286 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2013 Red Hat4 * Author: Rob Clark <robdclark@gmail.com>5 */6 7#include <drm/drm_crtc.h>8#include <drm/drm_damage_helper.h>9#include <drm/drm_file.h>10#include <drm/drm_fourcc.h>11#include <drm/drm_framebuffer.h>12#include <drm/drm_gem_framebuffer_helper.h>13#include <drm/drm_probe_helper.h>14 15#include "msm_drv.h"16#include "msm_kms.h"17#include "msm_gem.h"18 19struct msm_framebuffer {20 struct drm_framebuffer base;21 const struct msm_format *format;22 23 /* Count of # of attached planes which need dirtyfb: */24 refcount_t dirtyfb;25 26 /* Framebuffer per-plane address, if pinned, else zero: */27 uint64_t iova[DRM_FORMAT_MAX_PLANES];28 atomic_t prepare_count;29};30#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)31 32static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,33 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);34 35static int msm_framebuffer_dirtyfb(struct drm_framebuffer *fb,36 struct drm_file *file_priv, unsigned int flags,37 unsigned int color, struct drm_clip_rect *clips,38 unsigned int num_clips)39{40 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);41 42 /* If this fb is not used on any display requiring pixel data to be43 * flushed, then skip dirtyfb44 */45 if (refcount_read(&msm_fb->dirtyfb) == 1)46 return 0;47 48 return drm_atomic_helper_dirtyfb(fb, file_priv, flags, color,49 clips, num_clips);50}51 52static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {53 .create_handle = drm_gem_fb_create_handle,54 .destroy = drm_gem_fb_destroy,55 .dirty = msm_framebuffer_dirtyfb,56};57 58#ifdef CONFIG_DEBUG_FS59void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)60{61 struct msm_gem_stats stats = {};62 int i, n = fb->format->num_planes;63 64 seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",65 fb->width, fb->height, (char *)&fb->format->format,66 drm_framebuffer_read_refcount(fb), fb->base.id);67 68 for (i = 0; i < n; i++) {69 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",70 i, fb->offsets[i], fb->pitches[i]);71 msm_gem_describe(fb->obj[i], m, &stats);72 }73}74#endif75 76/* prepare/pin all the fb's bo's for scanout.77 */78int msm_framebuffer_prepare(struct drm_framebuffer *fb,79 struct msm_gem_address_space *aspace,80 bool needs_dirtyfb)81{82 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);83 int ret, i, n = fb->format->num_planes;84 85 if (needs_dirtyfb)86 refcount_inc(&msm_fb->dirtyfb);87 88 atomic_inc(&msm_fb->prepare_count);89 90 for (i = 0; i < n; i++) {91 ret = msm_gem_get_and_pin_iova(fb->obj[i], aspace, &msm_fb->iova[i]);92 drm_dbg_state(fb->dev, "FB[%u]: iova[%d]: %08llx (%d)\n",93 fb->base.id, i, msm_fb->iova[i], ret);94 if (ret)95 return ret;96 }97 98 return 0;99}100 101void msm_framebuffer_cleanup(struct drm_framebuffer *fb,102 struct msm_gem_address_space *aspace,103 bool needed_dirtyfb)104{105 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);106 int i, n = fb->format->num_planes;107 108 if (needed_dirtyfb)109 refcount_dec(&msm_fb->dirtyfb);110 111 for (i = 0; i < n; i++)112 msm_gem_unpin_iova(fb->obj[i], aspace);113 114 if (!atomic_dec_return(&msm_fb->prepare_count))115 memset(msm_fb->iova, 0, sizeof(msm_fb->iova));116}117 118uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,119 struct msm_gem_address_space *aspace, int plane)120{121 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);122 return msm_fb->iova[plane] + fb->offsets[plane];123}124 125struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)126{127 return drm_gem_fb_get_obj(fb, plane);128}129 130const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)131{132 struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);133 return msm_fb->format;134}135 136struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,137 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)138{139 const struct drm_format_info *info = drm_get_format_info(dev,140 mode_cmd);141 struct drm_gem_object *bos[4] = {0};142 struct drm_framebuffer *fb;143 int ret, i, n = info->num_planes;144 145 for (i = 0; i < n; i++) {146 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);147 if (!bos[i]) {148 ret = -ENXIO;149 goto out_unref;150 }151 }152 153 fb = msm_framebuffer_init(dev, mode_cmd, bos);154 if (IS_ERR(fb)) {155 ret = PTR_ERR(fb);156 goto out_unref;157 }158 159 return fb;160 161out_unref:162 for (i = 0; i < n; i++)163 drm_gem_object_put(bos[i]);164 return ERR_PTR(ret);165}166 167static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,168 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)169{170 const struct drm_format_info *info = drm_get_format_info(dev,171 mode_cmd);172 struct msm_drm_private *priv = dev->dev_private;173 struct msm_kms *kms = priv->kms;174 struct msm_framebuffer *msm_fb = NULL;175 struct drm_framebuffer *fb;176 const struct msm_format *format;177 int ret, i, n;178 179 drm_dbg_state(dev, "create framebuffer: mode_cmd=%p (%dx%d@%p4cc)\n",180 mode_cmd, mode_cmd->width, mode_cmd->height,181 &mode_cmd->pixel_format);182 183 n = info->num_planes;184 format = mdp_get_format(kms, mode_cmd->pixel_format,185 mode_cmd->modifier[0]);186 if (!format) {187 DRM_DEV_ERROR(dev->dev, "unsupported pixel format: %p4cc\n",188 &mode_cmd->pixel_format);189 ret = -EINVAL;190 goto fail;191 }192 193 msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);194 if (!msm_fb) {195 ret = -ENOMEM;196 goto fail;197 }198 199 fb = &msm_fb->base;200 201 msm_fb->format = format;202 203 if (n > ARRAY_SIZE(fb->obj)) {204 ret = -EINVAL;205 goto fail;206 }207 208 for (i = 0; i < n; i++) {209 unsigned int width = mode_cmd->width / (i ? info->hsub : 1);210 unsigned int height = mode_cmd->height / (i ? info->vsub : 1);211 unsigned int min_size;212 213 min_size = (height - 1) * mode_cmd->pitches[i]214 + width * info->cpp[i]215 + mode_cmd->offsets[i];216 217 if (bos[i]->size < min_size) {218 ret = -EINVAL;219 goto fail;220 }221 222 msm_fb->base.obj[i] = bos[i];223 }224 225 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);226 227 ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);228 if (ret) {229 DRM_DEV_ERROR(dev->dev, "framebuffer init failed: %d\n", ret);230 goto fail;231 }232 233 refcount_set(&msm_fb->dirtyfb, 1);234 235 drm_dbg_state(dev, "create: FB ID: %d (%p)\n", fb->base.id, fb);236 237 return fb;238 239fail:240 kfree(msm_fb);241 242 return ERR_PTR(ret);243}244 245struct drm_framebuffer *246msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)247{248 struct drm_mode_fb_cmd2 mode_cmd = {249 .pixel_format = format,250 .width = w,251 .height = h,252 .pitches = { p },253 };254 struct drm_gem_object *bo;255 struct drm_framebuffer *fb;256 int size;257 258 /* allocate backing bo */259 size = mode_cmd.pitches[0] * mode_cmd.height;260 DBG("allocating %d bytes for fb %d", size, dev->primary->index);261 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);262 if (IS_ERR(bo)) {263 dev_warn(dev->dev, "could not allocate stolen bo\n");264 /* try regular bo: */265 bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);266 }267 if (IS_ERR(bo)) {268 DRM_DEV_ERROR(dev->dev, "failed to allocate buffer object\n");269 return ERR_CAST(bo);270 }271 272 msm_gem_object_set_name(bo, "stolenfb");273 274 fb = msm_framebuffer_init(dev, &mode_cmd, &bo);275 if (IS_ERR(fb)) {276 DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");277 /* note: if fb creation failed, we can't rely on fb destroy278 * to unref the bo:279 */280 drm_gem_object_put(bo);281 return ERR_CAST(fb);282 }283 284 return fb;285}286