C++ (Cpp) armada_framebuffer_create Examples

Example #1

File: armada_fb.c Project: 0x000000FF/edison-linux

static struct drm_framebuffer *armada_fb_create(struct drm_device *dev,
	struct drm_file *dfile, struct drm_mode_fb_cmd2 *mode)
{
	struct armada_gem_object *obj;
	struct armada_framebuffer *dfb;
	int ret;

	DRM_DEBUG_DRIVER("w%u h%u pf%08x f%u p%u,%u,%u\n",
		mode->width, mode->height, mode->pixel_format,
		mode->flags, mode->pitches[0], mode->pitches[1],
		mode->pitches[2]);

	/* We can only handle a single plane at the moment */
	if (drm_format_num_planes(mode->pixel_format) > 1 &&
	    (mode->handles[0] != mode->handles[1] ||
	     mode->handles[0] != mode->handles[2])) {
		ret = -EINVAL;
		goto err;
	}

	obj = armada_gem_object_lookup(dev, dfile, mode->handles[0]);
	if (!obj) {
		ret = -ENOENT;
		goto err;
	}

	if (obj->obj.import_attach && !obj->sgt) {
		ret = armada_gem_map_import(obj);
		if (ret)
			goto err_unref;
	}

	/* Framebuffer objects must have a valid device address for scanout */
	if (obj->dev_addr == DMA_ERROR_CODE) {
		ret = -EINVAL;
		goto err_unref;
	}

	dfb = armada_framebuffer_create(dev, mode, obj);
	if (IS_ERR(dfb)) {
		ret = PTR_ERR(dfb);
		goto err;
	}

	drm_gem_object_unreference_unlocked(&obj->obj);

	return &dfb->fb;

 err_unref:
	drm_gem_object_unreference_unlocked(&obj->obj);
 err:
	DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
	return ERR_PTR(ret);
}

Example #2

File: armada_fbdev.c Project: mkahola/drm-intel-mika

static int armada_fb_create(struct drm_fb_helper *fbh,
	struct drm_fb_helper_surface_size *sizes)
{
	struct drm_device *dev = fbh->dev;
	struct drm_mode_fb_cmd2 mode;
	struct armada_framebuffer *dfb;
	struct armada_gem_object *obj;
	struct fb_info *info;
	int size, ret;
	void *ptr;

	memset(&mode, 0, sizeof(mode));
	mode.width = sizes->surface_width;
	mode.height = sizes->surface_height;
	mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
	mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
					sizes->surface_depth);

	size = mode.pitches[0] * mode.height;
	obj = armada_gem_alloc_private_object(dev, size);
	if (!obj) {
		DRM_ERROR("failed to allocate fb memory\n");
		return -ENOMEM;
	}

	ret = armada_gem_linear_back(dev, obj);
	if (ret) {
		drm_gem_object_unreference_unlocked(&obj->obj);
		return ret;
	}

	ptr = armada_gem_map_object(dev, obj);
	if (!ptr) {
		drm_gem_object_unreference_unlocked(&obj->obj);
		return -ENOMEM;
	}

	dfb = armada_framebuffer_create(dev, &mode, obj);

	/*
	 * A reference is now held by the framebuffer object if
	 * successful, otherwise this drops the ref for the error path.
	 */
	drm_gem_object_unreference_unlocked(&obj->obj);

	if (IS_ERR(dfb))
		return PTR_ERR(dfb);

	info = drm_fb_helper_alloc_fbi(fbh);
	if (IS_ERR(info)) {
		ret = PTR_ERR(info);
		goto err_fballoc;
	}

	strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
	info->par = fbh;
	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
	info->fbops = &armada_fb_ops;
	info->fix.smem_start = obj->phys_addr;
	info->fix.smem_len = obj->obj.size;
	info->screen_size = obj->obj.size;
	info->screen_base = ptr;
	fbh->fb = &dfb->fb;

	drm_fb_helper_fill_fix(info, dfb->fb.pitches[0],
			       dfb->fb.format->depth);
	drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);

	DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
		dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
		(unsigned long long)obj->phys_addr);

	return 0;

 err_fballoc:
	dfb->fb.funcs->destroy(&dfb->fb);
	return ret;
}