![Daniel Vetter](/assets/img/avatar_default.png)
Trying to do anything with kms drivers when oopsing has become a failing proposition. But since we can end up in the fbdev code simply due to the console unblanking that's done unconditionally just removing our panic handler isn't enough. We need to block all fbdev callbacks when oopsing. There was already one in the blank handler, but it failed silently. That makes it impossible for drivers (like i915) who subclass these functions to figure this out. Instead consistently return -EBUSY so that everyone knows that we really don't want to be bothered right now. This also allows us to remove a pile of FIXMEs from the i915 fbdev code (since due to the failure code they now won't attempt to grab dangerous locks any more). Cc: Dave Airlie <airlied@gmail.com> Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
816 lines
23 KiB
C
816 lines
23 KiB
C
/*
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* Copyright © 2007 David Airlie
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* David Airlie
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*/
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#include <linux/async.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/console.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/sysrq.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/vga_switcheroo.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_fb_helper.h>
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#include "intel_drv.h"
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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static int intel_fbdev_set_par(struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_set_par(info);
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if (ret == 0) {
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mutex_lock(&fb_helper->dev->struct_mutex);
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intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
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mutex_unlock(&fb_helper->dev->struct_mutex);
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}
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return ret;
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}
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static int intel_fbdev_blank(int blank, struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_blank(blank, info);
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if (ret == 0) {
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mutex_lock(&fb_helper->dev->struct_mutex);
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intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
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mutex_unlock(&fb_helper->dev->struct_mutex);
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}
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return ret;
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}
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static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct drm_fb_helper *fb_helper = info->par;
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struct intel_fbdev *ifbdev =
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container_of(fb_helper, struct intel_fbdev, helper);
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int ret;
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ret = drm_fb_helper_pan_display(var, info);
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if (ret == 0) {
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mutex_lock(&fb_helper->dev->struct_mutex);
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intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
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mutex_unlock(&fb_helper->dev->struct_mutex);
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}
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return ret;
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}
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static struct fb_ops intelfb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = drm_fb_helper_check_var,
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.fb_set_par = intel_fbdev_set_par,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_pan_display = intel_fbdev_pan_display,
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.fb_blank = intel_fbdev_blank,
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.fb_setcmap = drm_fb_helper_setcmap,
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.fb_debug_enter = drm_fb_helper_debug_enter,
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.fb_debug_leave = drm_fb_helper_debug_leave,
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};
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static int intelfb_alloc(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct intel_fbdev *ifbdev =
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container_of(helper, struct intel_fbdev, helper);
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struct drm_framebuffer *fb;
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struct drm_device *dev = helper->dev;
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struct drm_mode_fb_cmd2 mode_cmd = {};
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struct drm_i915_gem_object *obj;
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int size, ret;
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/* we don't do packed 24bpp */
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if (sizes->surface_bpp == 24)
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sizes->surface_bpp = 32;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
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DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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size = PAGE_ALIGN(size);
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obj = i915_gem_object_create_stolen(dev, size);
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if (obj == NULL)
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obj = i915_gem_alloc_object(dev, size);
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if (!obj) {
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DRM_ERROR("failed to allocate framebuffer\n");
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ret = -ENOMEM;
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goto out;
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}
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fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
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if (IS_ERR(fb)) {
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ret = PTR_ERR(fb);
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goto out_unref;
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}
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/* Flush everything out, we'll be doing GTT only from now on */
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ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL, NULL, NULL);
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if (ret) {
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DRM_ERROR("failed to pin obj: %d\n", ret);
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goto out_fb;
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}
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ifbdev->fb = to_intel_framebuffer(fb);
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return 0;
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out_fb:
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drm_framebuffer_remove(fb);
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out_unref:
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drm_gem_object_unreference(&obj->base);
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out:
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return ret;
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}
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static int intelfb_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct intel_fbdev *ifbdev =
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container_of(helper, struct intel_fbdev, helper);
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struct intel_framebuffer *intel_fb = ifbdev->fb;
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struct drm_device *dev = helper->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct fb_info *info;
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struct drm_framebuffer *fb;
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struct drm_i915_gem_object *obj;
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int size, ret;
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bool prealloc = false;
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mutex_lock(&dev->struct_mutex);
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if (intel_fb &&
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(sizes->fb_width > intel_fb->base.width ||
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sizes->fb_height > intel_fb->base.height)) {
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DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
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" releasing it\n",
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intel_fb->base.width, intel_fb->base.height,
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sizes->fb_width, sizes->fb_height);
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drm_framebuffer_unreference(&intel_fb->base);
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intel_fb = ifbdev->fb = NULL;
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}
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if (!intel_fb || WARN_ON(!intel_fb->obj)) {
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DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
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ret = intelfb_alloc(helper, sizes);
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if (ret)
