| /* |
| * Copyright (C) 2015 Red Hat, Inc. |
| * All Rights Reserved. |
| * |
| * Authors: |
| * Dave Airlie |
| * Alon Levy |
| * |
| * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. |
| */ |
| |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_damage_helper.h> |
| #include <drm/drm_fourcc.h> |
| #include <drm/drm_gem_framebuffer_helper.h> |
| #include <drm/drm_probe_helper.h> |
| #include <drm/drm_vblank.h> |
| |
| #include "virtgpu_drv.h" |
| |
| #define XRES_MIN 32 |
| #define YRES_MIN 32 |
| |
| #define XRES_DEF 1024 |
| #define YRES_DEF 768 |
| |
| #define XRES_MAX 8192 |
| #define YRES_MAX 8192 |
| |
| static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = { |
| .set_config = drm_atomic_helper_set_config, |
| .destroy = drm_crtc_cleanup, |
| |
| .page_flip = drm_atomic_helper_page_flip, |
| .reset = drm_atomic_helper_crtc_reset, |
| .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, |
| .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, |
| }; |
| |
| static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = { |
| .create_handle = drm_gem_fb_create_handle, |
| .destroy = drm_gem_fb_destroy, |
| .dirty = drm_atomic_helper_dirtyfb, |
| }; |
| |
| int |
| virtio_gpu_framebuffer_init(struct drm_device *dev, |
| struct virtio_gpu_framebuffer *vgfb, |
| const struct drm_mode_fb_cmd2 *mode_cmd, |
| struct drm_gem_object *obj) |
| { |
| int ret; |
| |
| vgfb->base.obj[0] = obj; |
| |
| drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); |
| |
| ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs); |
| if (ret) { |
| vgfb->base.obj[0] = NULL; |
| return ret; |
| } |
| return 0; |
| } |
| |
| static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct virtio_gpu_device *vgdev = dev->dev_private; |
| struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); |
| |
| virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, |
| crtc->mode.hdisplay, |
| crtc->mode.vdisplay, 0, 0); |
| } |
| |
| static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, |
| struct drm_crtc_state *old_state) |
| { |
| struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); |
| |
| output->enabled = true; |
| } |
| |
| static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, |
| struct drm_crtc_state *old_state) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct virtio_gpu_device *vgdev = dev->dev_private; |
| struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); |
| |
| virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0); |
| output->enabled = false; |
| } |
| |
| static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, |
| struct drm_crtc_state *state) |
| { |
| return 0; |
| } |
| |
| static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, |
| struct drm_crtc_state *old_state) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&crtc->dev->event_lock, flags); |
| if (crtc->state->event) |
| drm_crtc_send_vblank_event(crtc, crtc->state->event); |
| crtc->state->event = NULL; |
| spin_unlock_irqrestore(&crtc->dev->event_lock, flags); |
| } |
| |
| static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = { |
| .mode_set_nofb = virtio_gpu_crtc_mode_set_nofb, |
| .atomic_check = virtio_gpu_crtc_atomic_check, |
| .atomic_flush = virtio_gpu_crtc_atomic_flush, |
| .atomic_enable = virtio_gpu_crtc_atomic_enable, |
| .atomic_disable = virtio_gpu_crtc_atomic_disable, |
| }; |
| |
| static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder, |
| struct drm_display_mode *mode, |
| struct drm_display_mode *adjusted_mode) |
| { |
| } |
| |
| static void virtio_gpu_enc_enable(struct drm_encoder *encoder) |
| { |
| } |
| |
| static void virtio_gpu_enc_disable(struct drm_encoder *encoder) |
| { |
| } |
| |
| static int virtio_gpu_conn_get_modes(struct drm_connector *connector) |
| { |
| struct virtio_gpu_output *output = |
| drm_connector_to_virtio_gpu_output(connector); |
| struct drm_display_mode *mode = NULL; |
| int count, width, height; |
| |
| if (output->edid) { |
| count = drm_add_edid_modes(connector, output->edid); |
| if (count) |
| return count; |
| } |
| |
| width = le32_to_cpu(output->info.r.width); |
| height = le32_to_cpu(output->info.r.height); |
| count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); |
| |
| if (width == 0 || height == 0) { |
| width = XRES_DEF; |
| height = YRES_DEF; |
| drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); |
| } else { |
| DRM_DEBUG("add mode: %dx%d\n", width, height); |
| mode = drm_cvt_mode(connector->dev, width, height, 60, |
| false, false, false); |
| mode->type |= DRM_MODE_TYPE_PREFERRED; |
| drm_mode_probed_add(connector, mode); |
| count++; |
| } |
| |
| return count; |
| } |
| |
| static enum drm_mode_status virtio_gpu_conn_mode_valid(struct drm_connector *connector, |
| struct drm_display_mode *mode) |
| { |
| struct virtio_gpu_output *output = |
| drm_connector_to_virtio_gpu_output(connector); |
| int width, height; |
| |
| width = le32_to_cpu(output->info.r.width); |
| height = le32_to_cpu(output->info.r.height); |
| |
| if (!(mode->type & DRM_MODE_TYPE_PREFERRED)) |
| return MODE_OK; |
| if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF) |
| return MODE_OK; |
| if (mode->hdisplay <= width && mode->hdisplay >= width - 16 && |
| mode->vdisplay <= height && mode->vdisplay >= height - 16) |
| return MODE_OK; |
| |
| DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay); |
| return MODE_BAD; |
| } |
| |
| static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = { |
| .mode_set = virtio_gpu_enc_mode_set, |
