460 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/4 * Author: Rob Clark <rob@ti.com>5 */6 7#include <linux/dma-mapping.h>8#include <linux/seq_file.h>9 10#include <drm/drm_blend.h>11#include <drm/drm_modeset_helper.h>12#include <drm/drm_fourcc.h>13#include <drm/drm_framebuffer.h>14#include <drm/drm_gem_framebuffer_helper.h>15 16#include "omap_dmm_tiler.h"17#include "omap_drv.h"18 19/*20 * framebuffer funcs21 */22 23static const u32 formats[] = {24 /* 16bpp [A]RGB: */25 DRM_FORMAT_RGB565, /* RGB16-565 */26 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */27 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */28 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */29 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */30 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */31 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */32 /* 24bpp RGB: */33 DRM_FORMAT_RGB888, /* RGB24-888 */34 /* 32bpp [A]RGB: */35 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */36 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */37 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */38 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */39 /* YUV: */40 DRM_FORMAT_NV12,41 DRM_FORMAT_YUYV,42 DRM_FORMAT_UYVY,43};44 45/* per-plane info for the fb: */46struct plane {47 dma_addr_t dma_addr;48};49 50#define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)51 52struct omap_framebuffer {53 struct drm_framebuffer base;54 int pin_count;55 const struct drm_format_info *format;56 struct plane planes[2];57 /* lock for pinning (pin_count and planes.dma_addr) */58 struct mutex lock;59};60 61static int omap_framebuffer_dirty(struct drm_framebuffer *fb,62 struct drm_file *file_priv,63 unsigned flags, unsigned color,64 struct drm_clip_rect *clips,65 unsigned num_clips)66{67 struct drm_crtc *crtc;68 69 drm_modeset_lock_all(fb->dev);70 71 drm_for_each_crtc(crtc, fb->dev)72 omap_crtc_flush(crtc);73 74 drm_modeset_unlock_all(fb->dev);75 76 return 0;77}78 79static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {80 .create_handle = drm_gem_fb_create_handle,81 .dirty = omap_framebuffer_dirty,82 .destroy = drm_gem_fb_destroy,83};84 85static u32 get_linear_addr(struct drm_framebuffer *fb,86 const struct drm_format_info *format, int n, int x, int y)87{88 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);89 struct plane *plane = &omap_fb->planes[n];90 u32 offset;91 92 offset = fb->offsets[n]93 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))94 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));95 96 return plane->dma_addr + offset;97}98 99bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)100{101 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK;102}103 104/* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */105static u32 drm_rotation_to_tiler(unsigned int drm_rot)106{107 u32 orient;108 109 switch (drm_rot & DRM_MODE_ROTATE_MASK) {110 default:111 case DRM_MODE_ROTATE_0:112 orient = 0;113 break;114 case DRM_MODE_ROTATE_90:115 orient = MASK_XY_FLIP | MASK_X_INVERT;116 break;117 case DRM_MODE_ROTATE_180:118 orient = MASK_X_INVERT | MASK_Y_INVERT;119 break;120 case DRM_MODE_ROTATE_270:121 orient = MASK_XY_FLIP | MASK_Y_INVERT;122 break;123 }124 125 if (drm_rot & DRM_MODE_REFLECT_X)126 orient ^= MASK_X_INVERT;127 128 if (drm_rot & DRM_MODE_REFLECT_Y)129 orient ^= MASK_Y_INVERT;130 131 return orient;132}133 134/* update ovl info for scanout, handles cases of multi-planar fb's, etc.135 */136void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,137 struct drm_plane_state *state,138 struct omap_overlay_info *info,139 struct omap_overlay_info *r_info)140{141 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);142 const struct drm_format_info *format = omap_fb->format;143 u32 x, y, orient = 0;144 145 info->fourcc = fb->format->format;146 147 info->pos_x = state->crtc_x;148 