diff options
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_display.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_display.c | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c new file mode 100644 index 000000000..9ea7611a9 --- /dev/null +++ b/drivers/gpu/drm/virtio/virtgpu_display.c @@ -0,0 +1,367 @@ +/* + * 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_edid.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.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 + +#define drm_connector_to_virtio_gpu_output(x) \ + container_of(x, struct virtio_gpu_output, conn) + +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, +}; + +static 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); + virtio_gpu_notify(vgdev); +} + +static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ +} + +static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_atomic_state *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); + virtio_gpu_notify(vgdev); +} + +static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + return 0; +} + +static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, + crtc); + struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); + + /* + * virtio-gpu can't do modeset and plane update operations + * independent from each other. So the actual modeset happens + * in the plane update callback, and here we just check + * whenever we must force the modeset. + */ + if (drm_atomic_crtc_needs_modeset(crtc_state)) { + output->needs_modeset = true; + } +} + +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) { + 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); + if (!mode) + return count; + 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 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_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL); + 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) { + drm_gem_object_put(obj); + 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(obj); + return NULL; + } + + return &virtio_gpu_fb->base; +} + +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, +}; + +int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) +{ + int i, ret; + + ret = drmm_mode_config_init(vgdev->ddev); + if (ret) + return ret; + + vgdev->ddev->mode_config.quirk_addfb_prefer_host_byte_order = true; + vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs; + + /* 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; + + vgdev->ddev->mode_config.fb_modifiers_not_supported = true; + + for (i = 0 ; i < vgdev->num_scanouts; ++i) + vgdev_output_init(vgdev, i); + + drm_mode_config_reset(vgdev->ddev); + return 0; +} + +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); +} |