state->crtc_h;80 81 src_x = state->src_x >> 16;82 src_y = state->src_y >> 16;83 src_w = state->src_w >> 16;84 src_h = state->src_h >> 16;85 86 /* set ratio */87 exynos_state->h_ratio = (src_w << 16) / crtc_w;88 exynos_state->v_ratio = (src_h << 16) / crtc_h;89 90 /* clip to visible area */91 actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);92 actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);93 94 if (crtc_x < 0) {95 if (actual_w)96 src_x += ((-crtc_x) * exynos_state->h_ratio) >> 16;97 crtc_x = 0;98 }99 100 if (crtc_y < 0) {101 if (actual_h)102 src_y += ((-crtc_y) * exynos_state->v_ratio) >> 16;103 crtc_y = 0;104 }105 106 /* set drm framebuffer data. */107 exynos_state->src.x = src_x;108 exynos_state->src.y = src_y;109 exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;110 exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;111 112 /* set plane range to be displayed. */113 exynos_state->crtc.x = crtc_x;114 exynos_state->crtc.y = crtc_y;115 exynos_state->crtc.w = actual_w;116 exynos_state->crtc.h = actual_h;117 118 DRM_DEV_DEBUG_KMS(crtc->dev->dev,119 "plane : offset_x/y(%d,%d), width/height(%d,%d)",120 exynos_state->crtc.x, exynos_state->crtc.y,121 exynos_state->crtc.w, exynos_state->crtc.h);122}123 124static void exynos_drm_plane_reset(struct drm_plane *plane)125{126 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);127 struct exynos_drm_plane_state *exynos_state;128 129 if (plane->state) {130 exynos_state = to_exynos_plane_state(plane->state);131 __drm_atomic_helper_plane_destroy_state(plane->state);132 kfree(exynos_state);133 plane->state = NULL;134 }135 136 exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);137 if (exynos_state) {138 __drm_atomic_helper_plane_reset(plane, &exynos_state->base);139 plane->state->zpos = exynos_plane->config->zpos;140 }141}142 143static struct drm_plane_state *144exynos_drm_plane_duplicate_state(struct drm_plane *plane)145{146 struct exynos_drm_plane_state *exynos_state;147 struct exynos_drm_plane_state *copy;148 149 exynos_state = to_exynos_plane_state(plane->state);150 copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);151 if (!copy)152 return NULL;153 154 __drm_atomic_helper_plane_duplicate_state(plane, ©->base);155 return ©->base;156}157 158static void exynos_drm_plane_destroy_state(struct drm_plane *plane,159 struct drm_plane_state *old_state)160{161 struct exynos_drm_plane_state *old_exynos_state =162 to_exynos_plane_state(old_state);163 __drm_atomic_helper_plane_destroy_state(old_state);164 kfree(old_exynos_state);165}166 167static struct drm_plane_funcs exynos_plane_funcs = {168 .update_plane = drm_atomic_helper_update_plane,169 .disable_plane = drm_atomic_helper_disable_plane,170 .destroy = drm_plane_cleanup,171 .reset = exynos_drm_plane_reset,172 .atomic_duplicate_state = exynos_drm_plane_duplicate_state,173 .atomic_destroy_state = exynos_drm_plane_destroy_state,174};175 176static int177exynos_drm_plane_check_format(const struct exynos_drm_plane_config *config,178 struct exynos_drm_plane_state *state)179{180 struct drm_framebuffer *fb = state->base.fb;181 struct drm_device *dev = fb->dev;182 183 switch (fb->modifier) {184 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:185 if (!(config->capabilities & EXYNOS_DRM_PLANE_CAP_TILE))186 return -ENOTSUPP;187 break;188 189 case DRM_FORMAT_MOD_LINEAR:190 break;191 192 default:193 DRM_DEV_ERROR(dev->dev, "unsupported pixel format modifier");194 return -ENOTSUPP;195 }196 197 return 0;198}199 200static int201exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,202 struct exynos_drm_plane_state *state)203{204 struct drm_crtc *crtc = state->base.crtc;205 bool width_ok = false, height_ok = false;206 207 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)208 return 0;209 210 if (state->src.w == state->crtc.w)211 width_ok = true;212 213 if (state->src.h == state->crtc.h)214 height_ok = true;215 216 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&217 state->h_ratio == (1 << 15))218 width_ok = true;219 220 if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&221 state->v_ratio == (1 << 15))222 height_ok = true;223 224 if (width_ok && height_ok)225 return 0;226 227 DRM_DEV_DEBUG_KMS(crtc->dev->dev, "scaling mode is not supported");228 return -ENOTSUPP;229}230 231static int exynos_plane_atomic_check(struct drm_plane *plane,232 struct drm_atomic_state *state)233{234 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,235 plane);236 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);237 struct exynos_drm_plane_state *exynos_state =238 to_exynos_plane_state(new_plane_state);239 int ret = 0;240 241 if (!new_plane_state->crtc || !new_plane_state->fb)242 return 0;243 244 /* translate state into exynos_state */245 exynos_plane_mode_set(exynos_state);246 247 ret = exynos_drm_plane_check_format(exynos_plane->config, exynos_state);248 if (ret)249 return ret;250 251 ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);252 return ret;253}254 255static void exynos_plane_atomic_update(struct drm_plane *plane,256 struct drm_atomic_state *state)257{258 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,259 plane);260 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(new_state->crtc);261 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);262 263 if (!new_state->crtc)264 return;265 266 if (exynos_crtc->ops->update_plane)267 exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);268}269 270static void exynos_plane_atomic_disable(struct drm_plane *plane,271 struct drm_atomic_state *state)272{273 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);274 struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);275 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);276 277 if (!old_state->crtc)278 return;279 280 if (exynos_crtc->ops->disable_plane)281 exynos_crtc->ops->disable_plane(exynos_crtc, exynos_plane);282}283 284static const struct drm_plane_helper_funcs plane_helper_funcs = {285 .atomic_check = exynos_plane_atomic_check,286 .atomic_update = exynos_plane_atomic_update,287 .atomic_disable = exynos_plane_atomic_disable,288};289 290static void exynos_plane_attach_zpos_property(struct drm_plane *plane,291 int zpos, bool immutable)292{293 if (immutable)294 drm_plane_create_zpos_immutable_property(plane, zpos);295 else296 drm_plane_create_zpos_property(plane, zpos, 0, MAX_PLANE - 1);297}298 299int exynos_plane_init(struct drm_device *dev,300 struct exynos_drm_plane *exynos_plane, unsigned int index,301 const struct exynos_drm_plane_config *config)302{303 int err;304 unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |305 BIT(DRM_MODE_BLEND_PREMULTI) |306 BIT(DRM_MODE_BLEND_COVERAGE);307 struct drm_plane *plane = &exynos_plane->base;308 309 err = drm_universal_plane_init(dev, &exynos_plane->base,310 1 << dev->mode_config.num_crtc,311 &exynos_plane_funcs,312 config->pixel_formats,313 config->num_pixel_formats,314 NULL, config->type, NULL);315 if (err) {316 DRM_DEV_ERROR(dev->dev, "failed to initialize plane\n");317 return err;318 }319 320 drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);321 322 exynos_plane->index = index;323 exynos_plane->config = config;324 325 exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos,326 !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));327 328 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND)329 drm_plane_create_blend_mode_property(plane, supported_modes);330 331 if (config->capabilities & EXYNOS_DRM_PLANE_CAP_WIN_BLEND)332 drm_plane_create_alpha_property(plane);333 334 return 0;335}336