/* * 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 <drm/drm_crtc.h>#include <drm/drm_fb_helper.h> #include "msm_drv.h"#include "msm_gem.h"#include "msm_kms.h" extern int msm_gem_mmap_obj(struct drm_gem_object *obj,					struct vm_area_struct *vma);static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma); /* * fbdev funcs, to implement legacy fbdev interface on top of drm driver */ #define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base) struct msm_fbdev {	struct drm_fb_helper base;	struct drm_framebuffer *fb;	struct drm_gem_object *bo;}; static struct fb_ops msm_fb_ops = {	.owner = THIS_MODULE,	DRM_FB_HELPER_DEFAULT_OPS, 	/* Note: to properly handle manual update displays, we wrap the	 * basic fbdev ops which write to the framebuffer	 */	.fb_read = drm_fb_helper_sys_read,	.fb_write = drm_fb_helper_sys_write,	.fb_fillrect = drm_fb_helper_sys_fillrect,	.fb_copyarea = drm_fb_helper_sys_copyarea,	.fb_imageblit = drm_fb_helper_sys_imageblit,	.fb_mmap = msm_fbdev_mmap,}; static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma){	struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;	struct msm_fbdev *fbdev = to_msm_fbdev(helper);	struct drm_gem_object *drm_obj = fbdev->bo;	int ret = 0; 	ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);	if (ret) {		pr_err("%s:drm_gem_mmap_obj fail\n", __func__);		return ret;	} 	return msm_gem_mmap_obj(drm_obj, vma);} static int msm_fbdev_create(struct drm_fb_helper *helper,		struct drm_fb_helper_surface_size *sizes){	struct msm_fbdev *fbdev = to_msm_fbdev(helper);	struct drm_device *dev = helper->dev;	struct msm_drm_private *priv = dev->dev_private;	struct drm_framebuffer *fb = NULL;	struct fb_info *fbi = NULL;	struct drm_mode_fb_cmd2 mode_cmd = {0};	uint64_t paddr;	int ret, size; 	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,			sizes->surface_height, sizes->surface_bpp,			sizes->fb_width, sizes->fb_height); 	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,			sizes->surface_depth); 	mode_cmd.width = sizes->surface_width;	mode_cmd.height = sizes->surface_height; 	mode_cmd.pitches[0] = align_pitch(			mode_cmd.width, sizes->surface_bpp); 	/* allocate backing bo */	size = mode_cmd.pitches[0] * mode_cmd.height;	DBG("allocating %d bytes for fb %d", size, dev->primary->index);	fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT |			MSM_BO_WC | MSM_BO_STOLEN);	if (IS_ERR(fbdev->bo)) {		ret = PTR_ERR(fbdev->bo);		fbdev->bo = NULL;		dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret);		goto fail;	} 	fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo);	if (IS_ERR(fb)) {		dev_err(dev->dev, "failed to allocate fb\n");		/* note: if fb creation failed, we can't rely on fb destroy		 * to unref the bo:		 */		drm_gem_object_unreference_unlocked(fbdev->bo);		ret = PTR_ERR(fb);		goto fail;	} 	mutex_lock(&dev->struct_mutex); 	/*	 * NOTE: if we can be guaranteed to be able to map buffer	 * in panic (ie. lock-safe, etc) we could avoid pinning the	 * buffer now:	 */	ret = msm_gem_get_iova(fbdev->bo, priv->kms->aspace, &paddr);	if (ret) {		dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);		goto fail_unlock;	} 	fbi = drm_fb_helper_alloc_fbi(helper);	if (IS_ERR(fbi)) {		dev_err(dev->dev, "failed to allocate fb info\n");		ret = PTR_ERR(fbi);		goto fail_unlock;	} 	DBG("fbi=%p, dev=%p", fbi, dev); 	fbdev->fb = fb;	helper->fb = fb; 	fbi->par = helper;	fbi->flags = FBINFO_DEFAULT;	fbi->fbops = &msm_fb_ops; 	strcpy(fbi->fix.id, "msm"); 	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height); 	dev->mode_config.fb_base = paddr; 	fbi->screen_base = msm_gem_get_vaddr(fbdev->bo);	if (IS_ERR(fbi->screen_base)) {		ret = PTR_ERR(fbi->screen_base);		goto fail_unlock;	}	fbi->screen_size = fbdev->bo->size;	fbi->fix.smem_start = paddr;	fbi->fix.smem_len = fbdev->bo->size; 	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height); 	mutex_unlock(&dev->struct_mutex); 	return 0; fail_unlock:	mutex_unlock(&dev->struct_mutex);fail: 	if (ret) {		if (fb)			drm_framebuffer_remove(fb);	} 	return ret;} static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {	.fb_probe = msm_fbdev_create,}; /* initialize fbdev helper */struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev){	struct msm_drm_private *priv = dev->dev_private;	struct msm_fbdev *fbdev = NULL;	struct drm_fb_helper *helper;	int ret; 	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);	if (!fbdev)		goto fail; 	helper = &fbdev->base; 	drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs); 	ret = drm_fb_helper_init(dev, helper, priv->num_connectors);	if (ret) {		dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);		goto fail;	} 	ret = drm_fb_helper_single_add_all_connectors(helper);	if (ret)		goto fini; 	ret = drm_fb_helper_initial_config(helper, 32);	if (ret)		goto fini; 	priv->fbdev = helper; 	return helper; fini:	drm_fb_helper_fini(helper);fail:	kfree(fbdev);	return NULL;} void msm_fbdev_free(struct drm_device *dev){	struct msm_drm_private *priv = dev->dev_private;	struct drm_fb_helper *helper = priv->fbdev;	struct msm_fbdev *fbdev; 	DBG(); 	drm_fb_helper_unregister_fbi(helper); 	drm_fb_helper_fini(helper); 	fbdev = to_msm_fbdev(priv->fbdev); 	/* this will free the backing object */	if (fbdev->fb) {		msm_gem_put_vaddr(fbdev->bo);		drm_framebuffer_remove(fbdev->fb);	} 	kfree(fbdev); 	priv->fbdev = NULL;}