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1// SPDX-License-Identifier: GPL-2.02/*3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.4 * Author: James.Qian.Wang <james.qian.wang@arm.com>5 *6 */7#include <linux/interrupt.h>8 9#include <drm/drm_atomic.h>10#include <drm/drm_atomic_helper.h>11#include <drm/drm_drv.h>12#include <drm/drm_gem_dma_helper.h>13#include <drm/drm_gem_framebuffer_helper.h>14#include <drm/drm_managed.h>15#include <drm/drm_probe_helper.h>16#include <drm/drm_vblank.h>17 18#include "komeda_dev.h"19#include "komeda_framebuffer.h"20#include "komeda_kms.h"21 22DEFINE_DRM_GEM_DMA_FOPS(komeda_cma_fops);23 24static int komeda_gem_dma_dumb_create(struct drm_file *file,25 struct drm_device *dev,26 struct drm_mode_create_dumb *args)27{28 struct komeda_dev *mdev = dev->dev_private;29 u32 pitch = DIV_ROUND_UP(args->width * args->bpp, 8);30 31 args->pitch = ALIGN(pitch, mdev->chip.bus_width);32 33 return drm_gem_dma_dumb_create_internal(file, dev, args);34}35 36static irqreturn_t komeda_kms_irq_handler(int irq, void *data)37{38 struct drm_device *drm = data;39 struct komeda_dev *mdev = drm->dev_private;40 struct komeda_kms_dev *kms = to_kdev(drm);41 struct komeda_events evts;42 irqreturn_t status;43 u32 i;44 45 /* Call into the CHIP to recognize events */46 memset(&evts, 0, sizeof(evts));47 status = mdev->funcs->irq_handler(mdev, &evts);48 49 komeda_print_events(&evts, drm);50 51 /* Notify the crtc to handle the events */52 for (i = 0; i < kms->n_crtcs; i++)53 komeda_crtc_handle_event(&kms->crtcs[i], &evts);54 55 return status;56}57 58static const struct drm_driver komeda_kms_driver = {59 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,60 DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(komeda_gem_dma_dumb_create),61 .fops = &komeda_cma_fops,62 .name = "komeda",63 .desc = "Arm Komeda Display Processor driver",64 .date = "20181101",65 .major = 0,66 .minor = 1,67};68 69static void komeda_kms_atomic_commit_hw_done(struct drm_atomic_state *state)70{71 struct drm_device *dev = state->dev;72 struct komeda_kms_dev *kms = to_kdev(dev);73 int i;74 75 for (i = 0; i < kms->n_crtcs; i++) {76 struct komeda_crtc *kcrtc = &kms->crtcs[i];77 78 if (kcrtc->base.state->active) {79 struct completion *flip_done = NULL;80 if (kcrtc->base.state->event)81 flip_done = kcrtc->base.state->event->base.completion;82 komeda_crtc_flush_and_wait_for_flip_done(kcrtc, flip_done);83 }84 }85 drm_atomic_helper_commit_hw_done(state);86}87 88static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)89{90 struct drm_device *dev = old_state->dev;91 bool fence_cookie = dma_fence_begin_signalling();92 93 drm_atomic_helper_commit_modeset_disables(dev, old_state);94 95 drm_atomic_helper_commit_planes(dev, old_state,96 DRM_PLANE_COMMIT_ACTIVE_ONLY);97 98 drm_atomic_helper_commit_modeset_enables(dev, old_state);99 100 komeda_kms_atomic_commit_hw_done(old_state);101 102 drm_atomic_helper_wait_for_flip_done(dev, old_state);103 104 dma_fence_end_signalling(fence_cookie);105 106 drm_atomic_helper_cleanup_planes(dev, old_state);107}108 109static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {110 .atomic_commit_tail = komeda_kms_commit_tail,111};112 113static int komeda_plane_state_list_add(struct drm_plane_state *plane_st,114 struct list_head *zorder_list)115{116 struct komeda_plane_state *new = to_kplane_st(plane_st);117 struct komeda_plane_state *node, *last;118 119 last = list_empty(zorder_list) ?120 NULL : list_last_entry(zorder_list, typeof(*last), zlist_node);121 122 /* Considering the list sequence is zpos increasing, so if list is empty123 * or the zpos of new node bigger than the last node in list, no need124 * loop and just insert the new one to the tail of the list.125 */126 if (!last || (new->base.zpos > last->base.zpos)) {127 list_add_tail(&new->zlist_node, zorder_list);128 return 0;129 }130 131 /* Build the list by zpos increasing */132 list_for_each_entry(node, zorder_list, zlist_node) {133 if (new->base.zpos < node->base.zpos) {134 list_add_tail(&new->zlist_node, &node->zlist_node);135 break;136 } else if (node->base.zpos == new->base.zpos) {137 struct drm_plane *a = node->base.plane;138 struct drm_plane *b = new->base.plane;139 140 /* Komeda doesn't support setting a same zpos for141 * different planes.142 */143 DRM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n",144 a->name, b->name, node->base.zpos);145 return -EINVAL;146 }147 }148 149 return 0;150}151 152static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,153 struct drm_crtc_state *crtc_st)154{155 struct drm_atomic_state *state = crtc_st->state;156 struct komeda_crtc *kcrtc = to_kcrtc(crtc);157 struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);158 struct komeda_plane_state *kplane_st;159 struct drm_plane_state *plane_st;160 struct drm_plane *plane;161 struct list_head zorder_list;162 int order = 0, err;163 u32 slave_zpos = 0;164 