linux_dsm_epyc7002/drivers/gpu/drm/tegra/fb.c
Thierry Reding dee8268f8f drm/tegra: Move driver to DRM tree
In order to make subsystem-wide changes easier, move the Tegra DRM
driver back into the DRM tree.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:40 +01:00

373 lines
8.7 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 "drm.h"
#include "gem.h"
static inline struct tegra_fb *to_tegra_fb(struct drm_framebuffer *fb)
{
return container_of(fb, struct tegra_fb, base);
}
static inline struct tegra_fbdev *to_tegra_fbdev(struct drm_fb_helper *helper)
{
return container_of(helper, struct tegra_fbdev, base);
}
struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
unsigned int index)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
if (index >= drm_format_num_planes(framebuffer->pixel_format))
return NULL;
return fb->planes[index];
}
static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
unsigned int i;
for (i = 0; i < fb->num_planes; i++) {
struct tegra_bo *bo = fb->planes[i];
if (bo)
drm_gem_object_unreference_unlocked(&bo->gem);
}
drm_framebuffer_cleanup(framebuffer);
kfree(fb->planes);
kfree(fb);
}
static int tegra_fb_create_handle(struct drm_framebuffer *framebuffer,
struct drm_file *file, unsigned int *handle)
{
struct tegra_fb *fb = to_tegra_fb(framebuffer);
return drm_gem_handle_create(file, &fb->planes[0]->gem, handle);
}
static struct drm_framebuffer_funcs tegra_fb_funcs = {
.destroy = tegra_fb_destroy,
.create_handle = tegra_fb_create_handle,
};
static struct tegra_fb *tegra_fb_alloc(struct drm_device *drm,
struct drm_mode_fb_cmd2 *mode_cmd,
struct tegra_bo **planes,
unsigned int num_planes)
{
struct tegra_fb *fb;
unsigned int i;
int err;
fb = kzalloc(sizeof(*fb), GFP_KERNEL);
if (!fb)
return ERR_PTR(-ENOMEM);
fb->planes = kzalloc(num_planes * sizeof(*planes), GFP_KERNEL);
if (!fb->planes)
return ERR_PTR(-ENOMEM);
fb->num_planes = num_planes;
drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
for (i = 0; i < fb->num_planes; i++)
fb->planes[i] = planes[i];
err = drm_framebuffer_init(drm, &fb->base, &tegra_fb_funcs);
if (err < 0) {
dev_err(drm->dev, "failed to initialize framebuffer: %d\n",
err);
kfree(fb->planes);
kfree(fb);
return ERR_PTR(err);
}
return fb;
}
static struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
struct drm_file *file,
struct drm_mode_fb_cmd2 *cmd)
{
unsigned int hsub, vsub, i;
struct tegra_bo *planes[4];
struct drm_gem_object *gem;
struct tegra_fb *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(drm, 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->base;
unreference:
while (i--)
drm_gem_object_unreference_unlocked(&planes[i]->gem);
return ERR_PTR(err);
}
static struct fb_ops tegra_fb_ops = {
.owner = THIS_MODULE,
.fb_fillrect = sys_fillrect,
.fb_copyarea = sys_copyarea,
.fb_imageblit = sys_imageblit,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_blank = drm_fb_helper_blank,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_setcmap = drm_fb_helper_setcmap,
};
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 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] = sizes->surface_width * bytes_per_pixel;
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);
if (IS_ERR(bo))
return PTR_ERR(bo);
info = framebuffer_alloc(0, drm->dev);
if (!info) {
dev_err(drm->dev, "failed to allocate framebuffer info\n");
tegra_bo_free_object(&bo->gem);
