linux/drivers/gpu/drm/ast/ast_fb.c

373 lines
9.2 KiB
C
Raw Normal View History

/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
/*
* Authors: Dave Airlie <airlied@redhat.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/sysrq.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
#include "ast_drv.h"
static void ast_dirty_update(struct ast_fbdev *afbdev,
int x, int y, int width, int height)
{
int i;
struct drm_gem_object *obj;
struct ast_bo *bo;
int src_offset, dst_offset;
int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
int ret = -EBUSY;
bool unmap = false;
bool store_for_later = false;
int x2, y2;
unsigned long flags;
obj = afbdev->afb.obj;
bo = gem_to_ast_bo(obj);
/*
* try and reserve the BO, if we fail with busy
* then the BO is being moved and we should
* store up the damage until later.
*/
if (drm_can_sleep())
ret = ast_bo_reserve(bo, true);
if (ret) {
if (ret != -EBUSY)
return;
store_for_later = true;
}
x2 = x + width - 1;
y2 = y + height - 1;
spin_lock_irqsave(&afbdev->dirty_lock, flags);
if (afbdev->y1 < y)
y = afbdev->y1;
if (afbdev->y2 > y2)
y2 = afbdev->y2;
if (afbdev->x1 < x)
x = afbdev->x1;
if (afbdev->x2 > x2)
x2 = afbdev->x2;
if (store_for_later) {
afbdev->x1 = x;
afbdev->x2 = x2;
afbdev->y1 = y;
afbdev->y2 = y2;
spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
return;
}
afbdev->x1 = afbdev->y1 = INT_MAX;
afbdev->x2 = afbdev->y2 = 0;
spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
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");
ast_bo_unreserve(bo);
return;
}
unmap = true;
}
for (i = y; i <= y2; i++) {
/* assume equal stride for now */
src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
}
if (unmap)
ttm_bo_kunmap(&bo->kmap);
ast_bo_unreserve(bo);
}
static void ast_fillrect(struct fb_info *info,
const struct fb_fillrect *rect)
{
struct ast_fbdev *afbdev = info->par;
sys_fillrect(info, rect);
ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
rect->height);
}
static void ast_copyarea(struct fb_info *info,
const struct fb_copyarea *area)
{
struct ast_fbdev *afbdev = info->par;
sys_copyarea(info, area);
ast_dirty_update(afbdev, area->dx, area->dy, area->width,
area->height);
}
static void ast_imageblit(struct fb_info *info,
const struct fb_image *image)
{
struct ast_fbdev *afbdev = info->par;
sys_imageblit(info, image);
ast_dirty_update(afbdev, image->dx, image->dy, image->width,
image->height);
}
static struct fb_ops astfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = ast_fillrect,
.fb_copyarea = ast_copyarea,
.fb_imageblit = ast_imageblit,
.fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
.fb_debug_enter = drm_fb_helper_debug_enter,
.fb_debug_leave = drm_fb_helper_debug_leave,
};
static int astfb_create_object(struct ast_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 = ast_gem_create(dev, size, true, &gobj);
if (ret)
return ret;
*gobj_p = gobj;
return ret;
}
static int astfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct ast_fbdev *afbdev =
container_of(helper, struct ast_fbdev, helper);
struct drm_device *dev = afbdev->helper.dev;
struct drm_mode_fb_cmd2 mode_cmd;
struct drm_framebuffer *fb;
struct fb_info *info;
int size, ret;
struct device *device = &dev->pdev->dev;
void *sysram;
struct drm_gem_object *gobj = NULL;
struct ast_bo *bo = NULL;
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 = astfb_create_object(afbdev, &mode_cmd, &gobj);
if (ret) {
DRM_ERROR("failed to create fbcon backing object %d\n", ret);
return ret;
}
bo = gem_to_ast_bo(gobj);
sysram = vmalloc(size);
if (!sysram)
return -ENOMEM;
info = framebuffer_alloc(0, device);
if (!info) {
ret = -ENOMEM;
goto out;
}
info->par = afbdev;
ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
if (ret)
goto out;
afbdev->sysram = sysram;
afbdev->size = size;
fb = &afbdev->afb.base;
afbdev->helper.fb = fb;
afbdev->helper.fbdev = info;
strcpy(info->fix.id, "astdrmfb");
info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &astfb_ops;
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
ret = -ENOMEM;
goto out;
}
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out;
}
info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &afbdev->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 void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)
