1 files changed, 46 insertions, 183 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index ce9604ca8041..637927818dfe 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* exynos_drm_fbdev.c
  *
  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
@@ -5,127 +6,94 @@
  *	Inki Dae <inki.dae@samsung.com>
  *	Joonyoung Shim <jy0922.shim@samsung.com>
  *	Seung-Woo Kim <sw0312.kim@samsung.com>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
  */
 
-#include <drm/drmP.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_fb_helper.h>
+#include <linux/fb.h>
+
 #include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_prime.h>
+#include <drm/drm_print.h>
 #include <drm/exynos_drm.h>
 
-#include <linux/console.h>
-
 #include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_fbdev.h"
 
 #define MAX_CONNECTOR		4
-#define PREFERRED_BPP		32
 
-#define to_exynos_fbdev(x)	container_of(x, struct exynos_drm_fbdev,\
-				drm_fb_helper)
-
-struct exynos_drm_fbdev {
-	struct drm_fb_helper	drm_fb_helper;
-	struct exynos_drm_gem	*exynos_gem;
-};
-
-static int exynos_drm_fb_mmap(struct fb_info *info,
-			struct vm_area_struct *vma)
+static int exynos_drm_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
 {
 	struct drm_fb_helper *helper = info->par;
-	struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(helper);
-	struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
-	unsigned long vm_size;
-	int ret;
+	struct drm_gem_object *obj = drm_gem_fb_get_obj(helper->fb, 0);
 
-	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+	return drm_gem_prime_mmap(obj, vma);
+}
 
-	vm_size = vma->vm_end - vma->vm_start;
+static void exynos_drm_fb_destroy(struct fb_info *info)
+{
+	struct drm_fb_helper *fb_helper = info->par;
+	struct drm_framebuffer *fb = fb_helper->fb;
 
-	if (vm_size > exynos_gem->size)
-		return -EINVAL;
+	drm_fb_helper_fini(fb_helper);
 
-	ret = dma_mmap_attrs(to_dma_dev(helper->dev), vma, exynos_gem->cookie,
-			     exynos_gem->dma_addr, exynos_gem->size,
-			     exynos_gem->dma_attrs);
-	if (ret < 0) {
-		DRM_ERROR("failed to mmap.\n");
-		return ret;
-	}
+	drm_framebuffer_remove(fb);
 
-	return 0;
+	drm_client_release(&fb_helper->client);
 }
 
-static struct fb_ops exynos_drm_fb_ops = {
+static const struct fb_ops exynos_drm_fb_ops = {
 	.owner		= THIS_MODULE,
+	__FB_DEFAULT_DMAMEM_OPS_RDWR,
 	DRM_FB_HELPER_DEFAULT_OPS,
+	__FB_DEFAULT_DMAMEM_OPS_DRAW,
 	.fb_mmap        = exynos_drm_fb_mmap,
-	.fb_fillrect	= drm_fb_helper_cfb_fillrect,
-	.fb_copyarea	= drm_fb_helper_cfb_copyarea,
-	.fb_imageblit	= drm_fb_helper_cfb_imageblit,
+	.fb_destroy	= exynos_drm_fb_destroy,
 };
 
 static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
 				   struct drm_fb_helper_surface_size *sizes,
 				   struct exynos_drm_gem *exynos_gem)
 {
-	struct fb_info *fbi;
+	struct fb_info *fbi = helper->info;
 	struct drm_framebuffer *fb = helper->fb;
 	unsigned int size = fb->width * fb->height * fb->format->cpp[0];
-	unsigned int nr_pages;
 	unsigned long offset;
 
-	fbi = drm_fb_helper_alloc_fbi(helper);
-	if (IS_ERR(fbi)) {
-		DRM_ERROR("failed to allocate fb info.\n");
-		return PTR_ERR(fbi);
-	}
-
-	fbi->par = helper;
-	fbi->flags = FBINFO_FLAG_DEFAULT;
 	fbi->fbops = &exynos_drm_fb_ops;
 
-	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);
-
-	nr_pages = exynos_gem->size >> PAGE_SHIFT;
-
-	exynos_gem->kvaddr = (void __iomem *) vmap(exynos_gem->pages, nr_pages,
-				VM_MAP, pgprot_writecombine(PAGE_KERNEL));
-	if (!exynos_gem->kvaddr) {
-		DRM_ERROR("failed to map pages to kernel space.\n");
-		return -EIO;
-	}
+	drm_fb_helper_fill_info(fbi, helper, sizes);
 
 	offset = fbi->var.xoffset * fb->format->cpp[0];
 	offset += fbi->var.yoffset * fb->pitches[0];
 
-	fbi->screen_base = exynos_gem->kvaddr + offset;
+	fbi->flags |= FBINFO_VIRTFB;
+	fbi->screen_buffer = exynos_gem->kvaddr + offset;
 	fbi->screen_size = size;
 	fbi->fix.smem_len = size;
 
 	return 0;
 }
 
-static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
-				    struct drm_fb_helper_surface_size *sizes)
+static const struct drm_fb_helper_funcs exynos_drm_fbdev_helper_funcs = {
+};
+
+int exynos_drm_fbdev_driver_fbdev_probe(struct drm_fb_helper *helper,
+					struct drm_fb_helper_surface_size *sizes)
 {
-	struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
 	struct exynos_drm_gem *exynos_gem;
 	struct drm_device *dev = helper->dev;
 	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 	unsigned long size;
 	int ret;
 