return -ENOMEM;
}
fbdev->fb = tegra_fb_alloc(drm, &cmd, &bo, 1);
if (IS_ERR(fbdev->fb)) {
dev_err(drm->dev, "failed to allocate DRM framebuffer\n");
err = PTR_ERR(fbdev->fb);
goto release;
}
fb = &fbdev->fb->base;
helper->fb = fb;
helper->fbdev = info;
info->par = helper;
info->flags = FBINFO_FLAG_DEFAULT;
info->fbops = &tegra_fb_ops;
err = fb_alloc_cmap(&info->cmap, 256, 0);
if (err < 0) {
dev_err(drm->dev, "failed to allocate color map: %d\n", err);
goto destroy;
}
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->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];
drm->mode_config.fb_base = (resource_size_t)bo->paddr;
info->screen_base = 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_unregister_private(fb);
tegra_fb_destroy(fb);
release:
framebuffer_release(info);
return err;
}
static 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,
unsigned int preferred_bpp,
unsigned int num_crtc,
unsigned int max_connectors)
{
struct drm_fb_helper *helper;
struct tegra_fbdev *fbdev;
int err;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev) {
dev_err(drm->dev, "failed to allocate DRM fbdev\n");
return ERR_PTR(-ENOMEM);
}
fbdev->base.funcs = &tegra_fb_helper_funcs;
helper = &fbdev->base;
err = drm_fb_helper_init(drm, &fbdev->base, num_crtc, max_connectors);
if (err < 0) {
dev_err(drm->dev, "failed to initialize DRM FB helper\n");
goto free;
}
err = drm_fb_helper_single_add_all_connectors(&fbdev->base);
if (err < 0) {
dev_err(drm->dev, "failed to add connectors\n");
goto fini;
}
drm_helper_disable_unused_functions(drm);
err = drm_fb_helper_initial_config(&fbdev->base, preferred_bpp);
if (err < 0) {
dev_err(drm->dev, "failed to set initial configuration\n");
goto fini;
}
return fbdev;
fini:
drm_fb_helper_fini(&fbdev->base);
free:
kfree(fbdev);
return ERR_PTR(err);
}
static void tegra_fbdev_free(struct tegra_fbdev *fbdev)
{
struct fb_info *info = fbdev->base.fbdev;
if (info) {
int err;
err = unregister_framebuffer(info);
if (err < 0)
DRM_DEBUG_KMS("failed to unregister framebuffer\n");
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
if (fbdev->fb) {
drm_framebuffer_unregister_private(&fbdev->fb->base);
tegra_fb_destroy(&fbdev->fb->base);
}
drm_fb_helper_fini(&fbdev->base);
kfree(fbdev);
}
static void tegra_fb_output_poll_changed(struct drm_device *drm)
{
struct tegra_drm *tegra = drm->dev_private;
if (tegra->fbdev)
drm_fb_helper_hotplug_event(&tegra->fbdev->base);
}
static const struct drm_mode_config_funcs tegra_drm_mode_funcs = {
.fb_create = tegra_fb_create,
.output_poll_changed = tegra_fb_output_poll_changed,
};
int tegra_drm_fb_init(struct drm_device *drm)
{
struct tegra_drm *tegra = drm->dev_private;
struct tegra_fbdev *fbdev;
drm->mode_config.min_width = 0;
drm->mode_config.min_height = 0;
drm->mode_config.max_width = 4096;
drm->mode_config.max_height = 4096;
drm->mode_config.funcs = &tegra_drm_mode_funcs;
fbdev = tegra_fbdev_create(drm, 32, drm->mode_config.num_crtc,
drm->mode_config.num_connector);
if (IS_ERR(fbdev))
return PTR_ERR(fbdev);
tegra->fbdev = fbdev;
return 0;
}
void tegra_drm_fb_exit(struct drm_device *drm)
{
struct tegra_drm *tegra = drm->dev_private;
tegra_fbdev_free(tegra->fbdev);
}
void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev)
{
if (fbdev) {
drm_modeset_lock_all(fbdev->base.dev);
drm_fb_helper_restore_fbdev_mode(&fbdev->base);
drm_modeset_unlock_all(fbdev->base.dev);
}
}