| .enable = virtio_gpu_enc_enable, |
| .disable = virtio_gpu_enc_disable, |
| }; |
| |
| static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = { |
| .get_modes = virtio_gpu_conn_get_modes, |
| .mode_valid = virtio_gpu_conn_mode_valid, |
| }; |
| |
| static enum drm_connector_status virtio_gpu_conn_detect( |
| struct drm_connector *connector, |
| bool force) |
| { |
| struct virtio_gpu_output *output = |
| drm_connector_to_virtio_gpu_output(connector); |
| |
| if (output->info.enabled) |
| return connector_status_connected; |
| else |
| return connector_status_disconnected; |
| } |
| |
| static void virtio_gpu_conn_destroy(struct drm_connector *connector) |
| { |
| drm_connector_unregister(connector); |
| drm_connector_cleanup(connector); |
| } |
| |
| static const struct drm_connector_funcs virtio_gpu_connector_funcs = { |
| .detect = virtio_gpu_conn_detect, |
| .fill_modes = drm_helper_probe_single_connector_modes, |
| .destroy = virtio_gpu_conn_destroy, |
| .reset = drm_atomic_helper_connector_reset, |
| .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, |
| .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
| }; |
| |
| static const struct drm_encoder_funcs virtio_gpu_enc_funcs = { |
| .destroy = drm_encoder_cleanup, |
| }; |
| |
| static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) |
| { |
| struct drm_device *dev = vgdev->ddev; |
| struct virtio_gpu_output *output = vgdev->outputs + index; |
| struct drm_connector *connector = &output->conn; |
| struct drm_encoder *encoder = &output->enc; |
| struct drm_crtc *crtc = &output->crtc; |
| struct drm_plane *primary, *cursor; |
| |
| output->index = index; |
| if (index == 0) { |
| output->info.enabled = cpu_to_le32(true); |
| output->info.r.width = cpu_to_le32(XRES_DEF); |
| output->info.r.height = cpu_to_le32(YRES_DEF); |
| } |
| |
| primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index); |
| if (IS_ERR(primary)) |
| return PTR_ERR(primary); |
| cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index); |
| if (IS_ERR(cursor)) |
| return PTR_ERR(cursor); |
| drm_crtc_init_with_planes(dev, crtc, primary, cursor, |
| &virtio_gpu_crtc_funcs, NULL); |
| drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs); |
| |
| drm_connector_init(dev, connector, &virtio_gpu_connector_funcs, |
| DRM_MODE_CONNECTOR_VIRTUAL); |
| drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); |
| if (vgdev->has_edid) |
| drm_connector_attach_edid_property(connector); |
| |
| drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs, |
| DRM_MODE_ENCODER_VIRTUAL, NULL); |
| drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs); |
| encoder->possible_crtcs = 1 << index; |
| |
| drm_connector_attach_encoder(connector, encoder); |
| drm_connector_register(connector); |
| return 0; |
| } |
| |
| static struct drm_framebuffer * |
| virtio_gpu_user_framebuffer_create(struct drm_device *dev, |
| struct drm_file *file_priv, |
| const struct drm_mode_fb_cmd2 *mode_cmd) |
| { |
| struct drm_gem_object *obj = NULL; |
| struct virtio_gpu_framebuffer *virtio_gpu_fb; |
| int ret; |
| |
| if (mode_cmd->pixel_format != DRM_FORMAT_HOST_XRGB8888 && |
| mode_cmd->pixel_format != DRM_FORMAT_HOST_ARGB8888) |
| return ERR_PTR(-ENOENT); |
| |
| /* lookup object associated with res handle */ |
| obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]); |
| if (!obj) |
| return ERR_PTR(-EINVAL); |
| |
| virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL); |
| if (virtio_gpu_fb == NULL) |
| return ERR_PTR(-ENOMEM); |
| |
| ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj); |
| if (ret) { |
| kfree(virtio_gpu_fb); |
| drm_gem_object_put_unlocked(obj); |
| return NULL; |
| } |
| |
| return &virtio_gpu_fb->base; |
| } |
| |
| static void vgdev_atomic_commit_tail(struct drm_atomic_state *state) |
| { |
| struct drm_device *dev = state->dev; |
| |
| drm_atomic_helper_commit_modeset_disables(dev, state); |
| drm_atomic_helper_commit_modeset_enables(dev, state); |
| drm_atomic_helper_commit_planes(dev, state, 0); |
| |
| drm_atomic_helper_commit_hw_done(state); |
| |
| drm_atomic_helper_wait_for_vblanks(dev, state); |
| drm_atomic_helper_cleanup_planes(dev, state); |
| } |
| |
| static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = { |
| .atomic_commit_tail = vgdev_atomic_commit_tail, |
| }; |
| |
| static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = { |
| .fb_create = virtio_gpu_user_framebuffer_create, |
| .atomic_check = drm_atomic_helper_check, |
| .atomic_commit = drm_atomic_helper_commit, |
| }; |
| |
| void virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) |
| { |
| int i; |
| |
| drm_mode_config_init(vgdev->ddev); |
| vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true; |
| vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; |
| vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers; |
| |
| /* modes will be validated against the framebuffer size */ |
| vgdev->ddev->mode_config.min_width = XRES_MIN; |
| vgdev->ddev->mode_config.min_height = YRES_MIN; |
| vgdev->ddev->mode_config.max_width = XRES_MAX; |
| vgdev->ddev->mode_config.max_height = YRES_MAX; |
| |
| for (i = 0 ; i < vgdev->num_scanouts; ++i) |
| vgdev_output_init(vgdev, i); |
| |
| drm_mode_config_reset(vgdev->ddev); |
| } |
| |
| void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev) |
| { |
| int i; |
| |
| for (i = 0 ; i < vgdev->num_scanouts; ++i) |
| kfree(vgdev->outputs[i].edid); |
| drm_atomic_helper_shutdown(vgdev->ddev); |
| drm_mode_config_cleanup(vgdev->ddev); |
| } |