-	DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
-			sizes->surface_width, sizes->surface_height,
-			sizes->surface_bpp);
+	DRM_DEV_DEBUG_KMS(dev->dev,
+			  "surface width(%d), height(%d) and bpp(%d\n",
+			  sizes->surface_width, sizes->surface_height,
+			  sizes->surface_bpp);
 
 	mode_cmd.width = sizes->surface_width;
 	mode_cmd.height = sizes->surface_height;
@@ -135,137 +103,32 @@ static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
 
 	size = mode_cmd.pitches[0] * mode_cmd.height;
 
-	exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_CONTIG, size);
-	/*
-	 * If physically contiguous memory allocation fails and if IOMMU is
-	 * supported then try to get buffer from non physically contiguous
-	 * memory area.
-	 */
-	if (IS_ERR(exynos_gem) && is_drm_iommu_supported(dev)) {
-		dev_warn(dev->dev, "contiguous FB allocation failed, falling back to non-contiguous\n");
-		exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_NONCONTIG,
-						   size);
-	}
-
+	exynos_gem = exynos_drm_gem_create(dev, EXYNOS_BO_WC, size, true);
 	if (IS_ERR(exynos_gem))
 		return PTR_ERR(exynos_gem);
 
-	exynos_fbdev->exynos_gem = exynos_gem;
-
 	helper->fb =
-		exynos_drm_framebuffer_init(dev, &mode_cmd, &exynos_gem, 1);
+		exynos_drm_framebuffer_init(dev,
+					    drm_get_format_info(dev, mode_cmd.pixel_format,
+								mode_cmd.modifier[0]),
+					    &mode_cmd, &exynos_gem, 1);
 	if (IS_ERR(helper->fb)) {
-		DRM_ERROR("failed to create drm framebuffer.\n");
+		DRM_DEV_ERROR(dev->dev, "failed to create drm framebuffer.\n");
 		ret = PTR_ERR(helper->fb);
 		goto err_destroy_gem;
 	}
+	helper->funcs = &exynos_drm_fbdev_helper_funcs;
 
 	ret = exynos_drm_fbdev_update(helper, sizes, exynos_gem);
 	if (ret < 0)
 		goto err_destroy_framebuffer;
 
-	return ret;
+	return 0;
 
 err_destroy_framebuffer:
 	drm_framebuffer_cleanup(helper->fb);
+	helper->fb = NULL;
 err_destroy_gem:
 	exynos_drm_gem_destroy(exynos_gem);
-
-	/*
-	 * if failed, all resources allocated above would be released by
-	 * drm_mode_config_cleanup() when drm_load() had been called prior
-	 * to any specific driver such as fimd or hdmi driver.
-	 */
-
 	return ret;
 }
-
-static const struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
-	.fb_probe =	exynos_drm_fbdev_create,
-};
-
-int exynos_drm_fbdev_init(struct drm_device *dev)
-{
-	struct exynos_drm_fbdev *fbdev;
-	struct exynos_drm_private *private = dev->dev_private;
-	struct drm_fb_helper *helper;
-	int ret;
-
-	if (!dev->mode_config.num_crtc)
-		return 0;
-
-	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
-	if (!fbdev)
-		return -ENOMEM;
-
-	private->fb_helper = helper = &fbdev->drm_fb_helper;
-
-	drm_fb_helper_prepare(dev, helper, &exynos_drm_fb_helper_funcs);
-
-	ret = drm_fb_helper_init(dev, helper, MAX_CONNECTOR);
-	if (ret < 0) {
-		DRM_ERROR("failed to initialize drm fb helper.\n");
-		goto err_init;
-	}
-
-	ret = drm_fb_helper_single_add_all_connectors(helper);
-	if (ret < 0) {
-		DRM_ERROR("failed to register drm_fb_helper_connector.\n");
-		goto err_setup;
-
-	}
-
-	ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
-	if (ret < 0) {
-		DRM_ERROR("failed to set up hw configuration.\n");
-		goto err_setup;
-	}
-
-	return 0;
-
-err_setup:
-	drm_fb_helper_fini(helper);
-
-err_init:
-	private->fb_helper = NULL;
-	kfree(fbdev);
-
-	return ret;
-}
-
-static void exynos_drm_fbdev_destroy(struct drm_device *dev,
-				      struct drm_fb_helper *fb_helper)
-{
-	struct exynos_drm_fbdev *exynos_fbd = to_exynos_fbdev(fb_helper);
-	struct exynos_drm_gem *exynos_gem = exynos_fbd->exynos_gem;
-	struct drm_framebuffer *fb;
-
-	vunmap(exynos_gem->kvaddr);
-
-	/* release drm framebuffer and real buffer */
-	if (fb_helper->fb && fb_helper->fb->funcs) {
-		fb = fb_helper->fb;
-		if (fb)
-			drm_framebuffer_remove(fb);
-	}
-
-	drm_fb_helper_unregister_fbi(fb_helper);
-
-	drm_fb_helper_fini(fb_helper);
-}
-
-void exynos_drm_fbdev_fini(struct drm_device *dev)
-{
-	struct exynos_drm_private *private = dev->dev_private;
-	struct exynos_drm_fbdev *fbdev;
-
-	if (!private || !private->fb_helper)
-		return;
-
-	fbdev = to_exynos_fbdev(private->fb_helper);
-
-	exynos_drm_fbdev_destroy(dev, private->fb_helper);
-	kfree(fbdev);
-	private->fb_helper = NULL;
-}
-