152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include <linux/dma-buf-map.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_writeback.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include "vkms_drv.h"
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static const u32 vkms_wb_formats[] = {
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DRM_FORMAT_XRGB8888,
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};
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static const struct drm_connector_funcs vkms_wb_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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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_wb_encoder_atomic_check(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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struct drm_framebuffer *fb;
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const struct drm_display_mode *mode = &crtc_state->mode;
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if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
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return 0;
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fb = conn_state->writeback_job->fb;
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if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
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DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
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fb->width, fb->height);
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return -EINVAL;
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}
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if (fb->format->format != vkms_wb_formats[0]) {
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DRM_DEBUG_KMS("Invalid pixel format %p4cc\n",
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&fb->format->format);
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return -EINVAL;
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}
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return 0;
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}
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static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = {
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.atomic_check = vkms_wb_encoder_atomic_check,
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};
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static int vkms_wb_connector_get_modes(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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return drm_add_modes_noedid(connector, dev->mode_config.max_width,
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dev->mode_config.max_height);
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}
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static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector,
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struct drm_writeback_job *job)
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{
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struct vkms_writeback_job *vkmsjob;
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int ret;
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if (!job->fb)
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return 0;
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vkmsjob = kzalloc(sizeof(*vkmsjob), GFP_KERNEL);
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if (!vkmsjob)
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return -ENOMEM;
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ret = drm_gem_fb_vmap(job->fb, vkmsjob->map, vkmsjob->data);
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if (ret) {
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DRM_ERROR("vmap failed: %d\n", ret);
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goto err_kfree;
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}
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job->priv = vkmsjob;
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return 0;
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err_kfree:
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kfree(vkmsjob);
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return ret;
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}
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static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
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struct drm_writeback_job *job)
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{
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struct vkms_writeback_job *vkmsjob = job->priv;
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struct vkms_device *vkmsdev;
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if (!job->fb)
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return;
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drm_gem_fb_vunmap(job->fb, vkmsjob->map);
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vkmsdev = drm_device_to_vkms_device(job->fb->dev);
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vkms_set_composer(&vkmsdev->output, false);
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kfree(vkmsjob);
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}
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static void vkms_wb_atomic_commit(struct drm_connector *conn,
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struct drm_atomic_state *state)
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{
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struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
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conn);
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struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
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struct vkms_output *output = &vkmsdev->output;
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struct drm_writeback_connector *wb_conn = &output->wb_connector;
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struct drm_connector_state *conn_state = wb_conn->base.state;
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struct vkms_crtc_state *crtc_state = output->composer_state;
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if (!conn_state)
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return;
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vkms_set_composer(&vkmsdev->output, true);
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spin_lock_irq(&output->composer_lock);
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crtc_state->active_writeback = conn_state->writeback_job->priv;
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crtc_state->wb_pending = true;
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spin_unlock_irq(&output->composer_lock);
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drm_writeback_queue_job(wb_conn, connector_state);
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}
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static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
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.get_modes = vkms_wb_connector_get_modes,
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.prepare_writeback_job = vkms_wb_prepare_job,
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.cleanup_writeback_job = vkms_wb_cleanup_job,
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.atomic_commit = vkms_wb_atomic_commit,
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};
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int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
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{
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struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
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vkmsdev->output.wb_connector.encoder.possible_crtcs = 1;
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drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
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return drm_writeback_connector_init(&vkmsdev->drm, wb,
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&vkms_wb_connector_funcs,
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&vkms_wb_encoder_helper_funcs,
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vkms_wb_formats,
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ARRAY_SIZE(vkms_wb_formats));
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}
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