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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 05:04:00 +08:00
linux-next/drivers/gpu/drm/tegra/fb.c
Daniel Vetter f12d0b91af drm/<drivers>: Don't set FBINFO_(FLAG_)DEFAULT
Both macros evaluate to 0. At the same time flag is already set to
zero since the struct is kzalloc'd in framebuffer_alloc().
As called by drm_fb_helper_alloc_fbi() in the DRM drivers.

v2: Rebase and improve commit message per Emil's suggestion.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: nouveau@lists.freedesktop.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-tegra@vger.kernel.org
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190124165831.16427-27-daniel.vetter@ffwll.ch
2019-01-29 10:56:42 +01:00

415 lines
9.4 KiB
C

/*
* Copyright (C) 2012-2013 Avionic Design GmbH
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
*
* Based on the KMS/FB CMA helpers
* Copyright (C) 2012 Analog Device Inc.
*
* 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.
*/
#include <linux/console.h>
#include "drm.h"
#include "gem.h"
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modeset_helper.h>
#ifdef CONFIG_DRM_FBDEV_EMULATION
static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
{
return container_of(helper, struct tegra_fbdev, base);
}
#endif
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index)
{
return to_tegra_bo(drm_gem_fb_get_obj(framebuffer, index));
}
bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer)
{
struct tegra_bo *bo = tegra_fb_get_plane(framebuffer, 0);
if (bo->flags & TEGRA_BO_BOTTOM_UP)
return true;
return false;
}
int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
struct tegra_bo_tiling *tiling)
{
uint64_t modifier = framebuffer->modifier;
switch (modifier) {
case DRM_FORMAT_MOD_LINEAR:
tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
tiling->value = 0;
break;
case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
tiling->mode = TEGRA_BO_TILING_MODE_TILED;
tiling->value = 0;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 0;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 1;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 2;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 3;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 4;
break;
case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
tiling->value = 5;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct drm_framebuffer_funcs tegra_fb_funcs = {
.destroy = drm_gem_fb_destroy,
.create_handle = drm_gem_fb_create_handle,
};
static 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 *fb;
unsigned int i;
int err;
fb = kzalloc(sizeof(*fb), GFP_KERNEL);
if (!fb)
return ERR_PTR(-ENOMEM);
drm_helper_mode_fill_fb_struct(drm, fb, mode_cmd);
for (i = 0; i < fb->format->num_planes; i++)
fb->obj[i] = &planes[i]->gem;
err = drm_framebuffer_init(drm, fb, &tegra_fb_funcs);
if (err < 0) {
dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
err);
kfree(fb);
return ERR_PTR(err);
}
return fb;
}
struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
struct drm_file *file,
const struct drm_mode_fb_cmd2 *cmd)
{
unsigned int hsub, vsub, i;
struct tegra_bo *planes[4];
struct drm_gem_object *gem;
struct drm_framebuffer *fb;
int err;
hsub = drm_format_horz_chroma_subsampling(cmd->pixel_format);
vsub = drm_format_vert_chroma_subsampling(cmd->pixel_format);
for (i = 0; i < drm_format_num_planes(cmd->pixel_format); i++) {
unsigned int width = cmd->width / (i ? hsub : 1);
unsigned int height = cmd->height / (i ? vsub : 1);
unsigned int size, bpp;
gem = drm_gem_object_lookup(file, cmd->handles[i]);
if (!gem) {
err = -ENXIO;
goto unreference;
}
bpp = drm_format_plane_cpp(cmd->pixel_format, i);
