// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> */ #include <drm/drm_crtc.h>#include <drm/drm_fb_helper.h>#include <drm/drm_fourcc.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;}; static const 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 *bo = msm_framebuffer_bo(fbdev->fb, 0);	int ret = 0; 	ret = drm_gem_mmap_obj(bo, bo->size, vma);	if (ret) {		pr_err("%s:drm_gem_mmap_obj fail\n", __func__);		return ret;	} 	return msm_gem_mmap_obj(bo, 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 drm_gem_object *bo;	struct fb_info *fbi = NULL;	uint64_t paddr;	uint32_t format;	int ret, pitch; 	format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); 	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,			sizes->surface_height, sizes->surface_bpp,			sizes->fb_width, sizes->fb_height); 	pitch = align_pitch(sizes->surface_width, sizes->surface_bpp);	fb = msm_alloc_stolen_fb(dev, sizes->surface_width,			sizes->surface_height, pitch, format); 	if (IS_ERR(fb)) {		DRM_DEV_ERROR(dev->dev, "failed to allocate fb\n");		return PTR_ERR(fb);	} 	bo = msm_framebuffer_bo(fb, 0); 	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_and_pin_iova(bo, priv->kms->aspace, &paddr);	if (ret) {		DRM_DEV_ERROR(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)) {		DRM_DEV_ERROR(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->fbops = &msm_fb_ops; 	drm_fb_helper_fill_info(fbi, helper, sizes); 	dev->mode_config.fb_base = paddr; 	fbi->screen_base = msm_gem_get_vaddr(bo);	if (IS_ERR(fbi->screen_base)) {		ret = PTR_ERR(fbi->screen_base);		goto fail_unlock;	}	fbi->screen_size = bo->size;	fbi->fix.smem_start = paddr;	fbi->fix.smem_len = 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);	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);	if (ret) {		DRM_DEV_ERROR(dev->dev, "could not init fbdev: ret=%d\n", ret);		goto fail;	} 	/* the fw fb could be anywhere in memory */	drm_fb_helper_remove_conflicting_framebuffers(NULL, "msm", false); 	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) {		struct drm_gem_object *bo =			msm_framebuffer_bo(fbdev->fb, 0);		msm_gem_put_vaddr(bo);		drm_framebuffer_remove(fbdev->fb);	} 	kfree(fbdev); 	priv->fbdev = NULL;}