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