165 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] calculating normalized zpos values\n",166 crtc->base.id, crtc->name);167 168 INIT_LIST_HEAD(&zorder_list);169 170 /* This loop also added all effected planes into the new state */171 drm_for_each_plane_mask(plane, crtc->dev, crtc_st->plane_mask) {172 plane_st = drm_atomic_get_plane_state(state, plane);173 if (IS_ERR(plane_st))174 return PTR_ERR(plane_st);175 176 /* Build a list by zpos increasing */177 err = komeda_plane_state_list_add(plane_st, &zorder_list);178 if (err)179 return err;180 }181 182 kcrtc_st->max_slave_zorder = 0;183 184 list_for_each_entry(kplane_st, &zorder_list, zlist_node) {185 plane_st = &kplane_st->base;186 plane = plane_st->plane;187 188 plane_st->normalized_zpos = order++;189 /* When layer_split has been enabled, one plane will be handled190 * by two separated komeda layers (left/right), which may needs191 * two zorders.192 * - zorder: for left_layer for left display part.193 * - zorder + 1: will be reserved for right layer.194 */195 if (to_kplane_st(plane_st)->layer_split)196 order++;197 198 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] zpos:%d, normalized zpos: %d\n",199 plane->base.id, plane->name,200 plane_st->zpos, plane_st->normalized_zpos);201 202 /* calculate max slave zorder */203 if (has_bit(drm_plane_index(plane), kcrtc->slave_planes)) {204 slave_zpos = plane_st->normalized_zpos;205 if (to_kplane_st(plane_st)->layer_split)206 slave_zpos++;207 kcrtc_st->max_slave_zorder =208 max(slave_zpos, kcrtc_st->max_slave_zorder);209 }210 }211 212 crtc_st->zpos_changed = true;213 214 return 0;215}216 217static int komeda_kms_check(struct drm_device *dev,218 struct drm_atomic_state *state)219{220 struct drm_crtc *crtc;221 struct drm_crtc_state *new_crtc_st;222 int i, err;223 224 err = drm_atomic_helper_check_modeset(dev, state);225 if (err)226 return err;227 228 /* Komeda need to re-calculate resource assumption in every commit229 * so need to add all affected_planes (even unchanged) to230 * drm_atomic_state.231 */232 for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {233 err = drm_atomic_add_affected_planes(state, crtc);234 if (err)235 return err;236 237 err = komeda_crtc_normalize_zpos(crtc, new_crtc_st);238 if (err)239 return err;240 }241 242 err = drm_atomic_helper_check_planes(dev, state);243 if (err)244 return err;245 246 return 0;247}248 249static const struct drm_mode_config_funcs komeda_mode_config_funcs = {250 .fb_create = komeda_fb_create,251 .atomic_check = komeda_kms_check,252 .atomic_commit = drm_atomic_helper_commit,253};254 255static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,256 struct komeda_dev *mdev)257{258 struct drm_mode_config *config = &kms->base.mode_config;259 260 drm_mode_config_init(&kms->base);261 262 komeda_kms_setup_crtcs(kms, mdev);263 264 /* Get value from dev */265 config->min_width = 0;266 config->min_height = 0;267 config->max_width = 4096;268 config->max_height = 4096;269 270 config->funcs = &komeda_mode_config_funcs;271 config->helper_private = &komeda_mode_config_helpers;272}273 274struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)275{276 struct komeda_kms_dev *kms;277 struct drm_device *drm;278 int err;279 280 kms = devm_drm_dev_alloc(mdev->dev, &komeda_kms_driver,281 struct komeda_kms_dev, base);282 if (IS_ERR(kms))283 return kms;284 285 drm = &kms->base;286 287 drm->dev_private = mdev;288 289 komeda_kms_mode_config_init(kms, mdev);290 291 err = komeda_kms_add_private_objs(kms, mdev);292 if (err)293 goto cleanup_mode_config;294 295 err = komeda_kms_add_planes(kms, mdev);296 if (err)297 goto cleanup_mode_config;298 299 err = drm_vblank_init(drm, kms->n_crtcs);300 if (err)301 goto cleanup_mode_config;302 303 err = komeda_kms_add_crtcs(kms, mdev);304 if (err)305 goto cleanup_mode_config;306 307 err = komeda_kms_add_wb_connectors(kms, mdev);308 if (err)309 goto cleanup_mode_config;310 311 drm_mode_config_reset(drm);312 313 err = devm_request_irq(drm->dev, mdev->irq,314 komeda_kms_irq_handler, IRQF_SHARED,315 drm->driver->name, drm);316 if (err)317 goto cleanup_mode_config;318 319 drm_kms_helper_poll_init(drm);320 321 err = drm_dev_register(drm, 0);322 if (err)323 goto free_interrupts;324 325 return kms;326 327free_interrupts:328 drm_kms_helper_poll_fini(drm);329cleanup_mode_config:330 drm_mode_config_cleanup(drm);331 komeda_kms_cleanup_private_objs(kms);332 drm->dev_private = NULL;333 return ERR_PTR(err);334}335 336void komeda_kms_detach(struct komeda_kms_dev *kms)337{338 struct drm_device *drm = &kms->base;339 340 drm_dev_unregister(drm);341 drm_kms_helper_poll_fini(drm);342 drm_atomic_helper_shutdown(drm);343 drm_mode_config_cleanup(drm);344 komeda_kms_cleanup_private_objs(kms);345 drm->dev_private = NULL;346}347 348void komeda_kms_shutdown(struct komeda_kms_dev *kms)349{350 struct drm_device *drm = &kms->base;351 352 drm_atomic_helper_shutdown(drm);353}354