{
struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
ast_crtc->lut_r[regno] = red >> 8;
ast_crtc->lut_g[regno] = green >> 8;
ast_crtc->lut_b[regno] = blue >> 8;
}
static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
*red = ast_crtc->lut_r[regno] << 8;
*green = ast_crtc->lut_g[regno] << 8;
*blue = ast_crtc->lut_b[regno] << 8;
}
static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
.gamma_set = ast_fb_gamma_set,
.gamma_get = ast_fb_gamma_get,
.fb_probe = astfb_create,
};
static void ast_fbdev_destroy(struct drm_device *dev,
struct ast_fbdev *afbdev)
{
struct fb_info *info;
struct ast_framebuffer *afb = &afbdev->afb;
if (afbdev->helper.fbdev) {
info = afbdev->helper.fbdev;
unregister_framebuffer(info);
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
if (afb->obj) {
drm_gem_object_unreference_unlocked(afb->obj);
afb->obj = NULL;
}
drm_fb_helper_fini(&afbdev->helper);
vfree(afbdev->sysram);
drm: revamp framebuffer cleanup interfaces We have two classes of framebuffer - Created by the driver (atm only for fbdev), and the driver holds onto the last reference count until destruction. - Created by userspace and associated with a given fd. These framebuffers will be reaped when their assoiciated fb is closed. Now these two cases are set up differently, the framebuffers are on different lists and hence destruction needs to clean up different things. Also, for userspace framebuffers we remove them from any current usage, whereas for internal framebuffers it is assumed that the driver has done this already. Long story short, we need two different ways to cleanup such drivers. Three functions are involved in total: - drm_framebuffer_remove: Convenience function which removes the fb from all active usage and then drops the passed-in reference. - drm_framebuffer_unregister_private: Will remove driver-private framebuffers from relevant lists and drop the corresponding references. Should be called for driver-private framebuffers before dropping the last reference (or like for a lot of the drivers where the fbdev is embedded someplace else, before doing the cleanup manually). - drm_framebuffer_cleanup: Final cleanup for both classes of fbs, should be called by the driver's ->destroy callback once the last reference is gone. This patch just rolls out the new interfaces and updates all drivers (by adding calls to drm_framebuffer_unregister_private at all the right places)- no functional changes yet. Follow-on patches will move drm core code around and update the lifetime management for framebuffers, so that we are no longer required to keep framebuffers alive by locking mode_config.mutex. I've also updated the kerneldoc already. vmwgfx seems to again be a bit special, at least I haven't figured out how the fbdev support in that driver works. It smells like it's external though. v2: The i915 driver creates another private framebuffer in the load-detect code. Adjust its cleanup code, too. Reviewed-by: Rob Clark <rob@ti.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-12-11 03:42:17 +08:00
drm_framebuffer_unregister_private(&afb->base);
drm_framebuffer_cleanup(&afb->base);
}
int ast_fbdev_init(struct drm_device *dev)
{
struct ast_private *ast = dev->dev_private;
struct ast_fbdev *afbdev;
int ret;
afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
if (!afbdev)
return -ENOMEM;
ast->fbdev = afbdev;
spin_lock_init(&afbdev->dirty_lock);
drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
ret = drm_fb_helper_init(dev, &afbdev->helper,
1, 1);
if (ret) {
kfree(afbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&afbdev->helper);
/* disable all the possible outputs/crtcs before entering KMS mode */
drm_helper_disable_unused_functions(dev);
drm_fb_helper_initial_config(&afbdev->helper, 32);
return 0;
}
void ast_fbdev_fini(struct drm_device *dev)
{
struct ast_private *ast = dev->dev_private;
if (!ast->fbdev)
return;
ast_fbdev_destroy(dev, ast->fbdev);
kfree(ast->fbdev);
ast->fbdev = NULL;
}
void ast_fbdev_set_suspend(struct drm_device *dev, int state)
{
struct ast_private *ast = dev->dev_private;
if (!ast->fbdev)
return;
fb_set_suspend(ast->fbdev->helper.fbdev, state);
}