Commit 1ac45068 authored by Thomas Zimmermann's avatar Thomas Zimmermann Committed by Thierry Reding

drm/tegra: Hide fbdev support behind config option

Only build tegra's fbdev emulation if CONFIG_DRM_FBDEV_EMULATION
has been enabled. As part of this change, move the code into its
own source file. No functional changes.
Signed-off-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 43443460
......@@ -29,4 +29,6 @@ tegra-drm-y := \
tegra-drm-y += trace.o
tegra-drm-$(CONFIG_DRM_FBDEV_EMULATION) += fbdev.o
obj-$(CONFIG_DRM_TEGRA) += tegra-drm.o
......@@ -185,13 +185,33 @@ struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer);
int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
struct tegra_bo_tiling *tiling);
struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct tegra_bo **planes,
unsigned int num_planes);
struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *cmd);
#ifdef CONFIG_DRM_FBDEV_EMULATION
int tegra_drm_fb_prepare(struct drm_device *drm);
void tegra_drm_fb_free(struct drm_device *drm);
int tegra_drm_fb_init(struct drm_device *drm);
void tegra_drm_fb_exit(struct drm_device *drm);
#else
static inline int tegra_drm_fb_prepare(struct drm_device *drm)
{
return 0;
}
static inline void tegra_drm_fb_free(struct drm_device *drm)
{ }
static inline int tegra_drm_fb_init(struct drm_device *drm)
{
return 0;
}
static inline void tegra_drm_fb_exit(struct drm_device *drm)
{ }
#endif
extern struct platform_driver tegra_display_hub_driver;
extern struct platform_driver tegra_dc_driver;
......
......@@ -8,7 +8,6 @@
*/
#include <linux/console.h>
#include <linux/vmalloc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
......@@ -102,7 +101,7 @@ static const struct drm_framebuffer_funcs tegra_fb_funcs = {
.create_handle = drm_gem_fb_create_handle,
};
static struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm,
struct drm_framebuffer *tegra_fb_alloc(struct drm_device *drm,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct tegra_bo **planes,
unsigned int num_planes)
......@@ -180,223 +179,3 @@ struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
return ERR_PTR(err);
}
#ifdef CONFIG_DRM_FBDEV_EMULATION
static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = info->par;
struct tegra_bo *bo;
int err;
bo = tegra_fb_get_plane(helper->fb, 0);
err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma);
if (err < 0)
return err;
return __tegra_gem_mmap(&bo->gem, vma);
}
static const struct fb_ops tegra_fb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.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 = tegra_fb_mmap,
};
static int tegra_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct tegra_drm *tegra = helper->dev->dev_private;
struct drm_device *drm = helper->dev;
struct drm_mode_fb_cmd2 cmd = { 0 };
unsigned int bytes_per_pixel;
struct drm_framebuffer *fb;
unsigned long offset;
struct fb_info *info;
struct tegra_bo *bo;
size_t size;
int err;
bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
cmd.width = sizes->surface_width;
cmd.height = sizes->surface_height;
cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
tegra->pitch_align);
cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = cmd.pitches[0] * cmd.height;
bo = tegra_bo_create(drm, size, 0);
if (IS_ERR(bo))
return PTR_ERR(bo);
