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- // SPDX-License-Identifier: GPL-2.0+
- #include "vkms_drv.h"
- #include <drm/drm_fourcc.h>
- #include <drm/drm_writeback.h>
- #include <drm/drm_probe_helper.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_gem_framebuffer_helper.h>
- static const u32 vkms_wb_formats[] = {
- DRM_FORMAT_XRGB8888,
- };
- static const struct drm_connector_funcs vkms_wb_connector_funcs = {
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = drm_connector_cleanup,
- .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 vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
- {
- struct drm_framebuffer *fb;
- const struct drm_display_mode *mode = &crtc_state->mode;
- if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
- return 0;
- fb = conn_state->writeback_job->fb;
- if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
- DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
- fb->width, fb->height);
- return -EINVAL;
- }
- if (fb->format->format != vkms_wb_formats[0]) {
- struct drm_format_name_buf format_name;
- DRM_DEBUG_KMS("Invalid pixel format %s\n",
- drm_get_format_name(fb->format->format,
- &format_name));
- return -EINVAL;
- }
- return 0;
- }
- static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = {
- .atomic_check = vkms_wb_encoder_atomic_check,
- };
- static int vkms_wb_connector_get_modes(struct drm_connector *connector)
- {
- struct drm_device *dev = connector->dev;
- return drm_add_modes_noedid(connector, dev->mode_config.max_width,
- dev->mode_config.max_height);
- }
- static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector,
- struct drm_writeback_job *job)
- {
- struct vkms_gem_object *vkms_obj;
- struct drm_gem_object *gem_obj;
- int ret;
- if (!job->fb)
- return 0;
- gem_obj = drm_gem_fb_get_obj(job->fb, 0);
- ret = vkms_gem_vmap(gem_obj);
- if (ret) {
- DRM_ERROR("vmap failed: %d\n", ret);
- return ret;
- }
- vkms_obj = drm_gem_to_vkms_gem(gem_obj);
- job->priv = vkms_obj->vaddr;
- return 0;
- }
- static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
- struct drm_writeback_job *job)
- {
- struct drm_gem_object *gem_obj;
- struct vkms_device *vkmsdev;
- if (!job->fb)
- return;
- gem_obj = drm_gem_fb_get_obj(job->fb, 0);
- vkms_gem_vunmap(gem_obj);
- vkmsdev = drm_device_to_vkms_device(gem_obj->dev);
- vkms_set_composer(&vkmsdev->output, false);
- }
- static void vkms_wb_atomic_commit(struct drm_connector *conn,
- struct drm_connector_state *state)
- {
- struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
- struct vkms_output *output = &vkmsdev->output;
- struct drm_writeback_connector *wb_conn = &output->wb_connector;
- struct drm_connector_state *conn_state = wb_conn->base.state;
- struct vkms_crtc_state *crtc_state = output->composer_state;
- if (!conn_state)
- return;
- vkms_set_composer(&vkmsdev->output, true);
- spin_lock_irq(&output->composer_lock);
- crtc_state->active_writeback = conn_state->writeback_job->priv;
- crtc_state->wb_pending = true;
- spin_unlock_irq(&output->composer_lock);
- drm_writeback_queue_job(wb_conn, state);
- }
- static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
- .get_modes = vkms_wb_connector_get_modes,
- .prepare_writeback_job = vkms_wb_prepare_job,
- .cleanup_writeback_job = vkms_wb_cleanup_job,
- .atomic_commit = vkms_wb_atomic_commit,
- };
- int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
- {
- struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
- vkmsdev->output.wb_connector.encoder.possible_crtcs = 1;
- drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
- return drm_writeback_connector_init(&vkmsdev->drm, wb,
- &vkms_wb_connector_funcs,
- &vkms_wb_encoder_helper_funcs,
- vkms_wb_formats,
- ARRAY_SIZE(vkms_wb_formats));
- }
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