drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
   4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
   5  *
   6  */
   7 #include "komeda_dev.h"
   8 #include "komeda_kms.h"
   9
  10 static int
  11 komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
  12                          struct drm_connector_state *conn_st,
  13                          struct komeda_crtc_state *kcrtc_st,
  14                          struct komeda_data_flow_cfg *dflow)
  15 {
  16         struct drm_framebuffer *fb = conn_st->writeback_job->fb;
  17
  18         memset(dflow, 0, sizeof(*dflow));
  19
  20         dflow->out_w = fb->width;
  21         dflow->out_h = fb->height;
  22
  23         /* the write back data comes from the compiz */
  24         pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h);
  25         dflow->input.component = &wb_layer->base.pipeline->compiz->base;
  26         /* compiz doesn't output alpha */
  27         dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
  28         dflow->rot = DRM_MODE_ROTATE_0;
  29
  30         komeda_complete_data_flow_cfg(wb_layer, dflow, fb);
  31
  32         return 0;
  33 }
  34
  35 static int
  36 komeda_wb_encoder_atomic_check(struct drm_encoder *encoder,
  37                                struct drm_crtc_state *crtc_st,
  38                                struct drm_connector_state *conn_st)
  39 {
  40         struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
  41         struct drm_writeback_job *writeback_job = conn_st->writeback_job;
  42         struct komeda_layer *wb_layer;
  43         struct komeda_data_flow_cfg dflow;
  44         int err;
  45
  46         if (!writeback_job || !writeback_job->fb) {
  47                 return 0;
  48         }
  49
  50         if (!crtc_st->active) {
  51                 DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
  52                 return -EINVAL;
  53         }
  54
  55         wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer;
  56
  57         /*
  58          * No need for a full modested when the only connector changed is the
  59          * writeback connector.
  60          */
  61         if (crtc_st->connectors_changed &&
  62             is_only_changed_connector(crtc_st, conn_st->connector))
  63                 crtc_st->connectors_changed = false;
  64
  65         err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow);
  66         if (err)
  67                 return err;
  68
  69         if (dflow.en_split)
  70                 err = komeda_build_wb_split_data_flow(wb_layer,
  71                                 conn_st, kcrtc_st, &dflow);
  72         else
  73                 err = komeda_build_wb_data_flow(wb_layer,
  74                                 conn_st, kcrtc_st, &dflow);
  75
  76         return err;
  77 }
  78
  79 static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = {
  80         .atomic_check = komeda_wb_encoder_atomic_check,
  81 };
  82
  83 static int
  84 komeda_wb_connector_get_modes(struct drm_connector *connector)
  85 {
  86         return 0;
  87 }
  88
  89 static enum drm_mode_status
  90 komeda_wb_connector_mode_valid(struct drm_connector *connector,
  91                                struct drm_display_mode *mode)
  92 {
  93         struct drm_device *dev = connector->dev;
  94         struct drm_mode_config *mode_config = &dev->mode_config;
  95         int w = mode->hdisplay, h = mode->vdisplay;
  96
  97         if ((w < mode_config->min_width) || (w > mode_config->max_width))
  98                 return MODE_BAD_HVALUE;
  99
 100         if ((h < mode_config->min_height) || (h > mode_config->max_height))
 101                 return MODE_BAD_VVALUE;
 102
 103         return MODE_OK;
 104 }
 105
 106 static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = {
 107         .get_modes      = komeda_wb_connector_get_modes,
 108         .mode_valid     = komeda_wb_connector_mode_valid,
 109 };
 110
 111 static enum drm_connector_status
 112 komeda_wb_connector_detect(struct drm_connector *connector, bool force)
 113 {
 114         return connector_status_connected;
 115 }
 116
 117 static int
 118 komeda_wb_connector_fill_modes(struct drm_connector *connector,
 119                                uint32_t maxX, uint32_t maxY)
 120 {
 121         return 0;
 122 }
 123
 124 static void komeda_wb_connector_destroy(struct drm_connector *connector)
 125 {
 126         drm_connector_cleanup(connector);
 127         kfree(to_kconn(to_wb_conn(connector)));
 128 }
 129
 130 static const struct drm_connector_funcs komeda_wb_connector_funcs = {
 131         .reset                  = drm_atomic_helper_connector_reset,
 132         .detect                 = komeda_wb_connector_detect,
 133         .fill_modes             = komeda_wb_connector_fill_modes,
 134         .destroy                = komeda_wb_connector_destroy,
 135         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 136         .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
 137 };
 138
 139 static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
 140                                    struct komeda_crtc *kcrtc)
 141 {
 142         struct komeda_dev *mdev = kms->base.dev_private;
 143         struct komeda_wb_connector *kwb_conn;
 144         struct drm_writeback_connector *wb_conn;
 145         u32 *formats, n_formats = 0;
 146         int err;
 147
 148         if (!kcrtc->master->wb_layer)
 149                 return 0;
 150
 151         kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL);
 152         if (!kwb_conn)
 153                 return -ENOMEM;
 154
 155         kwb_conn->wb_layer = kcrtc->master->wb_layer;
 156
 157         wb_conn = &kwb_conn->base;
 158         wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base));
 159
 160         formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
 161                                                kwb_conn->wb_layer->layer_type,
 162                                                &n_formats);
 163
 164         err = drm_writeback_connector_init(&kms->base, wb_conn,
 165                                            &komeda_wb_connector_funcs,
 166                                            &komeda_wb_encoder_helper_funcs,
 167                                            formats, n_formats);
 168         komeda_put_fourcc_list(formats);
 169         if (err)
 170                 return err;
 171
 172         drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
 173
 174         kcrtc->wb_conn = kwb_conn;
 175
 176         return 0;
 177 }
 178
 179 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
 180                                  struct komeda_dev *mdev)
 181 {
 182         int i, err;
 183
 184         for (i = 0; i < kms->n_crtcs; i++) {
 185                 err = komeda_wb_connector_add(kms, &kms->crtcs[i]);
 186                 if (err)
 187                         return err;
 188         }
 189
 190         return 0;
 191 }