148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
#include <linux/dma-buf-map.h>
|
|
|
|
#include <drm/drm_atomic.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>
|
|
#include <drm/drm_gem_shmem_helper.h>
|
|
|
|
#include "vkms_drv.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]) {
|
|
DRM_DEBUG_KMS("Invalid pixel format %p4cc\n",
|
|
&fb->format->format);
|
|
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 drm_gem_object *gem_obj;
|
|
struct dma_buf_map map;
|
|
int ret;
|
|
|
|
if (!job->fb)
|
|
return 0;
|
|
|
|
gem_obj = drm_gem_fb_get_obj(job->fb, 0);
|
|
ret = drm_gem_shmem_vmap(gem_obj, &map);
|
|
if (ret) {
|
|
DRM_ERROR("vmap failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
job->priv = map.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;
|
|
struct dma_buf_map map;
|
|
|
|
if (!job->fb)
|
|
return;
|
|
|
|
gem_obj = drm_gem_fb_get_obj(job->fb, 0);
|
|
dma_buf_map_set_vaddr(&map, job->priv);
|
|
drm_gem_shmem_vunmap(gem_obj, &map);
|
|
|
|
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_atomic_state *state)
|
|
{
|
|
struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
|
|
conn);
|
|
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, connector_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));
|
|
}
|