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dbd9d80c1b
This patch implements the necessary functions to add writeback support for vkms. This feature is useful for testing compositors if you don't have hardware with writeback support. Change in V4 (Emil and Melissa): - Move signal completion above drm_crtc_add_crc_entry() - Make writeback always available - Use appropriate namespace - Drop fb check in vkms_wb_atomic_commit - Make vkms_set_composer visible for writeback code - Enable composer operation on prepare_job and disable it on cleanup_job - Drop extra space at the end of the file - Rebase Change in V3 (Daniel): - If writeback is enabled, compose everything into the writeback buffer instead of CRC private buffer - Guarantees that the CRC will match exactly what we have in the writeback buffer. Change in V2: - Rework signal completion (Brian) - Integrates writeback with active_planes (Daniel) - Compose cursor (Daniel) Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com> Reviewed-by: Liviu Dudau <liviu.dudau@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200830142000.146706-4-rodrigosiqueiramelo@gmail.com
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include "vkms_drv.h"
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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static void vkms_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_funcs vkms_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = vkms_connector_destroy,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static int vkms_conn_get_modes(struct drm_connector *connector)
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{
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int count;
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count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
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drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
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return count;
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}
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static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
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.get_modes = vkms_conn_get_modes,
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};
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int vkms_output_init(struct vkms_device *vkmsdev, int index)
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{
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struct vkms_output *output = &vkmsdev->output;
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struct drm_device *dev = &vkmsdev->drm;
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struct drm_connector *connector = &output->connector;
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struct drm_encoder *encoder = &output->encoder;
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struct drm_crtc *crtc = &output->crtc;
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struct drm_plane *primary, *cursor = NULL;
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int ret;
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primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
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if (IS_ERR(primary))
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return PTR_ERR(primary);
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if (enable_cursor) {
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cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
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if (IS_ERR(cursor)) {
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ret = PTR_ERR(cursor);
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goto err_cursor;
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}
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}
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ret = vkms_crtc_init(dev, crtc, primary, cursor);
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if (ret)
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goto err_crtc;
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ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
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DRM_MODE_CONNECTOR_VIRTUAL);
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if (ret) {
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DRM_ERROR("Failed to init connector\n");
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goto err_connector;
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}
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drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
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ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
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if (ret) {
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DRM_ERROR("Failed to init encoder\n");
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goto err_encoder;
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}
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encoder->possible_crtcs = 1;
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ret = drm_connector_attach_encoder(connector, encoder);
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if (ret) {
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DRM_ERROR("Failed to attach connector to encoder\n");
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goto err_attach;
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}
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ret = vkms_enable_writeback_connector(vkmsdev);
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if (ret)
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DRM_ERROR("Failed to init writeback connector\n");
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drm_mode_config_reset(dev);
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return 0;
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err_attach:
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drm_encoder_cleanup(encoder);
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err_encoder:
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drm_connector_cleanup(connector);
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err_connector:
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drm_crtc_cleanup(crtc);
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err_crtc:
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if (enable_cursor)
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drm_plane_cleanup(cursor);
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err_cursor:
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drm_plane_cleanup(primary);
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return ret;
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}
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