283 lines
7.5 KiB
C
283 lines
7.5 KiB
C
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include "msm_drv.h"
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#include "msm_kms.h"
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#include "msm_gem.h"
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struct msm_framebuffer {
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struct drm_framebuffer base;
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const struct msm_format *format;
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struct drm_gem_object *planes[MAX_PLANE];
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};
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#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)
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static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos);
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static int msm_framebuffer_create_handle(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int *handle)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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return drm_gem_handle_create(file_priv,
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msm_fb->planes[0], handle);
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}
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static void msm_framebuffer_destroy(struct drm_framebuffer *fb)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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int i, n = fb->format->num_planes;
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DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
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drm_framebuffer_cleanup(fb);
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for (i = 0; i < n; i++) {
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struct drm_gem_object *bo = msm_fb->planes[i];
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drm_gem_object_unreference_unlocked(bo);
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}
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kfree(msm_fb);
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}
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static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {
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.create_handle = msm_framebuffer_create_handle,
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.destroy = msm_framebuffer_destroy,
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};
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#ifdef CONFIG_DEBUG_FS
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void msm_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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int i, n = fb->format->num_planes;
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seq_printf(m, "fb: %dx%d@%4.4s (%2d, ID:%d)\n",
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fb->width, fb->height, (char *)&fb->format->format,
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drm_framebuffer_read_refcount(fb), fb->base.id);
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for (i = 0; i < n; i++) {
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seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
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i, fb->offsets[i], fb->pitches[i]);
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msm_gem_describe(msm_fb->planes[i], m);
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}
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}
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#endif
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/* prepare/pin all the fb's bo's for scanout. Note that it is not valid
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* to prepare an fb more multiple different initiator 'id's. But that
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* should be fine, since only the scanout (mdpN) side of things needs
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* this, the gpu doesn't care about fb's.
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*/
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int msm_framebuffer_prepare(struct drm_framebuffer *fb,
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struct msm_gem_address_space *aspace)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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int ret, i, n = fb->format->num_planes;
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uint64_t iova;
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for (i = 0; i < n; i++) {
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ret = msm_gem_get_iova(msm_fb->planes[i], aspace, &iova);
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DBG("FB[%u]: iova[%d]: %08llx (%d)", fb->base.id, i, iova, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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void msm_framebuffer_cleanup(struct drm_framebuffer *fb,
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struct msm_gem_address_space *aspace)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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int i, n = fb->format->num_planes;
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for (i = 0; i < n; i++)
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msm_gem_put_iova(msm_fb->planes[i], aspace);
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}
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uint32_t msm_framebuffer_iova(struct drm_framebuffer *fb,
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struct msm_gem_address_space *aspace, int plane)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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if (!msm_fb->planes[plane])
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return 0;
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return msm_gem_iova(msm_fb->planes[plane], aspace) + fb->offsets[plane];
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}
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struct drm_gem_object *msm_framebuffer_bo(struct drm_framebuffer *fb, int plane)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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return msm_fb->planes[plane];
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}
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const struct msm_format *msm_framebuffer_format(struct drm_framebuffer *fb)
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{
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struct msm_framebuffer *msm_fb = to_msm_framebuffer(fb);
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return msm_fb->format;
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}
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struct drm_framebuffer *msm_framebuffer_create(struct drm_device *dev,
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struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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struct drm_gem_object *bos[4] = {0};
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struct drm_framebuffer *fb;
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int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
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for (i = 0; i < n; i++) {
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bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
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if (!bos[i]) {
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ret = -ENXIO;
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goto out_unref;
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}
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}
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fb = msm_framebuffer_init(dev, mode_cmd, bos);
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if (IS_ERR(fb)) {
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ret = PTR_ERR(fb);
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goto out_unref;
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}
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return fb;
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out_unref:
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for (i = 0; i < n; i++)
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drm_gem_object_unreference_unlocked(bos[i]);
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return ERR_PTR(ret);
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}
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static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
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{
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struct msm_drm_private *priv = dev->dev_private;
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struct msm_kms *kms = priv->kms;
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struct msm_framebuffer *msm_fb = NULL;
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struct drm_framebuffer *fb;
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const struct msm_format *format;
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int ret, i, n;
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unsigned int hsub, vsub;
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DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
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dev, mode_cmd, mode_cmd->width, mode_cmd->height,
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(char *)&mode_cmd->pixel_format);
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n = drm_format_num_planes(mode_cmd->pixel_format);
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hsub = drm_format_horz_chroma_subsampling(mode_cmd->pixel_format);
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vsub = drm_format_vert_chroma_subsampling(mode_cmd->pixel_format);
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format = kms->funcs->get_format(kms, mode_cmd->pixel_format);
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if (!format) {
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dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
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(char *)&mode_cmd->pixel_format);
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ret = -EINVAL;
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goto fail;
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}
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msm_fb = kzalloc(sizeof(*msm_fb), GFP_KERNEL);
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if (!msm_fb) {
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ret = -ENOMEM;
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goto fail;
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}
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fb = &msm_fb->base;
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msm_fb->format = format;
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if (n > ARRAY_SIZE(msm_fb->planes)) {
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ret = -EINVAL;
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goto fail;
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}
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for (i = 0; i < n; i++) {
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unsigned int width = mode_cmd->width / (i ? hsub : 1);
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unsigned int height = mode_cmd->height / (i ? vsub : 1);
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unsigned int min_size;
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min_size = (height - 1) * mode_cmd->pitches[i]
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+ width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
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+ mode_cmd->offsets[i];
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if (bos[i]->size < min_size) {
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ret = -EINVAL;
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goto fail;
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}
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msm_fb->planes[i] = bos[i];
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}
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drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
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ret = drm_framebuffer_init(dev, fb, &msm_framebuffer_funcs);
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if (ret) {
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dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
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goto fail;
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}
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DBG("create: FB ID: %d (%p)", fb->base.id, fb);
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return fb;
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fail:
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kfree(msm_fb);
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return ERR_PTR(ret);
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}
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struct drm_framebuffer *
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msm_alloc_stolen_fb(struct drm_device *dev, int w, int h, int p, uint32_t format)
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{
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struct drm_mode_fb_cmd2 mode_cmd = {
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.pixel_format = format,
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.width = w,
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.height = h,
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.pitches = { p },
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};
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struct drm_gem_object *bo;
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struct drm_framebuffer *fb;
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int size;
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/* allocate backing bo */
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size = mode_cmd.pitches[0] * mode_cmd.height;
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DBG("allocating %d bytes for fb %d", size, dev->primary->index);
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bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN);
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if (IS_ERR(bo)) {
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dev_warn(dev->dev, "could not allocate stolen bo\n");
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/* try regular bo: */
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bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC);
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}
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if (IS_ERR(bo)) {
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dev_err(dev->dev, "failed to allocate buffer object\n");
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return ERR_CAST(bo);
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}
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fb = msm_framebuffer_init(dev, &mode_cmd, &bo);
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if (IS_ERR(fb)) {
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dev_err(dev->dev, "failed to allocate fb\n");
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/* note: if fb creation failed, we can't rely on fb destroy
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* to unref the bo:
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*/
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drm_gem_object_unreference_unlocked(bo);
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return ERR_CAST(fb);
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}
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return fb;
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}
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