linux/drivers/gpu/drm/i915/intel_fbdev.c
Jesse Barnes 8b4f49e039 drm/i915: split fb allocation and initialization v2
If we use a stolen buffer, our probe callback shouldn't allocate a new
buffer; we should re-use the one from the BIOS instead if possible.

v2: fix locking (Jesse)

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-11-26 19:00:27 +01:00

354 lines
9.4 KiB
C

/*
* Copyright © 2007 David Airlie
*
* 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, sublicense,
* 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 above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* David Airlie
*/
#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 <linux/vga_switcheroo.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
static struct fb_ops intelfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_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 intelfb_alloc(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct drm_device *dev = helper->dev;
struct drm_mode_fb_cmd2 mode_cmd = {};
struct drm_i915_gem_object *obj;
int size, ret;
/* we don't do packed 24bpp */
if (sizes->surface_bpp == 24)
sizes->surface_bpp = 32;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = mode_cmd.pitches[0] * mode_cmd.height;
size = ALIGN(size, PAGE_SIZE);
obj = i915_gem_object_create_stolen(dev, size);
if (obj == NULL)
obj = i915_gem_alloc_object(dev, size);
if (!obj) {
DRM_ERROR("failed to allocate framebuffer\n");
ret = -ENOMEM;
goto out;
}
/* Flush everything out, we'll be doing GTT only from now on */
ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
if (ret) {
DRM_ERROR("failed to pin fb: %d\n", ret);
goto out_unref;
}
ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
if (ret)
goto out_unpin;
return 0;
out_unpin:
i915_gem_object_unpin(obj);
out_unref:
drm_gem_object_unreference(&obj->base);
out:
return ret;
}
static int intelfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct intel_framebuffer *intel_fb = &ifbdev->ifb;
struct drm_device *dev = helper->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_i915_gem_object *obj;
int size, ret;
mutex_lock(&dev->struct_mutex);
if (!intel_fb->obj) {
DRM_ERROR("no BIOS fb, allocating a new one\n");
ret = intelfb_alloc(helper, sizes);
if (ret)
goto out_unlock;
} else {
sizes->fb_width = intel_fb->base.width;
sizes->fb_height = intel_fb->base.height;
}
obj = intel_fb->obj;
size = obj->base.size;
info = framebuffer_alloc(0, &dev->pdev->dev);
if (!info) {
ret = -ENOMEM;
goto out_unpin;
}
info->par = helper;
fb = &ifbdev->ifb.base;
ifbdev->helper.fb = fb;
ifbdev->helper.fbdev = info;
strcpy(info->fix.id, "inteldrmfb");
info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &intelfb_ops;
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
ret = -ENOMEM;
goto out_unpin;
}
/* setup aperture base/size for vesafb takeover */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out_unpin;
}
info->apertures->ranges[0].base = dev->mode_config.fb_base;
info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
info->fix.smem_len = size;
info->screen_base =
ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
size);
if (!info->screen_base) {
ret = -ENOSPC;
goto out_unpin;
}
info->screen_size = size;
/* This driver doesn't need a VT switch to restore the mode on resume */
info->skip_vt_switch = true;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
/* If the object is shmemfs backed, it will have given us zeroed pages.
* If the object is stolen however, it will be full of whatever
* garbage was left in there.
*/
if (ifbdev->ifb.obj->stolen)
memset_io(info->screen_base, 0, info->screen_size);
/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
fb->width, fb->height,
i915_gem_obj_ggtt_offset(obj), obj);
mutex_unlock(&dev->struct_mutex);
vga_switcheroo_client_fb_set(dev->pdev, info);
return 0;
out_unpin:
i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
/** Sets the color ramps on behalf of RandR */
static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
intel_crtc->lut_r[regno] = red >> 8;
intel_crtc->lut_g[regno] = green >> 8;
intel_crtc->lut_b[regno] = blue >> 8;
}
static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
*red = intel_crtc->lut_r[regno] << 8;
*green = intel_crtc->lut_g[regno] << 8;
*blue = intel_crtc->lut_b[regno] << 8;
}
static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
.gamma_set = intel_crtc_fb_gamma_set,
.gamma_get = intel_crtc_fb_gamma_get,
.fb_probe = intelfb_create,
};
static void intel_fbdev_destroy(struct drm_device *dev,
struct intel_fbdev *ifbdev)
{
if (ifbdev->helper.fbdev) {
struct fb_info *info = ifbdev->helper.fbdev;
unregister_framebuffer(info);
iounmap(info->screen_base);
if (info->cmap.len)
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
drm_fb_helper_fini(&ifbdev->helper);
drm_framebuffer_unregister_private(&ifbdev->ifb.base);
intel_framebuffer_fini(&ifbdev->ifb);
}
int intel_fbdev_init(struct drm_device *dev)
{
struct intel_fbdev *ifbdev;
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);
if (!ifbdev)
return -ENOMEM;
dev_priv->fbdev = ifbdev;
ifbdev->helper.funcs = &intel_fb_helper_funcs;
ret = drm_fb_helper_init(dev, &ifbdev->helper,
INTEL_INFO(dev)->num_pipes,
4);
if (ret) {
kfree(ifbdev);
return ret;
}
drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
return 0;
}
void intel_fbdev_initial_config(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
/* Due to peculiar init order wrt to hpd handling this is separate. */
drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);
}
void intel_fbdev_fini(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (!dev_priv->fbdev)
return;
intel_fbdev_destroy(dev, dev_priv->fbdev);
kfree(dev_priv->fbdev);
dev_priv->fbdev = NULL;
}
void intel_fbdev_set_suspend(struct drm_device *dev, int state)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_fbdev *ifbdev = dev_priv->fbdev;
struct fb_info *info;
if (!ifbdev)
return;
info = ifbdev->helper.fbdev;
/* On resume from hibernation: If the object is shmemfs backed, it has
* been restored from swap. If the object is stolen however, it will be
* full of whatever garbage was left in there.
*/
if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen)
memset_io(info->screen_base, 0, info->screen_size);
fb_set_suspend(info, state);
}
MODULE_LICENSE("GPL and additional rights");
void intel_fbdev_output_poll_changed(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
}
void intel_fbdev_restore_mode(struct drm_device *dev)
{
int ret;
struct drm_i915_private *dev_priv = dev->dev_private;
if (INTEL_INFO(dev)->num_pipes == 0)
return;
drm_modeset_lock_all(dev);
ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
if (ret)
DRM_DEBUG("failed to restore crtc mode\n");
drm_modeset_unlock_all(dev);
}