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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <drm/drm_framebuffer.h>
#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 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(wb_layer, dflow, fb);
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)
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;
struct drm_display_info *info;
u32 *formats, n_formats = 0;
int err;
if (!kcrtc->master->wb_layer)
return 0;
kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL);
if (!kwb_conn)
return -ENOMEM;
kwb_conn->wb_layer = kcrtc->master->wb_layer;
wb_conn = &kwb_conn->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,
BIT(drm_crtc_index(&kcrtc->base)));
komeda_put_fourcc_list(formats);
if (err) {
kfree(kwb_conn);
return err;
}
drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
info = &kwb_conn->base.base.display_info;
info->bpc = __fls(kcrtc->master->improc->supported_color_depths);
info->color_formats = kcrtc->master->improc->supported_color_formats;
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;
}
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