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goto out_unlock;
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intel_fb = ifbdev->fb;
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} else {
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DRM_DEBUG_KMS("re-using BIOS fb\n");
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prealloc = true;
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sizes->fb_width = intel_fb->base.width;
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sizes->fb_height = intel_fb->base.height;
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}
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obj = intel_fb->obj;
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size = obj->base.size;
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info = framebuffer_alloc(0, &dev->pdev->dev);
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if (!info) {
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ret = -ENOMEM;
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goto out_unpin;
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}
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info->par = helper;
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fb = &ifbdev->fb->base;
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ifbdev->helper.fb = fb;
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ifbdev->helper.fbdev = info;
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strcpy(info->fix.id, "inteldrmfb");
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info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
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info->fbops = &intelfb_ops;
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ret = fb_alloc_cmap(&info->cmap, 256, 0);
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if (ret) {
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ret = -ENOMEM;
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goto out_unpin;
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}
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/* setup aperture base/size for vesafb takeover */
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info->apertures = alloc_apertures(1);
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if (!info->apertures) {
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ret = -ENOMEM;
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goto out_unpin;
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}
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info->apertures->ranges[0].base = dev->mode_config.fb_base;
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info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
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info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
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info->fix.smem_len = size;
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info->screen_base =
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ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
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size);
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if (!info->screen_base) {
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ret = -ENOSPC;
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goto out_unpin;
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}
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info->screen_size = size;
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/* This driver doesn't need a VT switch to restore the mode on resume */
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info->skip_vt_switch = true;
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drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
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drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
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/* If the object is shmemfs backed, it will have given us zeroed pages.
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* If the object is stolen however, it will be full of whatever
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* garbage was left in there.
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*/
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if (ifbdev->fb->obj->stolen && !prealloc)
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memset_io(info->screen_base, 0, info->screen_size);
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/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
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DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
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fb->width, fb->height,
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i915_gem_obj_ggtt_offset(obj), obj);
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mutex_unlock(&dev->struct_mutex);
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vga_switcheroo_client_fb_set(dev->pdev, info);
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return 0;
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out_unpin:
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i915_gem_object_ggtt_unpin(obj);
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drm_gem_object_unreference(&obj->base);
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out_unlock:
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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/** Sets the color ramps on behalf of RandR */
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static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
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u16 blue, int regno)
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{
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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intel_crtc->lut_r[regno] = red >> 8;
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intel_crtc->lut_g[regno] = green >> 8;
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intel_crtc->lut_b[regno] = blue >> 8;
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}
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static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
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u16 *blue, int regno)
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{
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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*red = intel_crtc->lut_r[regno] << 8;
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*green = intel_crtc->lut_g[regno] << 8;
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*blue = intel_crtc->lut_b[regno] << 8;
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}
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static struct drm_fb_helper_crtc *
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intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
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{
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int i;
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for (i = 0; i < fb_helper->crtc_count; i++)
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if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
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return &fb_helper->crtc_info[i];
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return NULL;
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}
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/*
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* Try to read the BIOS display configuration and use it for the initial
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* fb configuration.
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*
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* The BIOS or boot loader will generally create an initial display
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* configuration for us that includes some set of active pipes and displays.
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* This routine tries to figure out which pipes and connectors are active
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* and stuffs them into the crtcs and modes array given to us by the
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* drm_fb_helper code.
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*
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* The overall sequence is:
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* intel_fbdev_init - from driver load
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* intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
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* drm_fb_helper_init - build fb helper structs
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* drm_fb_helper_single_add_all_connectors - more fb helper structs
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* intel_fbdev_initial_config - apply the config
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* drm_fb_helper_initial_config - call ->probe then register_framebuffer()
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* drm_setup_crtcs - build crtc config for fbdev
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* intel_fb_initial_config - find active connectors etc
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* drm_fb_helper_single_fb_probe - set up fbdev
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* intelfb_create - re-use or alloc fb, build out fbdev structs
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*
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* Note that we don't make special consideration whether we could actually
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* switch to the selected modes without a full modeset. E.g. when the display
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* is in VGA mode we need to recalculate watermarks and set a new high-res
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* framebuffer anyway.