info->pos_y = state->crtc_y;149 info->out_width = state->crtc_w;150 info->out_height = state->crtc_h;151 info->width = state->src_w >> 16;152 info->height = state->src_h >> 16;153 154 /* DSS driver wants the w & h in rotated orientation */155 if (drm_rotation_90_or_270(state->rotation))156 swap(info->width, info->height);157 158 x = state->src_x >> 16;159 y = state->src_y >> 16;160 161 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) {162 u32 w = state->src_w >> 16;163 u32 h = state->src_h >> 16;164 165 orient = drm_rotation_to_tiler(state->rotation);166 167 /*168 * omap_gem_rotated_paddr() wants the x & y in tiler units.169 * Usually tiler unit size is the same as the pixel size, except170 * for YUV422 formats, for which the tiler unit size is 32 bits171 * and pixel size is 16 bits.172 */173 if (fb->format->format == DRM_FORMAT_UYVY ||174 fb->format->format == DRM_FORMAT_YUYV) {175 x /= 2;176 w /= 2;177 }178 179 /* adjust x,y offset for invert: */180 if (orient & MASK_Y_INVERT)181 y += h - 1;182 if (orient & MASK_X_INVERT)183 x += w - 1;184 185 /* Note: x and y are in TILER units, not pixels */186 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,187 &info->paddr);188 info->rotation_type = OMAP_DSS_ROT_TILER;189 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;190 /* Note: stride in TILER units, not pixels */191 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);192 } else {193 switch (state->rotation & DRM_MODE_ROTATE_MASK) {194 case 0:195 case DRM_MODE_ROTATE_0:196 /* OK */197 break;198 199 default:200 dev_warn(fb->dev->dev,201 "rotation '%d' ignored for non-tiled fb\n",202 state->rotation);203 break;204 }205 206 info->paddr = get_linear_addr(fb, format, 0, x, y);207 info->rotation_type = OMAP_DSS_ROT_NONE;208 info->rotation = DRM_MODE_ROTATE_0;209 info->screen_width = fb->pitches[0];210 }211 212 /* convert to pixels: */213 info->screen_width /= format->cpp[0];214 215 if (fb->format->format == DRM_FORMAT_NV12) {216 if (info->rotation_type == OMAP_DSS_ROT_TILER) {217 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK));218 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,219 &info->p_uv_addr);220 } else {221 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);222 }223 } else {224 info->p_uv_addr = 0;225 }226 227 if (r_info) {228 info->width /= 2;229 info->out_width /= 2;230 231 *r_info = *info;232 233 if (fb->format->is_yuv) {234 if (info->width & 1) {235 info->width++;236 r_info->width--;237 }238 239 if (info->out_width & 1) {240 info->out_width++;241 r_info->out_width--;242 }243 }244 245 r_info->pos_x = info->pos_x + info->out_width;246 247 r_info->paddr = get_linear_addr(fb, format, 0,248 x + info->width, y);249 if (fb->format->format == DRM_FORMAT_NV12) {250 r_info->p_uv_addr =251 get_linear_addr(fb, format, 1,252 x + info->width, y);253 }254 }255}256 257/* pin, prepare for scanout: */258int omap_framebuffer_pin(struct drm_framebuffer *fb)259{260 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);261 int ret, i, n = fb->format->num_planes;262 263 mutex_lock(&omap_fb->lock);264 265 if (omap_fb->pin_count > 0) {266 omap_fb->pin_count++;267 mutex_unlock(&omap_fb->lock);268 return 0;269 }270 271 for (i = 0; i < n; i++) {272 struct plane *plane = &omap_fb->planes[i];273 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);274 if (ret)275 goto fail;276 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);277 }278 279 omap_fb->pin_count++;280 281 mutex_unlock(&omap_fb->lock);282 283 return 0;284 285fail:286 for (i--; i >= 0; i--) {287 struct plane *plane = &omap_fb->planes[i];288 omap_gem_unpin(fb->obj[i]);289 plane->dma_addr = 0;290 }291 292 mutex_unlock(&omap_fb->lock);293 294 return ret;295}296 297/* unpin, no longer being scanned out: */298void omap_framebuffer_unpin(struct drm_framebuffer *fb)299{300 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);301 