diff options
Diffstat (limited to 'drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c')
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c new file mode 100644 index 000000000000..bb8a61f6e9a4 --- /dev/null +++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c @@ -0,0 +1,199 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. + * Author: James.Qian.Wang <james.qian.wang@arm.com> + * + */ +#include "komeda_dev.h" +#include "komeda_kms.h" + +static int +komeda_wb_init_data_flow(struct komeda_layer *wb_layer, + struct drm_connector_state *conn_st, + struct komeda_crtc_state *kcrtc_st, + struct komeda_data_flow_cfg *dflow) +{ + struct komeda_scaler *scaler = wb_layer->base.pipeline->scalers[0]; + struct drm_framebuffer *fb = conn_st->writeback_job->fb; + + memset(dflow, 0, sizeof(*dflow)); + + dflow->out_w = fb->width; + dflow->out_h = fb->height; + + /* the write back data comes from the compiz */ + pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h); + dflow->input.component = &wb_layer->base.pipeline->compiz->base; + /* compiz doesn't output alpha */ + dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE; + dflow->rot = DRM_MODE_ROTATE_0; + + komeda_complete_data_flow_cfg(dflow, fb); + + /* if scaling exceed the acceptable scaler input/output range, try to + * enable split. + */ + if (dflow->en_scaling && scaler) + dflow->en_split = !in_range(&scaler->hsize, dflow->in_w) || + !in_range(&scaler->hsize, dflow->out_w); + + return 0; +} + +static int +komeda_wb_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_st, + struct drm_connector_state *conn_st) +{ + struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st); + struct drm_writeback_job *writeback_job = conn_st->writeback_job; + struct komeda_layer *wb_layer; + struct komeda_data_flow_cfg dflow; + int err; + + if (!writeback_job || !writeback_job->fb) { + return 0; + } + + if (!crtc_st->active) { + DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n"); + return -EINVAL; + } + + wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer; + + /* + * No need for a full modested when the only connector changed is the + * writeback connector. + */ + if (crtc_st->connectors_changed && + is_only_changed_connector(crtc_st, conn_st->connector)) + crtc_st->connectors_changed = false; + + err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow); + if (err) + return err; + + if (dflow.en_split) + err = komeda_build_wb_split_data_flow(wb_layer, + conn_st, kcrtc_st, &dflow); + else + err = komeda_build_wb_data_flow(wb_layer, + conn_st, kcrtc_st, &dflow); + + return err; +} + +static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = { + .atomic_check = komeda_wb_encoder_atomic_check, +}; + +static int +komeda_wb_connector_get_modes(struct drm_connector *connector) +{ + return 0; +} + +static enum drm_mode_status +komeda_wb_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + struct drm_mode_config *mode_config = &dev->mode_config; + int w = mode->hdisplay, h = mode->vdisplay; + + if ((w < mode_config->min_width) || (w > mode_config->max_width)) + return MODE_BAD_HVALUE; + + if ((h < mode_config->min_height) || (h > mode_config->max_height)) + return MODE_BAD_VVALUE; + + return MODE_OK; +} + +static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = { + .get_modes = komeda_wb_connector_get_modes, + .mode_valid = komeda_wb_connector_mode_valid, +}; + +static enum drm_connector_status +komeda_wb_connector_detect(struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static int +komeda_wb_connector_fill_modes(struct drm_connector *connector, + uint32_t maxX, uint32_t maxY) +{ + return 0; +} + +static void komeda_wb_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); + kfree(to_kconn(to_wb_conn(connector))); +} + +static const struct drm_connector_funcs komeda_wb_connector_funcs = { + .reset = drm_atomic_helper_connector_reset, + .detect = komeda_wb_connector_detect, + .fill_modes = komeda_wb_connector_fill_modes, + .destroy = komeda_wb_connector_destroy, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int komeda_wb_connector_add(struct komeda_kms_dev *kms, + struct komeda_crtc *kcrtc) +{ + struct komeda_dev *mdev = kms->base.dev_private; + struct komeda_wb_connector *kwb_conn; + struct drm_writeback_connector *wb_conn; + u32 *formats, n_formats = 0; + int err; + + if (!kcrtc->master->wb_layer) + return 0; + + kwb_conn = kzalloc(sizeof(*wb_conn), GFP_KERNEL); + if (!kwb_conn) + return -ENOMEM; + + kwb_conn->wb_layer = kcrtc->master->wb_layer; + + wb_conn = &kwb_conn->base; + wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base)); + + formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl, + kwb_conn->wb_layer->layer_type, + &n_formats); + + err = drm_writeback_connector_init(&kms->base, wb_conn, + &komeda_wb_connector_funcs, + &komeda_wb_encoder_helper_funcs, + formats, n_formats); + komeda_put_fourcc_list(formats); + if (err) + return err; + + drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs); + + kcrtc->wb_conn = kwb_conn; + + return 0; +} + +int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, + struct komeda_dev *mdev) +{ + int i, err; + + for (i = 0; i < kms->n_crtcs; i++) { + err = komeda_wb_connector_add(kms, &kms->crtcs[i]); + if (err) + return err; + } + + return 0; +} |