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*/
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static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
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struct drm_fb_helper_crtc **crtcs,
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struct drm_display_mode **modes,
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struct drm_fb_offset *offsets,
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bool *enabled, int width, int height)
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{
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struct drm_device *dev = fb_helper->dev;
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int i, j;
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bool *save_enabled;
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bool fallback = true;
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int num_connectors_enabled = 0;
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int num_connectors_detected = 0;
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uint64_t conn_configured = 0, mask;
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int pass = 0;
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save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
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GFP_KERNEL);
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if (!save_enabled)
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return false;
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memcpy(save_enabled, enabled, dev->mode_config.num_connector);
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mask = (1 << fb_helper->connector_count) - 1;
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retry:
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for (i = 0; i < fb_helper->connector_count; i++) {
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struct drm_fb_helper_connector *fb_conn;
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struct drm_connector *connector;
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struct drm_encoder *encoder;
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struct drm_fb_helper_crtc *new_crtc;
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fb_conn = fb_helper->connector_info[i];
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connector = fb_conn->connector;
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if (conn_configured & (1 << i))
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continue;
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if (pass == 0 && !connector->has_tile)
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continue;
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if (connector->status == connector_status_connected)
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num_connectors_detected++;
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if (!enabled[i]) {
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DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
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connector->name);
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conn_configured |= (1 << i);
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continue;
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}
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if (connector->force == DRM_FORCE_OFF) {
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DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
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connector->name);
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enabled[i] = false;
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continue;
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}
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encoder = connector->encoder;
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if (!encoder || WARN_ON(!encoder->crtc)) {
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if (connector->force > DRM_FORCE_OFF)
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goto bail;
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DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
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connector->name);
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enabled[i] = false;
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conn_configured |= (1 << i);
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continue;
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}
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num_connectors_enabled++;
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new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
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/*
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* Make sure we're not trying to drive multiple connectors
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* with a single CRTC, since our cloning support may not
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* match the BIOS.
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*/
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for (j = 0; j < fb_helper->connector_count; j++) {
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if (crtcs[j] == new_crtc) {
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DRM_DEBUG_KMS("fallback: cloned configuration\n");
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goto bail;
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}
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}
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DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
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connector->name);
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/* go for command line mode first */
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modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
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/* try for preferred next */
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if (!modes[i]) {
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DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
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connector->name, connector->has_tile);
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modes[i] = drm_has_preferred_mode(fb_conn, width,
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height);
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}
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/* No preferred mode marked by the EDID? Are there any modes? */
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if (!modes[i] && !list_empty(&connector->modes)) {
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DRM_DEBUG_KMS("using first mode listed on connector %s\n",
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connector->name);
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modes[i] = list_first_entry(&connector->modes,
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struct drm_display_mode,
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head);
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}
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/* last resort: use current mode */
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if (!modes[i]) {
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/*
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* IMPORTANT: We want to use the adjusted mode (i.e.
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* after the panel fitter upscaling) as the initial
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* config, not the input mode, which is what crtc->mode
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* usually contains. But since our current
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* code puts a mode derived from the post-pfit timings
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* into crtc->mode this works out correctly.
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*/
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DRM_DEBUG_KMS("looking for current mode on connector %s\n",
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connector->name);
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modes[i] = &encoder->crtc->mode;
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}
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crtcs[i] = new_crtc;
|
|
|
|
DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
|
|
connector->name,
|
|
pipe_name(to_intel_crtc(encoder->crtc)->pipe),
|
|
encoder->crtc->base.id,
|
|
modes[i]->hdisplay, modes[i]->vdisplay,
|
|
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
|
|
|
|
fallback = false;
|
|
conn_configured |= (1 << i);
|
|
}
|
|
|
|
if ((conn_configured & mask) != mask) {
|
|
pass++;
|
|
goto retry;
|
|
}
|
|
|
|
/*
|
|
* If the BIOS didn't enable everything it could, fall back to have the
|
|
* same user experiencing of lighting up as much as possible like the
|
|
* fbdev helper library.
