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path: root/drivers/gpu/drm/virtio/virtgpu_display.c
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Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_display.c')
-rw-r--r--drivers/gpu/drm/virtio/virtgpu_display.c367
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);
+}