info = drm_fb_helper_alloc_info(helper);
if (IS_ERR(info)) {
dev_err(drm->dev, "failed to allocate framebuffer info\n");
drm_gem_object_put(&bo->gem);
return PTR_ERR(info);
}
fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
if (IS_ERR(fb)) {
err = PTR_ERR(fb);
dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
err);
drm_gem_object_put(&bo->gem);
return PTR_ERR(fb);
}
helper->fb = fb;
helper->info = info;
info->fbops = &tegra_fb_ops;
drm_fb_helper_fill_info(info, helper, sizes);
offset = info->var.xoffset * bytes_per_pixel +
info->var.yoffset * fb->pitches[0];
if (bo->pages) {
bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));
if (!bo->vaddr) {
dev_err(drm->dev, "failed to vmap() framebuffer\n");
err = -ENOMEM;
goto destroy;
}
}
info->screen_base = (void __iomem *)bo->vaddr + offset;
info->screen_size = size;
info->fix.smem_start = (unsigned long)(bo->iova + offset);
info->fix.smem_len = size;
return 0;
destroy:
drm_framebuffer_remove(fb);
return err;
}
static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
.fb_probe = tegra_fbdev_probe,
};
static struct drm_fb_helper *tegra_fbdev_create(struct drm_device *drm)
{
struct drm_fb_helper *helper;
helper = kzalloc(sizeof(*helper), GFP_KERNEL);
if (!helper) {
dev_err(drm->dev, "failed to allocate DRM fbdev\n");
return ERR_PTR(-ENOMEM);
}
drm_fb_helper_prepare(drm, helper, 32, &tegra_fb_helper_funcs);
return helper;
}
static void tegra_fbdev_free(struct drm_fb_helper *helper)
{
drm_fb_helper_unprepare(helper);
kfree(helper);
}
static int tegra_fbdev_init(struct drm_fb_helper *helper,
unsigned int num_crtc,
unsigned int max_connectors)
{
struct drm_device *drm = helper->dev;
int err;
err = drm_fb_helper_init(drm, helper);
if (err < 0) {
dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
err);
return err;
}
err = drm_fb_helper_initial_config(helper);
if (err < 0) {
dev_err(drm->dev, "failed to set initial configuration: %d\n",
err);
goto fini;
}
return 0;
fini:
drm_fb_helper_fini(helper);
return err;
}
static void tegra_fbdev_exit(struct drm_fb_helper *helper)
{
struct drm_framebuffer *fb = helper->fb;
drm_fb_helper_unregister_info(helper);
if (fb) {
struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
/* Undo the special mapping we made in fbdev probe. */
if (bo && bo->pages) {
vunmap(bo->vaddr);
bo->vaddr = NULL;
}
drm_framebuffer_remove(fb);
}
drm_fb_helper_fini(helper);
tegra_fbdev_free(helper);
}
#endif
int tegra_drm_fb_prepare(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
drm->fb_helper = tegra_fbdev_create(drm);
if (IS_ERR(drm->fb_helper))
return PTR_ERR(drm->fb_helper);
#endif
return 0;
}
void tegra_drm_fb_free(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
tegra_fbdev_free(drm->fb_helper);
#endif
}
int tegra_drm_fb_init(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
int err;
err = tegra_fbdev_init(drm->fb_helper, drm->mode_config.num_crtc,
drm->mode_config.num_connector);
if (err < 0)
return err;
#endif
return 0;
}
void tegra_drm_fb_exit(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
tegra_fbdev_exit(drm->fb_helper);
#endif
}
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012-2013 Avionic Design GmbH
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
*
* Based on the KMS/FB DMA helpers
* Copyright (C) 2012 Analog Devices Inc.