|
|
*/
|
|
if (num_connectors_enabled != num_connectors_detected &&
|
|
num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
|
|
DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
|
|
DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
|
|
num_connectors_detected);
|
|
fallback = true;
|
|
}
|
|
|
|
if (fallback) {
|
|
bail:
|
|
DRM_DEBUG_KMS("Not using firmware configuration\n");
|
|
memcpy(enabled, save_enabled, dev->mode_config.num_connector);
|
|
kfree(save_enabled);
|
|
return false;
|
|
}
|
|
|
|
kfree(save_enabled);
|
|
return true;
|
|
}
|
|
|
|
static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
|
|
.initial_config = intel_fb_initial_config,
|
|
.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->fb->base);
|
|
drm_framebuffer_remove(&ifbdev->fb->base);
|
|
}
|
|
|
|
/*
|
|
* Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
|
|
* The core display code will have read out the current plane configuration,
|
|
* so we use that to figure out if there's an object for us to use as the
|
|
* fb, and if so, we re-use it for the fbdev configuration.
|
|
*
|
|
* Note we only support a single fb shared across pipes for boot (mostly for
|
|
* fbcon), so we just find the biggest and use that.
|
|
*/
|
|
static bool intel_fbdev_init_bios(struct drm_device *dev,
|
|
struct intel_fbdev *ifbdev)
|
|
{
|
|
struct intel_framebuffer *fb = NULL;
|
|
struct drm_crtc *crtc;
|
|
struct intel_crtc *intel_crtc;
|
|
unsigned int max_size = 0;
|
|
|
|
if (!i915.fastboot)
|
|
return false;
|
|
|
|
/* Find the largest fb */
|
|
for_each_crtc(dev, crtc) {
|
|
struct drm_i915_gem_object *obj =
|
|
intel_fb_obj(crtc->primary->state->fb);
|
|
intel_crtc = to_intel_crtc(crtc);
|
|
|
|
if (!intel_crtc->active || !obj) {
|
|
DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
|
|
pipe_name(intel_crtc->pipe));
|
|
continue;
|
|
}
|
|
|
|
if (obj->base.size > max_size) {
|
|
DRM_DEBUG_KMS("found possible fb from plane %c\n",
|
|
pipe_name(intel_crtc->pipe));
|
|
fb = to_intel_framebuffer(crtc->primary->state->fb);
|
|
max_size = obj->base.size;
|
|
}
|
|
}
|
|
|
|
if (!fb) {
|
|
DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
|
|
goto out;
|
|
}
|
|
|
|
/* Now make sure all the pipes will fit into it */
|
|
for_each_crtc(dev, crtc) {
|
|
unsigned int cur_size;
|
|
|
|
intel_crtc = to_intel_crtc(crtc);
|
|
|
|
if (!intel_crtc->active) {
|
|
DRM_DEBUG_KMS("pipe %c not active, skipping\n",
|
|
pipe_name(intel_crtc->pipe));
|
|
continue;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
|
|
pipe_name(intel_crtc->pipe));
|
|
|
|
/*
|
|
* See if the plane fb we found above will fit on this
|
|
* pipe. Note we need to use the selected fb's pitch and bpp
|
|
* rather than the current pipe's, since they differ.
|
|
*/
|
|
cur_size = intel_crtc->config->base.adjusted_mode.crtc_hdisplay;
|
|
cur_size = cur_size * fb->base.bits_per_pixel / 8;
|
|
if (fb->base.pitches[0] < cur_size) {
|
|
DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
|
|
pipe_name(intel_crtc->pipe),
|
|
cur_size, fb->base.pitches[0]);
|
|
fb = NULL;
|
|
break;
|
|
}
|
|
|
|
cur_size = intel_crtc->config->base.adjusted_mode.crtc_vdisplay;
|
|
cur_size = intel_fb_align_height(dev, cur_size,
|
|
fb->base.pixel_format,
|
|
fb->base.modifier[0]);
|
|
cur_size *= fb->base.pitches[0];
|
|
DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
|
|
pipe_name(intel_crtc->pipe),
|
|
intel_crtc->config->base.adjusted_mode.crtc_hdisplay,
|
|
intel_crtc->config->base.adjusted_mode.crtc_vdisplay,
|
|
fb->base.bits_per_pixel,
|
|
cur_size);
|
|
|
|
if (cur_size > max_size) {
|
|
DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
|
|
pipe_name(intel_crtc->pipe),
|
|
cur_size, max_size);
|
|
fb = NULL;
|
|
break;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
|
|
pipe_name(intel_crtc->pipe),
|
|
max_size, cur_size);
|
|
}
|
|
|
|
if (!fb) {
|
|
DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
