mirror of https://gitee.com/openkylin/linux.git
858 lines
24 KiB
C
858 lines
24 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 = drm_fb_helper_cfb_fillrect,
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.fb_copyarea = drm_fb_helper_cfb_copyarea,
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.fb_imageblit = drm_fb_helper_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_i915_private *dev_priv = to_i915(dev);
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struct i915_ggtt *ggtt = &dev_priv->ggtt;
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struct drm_mode_fb_cmd2 mode_cmd = {};
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struct drm_i915_gem_object *obj = NULL;
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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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mutex_lock(&dev->struct_mutex);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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size = PAGE_ALIGN(size);
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/* If the FB is too big, just don't use it since fbdev is not very
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* important and we should probably use that space with FBC or other
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* features. */
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if (size * 2 < ggtt->stolen_usable_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_object_create(dev, size);
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if (IS_ERR(obj)) {
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DRM_ERROR("failed to allocate framebuffer\n");
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ret = PTR_ERR(obj);
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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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drm_gem_object_unreference(&obj->base);
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ret = PTR_ERR(fb);
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goto out;
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}
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mutex_unlock(&dev->struct_mutex);
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ifbdev->fb = to_intel_framebuffer(fb);
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return 0;
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out:
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mutex_unlock(&dev->struct_mutex);
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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 = to_i915(dev);
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struct i915_ggtt *ggtt = &dev_priv->ggtt;
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struct fb_info *info;
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struct drm_framebuffer *fb;
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struct i915_vma *vma;
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struct drm_i915_gem_object *obj;
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bool prealloc = false;
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void *vaddr;
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int ret;
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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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return ret;
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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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mutex_lock(&dev->struct_mutex);
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/* Pin the GGTT vma for our access via info->screen_base.
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* This also validates that any existing fb inherited from the
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* BIOS is suitable for own access.
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*/
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ret = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
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if (ret)
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goto out_unlock;
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info = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(info)) {
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DRM_ERROR("Failed to allocate fb_info\n");
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ret = PTR_ERR(info);
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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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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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vma = i915_gem_obj_to_ggtt(obj);
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/* setup aperture base/size for vesafb takeover */
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info->apertures->ranges[0].base = dev->mode_config.fb_base;
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info->apertures->ranges[0].size = ggtt->mappable_end;
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info->fix.smem_start = dev->mode_config.fb_base + vma->node.start;
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info->fix.smem_len = vma->node.size;
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vaddr = i915_vma_pin_iomap(vma);
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if (IS_ERR(vaddr)) {
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DRM_ERROR("Failed to remap framebuffer into virtual memory\n");
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ret = PTR_ERR(vaddr);
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goto out_destroy_fbi;
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}
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info->screen_base = vaddr;
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info->screen_size = vma->node.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%08llx, 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_destroy_fbi:
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drm_fb_helper_release_fbi(helper);
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out_unpin:
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intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
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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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unsigned long conn_configured, mask;
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unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
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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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int pass = 0;
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save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
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if (!save_enabled)
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return false;
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memcpy(save_enabled, enabled, count);
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mask = BIT(count) - 1;
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conn_configured = 0;
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retry:
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for (i = 0; i < 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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struct intel_crtc *intel_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 & BIT(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 |= BIT(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->state->best_encoder;
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if (!encoder || WARN_ON(!connector->state->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 |= BIT(i);
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continue;
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}
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num_connectors_enabled++;
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intel_crtc = to_intel_crtc(connector->state->crtc);
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for (j = 0; j < 256; j++) {
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intel_crtc->lut_r[j] = j;
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intel_crtc->lut_g[j] = j;
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intel_crtc->lut_b[j] = j;
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}
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new_crtc = intel_fb_helper_crtc(fb_helper,
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connector->state->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 < 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.
|
|
*
|
|
* This is crtc->mode and not crtc->state->mode for the
|
|
* fastboot check to work correctly. crtc_state->mode has
|
|
* I915_MODE_FLAG_INHERITED, which we clear to force check
|
|
* state.
|
|
*/
|
|
DRM_DEBUG_KMS("looking for current mode on connector %s\n",
|
|
connector->name);
|
|
modes[i] = &connector->state->crtc->mode;
|
|
}
|
|
crtcs[i] = new_crtc;
|
|
|
|
DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
|
|
connector->name,
|
|
connector->state->crtc->base.id,
|
|
connector->state->crtc->name,
|
|
modes[i]->hdisplay, modes[i]->vdisplay,
|
|
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
|
|
|
|
fallback = false;
|
|
conn_configured |= BIT(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, count);
|
|
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 intel_fbdev *ifbdev)
|
|
{
|
|
/* We rely on the object-free to release the VMA pinning for
|
|
* the info->screen_base mmaping. Leaking the VMA is simpler than
|
|
* trying to rectify all the possible error paths leading here.
|
|
*/
|
|
|
|
drm_fb_helper_unregister_fbi(&ifbdev->helper);
|
|
drm_fb_helper_release_fbi(&ifbdev->helper);
|
|
|
|
drm_fb_helper_fini(&ifbdev->helper);
|
|
|
|
if (ifbdev->fb) {
|
|
mutex_lock(&ifbdev->helper.dev->struct_mutex);
|
|
intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
|
|
mutex_unlock(&ifbdev->helper.dev->struct_mutex);
|
|
|
|
drm_framebuffer_remove(&ifbdev->fb->base);
|
|
}
|
|
|
|
kfree(ifbdev);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* 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 (!crtc->state->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 (!crtc->state->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 (!crtc->state->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)->drm,
|
|
FBINFO_STATE_RUNNING,
|
|
true);
|
|
}
|
|
|
|
int intel_fbdev_init(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev;
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
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;
|
|
}
|
|
|
|
static void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
|
|
{
|
|
struct intel_fbdev *ifbdev = data;
|
|
|
|
/* Due to peculiar init order wrt to hpd handling this is separate. */
|
|
if (drm_fb_helper_initial_config(&ifbdev->helper,
|
|
ifbdev->preferred_bpp))
|
|
intel_fbdev_fini(ifbdev->helper.dev);
|
|
}
|
|
|
|
void intel_fbdev_initial_config_async(struct drm_device *dev)
|
|
{
|
|
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
|
|
|
|
ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
|
|
}
|
|
|
|
static void intel_fbdev_sync(struct intel_fbdev *ifbdev)
|
|
{
|
|
if (!ifbdev->cookie)
|
|
return;
|
|
|
|
/* Only serialises with all preceding async calls, hence +1 */
|
|
async_synchronize_cookie(ifbdev->cookie + 1);
|
|
ifbdev->cookie = 0;
|
|
}
|
|
|
|
void intel_fbdev_fini(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
flush_work(&dev_priv->fbdev_suspend_work);
|
|
if (!current_is_async())
|
|
intel_fbdev_sync(ifbdev);
|
|
|
|
intel_fbdev_destroy(ifbdev);
|
|
dev_priv->fbdev = NULL;
|
|
}
|
|
|
|
void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
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);
|
|
|
|
drm_fb_helper_set_suspend(&ifbdev->helper, state);
|
|
console_unlock();
|
|
}
|
|
|
|
void intel_fbdev_output_poll_changed(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = to_i915(dev);
|
|
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 = to_i915(dev);
|
|
struct intel_fbdev *ifbdev = dev_priv->fbdev;
|
|
struct drm_fb_helper *fb_helper;
|
|
|
|
if (!ifbdev)
|
|
return;
|
|
|
|
intel_fbdev_sync(ifbdev);
|
|
|
|
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);
|
|
}
|
|
}
|