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// SPDX-License-Identifier: GPL-2.0+
#include "vkms_drv.h"
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_probe_helper.h>
static const struct drm_connector_funcs vkms_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 const struct drm_encoder_funcs vkms_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int vkms_conn_get_modes(struct drm_connector *connector)
{
int count;
/* Use the default modes list from DRM */
count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
return count;
}
static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
.get_modes = vkms_conn_get_modes,
};
static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index,
struct drm_crtc *crtc)
{
struct vkms_plane *overlay;
overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
if (IS_ERR(overlay))
return PTR_ERR(overlay);
if (!overlay->base.possible_crtcs)
overlay->base.possible_crtcs = drm_crtc_mask(crtc);
return 0;
}
int vkms_output_init(struct vkms_device *vkmsdev, int index)
{
struct vkms_output *output = &vkmsdev->output;
struct drm_device *dev = &vkmsdev->drm;
struct drm_connector *connector = &output->connector;
struct drm_encoder *encoder = &output->encoder;
struct drm_crtc *crtc = &output->crtc;
struct vkms_plane *primary, *cursor = NULL;
int ret;
int writeback;
unsigned int n;
/*
* Initialize used plane. One primary plane is required to perform the composition.
*
* The overlay and cursor planes are not mandatory, but can be used to perform complex
* composition.
*/
primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
if (IS_ERR(primary))
return PTR_ERR(primary);
if (vkmsdev->config->overlay) {
for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
ret = vkms_add_overlay_plane(vkmsdev, index, crtc);
if (ret)
return ret;
}
}
if (vkmsdev->config->cursor) {
cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
if (IS_ERR(cursor))
return PTR_ERR(cursor);
}
/* [1]: Allocation of a CRTC, its index will be BIT(0) = 1 */
ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
if (ret)
return ret;
ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret) {
DRM_ERROR("Failed to init connector\n");
return ret;
}
drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL, NULL);
if (ret) {
DRM_ERROR("Failed to init encoder\n");
goto err_encoder;
}
/*
* This is a hardcoded value to select crtc for the encoder.
* BIT(0) here designate the first registered CRTC, the one allocated in [1]
*/
encoder->possible_crtcs = BIT(0);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret) {
DRM_ERROR("Failed to attach connector to encoder\n");
goto err_attach;
}
if (vkmsdev->config->writeback) {
writeback = vkms_enable_writeback_connector(vkmsdev);
if (writeback)
DRM_ERROR("Failed to init writeback connector\n");
}
drm_mode_config_reset(dev);
return 0;
err_attach:
drm_encoder_cleanup(encoder);
err_encoder:
drm_connector_cleanup(connector);
return ret;
}
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