1 files changed, 323 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
new file mode 100644
index 000000000000..895fcb4fbd94
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -0,0 +1,323 @@
+/*
+ * 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_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 drm_device *dev = helper->dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct fb_info *info;
+        struct drm_framebuffer *fb;
+        struct drm_mode_fb_cmd2 mode_cmd = {};
+        struct drm_i915_gem_object *obj;
+        struct device *device = &dev->pdev->dev;
+        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;
+        }
+
+        mutex_lock(&dev->struct_mutex);
+
+        /* 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;
+        }
+
+        info = framebuffer_alloc(0, device);
+        if (!info) {
+                ret = -ENOMEM;
+                goto out_unpin;
+        }
+
+        info->par = helper;
+
+        ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
+        if (ret)
+                goto out_unpin;
+
+        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);
+out_unref:
+        drm_gem_object_unreference(&obj->base);
+        mutex_unlock(&dev->struct_mutex);
+out:
+        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);
+}