*/
#include <linux/console.h>
#include <linux/vmalloc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>
#include "drm.h"
#include "gem.h"
static int tegra_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = info->par;
struct tegra_bo *bo;
int err;
bo = tegra_fb_get_plane(helper->fb, 0);
err = drm_gem_mmap_obj(&bo->gem, bo->gem.size, vma);
if (err < 0)
return err;
return __tegra_gem_mmap(&bo->gem, vma);
}
static const struct fb_ops tegra_fb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.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 = tegra_fb_mmap,
};
static int tegra_fbdev_probe(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct tegra_drm *tegra = helper->dev->dev_private;
struct drm_device *drm = helper->dev;
struct drm_mode_fb_cmd2 cmd = { 0 };
unsigned int bytes_per_pixel;
struct drm_framebuffer *fb;
unsigned long offset;
struct fb_info *info;
struct tegra_bo *bo;
size_t size;
int err;
bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
cmd.width = sizes->surface_width;
cmd.height = sizes->surface_height;
cmd.pitches[0] = round_up(sizes->surface_width * bytes_per_pixel,
tegra->pitch_align);
cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = cmd.pitches[0] * cmd.height;
bo = tegra_bo_create(drm, size, 0);
if (IS_ERR(bo))
return PTR_ERR(bo);
info = drm_fb_helper_alloc_info(helper);
if (IS_ERR(info)) {
dev_err(drm->dev, "failed to allocate framebuffer info\n");
drm_gem_object_put(&bo->gem);
return PTR_ERR(info);
}
fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
if (IS_ERR(fb)) {
err = PTR_ERR(fb);
dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
err);
drm_gem_object_put(&bo->gem);
return PTR_ERR(fb);
}
helper->fb = fb;
helper->info = info;
info->fbops = &tegra_fb_ops;
drm_fb_helper_fill_info(info, helper, sizes);
offset = info->var.xoffset * bytes_per_pixel +
info->var.yoffset * fb->pitches[0];
if (bo->pages) {
bo->vaddr = vmap(bo->pages, bo->num_pages, VM_MAP,
pgprot_writecombine(PAGE_KERNEL));
if (!bo->vaddr) {
dev_err(drm->dev, "failed to vmap() framebuffer\n");
err = -ENOMEM;
goto destroy;
}
}
info->screen_base = (void __iomem *)bo->vaddr + offset;
info->screen_size = size;
info->fix.smem_start = (unsigned long)(bo->iova + offset);
info->fix.smem_len = size;
return 0;
destroy:
drm_framebuffer_remove(fb);
return err;
}
static const struct drm_fb_helper_funcs tegra_fb_helper_funcs = {
.fb_probe = tegra_fbdev_probe,
};
static struct drm_fb_helper *tegra_fbdev_create(struct drm_device *drm)
{
struct drm_fb_helper *helper;
helper = kzalloc(sizeof(*helper), GFP_KERNEL);
if (!helper)
return ERR_PTR(-ENOMEM);
drm_fb_helper_prepare(drm, helper, 32, &tegra_fb_helper_funcs);
return helper;
}
static void tegra_fbdev_free(struct drm_fb_helper *helper)
{
drm_fb_helper_unprepare(helper);
kfree(helper);
}
static int tegra_fbdev_init(struct drm_fb_helper *helper,
unsigned int num_crtc,
unsigned int max_connectors)
{
struct drm_device *drm = helper->dev;
int err;
err = drm_fb_helper_init(drm, helper);
if (err < 0) {
dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
err);
return err;
}
err = drm_fb_helper_initial_config(helper);
if (err < 0) {
dev_err(drm->dev, "failed to set initial configuration: %d\n",
err);
goto fini;
}
return 0;
fini:
drm_fb_helper_fini(helper);
return err;
}
static void tegra_fbdev_exit(struct drm_fb_helper *helper)
{
struct drm_framebuffer *fb = helper->fb;
drm_fb_helper_unregister_info(helper);
if (fb) {
struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
/* Undo the special mapping we made in fbdev probe. */
if (bo && bo->pages) {
vunmap(bo->vaddr);
bo->vaddr = NULL;
}
drm_framebuffer_remove(fb);
}
drm_fb_helper_fini(helper);
tegra_fbdev_free(helper);
}
int tegra_drm_fb_prepare(struct drm_device *drm)
{
drm->fb_helper = tegra_fbdev_create(drm);
if (IS_ERR(drm->fb_helper))
return PTR_ERR(drm->fb_helper);
return 0;
}
void tegra_drm_fb_free(struct drm_device *drm)
{
tegra_fbdev_free(drm->fb_helper);
}
int tegra_drm_fb_init(struct drm_device *drm)
{
int err;
err = tegra_fbdev_init(drm->fb_helper, drm->mode_config.num_crtc,
drm->mode_config.num_connector);
if (err < 0)
return err;
return 0;
}
void tegra_drm_fb_exit(struct drm_device *drm)
{
tegra_fbdev_exit(drm->fb_helper);
}
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