int i, n = fb->format->num_planes;302 303 mutex_lock(&omap_fb->lock);304 305 omap_fb->pin_count--;306 307 if (omap_fb->pin_count > 0) {308 mutex_unlock(&omap_fb->lock);309 return;310 }311 312 for (i = 0; i < n; i++) {313 struct plane *plane = &omap_fb->planes[i];314 omap_gem_unpin(fb->obj[i]);315 plane->dma_addr = 0;316 }317 318 mutex_unlock(&omap_fb->lock);319}320 321#ifdef CONFIG_DEBUG_FS322void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)323{324 int i, n = fb->format->num_planes;325 326 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,327 (char *)&fb->format->format);328 329 for (i = 0; i < n; i++) {330 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",331 i, fb->offsets[n], fb->pitches[i]);332 omap_gem_describe(fb->obj[i], m);333 }334}335#endif336 337struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,338 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)339{340 const struct drm_format_info *info = drm_get_format_info(dev,341 mode_cmd);342 unsigned int num_planes = info->num_planes;343 struct drm_gem_object *bos[4];344 struct drm_framebuffer *fb;345 int i;346 347 for (i = 0; i < num_planes; i++) {348 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);349 if (!bos[i]) {350 fb = ERR_PTR(-ENOENT);351 goto error;352 }353 }354 355 fb = omap_framebuffer_init(dev, mode_cmd, bos);356 if (IS_ERR(fb))357 goto error;358 359 return fb;360 361error:362 while (--i >= 0)363 drm_gem_object_put(bos[i]);364 365 return fb;366}367 368struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,369 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)370{371 const struct drm_format_info *format = NULL;372 struct omap_framebuffer *omap_fb = NULL;373 struct drm_framebuffer *fb = NULL;374 unsigned int pitch = mode_cmd->pitches[0];375 int ret, i;376 377 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",378 dev, mode_cmd, mode_cmd->width, mode_cmd->height,379 (char *)&mode_cmd->pixel_format);380 381 format = drm_get_format_info(dev, mode_cmd);382 383 for (i = 0; i < ARRAY_SIZE(formats); i++) {384 if (formats[i] == mode_cmd->pixel_format)385 break;386 }387 388 if (!format || i == ARRAY_SIZE(formats)) {389 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",390 (char *)&mode_cmd->pixel_format);391 ret = -EINVAL;392 goto fail;393 }394 395 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);396 if (!omap_fb) {397 ret = -ENOMEM;398 goto fail;399 }400 401 fb = &omap_fb->base;402 omap_fb->format = format;403 mutex_init(&omap_fb->lock);404 405 /*406 * The code below assumes that no format use more than two planes, and407 * that the two planes of multiplane formats need the same number of408 * bytes per pixel.409 */410 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {411 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");412 ret = -EINVAL;413 goto fail;414 }415 416 if (pitch % format->cpp[0]) {417 dev_dbg(dev->dev,418 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",419 pitch, format->cpp[0]);420 ret = -EINVAL;421 goto fail;422 }423 424 for (i = 0; i < format->num_planes; i++) {425 struct plane *plane = &omap_fb->planes[i];426 unsigned int vsub = i == 0 ? 1 : format->vsub;427 unsigned int size;428 429 size = pitch * mode_cmd->height / vsub;430 431 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {432 dev_dbg(dev->dev,433 "provided buffer object is too small! %zu < %d\n",434 bos[i]->size - mode_cmd->offsets[i], size);435 ret = -EINVAL;436 goto fail;437 }438 439 fb->obj[i] = bos[i];440 plane->dma_addr = 0;441 }442 443 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);444 445 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);446 if (ret) {447 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);448 goto fail;449 }450 451 DBG("create: FB ID: %d (%p)", fb->base.id, fb);452 453 return fb;454 455fail:456 kfree(omap_fb);457 458 return ERR_PTR(ret);459}460