From b4b01b4995fb15b55a2d067eb405917f5ab32709 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 30 Oct 2018 07:32:06 +0100 Subject: drm/virtio: add edid support linux guest driver implementation of the VIRTIO_GPU_F_EDID feature. Signed-off-by: Gerd Hoffmann Acked-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20181030063206.19528-3-kraxel@redhat.com --- drivers/gpu/drm/virtio/virtgpu_display.c | 12 ++++++ drivers/gpu/drm/virtio/virtgpu_drv.c | 1 + drivers/gpu/drm/virtio/virtgpu_drv.h | 3 ++ drivers/gpu/drm/virtio/virtgpu_kms.c | 8 ++++ drivers/gpu/drm/virtio/virtgpu_vq.c | 67 ++++++++++++++++++++++++++++++++ 5 files changed, 91 insertions(+) (limited to 'drivers/gpu/drm/virtio') diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c index 8f8fed471e34..b5580b11a063 100644 --- a/drivers/gpu/drm/virtio/virtgpu_display.c +++ b/drivers/gpu/drm/virtio/virtgpu_display.c @@ -169,6 +169,12 @@ static int virtio_gpu_conn_get_modes(struct drm_connector *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); @@ -287,6 +293,8 @@ static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index) 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); @@ -378,6 +386,10 @@ int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev) 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); virtio_gpu_fbdev_fini(vgdev); drm_mode_config_cleanup(vgdev->ddev); } diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index d9287c144fe5..f7f32a885af7 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -80,6 +80,7 @@ static unsigned int features[] = { */ VIRTIO_GPU_F_VIRGL, #endif + VIRTIO_GPU_F_EDID, }; static struct virtio_driver virtio_gpu_driver = { .feature_table = features, diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 4632bd7e1972..7bec6e36886b 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -115,6 +115,7 @@ struct virtio_gpu_output { struct drm_encoder enc; struct virtio_gpu_display_one info; struct virtio_gpu_update_cursor cursor; + struct edid *edid; int cur_x; int cur_y; bool enabled; @@ -204,6 +205,7 @@ struct virtio_gpu_device { struct ida ctx_id_ida; bool has_virgl_3d; + bool has_edid; struct work_struct config_changed_work; @@ -294,6 +296,7 @@ int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx); int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev, int idx, int version, struct virtio_gpu_drv_cap_cache **cache_p); +int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev); void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id, uint32_t nlen, const char *name); void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev, diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c index 691b842d5f3a..3af6181c05a8 100644 --- a/drivers/gpu/drm/virtio/virtgpu_kms.c +++ b/drivers/gpu/drm/virtio/virtgpu_kms.c @@ -44,6 +44,8 @@ static void virtio_gpu_config_changed_work_func(struct work_struct *work) virtio_cread(vgdev->vdev, struct virtio_gpu_config, events_read, &events_read); if (events_read & VIRTIO_GPU_EVENT_DISPLAY) { + if (vgdev->has_edid) + virtio_gpu_cmd_get_edids(vgdev); virtio_gpu_cmd_get_display_info(vgdev); drm_helper_hpd_irq_event(vgdev->ddev); events_clear |= VIRTIO_GPU_EVENT_DISPLAY; @@ -156,6 +158,10 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags) #else DRM_INFO("virgl 3d acceleration not supported by guest\n"); #endif + if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_EDID)) { + vgdev->has_edid = true; + DRM_INFO("EDID support available.\n"); + } ret = virtio_find_vqs(vgdev->vdev, 2, vqs, callbacks, names, NULL); if (ret) { @@ -201,6 +207,8 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags) if (num_capsets) virtio_gpu_get_capsets(vgdev, num_capsets); + if (vgdev->has_edid) + virtio_gpu_cmd_get_edids(vgdev); virtio_gpu_cmd_get_display_info(vgdev); wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending, 5 * HZ); diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 93f2c3a51ee8..2c6764f08f18 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -584,6 +584,45 @@ static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev, wake_up(&vgdev->resp_wq); } +static int virtio_get_edid_block(void *data, u8 *buf, + unsigned int block, size_t len) +{ + struct virtio_gpu_resp_edid *resp = data; + size_t start = block * EDID_LENGTH; + + if (start + len > le32_to_cpu(resp->size)) + return -1; + memcpy(buf, resp->edid + start, len); + return 0; +} + +static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev, + struct virtio_gpu_vbuffer *vbuf) +{ + struct virtio_gpu_cmd_get_edid *cmd = + (struct virtio_gpu_cmd_get_edid *)vbuf->buf; + struct virtio_gpu_resp_edid *resp = + (struct virtio_gpu_resp_edid *)vbuf->resp_buf; + uint32_t scanout = le32_to_cpu(cmd->scanout); + struct virtio_gpu_output *output; + struct edid *new_edid, *old_edid; + + if (scanout >= vgdev->num_scanouts) + return; + output = vgdev->outputs + scanout; + + new_edid = drm_do_get_edid(&output->conn, virtio_get_edid_block, resp); + + spin_lock(&vgdev->display_info_lock); + old_edid = output->edid; + output->edid = new_edid; + drm_connector_update_edid_property(&output->conn, output->edid); + spin_unlock(&vgdev->display_info_lock); + + kfree(old_edid); + wake_up(&vgdev->resp_wq); +} + int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev) { struct virtio_gpu_ctrl_hdr *cmd_p; @@ -686,6 +725,34 @@ int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev, return 0; } +int virtio_gpu_cmd_get_edids(struct virtio_gpu_device *vgdev) +{ + struct virtio_gpu_cmd_get_edid *cmd_p; + struct virtio_gpu_vbuffer *vbuf; + void *resp_buf; + int scanout; + + if (WARN_ON(!vgdev->has_edid)) + return -EINVAL; + + for (scanout = 0; scanout < vgdev->num_scanouts; scanout++) { + resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_edid), + GFP_KERNEL); + if (!resp_buf) + return -ENOMEM; + + cmd_p = virtio_gpu_alloc_cmd_resp + (vgdev, &virtio_gpu_cmd_get_edid_cb, &vbuf, + sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_edid), + resp_buf); + cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_EDID); + cmd_p->scanout = cpu_to_le32(scanout); + virtio_gpu_queue_ctrl_buffer(vgdev, vbuf); + } + + return 0; +} + void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id, uint32_t nlen, const char *name) { -- cgit v1.2.3-55-g7522