display/komeda/komeda_wb_connector.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
0004  * Author: James.Qian.Wang <james.qian.wang@arm.com>
0005  *
0006  */
0007 #include <drm/drm_framebuffer.h>
0008 #include "komeda_dev.h"
0009 #include "komeda_kms.h"
0010
0011 static int
0012 komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
0013              struct drm_connector_state *conn_st,
0014              struct komeda_crtc_state *kcrtc_st,
0015              struct komeda_data_flow_cfg *dflow)
0016 {
0017     struct drm_framebuffer *fb = conn_st->writeback_job->fb;
0018
0019     memset(dflow, 0, sizeof(*dflow));
0020
0021     dflow->out_w = fb->width;
0022     dflow->out_h = fb->height;
0023
0024     /* the write back data comes from the compiz */
0025     pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h);
0026     dflow->input.component = &wb_layer->base.pipeline->compiz->base;
0027     /* compiz doesn't output alpha */
0028     dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
0029     dflow->rot = DRM_MODE_ROTATE_0;
0030
0031     komeda_complete_data_flow_cfg(wb_layer, dflow, fb);
0032
0033     return 0;
0034 }
0035
0036 static int
0037 komeda_wb_encoder_atomic_check(struct drm_encoder *encoder,
0038                    struct drm_crtc_state *crtc_st,
0039                    struct drm_connector_state *conn_st)
0040 {
0041     struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
0042     struct drm_writeback_job *writeback_job = conn_st->writeback_job;
0043     struct komeda_layer *wb_layer;
0044     struct komeda_data_flow_cfg dflow;
0045     int err;
0046
0047     if (!writeback_job)
0048         return 0;
0049
0050     if (!crtc_st->active) {
0051         DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
0052         return -EINVAL;
0053     }
0054
0055     wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer;
0056
0057     /*
0058      * No need for a full modested when the only connector changed is the
0059      * writeback connector.
0060      */
0061     if (crtc_st->connectors_changed &&
0062         is_only_changed_connector(crtc_st, conn_st->connector))
0063         crtc_st->connectors_changed = false;
0064
0065     err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow);
0066     if (err)
0067         return err;
0068
0069     if (dflow.en_split)
0070         err = komeda_build_wb_split_data_flow(wb_layer,
0071                 conn_st, kcrtc_st, &dflow);
0072     else
0073         err = komeda_build_wb_data_flow(wb_layer,
0074                 conn_st, kcrtc_st, &dflow);
0075
0076     return err;
0077 }
0078
0079 static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = {
0080     .atomic_check = komeda_wb_encoder_atomic_check,
0081 };
0082
0083 static int
0084 komeda_wb_connector_get_modes(struct drm_connector *connector)
0085 {
0086     return 0;
0087 }
0088
0089 static enum drm_mode_status
0090 komeda_wb_connector_mode_valid(struct drm_connector *connector,
0091                    struct drm_display_mode *mode)
0092 {
0093     struct drm_device *dev = connector->dev;
0094     struct drm_mode_config *mode_config = &dev->mode_config;
0095     int w = mode->hdisplay, h = mode->vdisplay;
0096
0097     if ((w < mode_config->min_width) || (w > mode_config->max_width))
0098         return MODE_BAD_HVALUE;
0099
0100     if ((h < mode_config->min_height) || (h > mode_config->max_height))
0101         return MODE_BAD_VVALUE;
0102
0103     return MODE_OK;
0104 }
0105
0106 static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = {
0107     .get_modes  = komeda_wb_connector_get_modes,
0108     .mode_valid = komeda_wb_connector_mode_valid,
0109 };
0110
0111 static enum drm_connector_status
0112 komeda_wb_connector_detect(struct drm_connector *connector, bool force)
0113 {
0114     return connector_status_connected;
0115 }
0116
0117 static int
0118 komeda_wb_connector_fill_modes(struct drm_connector *connector,
0119                    uint32_t maxX, uint32_t maxY)
0120 {
0121     return 0;
0122 }
0123
0124 static void komeda_wb_connector_destroy(struct drm_connector *connector)
0125 {
0126     drm_connector_cleanup(connector);
0127     kfree(to_kconn(to_wb_conn(connector)));
0128 }
0129
0130 static const struct drm_connector_funcs komeda_wb_connector_funcs = {
0131     .reset          = drm_atomic_helper_connector_reset,
0132     .detect         = komeda_wb_connector_detect,
0133     .fill_modes     = komeda_wb_connector_fill_modes,
0134     .destroy        = komeda_wb_connector_destroy,
0135     .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0136     .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
0137 };
0138
0139 static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
0140                    struct komeda_crtc *kcrtc)
0141 {
0142     struct komeda_dev *mdev = kms->base.dev_private;
0143     struct komeda_wb_connector *kwb_conn;
0144     struct drm_writeback_connector *wb_conn;
0145     struct drm_display_info *info;
0146     u32 *formats, n_formats = 0;
0147     int err;
0148
0149     if (!kcrtc->master->wb_layer)
0150         return 0;
0151
0152     kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL);
0153     if (!kwb_conn)
0154         return -ENOMEM;
0155
0156     kwb_conn->wb_layer = kcrtc->master->wb_layer;
0157
0158     wb_conn = &kwb_conn->base;
0159
0160     formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
0161                            kwb_conn->wb_layer->layer_type,
0162                            &n_formats);
0163
0164     err = drm_writeback_connector_init(&kms->base, wb_conn,
0165                        &komeda_wb_connector_funcs,
0166                        &komeda_wb_encoder_helper_funcs,
0167                        formats, n_formats,
0168                        BIT(drm_crtc_index(&kcrtc->base)));
0169     komeda_put_fourcc_list(formats);
0170     if (err) {
0171         kfree(kwb_conn);
0172         return err;
0173     }
0174
0175     drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
0176
0177     info = &kwb_conn->base.base.display_info;
0178     info->bpc = __fls(kcrtc->master->improc->supported_color_depths);
0179     info->color_formats = kcrtc->master->improc->supported_color_formats;
0180
0181     kcrtc->wb_conn = kwb_conn;
0182
0183     return 0;
0184 }
0185
0186 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
0187                  struct komeda_dev *mdev)
0188 {
0189     int i, err;
0190
0191     for (i = 0; i < kms->n_crtcs; i++) {
0192         err = komeda_wb_connector_add(kms, &kms->crtcs[i]);
0193         if (err)
0194             return err;
0195     }
0196
0197     return 0;
0198 }