size = (height - 1) * cmd->pitches[i] +
width * bpp + cmd->offsets[i];
if (gem->size < size) {
err = -EINVAL;
goto unreference;
}
planes[i] = to_tegra_bo(gem);
}
fb = tegra_fb_alloc(drm, cmd, planes, i);
if (IS_ERR(fb)) {
err = PTR_ERR(fb);
goto unreference;
}
return fb;
unreference:
while (i--)
drm_gem_object_put_unlocked(&planes[i]->gem);
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 struct fb_ops tegra_fb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.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_fbdev *fbdev = to_tegra_fbdev(helper);
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_fbi(helper);
if (IS_ERR(info)) {
dev_err(drm->dev, "failed to allocate framebuffer info\n");
drm_gem_object_put_unlocked(&bo->gem);
return PTR_ERR(info);
}
fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
if (IS_ERR(fbdev->fb)) {
err = PTR_ERR(fbdev->fb);
dev_err(drm->dev, "failed to allocate DRM framebuffer: %d\n",
err);
drm_gem_object_put_unlocked(&bo->gem);
return PTR_ERR(fbdev->fb);
}
fb = fbdev->fb;
helper->fb = fb;
helper->fbdev = info;
info->par = helper;
info->fbops = &tegra_fb_ops;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
drm_fb_helper_fill_var(info, helper, fb->width, fb->height);
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;
}
}
drm->mode_config.fb_base = (resource_size_t)bo->paddr;
info->screen_base = (void __iomem *)bo->vaddr + offset;
info->screen_size = size;
info->fix.smem_start = (unsigned long)(bo->paddr + 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 tegra_fbdev *tegra_fbdev_create(struct drm_device *drm)
{
struct tegra_fbdev *fbdev;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev) {
dev_err(drm->dev, "failed to allocate DRM fbdev\n");
return ERR_PTR(-ENOMEM);
}
drm_fb_helper_prepare(drm, &fbdev->base, &tegra_fb_helper_funcs);
return fbdev;
}
static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
{
kfree(fbdev);
}
static int tegra_fbdev_init(struct tegra_fbdev *fbdev,
unsigned int preferred_bpp,
unsigned int num_crtc,
unsigned int max_connectors)
{
struct drm_device *drm = fbdev->base.dev;
int err;
err = drm_fb_helper_init(drm, &fbdev->base, max_connectors);
if (err < 0) {
dev_err(drm->dev, "failed to initialize DRM FB helper: %d\n",
err);
return err;
}
err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
if (err < 0) {
dev_err(drm->dev, "failed to add connectors: %d\n", err);
goto fini;
}
err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
if (err < 0) {
dev_err(drm->dev, "failed to set initial configuration: %d\n",
err);
goto fini;
}
return 0;
fini:
drm_fb_helper_fini(&fbdev->base);
return err;
}
static void tegra_fbdev_exit(struct tegra_fbdev *fbdev)
{
drm_fb_helper_unregister_fbi(&fbdev->base);
if (fbdev->fb) {
struct tegra_bo *bo = tegra_fb_get_plane(fbdev->fb, 0);
/* Undo the special mapping we made in fbdev probe. */
if (bo && bo->pages) {
vunmap(bo->vaddr);
bo->vaddr = NULL;
}
drm_framebuffer_remove(fbdev->fb);
}
drm_fb_helper_fini(&fbdev->base);
tegra_fbdev_free(fbdev);
}
#endif
int tegra_drm_fb_prepare(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
struct tegra_drm *tegra = drm->dev_private;
tegra->fbdev = tegra_fbdev_create(drm);
if (IS_ERR(tegra->fbdev))
return PTR_ERR(tegra->fbdev);
#endif
return 0;
}
void tegra_drm_fb_free(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
struct tegra_drm *tegra = drm->dev_private;
tegra_fbdev_free(tegra->fbdev);
#endif
}
int tegra_drm_fb_init(struct drm_device *drm)
{
#ifdef CONFIG_DRM_FBDEV_EMULATION
struct tegra_drm *tegra = drm->dev_private;
int err;
err = tegra_fbdev_init(tegra->fbdev, 32, 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
struct tegra_drm *tegra = drm->dev_private;
tegra_fbdev_exit(tegra->fbdev);
#endif
}