// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2013 Red Hat * Author: Rob Clark <robdclark@gmail.com> */ #include <linux/fb.h> #include <drm/drm_drv.h>#include <drm/drm_crtc_helper.h>#include <drm/drm_fb_helper.h>#include <drm/drm_file.h>#include <drm/drm_fourcc.h>#include <drm/drm_framebuffer.h>#include <drm/drm_prime.h> #include "msm_drv.h"#include "msm_gem.h"#include "msm_kms.h" static bool fbdev = true;MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");module_param(fbdev, bool, 0600); /* * fbdev funcs, to implement legacy fbdev interface on top of drm driver */ FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(msm_fbdev,				   drm_fb_helper_damage_range,				   drm_fb_helper_damage_area) 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 drm_gem_object *bo = msm_framebuffer_bo(helper->fb, 0); 	return drm_gem_prime_mmap(bo, vma);} static void msm_fbdev_fb_destroy(struct fb_info *info){	struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;	struct drm_gem_object *bo = msm_framebuffer_bo(helper->fb, 0); 	DBG(); 	drm_fb_helper_fini(helper); 	msm_gem_put_vaddr(bo); 	drm_client_buffer_delete(helper->buffer);	drm_client_release(&helper->client);} static const struct fb_ops msm_fb_ops = {	.owner = THIS_MODULE,	__FB_DEFAULT_DEFERRED_OPS_RDWR(msm_fbdev),	DRM_FB_HELPER_DEFAULT_OPS,	__FB_DEFAULT_DEFERRED_OPS_DRAW(msm_fbdev),	.fb_mmap = msm_fbdev_mmap,	.fb_destroy = msm_fbdev_fb_destroy,}; static int msm_fbdev_fb_dirty(struct drm_fb_helper *helper,			      struct drm_clip_rect *clip){	struct drm_device *dev = helper->dev;	int ret; 	/* Call damage handlers only if necessary */	if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))		return 0; 	if (helper->fb->funcs->dirty) {		ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);		if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))			return ret;	} 	return 0;} static const struct drm_fb_helper_funcs msm_fbdev_helper_funcs = {	.fb_dirty = msm_fbdev_fb_dirty,}; int msm_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper,				 struct drm_fb_helper_surface_size *sizes){	struct drm_client_dev *client = &helper->client;	struct drm_device *dev = client->dev;	struct drm_file *file = client->file;	struct msm_drm_private *priv = dev->dev_private;	struct fb_info *fbi = helper->info;	const struct drm_format_info *format;	u32 fourcc, pitch, handle;	u64 size;	struct drm_gem_object *bo;	struct drm_client_buffer *buffer;	uint64_t paddr;	int ret; 	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,			sizes->surface_height, sizes->surface_bpp,			sizes->fb_width, sizes->fb_height); 	fourcc = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);	format = drm_get_format_info(dev, fourcc, DRM_FORMAT_MOD_LINEAR);	/* adreno needs pitch aligned to 32 pixels: */	pitch = drm_format_info_min_pitch(format, 0, ALIGN(sizes->surface_width, 32));	size = ALIGN(pitch * sizes->surface_height, PAGE_SIZE); 	/* allocate backing bo */	DBG("allocating %llu bytes for fb %d", size, dev->primary->index);	bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC | MSM_BO_STOLEN, NULL);	if (IS_ERR(bo)) {		drm_warn(dev, "could not allocate stolen bo\n");		/* try regular bo: */		bo = msm_gem_new(dev, size, MSM_BO_SCANOUT | MSM_BO_WC, NULL);		if (IS_ERR(bo)) {			drm_err(dev, "failed to allocate buffer object\n");			return PTR_ERR(bo);		}	} 	msm_gem_object_set_name(bo, "stolenfb"); 	ret = drm_gem_handle_create(file, bo, &handle);	if (ret)		goto err_drm_gem_object_put; 	buffer = drm_client_buffer_create(client, sizes->surface_width, sizes->surface_height,					  fourcc, handle, pitch);	if (IS_ERR(buffer)) {		ret = PTR_ERR(buffer);		goto err_drm_gem_handle_delete;	} 	/*	 * 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->vm, &paddr);	if (ret) {		drm_err(dev, "failed to get buffer obj iova: %d\n", ret);		goto err_drm_client_buffer_delete;	} 	DBG("fbi=%p, dev=%p", fbi, dev); 	helper->funcs = &msm_fbdev_helper_funcs;	helper->buffer = buffer;	helper->fb = buffer->fb; 	fbi->fbops = &msm_fb_ops; 	drm_fb_helper_fill_info(fbi, helper, sizes); 	fbi->screen_buffer = msm_gem_get_vaddr(bo);	if (IS_ERR(fbi->screen_buffer)) {		ret = PTR_ERR(fbi->screen_buffer);		goto err_msm_gem_unpin;	}	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", buffer->fb->width, buffer->fb->height); 	/* The handle is only needed for creating the framebuffer. */	drm_gem_handle_delete(file, handle); 	/* The framebuffer still holds a reference on the GEM object. */	drm_gem_object_put(bo); 	return 0; err_msm_gem_unpin:	msm_gem_unpin_iova(bo, priv->kms->vm);	msm_gem_vma_put(bo);err_drm_client_buffer_delete:	drm_client_buffer_delete(buffer);err_drm_gem_handle_delete:	drm_gem_handle_delete(file, handle);err_drm_gem_object_put:	drm_gem_object_put(bo);	return ret;}