|
|
goto out;
|
|
}
|
|
|
|
ifbdev->preferred_bpp = fb->base.bits_per_pixel;
|
|
ifbdev->fb = fb;
|
|
|
|
drm_framebuffer_reference(&ifbdev->fb->base);
|
|
|
|
/* Final pass to check if any active pipes don't have fbs */
|
|
for_each_crtc(dev, crtc) {
|
|
intel_crtc = to_intel_crtc(crtc);
|
|
|
|
if (!intel_crtc->active)
|
|
continue;
|
|
|
|
WARN(!crtc->primary->fb,
|
|
"re-used BIOS config but lost an fb on crtc %d\n",
|
|
crtc->base.id);
|
|
}
|
|
|
|
|
|
DRM_DEBUG_KMS("using BIOS fb for initial console\n");
|
|
return true;
|
|
|
|
out:
|
|
|
|
return false;
|
|
}
|
|
|
|
static void intel_fbdev_suspend_worker(struct work_struct *work)
|
|
{
|
|
intel_fbdev_set_suspend(container_of(work,
|
|
struct drm_i915_private,
|
|
fbdev_suspend_work)->dev,
|
|
FBINFO_STATE_RUNNING,
|
|
true);
|
|
}
|
|
|
|
int intel_fbdev_init(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int ret;
|
|
|
|
if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
|
|
return -ENODEV;
|
|
|
|
ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
|
|
if (ifbdev == NULL)
|
|
return -ENOMEM;
|
|
|
|
drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
|
|
|
|
if (!intel_fbdev_init_bios(dev, ifbdev))
|
|
ifbdev->preferred_bpp = 32;
|
|
|
|
ret = drm_fb_helper_init(dev, &ifbdev->helper,
|
|
INTEL_INFO(dev)->num_pipes, 4);
|
|
if (ret) {
|
|
kfree(ifbdev);
|
|
return ret;
|
|
}
|
|
|
|
dev_priv->fbdev = ifbdev;
|
|
INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker);
|
|
|
|
drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
|
|
{
|
|
struct drm_i915_private *dev_priv = data;
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
|
|
/* Due to peculiar init order wrt to hpd handling this is separate. */
|
|
drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
|
|
}
|
|
|
|
void intel_fbdev_fini(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
if (!dev_priv->fbdev)
|
|
return;
|
|
|
|
flush_work(&dev_priv->fbdev_suspend_work);
|
|
|
|
async_synchronize_full();
|
|
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, bool synchronous)
|
|
{
|
|
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;
|
|
|
|
if (synchronous) {
|
|
/* Flush any pending work to turn the console on, and then
|
|
* wait to turn it off. It must be synchronous as we are
|
|
* about to suspend or unload the driver.
|
|
*
|
|
* Note that from within the work-handler, we cannot flush
|
|
* ourselves, so only flush outstanding work upon suspend!
|
|
*/
|
|
if (state != FBINFO_STATE_RUNNING)
|
|
flush_work(&dev_priv->fbdev_suspend_work);
|
|
console_lock();
|
|
} else {
|
|
/*
|
|
* The console lock can be pretty contented on resume due
|
|
* to all the printk activity. Try to keep it out of the hot
|
|
* path of resume if possible.
|
|
*/
|
|
WARN_ON(state != FBINFO_STATE_RUNNING);
|
|
if (!console_trylock()) {
|
|
/* Don't block our own workqueue as this can
|
|
* be run in parallel with other i915.ko tasks.
|
|
*/
|
|
schedule_work(&dev_priv->fbdev_suspend_work);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* 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->fb->obj->stolen)
|
|
memset_io(info->screen_base, 0, info->screen_size);
|
|
|
|
fb_set_suspend(info, state);
|
|
console_unlock();
|
|
}
|
|
|
|
void intel_fbdev_output_poll_changed(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
if (dev_priv->fbdev)
|
|
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;
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
struct drm_fb_helper *fb_helper;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
fb_helper = &ifbdev->helper;
|
|
|
|
ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
|
|
if (ret) {
|
|
DRM_DEBUG("failed to restore crtc mode\n");
|
|
} else {
|
|
mutex_lock(&fb_helper->dev->struct_mutex);
|
|
intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT);
|
|
mutex_unlock(&fb_helper->dev->struct_mutex);
|
|
}
|
|
}
|