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path: root/drivers/gpu/drm/i915/intel_fbdev.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_fbdev.c')
-rw-r--r--drivers/gpu/drm/i915/intel_fbdev.c323
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);
+}