linux/drivers/gpu/drm/mgag200/mgag200_fb.c

295 lines
6.7 KiB
C

/*
* Copyright 2010 Matt Turner.
* Copyright 2012 Red Hat
*
* This file is subject to the terms and conditions of the GNU General
* Public License version 2. See the file COPYING in the main
* directory of this archive for more details.
*
* Authors: Matthew Garrett
* Matt Turner
* Dave Airlie
*/
#include <linux/module.h>
#include "drmP.h"
#include "drm.h"
#include "drm_fb_helper.h"
#include <linux/fb.h>
#include "mgag200_drv.h"
static void mga_dirty_update(struct mga_fbdev *mfbdev,
int x, int y, int width, int height)
{
int i;
struct drm_gem_object *obj;
struct mgag200_bo *bo;
int src_offset, dst_offset;
int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
int ret;
bool unmap = false;
obj = mfbdev->mfb.obj;
bo = gem_to_mga_bo(obj);
ret = mgag200_bo_reserve(bo, true);
if (ret) {
DRM_ERROR("failed to reserve fb bo\n");
return;
}
if (!bo->kmap.virtual) {
ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
if (ret) {
DRM_ERROR("failed to kmap fb updates\n");
mgag200_bo_unreserve(bo);
return;
}
unmap = true;
}
for (i = y; i < y + height; i++) {
/* assume equal stride for now */
src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp);
}
if (unmap)
ttm_bo_kunmap(&bo->kmap);
mgag200_bo_unreserve(bo);
}
static void mga_fillrect(struct fb_info *info,
const struct fb_fillrect *rect)
{
struct mga_fbdev *mfbdev = info->par;
sys_fillrect(info, rect);
mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
rect->height);
}
static void mga_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
struct mga_fbdev *mfbdev = info->par;
sys_copyarea(info, area);
mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
area->height);
}
static void mga_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct mga_fbdev *mfbdev = info->par;
sys_imageblit(info, image);
mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
image->height);
}
static struct fb_ops mgag200fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = mga_fillrect,
.fb_copyarea = mga_copyarea,
.fb_imageblit = mga_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
};
static int mgag200fb_create_object(struct mga_fbdev *afbdev,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object **gobj_p)
{
struct drm_device *dev = afbdev->helper.dev;
u32 bpp, depth;
u32 size;
struct drm_gem_object *gobj;
int ret = 0;
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
size = mode_cmd->pitches[0] * mode_cmd->height;
ret = mgag200_gem_create(dev, size, true, &gobj);
if (ret)
return ret;
*gobj_p = gobj;
return ret;
}
static int mgag200fb_create(struct mga_fbdev *mfbdev,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_device *dev = mfbdev->helper.dev;
struct drm_mode_fb_cmd2 mode_cmd;
struct mga_device *mdev = dev->dev_private;
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_gem_object *gobj = NULL;
struct device *device = &dev->pdev->dev;
struct mgag200_bo *bo;
int ret;
void *sysram;
int size;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = mode_cmd.pitches[0] * mode_cmd.height;
ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
if (ret) {
DRM_ERROR("failed to create fbcon backing object %d\n", ret);
return ret;
}
bo = gem_to_mga_bo(gobj);
sysram = vmalloc(size);
if (!sysram)
return -ENOMEM;
info = framebuffer_alloc(0, device);
if (info == NULL)
return -ENOMEM;
info->par = mfbdev;
ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
if (ret)
return ret;
mfbdev->sysram = sysram;
mfbdev->size = size;
fb = &mfbdev->mfb.base;
/* setup helper */
mfbdev->helper.fb = fb;
mfbdev->helper.fbdev = info;
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
ret = -ENOMEM;
goto out;
}
strcpy(info->fix.id, "mgadrmfb");
info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &mgag200fb_ops;
/* setup aperture base/size for vesafb takeover */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out;
}
info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
info->apertures->ranges[0].size = mdev->mc.vram_size;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
sizes->fb_height);
info->screen_base = sysram;
info->screen_size = size;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
DRM_DEBUG_KMS("allocated %dx%d\n",
fb->width, fb->height);
return 0;
out:
return ret;
}
static int mga_fb_find_or_create_single(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size
*sizes)
{
struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
int new_fb = 0;
int ret;
if (!helper->fb) {
ret = mgag200fb_create(mfbdev, sizes);
if (ret)
return ret;
new_fb = 1;
}
return new_fb;
}
static int mga_fbdev_destroy(struct drm_device *dev,
struct mga_fbdev *mfbdev)
{
struct fb_info *info;
struct mga_framebuffer *mfb = &mfbdev->mfb;
if (mfbdev->helper.fbdev) {
info = mfbdev->helper.fbdev;
unregister_framebuffer(info);
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
if (mfb->obj) {
drm_gem_object_unreference_unlocked(mfb->obj);
mfb->obj = NULL;
}
drm_fb_helper_fini(&mfbdev->helper);
vfree(mfbdev->sysram);
drm_framebuffer_cleanup(&mfb->base);
return 0;
}
static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
.gamma_set = mga_crtc_fb_gamma_set,
.gamma_get = mga_crtc_fb_gamma_get,
.fb_probe = mga_fb_find_or_create_single,
};
int mgag200_fbdev_init(struct mga_device *mdev)
{
struct mga_fbdev *mfbdev;
int ret;
mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL);
if (!mfbdev)
return -ENOMEM;
mdev->mfbdev = mfbdev;
mfbdev->helper.funcs = &mga_fb_helper_funcs;
ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
mdev->num_crtc, MGAG200FB_CONN_LIMIT);
if (ret) {
kfree(mfbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
drm_fb_helper_initial_config(&mfbdev->helper, 32);
return 0;
}
void mgag200_fbdev_fini(struct mga_device *mdev)
{
if (!mdev->mfbdev)
return;
mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
kfree(mdev->mfbdev);
mdev->mfbdev = NULL;
}